Absorbent article of improved functions

FIELD: hygienic items, in particular sanitary towels.

SUBSTANCE: claimed article has multicomponent absorbing structure, containing the first liquid absorbing component which represents bonded flexible matrix including stratified layers made of fibrous material, and the second liquid absorbing component.

EFFECT: article of increased liquid absorbing capability and improved adjoining.

24 cl, 9 dwg, 5 tbl, 4 ex

 

The scope of the invention

The present invention relates primarily to the field of absorbent products. In particular, the present invention relates to the subject of personal hygiene, with improved functioning. The present invention is directed to personal hygiene items including feminine pads with improved functioning.

Prior art

In the manufacture of absorbent products, such as personal hygiene products, continuously making efforts to improve the performance of the product. Although these products usually have many components, the functioning of some products can be influenced, first of all, components that distribute and/or absorb liquid. Accordingly, manufacturers are striving to find ways to improve the properties of the working fluid materials used in these products to improve their function.

One way to improve the functioning of these types of products is wide use of fluff pulp and/or super absorbent materials. For example, new trends in commercial design diapers are more super absorbent materials and fewer fibers to make the diaper more subtle. However, despite the increase in the total is barbarouses capacity by adding large quantities of superabsorbent material such diapers often still suffer from excessive leakage during use.

One of the reasons why absorbent products with a high content of super absorbent materials still allow leaking, is that many super-absorbent materials are unable to absorb the liquid at the speed at which the fluid enters the absorbent composite in the course of its use.

Adding fibrous material to the absorbent composite improves the resistance to leakage of the absorbent composite due to the temporary retention of fluid up until superabsorbers material will not absorb it. Fibers also serve to separate particles of superabsorbent material, reducing the likelihood of gel blocking. Used herein, the term "gel blocking" refers to the situation when the particles of superabsorbent material are deformed during swelling and block the voids between particles or between particles and fibers, thus preventing the flow of fluid through the voids. Even when the absorbent composite includes a fibrous material, a bad choice of the superabsorbent material, especially that which is peculiar to gel blocking within the absorbent composite, leads to poor properties of the working fluid initially and later in the working cycle of the absorbent composite. Thus, the choice of specification the definition of the superabsorbent material significantly affects the adsorption capacity in the use and leakage from the absorbent product.

Another problem with some commercially available absorbent products such as diapers, consists in the tendency of the product to leak after multiple selections. Used herein, the term "selection" refers to a single introduction of liquid into the absorbent material. For example, during use of the diaper is usually subjected to repeated discharge during the operating cycle of the diaper. To reduce the leakage of the diaper during the working cycle of the diaper, it is desirable to maintain the level of absorption characteristics of the absorbent composite for the entire lifetime of the product.

Another problem is that once happened selection in the product that bears the product can feel the humidity from the liquid even if the liquid was absorbed by the product. In the case of blood and/or urine these fluids will irritate human skin, if they remain in contact with human skin. In this case, if the absorbent product is not capable of removing the liquid away from the surface of the product, which is in contact with the user, the skin of the user may be subjected to irritation, even if the product does not leak.

Finally, in the case of some absorbent products such as feminine pads, used absorbent materials may be able to absorb the separation is their liquid without leaking, but, especially if the liquid is menstrual secretions, fluid will be easily visible on all product. This is not preferable for consumers and, as noted above, can cause skin irritation if the liquid remains in contact with the skin. However, even if no irritation occurs, appearance of the product after separation is not aesthetically pleasing.

A number of U.S. patents directed to the solution of various problems related to absorbent composites. For example, U.S. patent number 5147343 issued to Kellenberger (Kellenberger), indicates the importance that superabsorbent had a high absorbency under load in an absorbent product. U.S. patent number 5149335 issued to Kellenberger and others, points to the importance of speed of absorption of superabsorbent and its capacity in the composite. U.S. patent number 5415643 issued to Melius (Melius) and others, points to the importance of values absorbency under load (VSN) at different pressures. U.S. patent number 5599335 issued by Goldman (Goldman), stresses the benefits of the combination of high conductivity flow of salt solution and high performance under pressure. U.S. patent number 5728082 issued to Gustafsson (Gustafsson), and others, describes an absorbent body, consisting of two layers, superabsorbent granules, where superabsorbent in the first layer is a meet high degree of crosslinking, while superabsorbent in the second layer has a higher absorbent capacity than superabsorbent in the first layer.

The above patents disclose the specific super-absorbent properties, which lead to improved functioning of the composite. In General, the aforementioned patents indicate that the super-absorbent material showing high capacity under load, lead to improved rigidity of the gel and the mode of permeability for improved functioning of the composite. However, the above-mentioned patents is still not able to ensure the production of absorbent products such as diapers or feminine pad, which provide maximum protection, no leaking, remain dry to the touch and, in the case of feminine sanitary pads provide the best convenience for carrying.

Accordingly, a need exists for an absorbent article that includes an improved absorbent structure that provides maximum protection for carrying the product. There is also a need for an absorbent article that includes an improved absorbent structure that works effectively with liquids and at the same time retains a relatively small size, no matter includes an absorbent structure of the super-absorbent materials or not. There on revnost in an absorbent product, which has an improved absorbent structure, which remains dry to the touch. In addition, there is a need for an absorbent article which has an improved absorbent structure, which provides a better fit for the user of the product. Finally, you need an absorbent product that is visually more aesthetically pleasing even after the absorbent article is exposed to discharge.

Summary of invention

Higher specific needs addressed the present invention is directed to multi-component absorbent liquid structure. The structure includes:

the first absorbent liquid component, which is connected by a flexible matrix including stratified layers of fibrous material, and the first absorbent liquid component has a first main surface, a second main surface, the first full square, and the first volume, and

the second absorbent liquid component, which is a different layer of absorbent liquid material adjacent to the second major surface of the first absorbent liquid component, and the second absorbent liquid component has a second full size and a second volume such that the ratio of the second full plomatic first full square is more about a 3.5 to 1, and the ratio of the second volume to the first volume is more than about 10 to 1, and the full amount of a fluid-absorbing structure is less than approximately 130 cm3.

For example, the ratio of the second area to the first area may be in the range of about 3.5 to 1 to about 8 to 1. Preferably, this ratio is approximately 4 to 1.

As another example, the ratio of the second volume to the first volume may be in the range of from about 10 to 1 to about 100 to 1. In embodiments of the invention, where the second absorbent liquid component uses relatively high levels of superabsorbent and is relatively thin, the ratio of the second volume to the first volume may be in the range of from about 10 to 1 to about 30 : 1 and preferably may be approximately 16 to 1. In embodiments of the invention, where the second absorbent liquid component uses relatively high levels of fluff pulp, the ratio of the second volume to the first volume may be in the range of from about 30 to 1 to about 100 to 1. As another example, the ratio may preferably be in the range of from about 50 to 1 to AP is sustained fashion, 75 to 1. As a further example, the ratio may be, preferably, about 75 to 1.

In one aspect of the invention the full amount of a fluid-absorbing structure is less than approximately 130 cm3. Preferably, the full amount of a fluid-absorbing structure is less than approximately 100 cm3. More preferably, the full amount of a fluid-absorbing structure is less than about 50 cm3. Even more preferably, the full amount of a fluid-absorbing structure is less than approximately 30 cm3. Most preferably, the full amount of a fluid-absorbing structure is less than approximately 25 cm3.

In accordance with the invention, the first absorbent liquid component can have layers consisting of aerodynamically laid fibers of staple length, aerodynamically laid fluff pulp fibers, aerodynamically laid fibers chemically modified, hydrogel fibers and combinations thereof. In an aspect of this invention is typically stratified layers of the first absorbent liquid component include at least two layers of fibrous nonwoven mesh. It is desirable that at least one of the layers of fibrous nonwoven material selected from non-woven materials from carding, materials, with ormoving aerodynamic method, fibrous materials obtained by the aerodynamic method of melt material from the threads spunbond production method, hydraulically bound fibrous materials, and combinations thereof.

In one aspect of the invention, the first absorbent liquid component further includes particles of material. These particles can be superabsorbers materials (also cited as such hydrogel materials).

To the first absorbent liquid component was associated with a matrix of fibrous material, it may be associated with the use of thermally bonding fibers, adhesives, thermal point bonding, mechanical weave, latex emulsions, and combinations thereof.

The second absorbent liquid component may be selected from composite structures containing hydrogel structures of fluff pulp and conventional homogeneous structures obtained aerodynamic styling.

In one aspect of the invention, it is desirable that the void in the second main surface of the first absorbent liquid component were configured to transfer liquid, mainly along the first absorbing liquid component in addition to the release of fluid in the second absorbent liquid component.

In another aspect of the invented what I first absorbent liquid component holds less approximately, 30% of artificial menstrual fluid, approximately 1 minute after injection, approximately 10 ml of secretions in the center of the first main surface of the first absorbent liquid component. For example, the first absorbent liquid component holds less than approximately 25% of artificial menstrual fluid, approximately 1 minute after allocation, amounting to approximately 10 ml, it is Desirable that the first absorbent liquid component is kept less than about 20% of artificial menstrual fluid through, about 1 minute after allocation, amounting to approximately 10 ml more preferably, the first absorbent liquid component is kept less than about 15% of artificial menstrual fluid through, about 1 minute after the allocation of approximately 10 ml.

In another aspect of the present invention, the first absorbent liquid component overlaps or covers at least about 50% of the area of the spots of the second absorbent liquid component produced artificial menstrual fluid through, about 10 minutes after approximately 5 ml of selection was introduced in the center of the first main surface of the first absorbent liquid component. For example, the first absorbing the second liquid component overlaps or covers, at least, approximately, 70% of the area of the spots of the second absorbent liquid component produced artificial menstrual fluid through, about 10 minutes after approximately 5 ml of selection was introduced in the center of the first main surface of the first absorbent liquid component. As another example, the first absorbent liquid component overlaps or covers at least from about 75% to about 100% of the area of the spots of the second absorbent liquid component produced artificial menstrual fluid through, about 10 minutes after approximately 5 ml of selection was introduced in the center of the first main surface of the first absorbent liquid component. As another example, the first absorbent liquid component overlaps or covers at least from about 80% to about 100% of the area of the spots of the second absorbent liquid component produced artificial menstrual fluid through, about 10 minutes after approximately 5 ml of selection was introduced in the center of the first main surface of the first absorbent liquid component.

In another aspect of the present invention, the first absorbent liquid component provides R is Opredelenie voids, which are smaller in size next to the second main surface and larger near the first main surface. For example, voids near the first main surface can be approximately 1.25 times greater than the void next to the second main surface. This difference in size may be in the range from approximately a 1.25 to 1 to approximately 3 to 1. Preferably, this difference in size was located in the range of from about 1.5 to 1 to about 2.5 to 1.

In another aspect of the invention, the first absorbent liquid component can provide the distribution of voids, which are smaller in size next to the second main surface than the voids in the second absorbent liquid component adjacent to the second main surface.

In another aspect of the invention, the first absorbent liquid component provides the distribution of voids, which are the same size or slightly larger near the second main surface than the voids in the second absorbent liquid component adjacent to the second main surface.

The present invention also encompasses a multi-component liquid absorbent structure including:

the first absorbent liquid components is NT in the form of the associated flexible matrix, including stratified layers of fibrous material, and the first absorbent liquid component has a first main surface, a second main surface, the first full size and the first size of the absorption liquid, and

the second absorbent liquid component containing at least one layer differs a fluid-absorbing material adjacent to the second major surface of the first absorbent liquid component, and the second absorbent liquid component has a second full size and the second tank absorption liquid,

such that the ratio of the second area to the first total area is more than about a 3.5 to 1, the ratio of the second tank absorption liquid to the first tank absorption liquid is more than about 10 to 1, and the full capacity of the absorption liquid absorbent liquid is more than about 35 grams.

Generally speaking, the capacity of the absorption liquid of the first absorbent liquid component may be in the range from about 3 grams to about 10 grams. The capacity of the absorption liquid to the first absorbent liquid component, preferably, is approximately 6 grams. The capacity of the absorption liquid of the second absorbent liquid component may lie in what intervale from, about 35 grams to about 600 grams. For example, the capacity of the absorption liquid of the second absorbent liquid component may be in the range from about 35 grams to about 150 grams. The capacity of the absorption liquid to the second absorbent liquid component, preferably, is approximately 100 grams.

The ratio of the second tank absorption liquid to the first tank absorption liquid may be in the range of from about 3.5 to 1 to about 200 : 1. Preferably, this ratio will lie in the range of from about 10 to 1 to about 30 : 1. More preferably, this ratio will be approximately 16 to 1.

The present invention also covers the absorbent subject of personal hygiene, including the above absorbent structure. Absorbent subject of personal hygiene can be in the form of sanitary napkins (pads). For example, in one embodiment, the sanitary napkin may have a longitudinal axis and improves fluid based on the use of multi-component absorbent structure, and the sanitary napkin may include:

permeable to fluid directed to the body layer;

impervious to liquids converted to clothing layer; and

multicomponent absorbing the second structure between permeable to fluid directed to the body layer and impermeable to liquids converted to clothing layer, moreover, the multi-component absorbent structure is:

the first absorbing liquid component in which at least part of the component is located on the longitudinal axis of the sanitary napkin, the first absorbing liquid component in the form of the associated flexible matrix of fibrous material forming a generally stratified layers, the first absorbent liquid component has a first main surface adjacent to the permeable fluid directed to the body layer, a second main surface opposite the first main surface, the first full area of the first and the capacity for fluid absorption, and

the second absorbent liquid component comprising at least one layer different from a fluid-absorbing material adjacent to the second major surface of the first absorbent liquid component, and the second absorbent liquid component has a second full size and the second tank absorption liquid such that the ratio of the second area to the first total area is more than about a 3.5 to 1 and a ratio of the second tank absorption liquid to the first tank absorption liquid is more than about 10 to 1, and the full capacity of the absorption liquid multi-component absorbent liquid is bol is e, approximately 35 grams.

The first absorbent liquid component and the second absorbent liquid component of multi-component absorbent liquid structure in sanitary napkin and any associated properties and/or relationships can be in the form that, in General, described above.

The sanitary napkin may also include the channel in the second absorbent liquid component that overlaps at least part of the periphery of the first absorbent liquid component. It is desirable to have a channel around the entire periphery of the first absorbent liquid component. The channel, which may be approximately oval or elliptical in shape, creates a configuration where the region inside the channel has a raised surface relative to the rest of sanitary napkins. Because a raised area will be part of sanitary napkins, nearest to the bearing, the channel helps to ensure a better fit. In addition, the channel prevents the leakage of fluid from sanitary napkins.

In yet another embodiment, the present invention comprises a thin, effectively absorbing the liquid structure. This structure includes:

the first absorbent liquid component comprising an associated flexible matrix including stratified layers of fibrous material, and the first absorbent liquid component has a first main surface, the second main surface, the first full size, thickness and volume and the first absorption capacity of the liquid, and

the second absorbent liquid component comprising a layer different from a fluid-absorbing material adjacent to the second major surface of the first absorbent liquid component, and the second absorbent liquid component has a second full size, thickness and volume and the second tank absorption liquid,

such that the thickness of the first and second absorbent liquid components of each is between approximately 1 mm and approximately 2 mm, the ratio of the second tank absorption liquid to the first tank absorption liquid is more than about 10; the ratio of the second area to the first total area is more than about a 3.5 to 1, the ratio of the second volume to the first volume is more than about 10 to 1, and the full amount of a fluid-absorbing structure is less than approximately 30 cm3so the first absorbent liquid component holds less than approximately 30% of artificial menstrual fluid through, about 1 minute after the allocation of approximately 10 ml. for Example, the first absorbent liquid component holds less than approximately 25% of artificial menstrual fluid through p is blithedale, 1 minute after the allocation of approximately 10 ml. Preferably, the first absorbent liquid component holds less than approximately 20% of artificial menstrual fluid through, about 1 minute after the allocation of approximately 10 ml.

The first absorbent liquid component and the second absorbent liquid component of multi-component absorbent liquid structure of thin, effectively absorbing the liquid structure and any associated properties and/or relationships can be in a form that, in General, described above.

These and other features and advantages of the present invention will become apparent after review of the attached drawings and detailed description.

Brief description of drawings

Figures 1A, 1B and 1C show the view with a partial cut view in cross-section and top view, respectively, for sample female strip in accordance with the first embodiment of the present invention.

Figures 2A, 2B, and 2C show the view with a partial cut view in cross-section and top view, respectively, for sample female strip in accordance with the second embodiment of the present invention.

Figures 3A, 3b, and 3C show the view with a partial cut view in cross-section and top view, respectively, for sample female laying in with the accordance with the third embodiment of the present invention.

Figures 4A, 4B, and 4C show the view with a partial cut view in cross-section and top view, respectively, for sample female strip in accordance with the fourth embodiment of the present invention.

Figures 5A, 5B, and 5C show the view with a partial cut view in cross-section and top view, respectively, for sample female strip in accordance with the fifth embodiment of the present invention.

Figures 6A and 6b show how a typical female strip in accordance with one embodiments of the present invention absorbs the allocation of the inside of the product and away from the surface closest to the user of the product.

Figures 7a and 7b show how the typical female strip in accordance with another embodiment of the present invention absorbs the allocation of the inside of the product and away from the surface closest to the user of the product.

Figure 8 is a top view of a test device for measuring the speed at which the absorbent structure absorbs the liquid.

Figure 9 is a view in section of the test device to measure the speed at which the absorbent structure absorbs the liquid.

Detailed description of the invention

Used herein, the terms "nonwoven" and "nonwoven material is" means the net, having a structure of individual fibers or threads which are sandwiched, but not in any identifiable repeatable configuration. Non-woven materials formed previously by various processes, such as, for example, the processes of obtaining materials aerodynamic method from the melt, processes, spunbond method of production and the processes of obtaining material from the carding.

Used herein, the terms "particle", "particle" and the like generally refer to materials that are in the form of finely dispersed, discrete units, such as, for example, granules, fine particles, powders or sphere. The desired shape of the particles include, for example, cubic, rod-like, polyhedral, spherical or hemispherical, rounded or polusharovidnye, angular, irregular, etc. Shape having a large ratio of the largest size to the smallest size such as needles, fibers and flakes, are also considered for use here. Particles of desired shape can be covered (covered with gel-coated protein, and the like, having a core of particulate, porous, solid core, solid core, semi-core, liquid core, semi-core, gas engine, papatoetoe the core, or a combination) or not covered (porous solid, solid, semi-solid is suspended, and the like). It should be noted that more than one type of particle may be used in some materials of the invention, either in a mixture or in different layers. The use of "particles" may also imply agglomerates consisting of more than one particle or the like.

Used herein, the terms "superabsorbent" and "hydrogel" usually refers to absorbent materials capable of absorbing at least about 10 grams of aqueous liquid (for example, water, saline, or synthetic urine, the item number To-399105, available from PPG Industries) per gram of absorbent material, when they are immersed in the liquid for 4 hours, and the retention of the absorbed liquid under the force of compression to approximately 0,0352 kg/cm2(0.5 pounds per square inch).

Used herein the term "spunbond material mode of production" refers to material which is formed by extrusion of molten thermoplastic material in the form of continuous filaments from a variety of fine, usually circular capillaries with a certain diameter extrudable thread, which is then rapidly reduced, for example, by extrusion or other well known mechanisms spunbond production method. The production of non-woven meshes spunbond production method is illustrated in patents such as Appel (Appel) and others, U.S. patent n the measures 4340563.

Used herein, the term "material obtained aerodynamic method from the melt (the blowing of the melt)" means a material having fibers that are formed by extruding molten thermoplastic material through a number of fine, usually circular capillaries of a Spinneret in the form of molten fibers in high-velocity gas (e.g. air) stream which pulls the fibers of molten thermoplastic material, reducing their diameter. Then out of the melt fibers carry high-speed gas stream and precipitated on the collecting surface, forming webs of randomly placed fibers. The process of blowing of the melt is well known and described in various patents and publications, including the report of the research laboratory of the U.S. Navy (NRL) 4364, "Manufactory of Super-Fine Organic Fiber" ("the Production of high quality organic fibers") Vhavenda (V.A.Wendt), Elona (E.L.Boone) and Kdeplasma (C.D.Fluharty); NRL report 5265, "An Improved Device for the Formation of Thermoplastic Fiber" ("Improved apparatus for forming high-quality thermoplastic fibers") Kudlien (K.D.Lawrence), Rutulis (R.T. Lukas) and Jiang (J.A.Young); and U.S. patent number 3849241, issued November 19, 1974 Buntine (Buntin) and others, which are incorporated herein by reference.

As used here, the term "fiber" refers to a basic solid form, the usual semi-crystalline, characterized by a relatively high strength and extremely high ratio of length to diameter, such as several hundred to one. Examples of natural fibers are wool, silk, cotton and hemp. Examples of synthetic fibers include viscose. Examples of synthetic fibers include extruded through the die plate polyamides, polyesters, polyacrylates and polyolefins.

As used here, the term "aerodynamic styling", "air laid", "formed aerodynamic way," "aerodynamic shaping" and the like refers to a usually well-known processes, which may be formed from a fibrous nonwoven layer by capturing small fibers by an air stream. In a typical process the bundles of small fibers having a normal length in the range from about 3 to about 19 millimeters (mm), separated and grab at the air, and then precipitated on the forming screen, usually with the help of a vacuum supply. Besieged random fiber can then be glued to each other using, for example, hot air or spray glue. Methods aerodynamic styling indicate, for example, in U.S. patent 4640810 Laursen (Laursen) and other

The present invention provides a multi-component absorbent structure which includes the t first absorbent liquid component is usually in the form of the associated flexible matrix, including stratified layers of fibrous material on or near the surface of the multi-component structure, which, perhaps, is subjected to a selection or maintaining in the liquid. This design provides several advantages. The first absorbent liquid component facilitates the passage of selection through the surface of the structure so that the selection is drawn into the underlying absorbent material where it is absorbed. As such, the first absorbent liquid component contributes to the speed at which the allocation is absorbed. Secondly, the first absorbent liquid component helps to prevent any reverse flow of excretion once it is drawn through it. Thus, multi-component absorbent liquid structure to help stabilize the liquid in the structure and reduces leakage.

In addition, because the selection is not able to move back through the surface of the structure, the structure remains dry to the touch, and the main part of the allocation is not able to migrate to the surfaces, which can be in contact with the first absorbent liquid component. For example, the absorbent structure reduces reverse flow or re-wetting of the upper surface of the absorbent structure, which can come into contact with the skin is the user thus preventing skin irritation wearing.

Also the General configuration of the multi-component absorbent structure and the relative proportions of the volume and/or surface area components help to ensure the best functioning and best convenience products for the user. For example, it was found that the ratio of the area of the second absorbent liquid component to the square of the first absorbent liquid component preferably is more than about a 3.5 to 1 and that the ratio of the volume of the second absorbent liquid component to the volume of the first absorbent liquid component preferably is more than about 10 to 1 - especially when the full amount of a fluid-absorbing structure is less than approximately 130 cm3. Preferably, the full amount of a fluid-absorbing structure is less than approximately 100 cm3. More preferably, the full amount of a fluid-absorbing structure is less than about 50 cm3. Even more preferably, the full amount of a fluid-absorbing structure is less than approximately 30 cm3. Most preferably, the full amount of a fluid-absorbing structure is less than approximately 25 cm3.

Finally, as the main part of the selection is drawn in the second the absolute is baroudi liquid component and does not remain near the surface of the first absorbent liquid component, allocations are indeed "hidden" from the observations except for a small spot on the surface of the product. Essentially, the product is more aesthetically pleasing after the selection.

For example, it was found that when the components were placed in the relationship described above, the first absorbent liquid component holds less than approximately 30% of artificial menstrual fluid through, about 1 minute after the allocation of approximately 10 ml. Preferably, the retention rate of artificial menstrual fluid is less than about 25%, less than about 20%, or even less than about 15% after approximately 1 minute after the allocation of approximately 10 ml.

Cover or disguise stains, it was found that when the components were placed in the relationship described above, the first absorbent liquid component, preferably, covers or closes at least about 50% of the area of the spots of the second absorbent liquid component generated by the artificial menstrual fluid through, about 10 minutes after approximately 5 ml of selection introduced in the center of the first main surface of the first absorbent liquid component. The percentage of overlap of the spot or cover stains may be, at the ore, approximately, 70%, and may preferably be in the range of from about 75% to about 100% of the spot area in the second absorbent liquid component generated by the artificial menstrual fluid discharge through, about 10 minutes after allocation, amounting to approximately 5 ml, and injected into the center of the first main surface of the first absorbent liquid component.

The present invention provides an absorbent product, such as, for example, a sanitary napkin, which provides maximum protection, does not leak and remains dry to the touch, provides a better fit and, after separation, is more aesthetically pleasing than absorbent articles in accordance with previous technologies. Absorbent articles have improved absorbent structure, which was designed to achieve these improvements. In addition, the present invention includes a channel located around the inner part of the absorbent product. This channel helps to ensure elevated in the Central part of the device that provides the best fit for wearing articles.

The absorbent structure of the present invention includes a first absorbent liquid component, which is connected by a flexible matrix including the cabbage soup stratified layers of fibrous material. This first absorbent liquid component serves several purposes. Initially the first main surface of the first absorbent liquid component acts like a "distribution" or fast-absorbing layer to quickly absorb the liquid. Then subsequent layers in the first absorbent liquid component used for infiltration or transport fluid from the near surface layers in the inner and/or the lower layers of the first absorbent liquid component. During operation, fluid is transferred from the first absorbing liquid component in the second absorbent liquid component or absorbent inner part, where its store in the underlying absorbent material. In addition, as the fluid is quickly drawn into the inner part of the multi-component absorbent liquid structure, a top view of the product will usually show only the configuration of the spot, which looks like just a very small circle, thereby providing the user the feeling that the product is pure. Finally, as the fluid is stored in the second absorbent liquid component inside the structure, the surface is usually dry to the touch, and a smaller amount of liquid able to be in contact with the surface of the structure, has helped is I prevent skin irritation wearing.

Multi-component absorbent liquid structure used in the present invention, includes a first absorbent liquid component, which is connected by a flexible matrix including stratified layers of fibrous material and the second absorbent liquid component, which may be more traditional absorbent material such as a layer of fluff pulp sheet containing superabsorbent material, or a combination thereof.

Associated flexible matrix including stratified layers of fibrous material preferably has a relatively open layer in the uppermost or first main surface. Open the layer acts as a distribution layer. In addition, outdoor layer in the upper part helps to prevent reverse fluid flow, as soon as she was captured and absorbed by the structure, thereby providing a feeling of dryness, helping to prevent leakage and helping to reduce the possibility of irritation that occurs during reverse fluid flow and contact with the user of the product.

In addition, the associated flexible matrix including stratified layers of fibrous material, preferably, includes an absorbent layer to help draw the fluid from the open layer through the layers and into the inner portion of the first absorbent LM the bone component and, ultimately, in the absorbent article so that the main part of the liquid was absorbed and stored second absorbent liquid component.

Although the authors do not would like to adhere to a particular theory of action, I believe that the first absorbent liquid component provides the distribution of voids, which are smaller near the second main surface and larger near the first main surface. This difference in the sizes of the voids are believed to provide a stepped or gradient distribution, which helps to move fluid from the first main surface to the second major surface. As an example of the void next to the first main surface can be approximately 1.25 times greater than the void next to the second main surface. This difference in size may be in the range from approximately a 1.25 to 1 to approximately 3 to 1.

In one aspect of the invention, the first absorbent liquid component can provide the distribution of voids, which are smaller near the second main surface than the voids in the second absorbent liquid component adjacent to the second main surface. I believe that this configuration reduces the migration of liquid from the first absorbent W is dcost component to the second absorbent liquid component. Although the inventors do not wish to adhere to a particular theory of action, I believe that the difference in size of the voids between the two components causes a greater distribution of fluid across the second main surface of the first absorbent liquid component before transferring it to the second absorbent liquid component. I believe this type of operation is preferred when the second absorbent liquid component includes superabsorbent material that has a relatively low rate of absorption.

In another case, the first absorbent liquid component may be configured to provide a distribution of voids, which are the same size or slightly larger near the second main surface than the voids in the second absorbent liquid component adjacent to the second main surface. Although the inventors do not wish to adhere to a particular theory of action, I believe that the difference in size of the voids between the two components causes the movement of fluid directly and quickly in the second absorbent liquid component. I believe that such action is preferred when the second absorbent liquid component includes a material that has a relatively high speed vetiva the Oia.

When a fluid-absorbing structure is included in the absorbent product, such as, for example, sanitary napkin, at least part of the first absorbent liquid component, preferably, is located in the Central region (for example, along the longitudinal axis) of the product that is closest to the user. In this position, the first absorbent liquid component operating in a way that creates a raised center of the product, therefore providing improved adherence of the product to the user. This improved the fit may be enhanced by use of the channel located around the inner part of the product (inner part including a first absorbent liquid component). This channel reduces the volume of the product in areas where the product is mainly not used, further increasing the raised center of the product and, therefore, providing additional best fit the product to the user. The channel also helps to prevent the leakage of any liquid absorbed in the absorbent product.

Now reference is made to the drawings which illustrate several different embodiments of the invention for a typical absorbent articles of the present invention. This specific typical embodiments of the invention are sanitary napkins and the and the female strip, which include the above-described absorbent liquid structure. Of course, it should be understood that many absorbent products can successfully use this absorbent liquid structure

In Figures 1A-C show typical feminine pad or sanitary napkin 110, which is a strip type Maxi large capacity, which includes the wings. As shown in Figures 1A and 1B, the female strip 110 includes a top or upper layer 112, which may be a film, nonwoven material, or a combination thereof. The gasket also includes a separator or the wrong layer 114 made from breathable polymer or plastic film, which can be configured to have the flaps or wings extending outward from the Central part of the strip. The gasket also includes a fluid-absorbing structure 115, which includes a second absorbent liquid component 116 and the first absorbent liquid component 118, which is connected by a flexible matrix including stratified layers of fibrous material. This first absorbent liquid component 118 is located under the film cover layer 112 and over the second absorbent liquid component 116. As discussed earlier, the first absorbent liquid component 118 will act to draw W dcost through the coating material 112 in the first absorbent liquid component 118 and the second absorbent liquid component 116, where it is absorbed and remains.

Women's strip 110 may also include other details, such as adhesive material for service 120 to hold the gasket in place, the detachable strip 122 that covers the adhesive 120, the cloth layer 124 is below a fluid-absorbing structure 115 to facilitate the absorbency and embossed sections 126 in the second absorbent liquid component 116 to selectively retract and store the liquid in a desired place. In some embodiments of the invention assume that the tissue layer 124 may be located between the first absorbent liquid component 118 and the second absorbent liquid component 116.

Women's strip 110 can also include a channel 128, which is located in the inner part of the female strip 110 and still surrounds the first absorbent liquid component 118. As previously discussed, the channel 128 contributes to the creation of the female strip 110, which fits better than the usual female strip. A channel can be in the second absorbent liquid component and may overlap at least part of the periphery of the first absorbent liquid component.

Figure 2 show the standard feminine pad or sanitary napkin 210, which illustrates the design of a thin type and also includes krylack is. Women's strip 210 includes a covering layer 212, which may be a film, nonwoven material, or a combination thereof. The gasket also includes a separator or the wrong layer 214 made from breathable polymer or plastic film, which can be configured to have the flaps or wings extending outward from the Central part of the strip.

The gasket also includes a fluid-absorbing structure 215, which includes the second absorbent liquid component 216 and the first absorbent liquid component 218, which is connected by a flexible matrix including stratified layers of fibrous material. This first absorbent liquid component 218 is located under the film cover layer 212 and over the second absorbent liquid component 216. As discussed earlier, the first absorbent liquid component 218 operates in such a way as to draw the liquid through the coating 212 for the first absorbent liquid component 218 and the second absorbent liquid component 216, where it is absorbed and remains.

Women's strip 210 may also include other details, such as adhesive material for clothes 220 to hold the gasket in place, the detachable strip 222 covering the adhesive 220, the cloth layer 224 below the absorbent liquid, p is ctory 215, to promote absorbency, as well as embossed sections 226 in the second absorbent liquid component 216 to selectively retract and store the liquid in a desired place. In some embodiments of the invention assume that the tissue layer 224 may be located between the first absorbent liquid component 218 and the second absorbent liquid component 216.

Women's strip 210 can also include a channel 228, which is located in the inner part of the female strip 210 and still surrounds the first absorbent liquid component 218. As previously discussed, the channel 228 contributes to the creation of the female strip 210, which fits better than the usual female strip. A channel can be in the second absorbent liquid component and may overlap at least part of the periphery of the first absorbent liquid component.

Figures 3A-demonstrate typical feminine pad or sanitary napkin 310, which illustrates the construction of the "ultra-thin" style and also includes wings. Women's strip 310 includes a covering layer 312, which may be a film, nonwoven material, or a combination thereof. The gasket also includes a separator or the wrong layer 314 made from breathable polymer or plastic film that can be MSE is figuerora so, to have the flaps or wings extending outward from the Central part of the strip.

The gasket also includes a fluid-absorbing structure 315, which includes a second absorbent liquid component 330 and the first absorbent liquid component 318, which is connected by a flexible matrix including stratified layers of fibrous material. This first absorbent liquid component 318 is located under the film coating 312 and on the second absorbent liquid component 330.

In this embodiment of the invention the second absorbent liquid component 330 may be a thin sheet of material, superabsorbent granules. The second absorbent liquid component 330 may be wrapped or surrounded by a layer of fabric or inserted between layers of thin fabric. Assume that the second absorbent liquid component 330 in this "ultra-thin" design may be replaced by a large piece of material used as the first absorbent liquid component 318.

Women's strip 310, shown in Figures 3A-b may also include an adhesive material 320 and detachable strip 322. Finally, the female strip 310 can also include a channel 328, located in the inner part of the female strip 310. A channel can be in the second absorbent liquid is ity component and can overlap, at least part of the periphery of the first absorbent liquid component.

Figures 4A-demonstrates a typical feminine pad or sanitary napkin 410, which illustrates a structure of type "Maxi" without wings. Women's strip 410 includes a top or upper layer 412, which may be a film, nonwoven material, or a combination thereof. The gasket also includes a separator or the wrong layer 414 of breathable polymer or plastic film. The gasket also includes a fluid-absorbing structure 415, which includes a second absorbent liquid component 416 and the first absorbent liquid component 418, which is connected by a flexible matrix including stratified layers of fibrous material. This first absorbent liquid component 418 is located under the membrane covering layer 412 and on the second absorbent liquid component 416.

Women's strip 410 also includes an adhesive material 420, detachable strip 422, which protects the adhesive 420, fabric 424, embossed section 426 and the insulating layer 432 around the outer part of the strip 410. Finally, the female strip 410 also includes a channel 428 located in the inner part of the female strip 410. As can be seen in Figure 4B, the channel 428, however, is not completely enclosed in a region of the strip 410, nigeriadaily absorbent liquid component 418. A channel can be in the second absorbent liquid component and may overlap at least part of the periphery of the first absorbent liquid component.

Figures 5A-C show a typical feminine pad or sanitary napkin 510, which illustrates the construction of the "thin" type without wings. Women's strip 510 includes a top or upper layer 512, which may be a film, nonwoven material, or a combination thereof. The gasket also includes a separator or the wrong layer 514 of breathable polymer or plastic film. The gasket also includes a fluid-absorbing structure 515, which includes a second absorbent liquid component 516 and the first absorbent liquid component 518, which is connected by a flexible matrix including stratified layers of fibrous material. This first absorbent liquid component 518 is located under the film coating 512 and above the second absorbent liquid component 516.

Women's strip 510 also includes adhesive material 520, detachable strip 522 covering the adhesive 520 fabric 524, embossed section 526 and the insulating 532 around the outside of the gasket 510. Finally, female gasket 510 also includes a channel 528, located in the inner part of the female strip 510. As can be seen in Fig is re 5B channel 528, however, it is not completely enclosed in a region of the gasket 510 containing the first absorbent liquid component 518. A channel can be in the second absorbent liquid component and may overlap at least part of the periphery of the first absorbent liquid component.

Referring now to Figures 6A-b and 7a-b, the advantages of having the first absorbent liquid component, which is connected by a flexible matrix including stratified layers of fibrous material, and a second absorbing liquid component in an absorbent product will be shown in connection with two different types of women strip.

Figure 6A shows a feminine pad or sanitary napkin 610 having a non-woven coating layer 612 and the separating layer of thermoplastic film 614. The gasket has a fluid-absorbing structure 615, which includes a second absorbent liquid component 616, the first absorbent liquid component 618 and possibly the underlying layer of absorbent material, such as, for example, a sheet of fabric 617. The first absorbent liquid component 618 is an associated flexible matrix including stratified layers of fibrous material, having a first main surface a and the second main surface 618b. Gasket 610 also includes an adhesive 620, the Department is appropriated strip 622, channel 628 and an insulating layer 632.

As shown by the arrow, the liquid discharge 634, in this case, the menstrual flow is delivered to the pad 610. Menstrual flow 634 pass through the coating 612 and come into contact with the first main surface a first absorbent liquid component 618. Relatively open or intermediate layers adjacent the first major surface a first absorbent liquid component 618 act as distributing layer, allowing rapid absorption of the liquid. The inner layers of the first absorbent liquid component 618 act to pull menstrual flow 634 through the first absorbent liquid component 618 and the inside of the second absorbent liquid component 616, and possibly the underlying layer 617.

As shown in Figure 6b, menstrual flow 634 absorbed by the second absorbent liquid component 616, and possibly in the underlying layer 617, but generally there is reverse flow through the first absorbent liquid component 618. If strip show from above, it would seem that only a small part of a strip 610 was exposed to menstrual blood 634, which makes the gasket 610 more aesthetically pleasing. Furthermore, since the menstrual flow 634 does not flow back through the first absolute is baroudi liquid component 618, floor 612 feels dry to the touch and achieved minimal contact with menstrual blood 634 with the skin of the user, thus decreases the possibility of skin irritation.

Figures 7a-b are similar to figures 6A-b, except that the film coating 712 is used instead of the non-woven cover. Feminine pad or sanitary napkin 710 includes a separating layer of plastic film 714. The gasket has a fluid-absorbing structure 715, which includes a second absorbent liquid component 716, the first absorbent liquid component 718 and possibly the underlying layer of absorbent material, such as, for example, a sheet of fabric 717. The first absorbent liquid component 718 is an associated flexible matrix including stratified layers of fibrous material, having a first main surface a and the second main surface 718b. The gasket 710 also includes an adhesive 720, detachable strip 722, channel 728 and the insulating layer 732.

In addition, when menstrual periods 734 come to the strip 710, menstrual periods 734 pass through the coating 712 and come into contact with the first absorbent liquid component 718, which then pulls menstrual periods 734 through the first absorbent liquid component 718 and the second absorbent liquid is component 716 and, perhaps in the underlying layer 717.

The first absorbent liquid component can have different layers selected based on the desired characteristics of the absorbent product. As discussed earlier, the first absorbent liquid component preferably has an open upper layers or layer, which acts as a distributing layer and helps to prevent reverse flow of fluid as soon as she was captured and absorbed by the product. In addition, the first absorbent liquid component preferably includes transferring or absorbing layer.

Many different types associated flexible matrices, including stratified layers of fibrous material, can be used as the first absorbent liquid component. Examples of suitable materials that are useful in the present invention include several multi aerodynamically laid materials, available from Buckeye Technologies, Inc. (Memphis, Tennessee). One such material includes aerodynamically formed of a multilayer material consisting of a complex of the polyester (PET) fibers, fluff pulp fibers and fibers chemically modified cellulose that form on the media from a sheet of fabric, which is then connected by a combination of bicomponent binder fiber from PET and pole Elena and emulsion latex-based copolymer of ethylene and vinyl alcohol. To help ensure mechanical integrity and stabilization, can be used binders. Binders include fiber, liquid or other binders that can be thermally activated. Desirable binder fibers include those that have a relatively low melting point, such as fibers made from polyolefins. Desirable are fibers having a lower melting point polymers such paired and two fibers. Fibers having a lower melting point polymers generally referred to as fusible fibers". Under the "polymers having a lower melting point," you see those that have a glass transition temperature less than about 175°C. it Should be noted that the absorbent texture of cloth can be modified from soft to hard by choosing the glass transition temperature of the polymer. Typical binder fibers include conjugate fibers of polyolefins, polyamides and polyesters. Typical binder fibers include conjugate fiber of the coated core, available from KoSa Inc. (Charlotte, N.C.) under the designation T-255 (including A) and the designation T-256 or Copolyester (complex copolyester), although many suitable binder fibers known in the art, and they are available from many manufacturers, t is such as Chisso and Fibervisions LLC of Wilmington, The Delaware. KoSa has developed a suitable binder fiber from complex sobolifera using the structure of the core-shell and is known under the designation T (low-melting copolymer PET). Suitable liquid binder is KYMENE® 557LX, available from Hercules Co. from Wilmington, Delaware. Other suitable liquid binders include polymeric emulsion of a copolymer of ethylene and vinyl acetate sold by National Starch and Chemical Company (Bridgewater, N.J.) under the trademark series DUR-O-SET® ELITE® (including ELITE® 33 and ELITE® 22). Air Products Polymer and Chemicals sells other suitable binder fibers called AIRFLEX®.

Synthetic fibers include those made from polyamides, polyesters, viscose, polyacrylates, superabsorbents, regenerated cellulose TENCEL® and any other suitable synthetic fibers known in the art. Synthetic fibers may also include kosmotrope for the destruction of the product.

Many polyolefins are available for fiber production, for example polyethylene, such as ASPUN® A from Dow Chemical, linear low density polyethylene, linear low density polyethylene 2553 and 25355 and high density polyethylene 12350 are such suitable polymers. These polyethylene have a flow velocity of the melt, respectively, approximately, 26, 40, 25 and 12. Obrazowe the fiber polypropylene include ESCORENE polypropylene® PD 3445 Exxon Chemical Company and PF304 Montell Chemical Co. Many other polyolefins are also available. Particularly preferred materials for this application include polyesters, which can lie in an interval of size or denier of 3 to 25 denier and have various types of cross sections, including a circle, a polygon, to be spiral-shaped, etc. Such fibers developed KoSa, Inc. with long-wettable coating and is known under the designation denier fibers, followed by the type of polymer and the cross-section. Examples include 8 dpf (denier per fiber), T-224 (vysokopolie); 8 dpf, T-224 (triangular); 15 dpf T-224 (round); 10 dpf T-224 (round); 6 dpf T-224 (round) and 3 dpf T-224 (round).

Natural fibers include wool, cotton, flax, hemp and wood pulp. Types of wood pulp include standard soft wood reposeidas brands, such as CR-1654 (US Alliance Pulp Mills, Cuza, Alabama). Cellulose can be modified to enhance the inherent characteristics of fibers and their machinability. The crimp may be imparted to the fibers by methods including chemical treatment or mechanical torsion. The tortuosity usually give before binding or stiffening. Cellulose can be given rigidity by using cross-linking agents such as formaldehyde or its derivatives, glutaric aldehyde, EPI is loricrin, metilirovannye compounds such as urea or urea derivatives, dialdehyde, maleic anhydride, not metilirovannye derivatives of urea, citric acid or other polybasic carboxylic acids. Some of these agents are less preferred than others, due to the fact that affect the environment and health. Cellulose can also be made more rigorous using heating or treatment with alkali, such as mercerization. Examples of these types of fibers include NHB416, which is chemically cross-linked cellulosic fibers from southern soft wood, which has increased the degree of humidity, available from Weyerhaeuser Corporation of Tacoma, Washington. Other used cellulose are loosened pulp (NF405) and nerastrachennuyu cellulose (NB416) from Weyerhaeuser. HPZ3 from Buckeye Technologies, Inc. from Memphis, Tennessee has a chemical treatment, which creates a tortuous and twisting in addition to providing additional rigidity in dry and wet condition and elasticity to the fibers. Other suitable cellulose is a cellulose from Buckeye HPF2, and another is the IP SUPERSOFT® from International Paper Corporation. Suitable viscose fibers are fibers of 1.5 denier Merge 18453 from Tencel Incorporated from Axis, Alabama.

As a more detailed example is obecny material, suitable for first absorbent liquid component, available from Buckeye Technologies, Inc. under the trade designation Buckeye Unicore 8001. This aerodynamically formed or aerodynamically stacked multilayer material may have a total weight of a unit area in the range of from about 120 to about 300 (preferably, between about 210 and 240) grams per square meter (g/m2) and the total density in the range of from about 0.06 to about of 0.10 grams per cubic centimeter (g/cm3). Examples of multi-layer materials can be upper or top layer is from about 25 to about 45 g/m2that contains fibers of polyesters, associated with latex, in the range of from about 6 to about 15 denier per fiber (dpf) and which, preferably, is approximately 20% of the total mass of a unit area of the layers in the first absorbent liquid component. Directly adjacent the layer may be from about 35 to about 70 g/m2and may contain cellulose fiber, United with a binder fiber. Cellulose can be mercerized cellulose, which is thermally bonded using a two-component binder fiber of the complex polyester and polyethylene. This layer may preferably faced the , approximately 30% of the total mass of a unit area of the layers. Multilayer material may include a layer that is from about 35 to about 100 g/m2and may include compressible cellulose and binder fiber of the same or similar type as in the adjacent layer. This other layer may be approximately 40% by weight of the total unit area of the layers. These layers can be formed on the fabric carrier or surrounded this fabric, which may be from approximately 10 to approximately 20 g/m2and may preferably be approximately 5% by weight of the total unit area of the layers.

Other examples of suitable associated flexible matrices, including stratified layers of fibrous material, which can be used as the first absorbent liquid component can be found in international application number WO 00/74620. In accordance with this publication, the terms "layers" and "layer" refers to a layered areas, which constitute a single structure. The layers in this single structure are not unit or pre-formed laminate layers forming a multilayer structure. Instead, a single structure is constructed by combining layers in a continuous way. Wind technology is described as a method for obyedinenie the layers of a single structure.

Another example of a suitable associated flexible matrix including stratified layers of fibrous material, which can be used as the first absorbent liquid component has two layers or layer. The first layer is aerodynamically stacked structure having a weight per unit area of about 50 g/m2containing 85 wt.% polyester fibers of 15 denier per filament, which is associated with about 15 wt.% conventional latex binder, suitable for personal hygiene items. The second layer is an aerodynamically stacked structure having a weight per unit area of about 150 g/m2and containing about 90 wt.% fluff pulp and about 10 wt.% bicomponent binder fiber comprising a core of a complex of the polyester and a sheath of polyethylene or similar polymer that softens or melts when heated to dry the latex binder and thermally activated binder fiber. These are specifically combined layers had a total thickness of about 1,6 mm.

The present invention is further illustrated by the following examples which in no way should be construed as imposing limitations on their scope. On the contrary, should the household is perfectly understandable, that you can refer to various other variants of the invention, modifications and equivalents, which, after describing here can be offered by specialists without deviating from the essence of the present invention and/or scope of the attached claims.

Examples

Example 1

In example 1 women's strip was tested to determine the effectiveness of sanitary napkins, using multi-component absorbent liquid structure compared to conventional shopping womens gasket. In this example, sanitary napkins, including multi-component absorbent liquid structure, denoted as GEM II. The same multi-component absorbent liquid structures were used as in the gasket type Maxi and laying a thin type.

Strip as "Maxi"and "thin" was a multi-component absorbent liquid structure in which the first absorbent liquid component has an area of approximately 38 square centimeters, and the second absorbent liquid component has an area of 131 square centimeter.

The first absorbent liquid component has a thickness of about 1.5 millimeters (0.15 cm), giving a calculated volume of approximately 6 cm3. Strip GEM II "Maxi" used the second absorbent of liquids the b component, formed from fluff pulp. This component has a thickness of about 8 millimeters (0.8 cm), giving a calculated volume of approximately 105 cm3. Strip GEM II "thin" used the second absorbent liquid component formed from fluff pulp. This component has a thickness of about 6 millimeters (0.6 cm), giving a calculated volume of approximately 79 cm3.

The first absorbent liquid component was represented by a material, available from Buckeye Technologies under the trade designation Unicore 8001. This material has a weight per unit area of about 230 g/m2with the capacity of absorption of the liquid, about 6 grams of liquid per gram of material. Gasket type "Maxi" second absorbent liquid component consisted of a layer of fluff pulp having a weight per unit area of about 662 g/m2and the capacity of absorption of the liquid, about 10 grams of liquid per gram of material. For gaskets thin type second absorbent liquid component was a layer of fluff pulp having a weight per unit area of about 397 g/m2and the capacity of absorption of the liquid, about 10 grams of liquid per gram of material.

Control commercial female strip gaskets were Laurier brand Soft Care as t is PA Maxi, and thin type. These gaskets are available in Malaysia from Kao Corporation. Generally speaking, these pads are the only absorbing liquid component, which can be described as fabric, wrapped around the inner part of the fluff pulp. The absorbent liquid component has a weight per unit area of about 519 g/m2for the product "Maxi" and approximately 323 g/m2for thin products. This absorbent liquid component is located between apertureand film coating and is impervious to the fluid in the rear insulating gasket.

Table 1 indicates the physical measurement and the test results for each of these six strips. Each of these six strips was tested for its adsorption capacity using the following test procedures with 10 cm3(˜10 ml) of water added to each strip Maxi, and 6 cm3(˜6 ml) of water added to each thin strip. The tests were carried out with the use of artificial menstrual fluid, as described in U.S. patent number 5833231, the content of which is incorporated herein by reference. A more detailed description of artificial menstrual blood below.

In the tests used test device, which consisted of: 1) block of Lucite&x000AE; and 2) a flat horizontal test surface. Figure 8 is a top view of the block of Lucite®. Figure 9 is a view in section of a block of Lucite®. Block 1200 has a base 1202, which protrudes from the bottom of the unit. The basis 1202 has a flat surface 1204, which is approximately the length 7,3025 cm (2,875 inches) and width 3,81 cm (1.5 inches), which forms the lower part of unit 1200. Oblong hole 1206 (approximate length 3,81 cm (1.5 inches) in width 0,635 cm (0.25 inch) is located in the center of the block and extends from the top of the block to the base block 1202. When the lower part of the holes 1206 is closed, the hole 1206 may contain more than approximately 10 cm3the fluid. Mark the passage 1210 indicates the volume of liquid, approximately 2 cm3. Through the funnel 1208 at the top of the unit load in the passage 1210, which is connected with an oblong hole 1206. The liquid poured into the funnel 1208, passes through the passage 1210 in the oblong hole 1206 and the sample test below the block.

Each sample was tested by placing it on a flat horizontal surface for testing and then laying flat protruding block on the top of the sample so that the long dimension of the oblong holes is parallel to the long dimension of the sample and was centered relative to the ends and sides of the sample. Mass unit was established which, about 162 grams so that the block was based on the structure with a pressure of about 7 grams/cm2(approximately 1 pound per square inch). Started a stopwatch when approximately ten (10) cm3for Maxi pads (or 6 cm3for thin and ultra thin pads) fluid was divided into the funnel pipette Repipet (catalogue number 13-687-20; Fischer Scientific Company) using a constant pressure. Liquid filled oblong hole of the block, and the clock was stopped when the meniscus of the liquid has reached the level of 2 cm3indicating that 8 cm3the liquid was absorbed.

In addition, were tested for re-hydration, using test re-wetting the filter paper to measure the amount of artificial menstrual blood in grams, which is released from the sample at a constant applied pressure of 1 psi (0.07 kg/cm2). Pre-weighed filter paper, such as 1001b Blotter is the trading name "Verigood", available from Fort James (Georgia Pacific), with offices in Atlanta, Georgia; or 100# Blotter - brand designation "Riegel", available from Sloan Paper Co., with offices in Roswell, GA, or their equivalent was placed on the sample. Then put uniform pressure 1 pound per square inch on Proclad is within three minutes. The pressure was removed and the wet filter paper was weighed to 0.01 grams. The number of artificial menstrual blood released from the sample on the filter paper was determined by subtracting the dry weight of the filter paper from the mass of moist filter paper.

The absorption capacity was determined by spreading an aqueous solution of the dye in the sample for testing until such time as the sample for testing did not begin to leak. The amount of fluid distributed at the point of leakage is the capacity of absorption. The equipment consisted of a system of peristaltic pumping tube pump (tube pump, tubing and capillary feeding needle cannula), section control, launches and stops the pump and timer, and a flat horizontal readout grid, which will sense the presence of liquid. The pump delivers the liquid up until the test is not fully saturated, and the liquid drips from the sample on the sensing grid. When this happens, the control section stops the pump and timer, and the amount of liquid is calculated by multiplying the distributed liquid (ml) time (in minutes).

To prepare for the test were prepared concentrated solution by dissolving 114 ml Blue Liquid Dye No. 357 (part number 00357) in 1000 ml±5 ml of distillirovannoi water. The solution for test was prepared by adding 30±1 ml of this concentrate to 3400±5 ml of distilled water. The dye comes Warner-Jenkinson Co., St. Louis, Missouri. The volume of liquid used for testing is 1000 ml, it is stored in a calibrated cylinder for 1000 ml

Automatic pump with positive consumption is used to pump the solution from a calibrated cylinder to the sample for testing, for example, a Masterflex pump (R), part number 826028, with a Masterflex pump head (R), part number 1034618 equipped with silicone tubing Masterflex (R) #14, part number 96410-14, all available from Cole-Palmer Instrument Co., Chicago, Illinois. The needle of the syringe for subcutaneous injection length of four inches (10.16 cm) or laboratory cannula, such as cannula stainless steel gauge 14 with luer-loc, part number BD1789 supplied by Becton Dickinson of Franklin lakes, new Jersey. The needle 14 gauge has the same internal diameter as the pipe, and additionally makes installation more hard, which facilitates support of the in-feed end equipment.

Automatic pump set to pump 15 ml±1 ml / min of a solution from the cylinder to the sample for testing after a period of preliminary pumping 10 minutes to remove air and heat pump to ensure a constant supply. The end of the needle support all stand, the core is placed a clamp to support the distribution end of the test. The height of the needle set to provide a gap of 3 mm between the end of the needle and turned to the body surface of the sample for testing. (If the sample for testing swells when it is wet, the tip height should be adjusted during the test to maintain a gap of 3 mm)

To determine the capacity of the sample for testing is placed in the center of the read mesh with the upward facing side surface facing to the body and oriented to receive fluid at a point representing the intersection of the longitudinal and transverse axes. Start the pump and timer and the test is complete when the liquid sample to be tested is moved to the reading grid and turns off the pump and timer. Then calculate the absorption capacity (ml per minute).

Artificial menstrual fluid used in the test was made in accordance with U.S. patent 5883231 of blood and egg white separation of plasma and red blood cells and protein separation on thick and the liquid portion, where "thick" means that it has a viscosity after homogenization above about 20 centipoise at 150 c-1by combining the dense part of the egg whites with the plasma and thorough mixing, and finally, the addition of red blood cells and new thorough mixing. In more detail the procedure consists of the following is relevant.

Defibrinating pork blood is separated in a centrifuge at 3000 rpm for 30 minutes, although other methods or speeds and times may be used if they are effective. Plasma was separated and stored separately, leucocytes film is removed and discarded, and the combined red blood cells are also stored separately. It should be noted that the blood must be processed in some way so that it could operate without binding. Specialists known various methods such as defibrinating blood removal collapsing fibrous materials, adding protivokashlevami chemicals and other means. Blood should be netvertibles to be used, and any acceptable method which achieves this without destroying the plasma and red blood cells.

Large chicken eggs, separated, yolks and halasa was thrown out and left the egg white. Egg protein was divided into thick and the liquid portion by passing the protein through a grid of nylon 1000 microns, about 3 minutes or more liquid part was thrown out. The dense part of the egg protein, which remained on the sieve was collected and transferred into the syringe 60 cm3which was then placed on a programmable syringe pump and homogenized contents of the displacement and re-filling five times. The number homogenizes the th controlled speed syringe pump, approximately 100 ml per minute, and the inner diameter of the tube, approximately 0,305 cm (0,12 inch). After homogenization dense part of the egg protein has a viscosity of about 20 centipoise at 150-1and then it was placed in a centrifuge and centrifuged to remove residual organic substances and air bubbles, at approximately 3000 rpm, about 10 minutes.

After centrifugation thick homogenized egg white, which contains ovomucin add in a packing container for transportation to 300 cm3FENWAL® using a syringe. Then 60 cm3plasma pig's blood type in a packing container for transportation FENWAL®. Packing container for transportation FENWAL® close all air bubbles are removed and it is placed in a laboratory mixer of Stomacher, where the contents stirred at normal (or average) speed, about 2 minutes. Packing container for transportation FENWAL® then remove from the mixer, add 60 cm3red blood cells of pig blood and the contents of the hand-mixed, about 2 minutes or until until the content becomes homogeneous. The hematocrit of the final mixture should show the content of red blood cells, approximately 30 wt.% and usually should be, at the very measures which, within the interval 28-32 wt.% for the artificial menstrual blood, made in accordance with this example. The number of egg protein is approximately 40 wt.%.

Ingredients and equipment used to obtain the artificial menstrual blood, are easily accessible. Below is a list of sources for used items, although, of course, other sources may be used provided that they are approximately equivalent.

Blood (porcine): Cocalico Biologicals, Inc., 449 Stevens Rd., Reamstown, PA 17567.(717) 336-1990.

Packing container for transportation FENWAL®, 300 ml, with connector, code 4R2014: Baxter Healthcare Corporation, Fenwal division, Deerfield, Illinois 60015.

Programmable syringe pump Harvard Apparatus, model number 55-4143: Harvard Apparatus, Cayc NATICK, Massachusetts 01760.

Laboratory mixer of Stomacher 400, model number VA 7021, serial number 31968: Seward Medical, London, England, UK.

The mesh 1000 microns, the product number CMN-1000-B: Small Parts, Inc., Mail box 4650, Miami lakes, Florida 33014-0650,1-800-220-4242.

Device for measuring hematocrit Hemata Stat-II, serial Number 1194Z03127: Separation Technologies, Inc., 1096 Rainer Drive, Lamount Sprint, Florida 32714.

Generally speaking, the thickness or gauge of the materials were measured at 3.5 g/cm2(of 0.05 pounds per square inch) gauge volume Starret or other Oba is s ' meter volume. The results of the measurements are expressed in millimeters. These amounts for the various components were calculated from measurements of length, width and thickness. These volumes were expressed in cubic centimeters (cm3).

As can be seen from the results, gaskets were compared by the values of the absorption capacity and absorption capacity. However, strip, including multi-component absorbent liquid structure, showed improved rewetting compared with commercial strips.

Table 1
Method/productStrip MaxiThe strip is thin
GEM IILaurierGEM IILaurier
Width (mm)Environments.93,873,2for 93.473,4
SKO0,60,50,70,7
Length (mm)Environments.230,0219,8230,1216,1
SKO0,70,80,30,6
Weight (g)Environments.11,88,88,37,4
SKO0,40,10,10,3
Thickness (mm)Environments.9,17,98,36,5
STP 260-WSKO0,20,20,30,5
Speed10 mlEnvironments.10,8114--
absorption (sec) STM 2447fluidly.SKO1,21,36,35,6
6 ml fluidEnvironments.-
&x0200A; SKO0,90,6
Test rewetting STM.2440 previously STP.682-WEnvironments.0,31,40,40,9
SKO0,10,030,10,04
The absorption capacity (ml)Environments.105,2br135.890,293,0
STM.2434 previously STP.191-WSKO1,45,56,64,2

Example 2

In example 2 was tested two different ultra-thin female strip to determine the effectiveness of such absorbent articles containing multi-component absorbent liquid structure, compared with conventional selling women's strip. In this example, one spacer comprising multi-component absorbent liquid structure, identified as Goodfeel II, while ordinary commercial women's strip was ultra-thin strip Whisper Whisper from (Thailand) table 2 provides data specific measurements for each of the gaskets.

Strip Goodfeel II had a multi-component absorbent liquid structure in which the first absorbent liquid component has an area of approximately 38 square centimeters, and the second absorbent liquid component has an area of approximately 131 square centimeter.

The first absorbent liquid component has a thickness of about 1.5 millimeters (0.15 cm), giving a calculated volume of approximately 6 cm3. Strip Goodfeel II used the second absorbent liquid component formed from fluff pulp. This component has a thickness of about 1,7 mm (0.17 inches), giving the estimated volume of approximately 22 cm3.

The first absorbent liquid component was material, available from Buckeye Technologies, Inc. under the trade designation Unicore 8001. This material has a weight per unit area of about 230 g/m2and the capacity of absorption of the liquid, about 6 grams of liquid per gram of material. The second absorbent liquid component was a layer of fluff pulp, comprising approximately 0.25 g of the superabsorbent material. The second absorbent liquid component had a lot of the unit, approximately 213 g/m2and the capacity of absorption of the liquid, about 10 grams of liquid per gram of material.

Control trading women about the Lada was a ultra-thin gasket brand Whisper, supplied in Thailand Procter & Gamble Company. Generally speaking, these pads have an absorbent liquid component, which can be described as having a first non-woven distributing/carrying layer deposited on the layer of spunbond method of production or similar non-woven layer. This layer had a total thickness of about 0.75 mm (0,075 cm)and a length of about 140 cm and a width of approximately 60 cm Strip Whisper had a second absorbent layer consisting of fluff pulp and superabsorbent material. This second layer had a thickness of approximately 1.5 mm (0.15 cm)and a length of approximately 195 cm and a width of approximately 65 see the

Each of the strips was tested for its absorption rate, using the test procedure described above. In addition, were tested for re-hydration, using the test procedure for re-hydration, as described above. Finally, each strip was tested for its capacity of absorption, using the test procedure on the capacity of the absorption described above. As you can see from the results, gaskets were comparable to the values of the absorption capacity. However, the gasket Goodfeel II absorbed liquid with a much higher speed and showed superior resistance to repeated wetting compared to the shopping strip.

Table 2
Method/productGoodfeel IIWhisper
Width (mm)Environments.84,990,8
SKO1,20,5
Length (mm)Environments.235,5226,2
SKO0,70,8
Weight (g)Environments.6,75,3
SKO0,10,1
Thickness (mm)Environments.the 3.82,8
STP 260-WSKO0,10,1
The speed of absorption (sec)Environments.8,024,7
6 ml of fluid. STM.2447 previously STP 89-WSKO1,52,2
Test re - Environments.1,72,1
moisture (g) STM.2440 previously STP 682-WSKO0,20,2
The absorption capacity (ml)Environments.108,1127,7
STM 2434 previously STP 191-WSKO1,36,0

Example 3

In example 3 was tested two different ultra-thin sanitary towels, superabsorbent granules to determine the effectiveness of such absorbent articles containing multi-component absorbent liquid structure, compared to conventional commercial female gasket. In this example, one spacer comprising multi-component absorbent liquid structure, identified as C-Ultrathin, while regular trade women's strip was ultra-thin strip Whisper brand available in Hong Kong from Procter & Gamble Company. Table 3 summarizes the specific measurements for each of the gaskets.

The gasket C-Ultrathin had aperturevalue film coating layer Guial supplied Guial Film from France, and impervious to liquids wrong layer. Gasket included multi-component absorbent liquid structure in which the first absorbent liquid component has an area of 38 square centimeters, and the second absorbent liquid component has an area of approximately 131 square centimeter.

The first absorbent liquid component has a thickness of about 1.5 millimeters (0.15 cm), giving a calculated volume 6 cm3.

The first absorbent liquid component was material, available from Buckeye Technologies under the trade designation Unicore 8001. Materially the mass of a unit area, approximately 230 g/m2and the capacity of absorption of the liquid, about 6 grams of liquid per gram of material. The second absorbent liquid component was a layer comprising about 60 wt.% fluff pulp and about 40 wt.% superabsorbent. The second absorbent liquid component has a weight per unit area of about 356 g/m2and the capacity of absorption of fluid, approximately 40 grams of liquid per gram of material.

Ultra-thin trading female strip Whisper brand also had aperturevalue film coating. Generally speaking, these pads have an absorbent liquid component, which can be described as having a first layer aerodynamic styling applied to the layer of spunbond method of production or similar non-woven layer. This layer had a total thickness of about 0.75 mm (0,075 cm)and a length of about 140 mm and a width of approximately 60 mm Gasket Whisper had a second absorbent layer consisting of fluff pulp and superabsorbent material. This second layer was wrapped in a thin material produced by the aerodynamic method, and had a thickness of approximately 1.5 mm (0.15 cm)and a length of about 175 mm and a width of approximately 65 mm

Each of the strips was tested for its adsorption capacity, x is tion of re-wetting and absorption capacity, using the test procedure described above. As you can see from the results, gaskets were comparable to the values of the absorption capacity. However, the gasket C-Ultrathin absorb liquid with a much higher speed and showed superior resistance to repeated wetting compared to the shopping strip.

Table 3
Method/productC-UltrathinWhisper
Width (mm)Environments.145,4155, 2mm
SKO0,80,5
Length (mm)Environments.261,3221,4
SKO0,50,6
Weight (g)Environments.10,65,8
SKO0,20,0
Thickness (mm)Environments.the 3.83,0
STP 260-WSKO0,10,2
The speed of absorption (sec)Environments.7,924,3
6 ml of fluid. STM.2447 previously STP 89-WSKO0,31,6
Test re - Environments.0,011,9
moisture (g) STM.2440 previously STP 682-WSKO0,010,1
The absorption capacity (ml)Environments.213,9108,9
STM 2434 previously STP 191-WSKO4,50,7
The length of the spot after testingEnvironments.55,065,0
on rewetting (mm)SKO0,50,7
The width of the spots after the testEnvironments.62,0100,0
on rewetting (mm)SKO1,00,7

Example 4

This example illustrates how a relatively large proportion of artificial menstrual fluid migrates quickly (after 1 minute) from the first absorbing liquid component in the second absorbent liquid component of multi-component absorbent liquid structure.

The first absorbent liquid component is in the form of the associated flexible matrix including stratified layers of fibrous material. Two different types of materials used for the first absorbent liquid component to illyustrirovali, that is useful for certain types of multi-layered or stratified structures.

The second absorbent liquid component was a layer comprising about 60 wt.% fluff pulp and about 40 wt.% superabsorbent. The second absorbent liquid component has a weight per unit area of about 356 g/m2the capacity of absorption of fluid, approximately 16 grams of liquid per gram of material and area of approximately 131 square centimeter.

One material used for the first absorbent liquid component, represented a material, available from Buckeye Technologies under the trade designation Unicore 8001. This material has a weight per unit area of about 230 g/m2and the capacity of absorption of the liquid, about 6 grams of liquid per gram of material. This material has an area of 38 square centimeters. The first absorbent liquid component has a thickness of about 1.5 millimeters (0.15 cm), giving a calculated volume 6 cm3. This material is listed in Tables 4 and 5 as "material #1".

Another material used for the first absorbent liquid component has a weight per unit area of about 200 g/m2. This material is listed in Tables 4 and 5 as "material #2" and includes the first layer, the obtained aerodynamic SPO is obom, having a weight per unit area of about 50 g/m2. The first layer contained approximately 85 wt.% complex polyester fibers of 15 denier per filament, connected together with about 15 wt.% conventional latex binder, suitable for personal hygiene items. Material #2 included a second layer obtained by the aerodynamic method, having a weight per unit area of about 150 g/m2. This second layer contained about 90 wt.% fluff pulp and about 10 wt.% bicomponent binder fiber comprising a core of a complex of the polyester and a sheath of polyethylene polyethylene or similar material which softens or melts when heated dry latex binder and thermally activated binder fiber. This specific combination of layers has an area of 38 square centimeters and a thickness of approximately 1,6 mm (0,16 cm), giving a calculated volume of about 6.1 cm3.

In each trial, each component of a fluid-absorbing structure weighed and the weight recorded. The structure was re-assembled. Approximately 10 ml of liquid artificial menstrual flow was applied in the Central part of the first main surface of the first absorbent liquid component structures identified above. After, around the o 60 seconds (1 minute) components were separated and re-weighed. The difference between the mass of the wet and the weight in dry state was represented by the amount of liquid held by this component after a 60-second interval.

The amount of fluid in each of the components after one minute was measured and used to calculate the percentage. The results are shown in Table 5.

Table 5
MaterialThe total amount of liquid
Material # 1Environments.10,91
(grams)SKO0,46
Material #2Environments.10,69
(grams)SKO0,05
MaterialThe percentage coverageThe percentage of the first componentThe percentage of the second component
Material # 1Environments.0,2019,380,5
SKO0,07the 1.44the 1.44
Material #2Environments.0,2079,9
SKO0,041,091,06

Although the description of the present invention mainly belonged to female spacers, the present invention can also be used in other absorbent products such as diapers and items to protect against incontinence. Essentially the present invention has many applications, and provides a significant improvement compared to previous absorbent products in terms of protection, leakage and convenience for the user.

1. Multi-component absorbent liquid structure, including:

the first absorbent liquid component comprising an associated flexible matrix including stratified layers of fibrous material, and the first absorbent liquid component has a first main surface, a second main surface, the first full square, and the first volume, and

the second absorbent liquid component comprising a layer of different absorbent liquid material adjacent to the second major surface of the first absorbent liquid component, and the second absorbent liquid component has a second full size and a second volume such that the ratio of the second area to the first is th of the total area is more than 3.5 to 1, the ratio of the second volume to the first volume is more than 10 to 1, and the full amount of a fluid-absorbing structure is less than 130 cm3.

2. A fluid-absorbing structure according to claim 1, where the first absorbent liquid component includes layers aerodynamically laid fibers of staple length, aerodynamically laid fibers made of fluff pulp, aerodynamically laid fibers chemically modified cellulose, hydrogel fibers and a combination thereof.

3. A fluid-absorbing structure according to claim 2, where the first absorbent liquid component also includes materials from the particles.

4. A fluid-absorbing structure according to claim 2, where the first absorbent liquid component associated with the use of thermally bonding fibers, adhesives, thermal point bonding, mechanical weave, latex emulsions, and combinations thereof.

5. A fluid-absorbing structure according to claim 1, where the second absorbent liquid component is selected from structures containing hydrogel structures of fluff pulp mainly homogeneous structures obtained aerodynamic method.

6. Multi-component absorbent liquid structure, including:

the first absorbent liquid component comprising an associated flexible matrix including stratified layers volokna the second material, the first absorbent liquid component has a first main surface, a second main surface, the first full size and the first size of the absorption liquid, and

the second absorbent liquid component comprising a layer of different absorbent liquid material adjacent to the second major surface of the first absorbent liquid component, and the second absorbent liquid component has a second full size and the second tank absorption liquid such that the ratio of the second area to the first total area is more than 3.5 to 1, the ratio of the second tank absorption liquid to the first tank absorption liquid is more than 10 to 1, and the full capacity of the absorption liquid is more than 35,

7. Multi-component absorbent liquid structure according to claim 6, where the voids in the second main surface of the first absorbent liquid component is formed so as to move the fluid along the first absorbing liquid component in addition to the release of fluid in the second absorbent liquid component.

8. Multi-component absorbent liquid structure according to claim 7, where the first absorbent liquid component holds less than 30% of artificial menstrual fluid after 1 min after injection of 10 ml of secretions in the center of the page is ctory.

9. Multi-component absorbent liquid structure according to claim 6, where the first absorbent liquid component provides the distribution of voids which are smaller near the second main surface and larger near the first main surface.

10. Multi-component absorbent liquid structure of claim 8, where the first absorbent liquid component provides the distribution of voids which are smaller near the second main surface than the voids in the second absorbent liquid component adjacent to the second main surface.

11. Sanitary napkin having a longitudinal axis, and improved management of liquid based on the use of multi-component absorbent structure, and the sanitary napkin includes:

permeable to fluid layer facing the body;

not permeable to the liquid layer facing to the garment; and

multi-component absorbent structure between permeable to fluid layer facing the body, and is not permeable to the liquid layer, facing the clothes, and multi-component absorbent structure includes:

the first absorbing liquid component in which at least part of this component is located on the longitudinal axis of the sanitary napkin, the first absolute is baroudi liquid component includes an associated flexible matrix of fibrous materials, forming mainly stratified layers, the first absorbent liquid component has a first main surface adjacent to the permeable fluid directed to the body layer, a second main surface opposite the first main surface, the first full size and the first size of the absorption liquid, and

the second absorbent liquid component comprising a layer different from a fluid-absorbing material adjacent to the second major surface of the first absorbent liquid component, and the second absorbent liquid component has a second full size and the second tank absorption liquid such that the ratio of the second area to the first total area exceeds 3.5 to 1 and a ratio of the second tank absorption liquid to the first tank absorption liquid is greater than 10 to 1, and the full capacity of the absorption liquid multi-component absorbent liquid is more than 35,

12. Sanitary napkin according to p. 11, where the first absorbent liquid component includes layers aerodynamically laid fibers of staple length, aerodynamically laid fibers made of fluff pulp, aerodynamically laid fibers chemically modified cellulose, hydrogel fibers and a combination thereof.

13. Sanitary napkin according to p. 12, where the first abs is rbrowse liquid component also includes materials from the particles.

14. Sanitary napkin according to p. 12, where the first absorbent liquid component associated with the use of thermally bonding fibers, adhesives, latex emulsions, and combinations thereof.

15. Sanitary napkin according to p. 11, where the second absorbent liquid component is selected from structures containing hydrogel structures of fluff pulp and mostly homogeneous structures obtained aerodynamic method.

16. Sanitary napkin according to p. 11, where the voids in the second main surface of the first absorbent liquid component is configured to move the fluid along the first absorbing liquid component in addition to the release of fluid in the second absorbent liquid component.

17. Sanitary napkin according to p. 11, where the first absorbent liquid component holds less than 30% of artificial menstrual fluid after 1 min after allocating 10 ml.

18. Sanitary napkin according to p. 11, where the first absorbent liquid component provides the distribution of voids which are smaller near the second main surface and larger near the first main surface.

19. Sanitary napkin under item 18, where the first absorbent liquid component provides the distribution of voids which are smaller near the second g is avnoj surface, than the voids in the second absorbent liquid component adjacent to the second main surface.

20. Sanitary napkin according to p. 11, also comprising a channel in the second absorbent liquid component that overlaps at least part of the periphery of the first absorbent liquid component.

21. Sanitary napkin according to p. 11, where, as a rule, stratified layers, the first absorbent liquid component include at least two layers of fibrous nonwoven material.

22. Sanitary napkin according to item 21, where at least one of the layers of fibrous nonwoven material selected from non-woven materials from carding, materials, molded aerodynamic method, fibrous materials obtained by the aerodynamic method of melt material from the threads spunbond production method, hydraulically bound fibrous materials, mechanically intertwined fibrous materials, and combinations thereof.

23. Sanitary napkin according to p. 11, where the first absorbent liquid component overlaps at least 50% of the area of the spots of the second absorbent liquid component produced artificial menstrual fluid through 10 min after the injection in the center of the first main surface of the first absorbent liquid component 5 ml from the response.

24. Thin, effectively a fluid-absorbing structure, including:

the first absorbent liquid component comprising an associated flexible matrix including stratified layers of fibrous material, and the first absorbent liquid component has a first main surface, a second main surface, the first full size, thickness and volume and the first absorption capacity of the liquid, and

the second absorbent liquid component comprising a layer of different absorbent liquid material adjacent to the second major surface of the first absorbent liquid component, and the second absorbent liquid component has a second full size, thickness and volume and the second tank absorption liquid, where the thickness of the first and second absorbent liquid components is each between 1 and 2 mm, the ratio of the second tank absorption liquid to the first tank absorption liquid is greater than 10; the ratio of the second area to the first total area exceeds 3.5 to 1, the ratio of the second volume to the first volume is greater than 10 to 1, and the full amount of a fluid-absorbing structure is less than 30 cm3; such that the first absorbent liquid component holds less than 30% of artificial menstrual fluid after 1 min after allocating 10 ml.



 

Same patents:

Dressing material // 2270646

FIELD: medicine, in particular dressing materials based on polymeric hydrogel coats.

SUBSTANCE: dressing material contains polymer film with polymeric hydrogel layered on the surface thereof. Said film is made of biocompatible optically transparent polymer having open holes with diameter of D = 0.01-3.0 mum and density of N = (103-109) 1/cm2, and polymeric hydrogel contains chitosan hydrogel. Dressing material of present invention prevents microorganism infiltration into wound and may be easily attached to wound surface.

EFFECT: improved dressing material with bacteriostatic action.

24 cl, 4 dwg, 8 ex

FIELD: sanitary and hygienic facilities.

SUBSTANCE: invention provides processes for manufacturing allays wetted superabsorbing materials characterized by afloat time below 30 sec and causing surface tension of salt solution by less than about 30%. These processes envisage treatment of superabsorbing material with surfactant solution, which surfactant has at least one functional group capable of chemically reacting with superabsorbing material and at least one unreactive and hydrophilic functional group. Surfactant is deposited onto superabsorbing material when functional groups on the surface thereof are activated. Invention also disclose allays wettable superabsorbing materials such as fibers made according indicated processes as well as disposable absorbing articles containing above allays wettable superabsorbing materials.

EFFECT: enabled manufacture of articles with better liquid distribution properties.

21 cl, 2 tbl, 2 ex

FIELD: medicine; absorbing structure with absorbing element with upper and lower surfaces defining the thickness.

SUBSTANCE: absorbing element has integral structure and includes first zone of high absorbing capacity separated from second zone of high absorbing capacity by part of thickness of absorbing elements. Zones of high absorbing capacity have absorbing fibers and particles of super-absorbing polymer. Part of thickness of absorbing element separating the first and second zones of high absorbing capacity is free from particles of super-absorbing polymer.

EFFECT: enhanced absorbing capacity.

24 cl, 12 dwg

FIELD: sanitary and hygienic facilities.

SUBSTANCE: superabsorption product of invention comprising liquid-impermeable base layer; liquid-absorbing intermediate layer containing partially neutralized acid-behaving hydrophilic polymer, in particular surface cross-linked polyacrylate; and liquid-permeable non-absorbing top layer is distinguished by containing alkali-neutralizing additive uniformly spread in absorbing intermediate layer.

EFFECT: enhanced controlling unpleasant smell and inhibited microbial growth.

10 cl, 1 tbl

FIELD: medical-destination absorption materials.

SUBSTANCE: invention relates to medical open-pore sorption nonwoven materials and articles based thereof, in particular to bandaging and draining articles etc. The articles can be used in ophthalmology, microsurgery, general, cardiovascular, and dentofacial surgery, gynecology, stomatology, otolaryngology, and other areas of applied medicine. More specifically, invention provides open-pore sorption material based on polyvinyl alcohol, crosslinking agent, surfactant, plasticizer, loosening agent, and foam suppressor. Equilibration of qualitative and quantitative composition regarding indicated constituents enables formation of strong multifunctional material allowing adequate effluent of exudate and irreversible removal of microbial bodies and their vital activity products from wound surface, suppresses pathogenic microflora, and also allows anti-inflammatory, anti-edematous, and analgesic effects thereby stimulating reparative processes in the wound.

EFFECT: enhanced therapeutical effect.

16 cl

FIELD: medicine, in particular, hygienic liquid absorbing articles.

SUBSTANCE: hygienic absorbing article of laminated structure has first liquid permeable sheet layer, second liquid permeable sheet layer arranged in the vicinity of first layer, and liquid absorbing member arranged in the vicinity of second layer. Second sheet is arranged so as to receive liquid released onto first sheet and transmit liquid to liquid absorbing member. In dry state, absorbing article has thickness less than or equal to 5 mm and liquid penetration rate less than 25 s.

EFFECT: reduced thickness and decreased risk of leakage.

37 cl, 7 dwg, 1 tbl

FIELD: medicine.

SUBSTANCE: the present innovation deals with an absorbent's structure in an absorbing product, such as a swaddling cloth, a diaper, a panty shield in case of incontinence of urine, a medicinal napkin, a wound bandage, a protective oilcloth for patient's bed, etc. that contains compressed foam (1) increased at wetting, where the foam (1) contains, at least, two combined layers (2,3,4) that have different average sizes of pores. The innovation enables to obtain an absorbent's structure of improved function in the form of compressed foam at its improved capacity for liquid absorption and distribution.

EFFECT: higher efficiency of application.

9 cl, 4 dwg

FIELD: medicine.

SUBSTANCE: the present innovation deals with liquid-absorbing polymeric foam with open cells with properties that make it useful to be applied as an absorbing structure in absorbing products, such as swaddling cloths, diapers, hygienic panty shields, preventive means applied at incontinence of urine, wound bandages, protective coverings for patients' beds, etc. Moreover, the mentioned foam has got the rate of absorption at moisturizing corresponding to, at least, 0.4 ml/sec for round sample of 50 mm diameter, capacity for liquid distribution at inclination of 30° corresponding to, at least, 15 g/g, and capacity to liquid accumulation corresponding to, at least, 9% detected due to CRC (centrifuge retention capacity), moreover, in all cases artificial urine is being analytical liquid. It is, also, described an absorbing structure that contains the above-mentioned foam. The latter has got the capacity to absorb liquid quickly, distribute it in the structure and accumulate it, as well.

EFFECT: higher efficiency of application.

7 cl, 4 dwg, 3 ex, 1 tbl

FIELD: medical engineering.

SUBSTANCE: device has high transverse rigidity in saturated state and is thinner than 5 mm.

EFFECT: reduced risk of uncontrolled deformations.

26 cl, 2 tbl

FIELD: medicine, hygiene.

SUBSTANCE: the present innovation deals with a fluffy tampon out of air-embedded material, of low density, out of unwoven material of low density indicated for intensive and concentrated absorption of menstrual liquid or urine in a hygienic panty shield or that for patients with urinary incontinence. Improved hygienic panty shields have been obtained for patients suffering urinary incontinence and, also, shields for personal care and personal hygiene. Tampon for panty shields is designed to decrease the volume that enhances rapid absorption and prevents the return of moisture both in thick and thin panty shields and concentrates the liquid in shield's center.

EFFECT: higher efficiency.

21 cl, 6 dwg, 1 ex, 3 tbl

FIELD: cellulose fibers treated with oil and compacting agent for modifying properties of fibers; methods of production of cellulose fibers.

SUBSTANCE: cellulose sheet includes: cellulose fibers, oil applied on cellulose fibers; oil is present in the amount of about 0.5 to 20 mass-% of mass of dry fibers and modifying agent applied on cellulose fibers; modifying agent is present in the amount of about 0.5 to 20 mass-% of active agents of dry mass of fibers. Method of production of cellulose sheet includes: preparation of cellulose mass, molding cellulose sheet from this mass, application of oil on cellulose sheet; oil is present on fibers in the amount of about 0.5 to 20 mass-% of mass of dry fibers and application of modifying agent on cellulose fibers; modifying agent is present in the amount of about 0.5 to 20 mass-% of active agents of dry mass of fibers. Method of production of compacted cloth of cellulose fibers includes: making cellulose fibers treated with oil and modifying agent which modifies properties of compacting the cellulose fibers; cellulose fibers treated with oil and modifying agent contain about 0.5 to 20 mass-% of active agents of dry mass of cellulose fibers; method includes also separation of cellulose fibers treated with oil and compacting modifying agent, molding separated cellulose fibers treated with oil and modifying agent into cloth and compression of cloth. Method of modifying properties for compacting of cellulose fibers includes treatment of fibers with oil; before treatment of cellulose fibers with oil and after application and removal of compressive load they are compacted to first specific mass; then cellulose fibers are compacted to second specific mass after application and removal of compressive force; first specific mass exceeds second specific mass; this method includes: application of modifying agent on fibers treated with oil; this modifying agent modifies properties of fibers for compacting; it is applied on cellulose fibers in the amount of about 0.5 to 20 mass-% of active agents of dry mass of cellulose fibers; modifying agent is applied on fibers treated with oil in the amount sufficient for compacting the fibers to third specific mass after application and removal of compressive load; third specific mass is more than first specific mass. Article for absorption of aqueous fluid medium includes: super-absorbing materials and oil applied on cellulose fibers in the amount of about 0.5 to 20 mass-% of mass of dry fibers and modifying agent applied on cellulose fibers in the amount sufficient for presence of active agents in the amount of about 0.5 to 20 mass-% of dry mass of cellulose fibers.

EFFECT: possibility of retaining super-absorbing materials in structures.

38 cl, 3 dwg, 1 tbl

Hygienic layer // 2266092

FIELD: manufacture of absorbing article for women, made in the form of hygienic layer, insert for pants or protective means used in case of incontinence.

SUBSTANCE: hygienic layer has absorbing body laid between liquid permeable outer sheet and liquid impermeable outer sheet. Absorbing body has front part adapted to face forward during wearing of article, and rear part. Absorbing body is 140-260 mm long and is narrowing in backward direction from part, having maximal width and disposed in front part of article, up to end of rear part of said article. Absorbing body has maximal width of 60-80 mm in its front part and minimal width of 5-20 mm in its rear part, and comprises layer of cellulose filaments formed by dry process. Said layer has density of at least 250 g/dm3 and is extending substantially over the whole surface of absorbing body up to front and rear edges of said body.

EFFECT: increased efficiency by allowing user to effectuate free motions without deteriorating absorbing qualities of hygienic layer, wider operational capabilities and convenient use.

10 cl, 2 dwg

FIELD: medicine, in particular experimental and clinical surgery and transplantation methods.

SUBSTANCE: claimed wound coat in form of sponge, gel, colloid solution, film contains chitosan with deacetylation ratio of 0.95-0.99 and molecular weight of 10-1000 kDa in form of chitosan ascorbate containing (in 1 g of dry chitosan): ascorbic acid 1.8 g; as well as chondroitinsulfuric acid 500-100 mg; hyaluronic acid 10-100 mg; heparin 2.5-5 mg, and serum cattle growth factor 11-220 mum. Wound of present invention is useful in reduction of skin wound defects.

EFFECT: more effective method for reduction of skin wound defects.

2 tbl, 1 ex, 1 dwg

FIELD: medicine, experimental and clinical surgery, combustiology, transplantology, cosmetology.

SUBSTANCE: the present innovation deals with restoring artificial matrix of dermal-epidermal skin equivalent. The method, also, deals with mixing both collagen and chitosan by adding a surface-active substance and a binding agent followed by pouring the mixture obtained, its freezing followed by freeze drying and gamma-sterilization, moreover, before obtaining polyelectrolytic complex of collagen and chitosan one should successively supplement chitosan with aqueous solutions of 1.8 g/g dry chitosan of ascorbic acid, 5-100 mg/g dry chitosan of chondroitin sulfuric acid, 10-100 mg/g dry chitosan of hyaluronic (D-glucuronic) acid, 11-220 mcg/g dry chitosan of cattle serumal growth factor and 2.5-5 mg/g dry chitosan of heparin. The method provides to obtain a structure similar to skin that substitutes skin defect perfectly.

EFFECT: higher efficiency.

6 dwg,1 tbl

FIELD: medicine.

SUBSTANCE: method involves applying napkin impregnated with medicament to an injured articulation area. The medicament contains hydrocortisone acetate in the amount of 0.4mg/cm2, dimexide - 1.4 mg/cm2 and sodium alginate - 4.1 mg/cm2. The napkins are applied to internal and external side of the articulation for 6 days, changing them in three days.

EFFECT: accelerated treatment course.

The invention relates to medicine, namely to the combined multilayer dressings for first aid and treatment of wounds of various etiologies, including bleeding, infected wounds, radiation traumatic lesions, to close the donor site wounds after surgery

The invention relates to materials that absorb odors
The invention relates to medicine, namely to the materials used as a therapeutic covering for wounds

The invention relates to medicine and can be used as dressings for wounds

The invention relates to medicine, namely to absorbent articles containing polisakharidami vysokoporodnymi material, which is obtained by dehydration of cross-linked hydrogel using the polar solvent from the polymer mixtures containing polysaccharide having an ionic charge and polysaccharide having no ionic charge
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