Suction material having excellent suction and capillary suction properties

FIELD: medicine, in particular, suction systems for manufacturing personal hygiene articles.

SUBSTANCE: suction system has suction material located within extendable layer. Second outer layer may be located at side opposite extendable layer. At least one of outer layers should be moisture-permeable. Said layers may be joined with one another through patterned connection. Suction system may be manufactured from one layer or plurality of layers and may be made as, for example, laminated materials formed by pulling to form necking, laminated materials formed by pulling to form necking, laminated materials formed by pulling, and laminated materials formed by pulling with zero extension. Additional layer may be provided within structure, said layer being adapted for enabling capillary suction. Said suction system is suitable for employment in personal hygiene articles such as napkins, sportive trunks, clothing for individuals suffering incontinence, women's personal hygiene articles.

EFFECT: improved suction and distribution capacity of suction article wherein sufficient effectiveness of supersucking layer in capillary suction is kept.

21 cl, 2 ex

 

Prior art

The present invention relates to a holding material primarily intended for use in personal hygiene products such as diapers, training pants, swimwear, absorbent men's underwear, products for adults suffering from incontinence and personal hygiene products for women. This material can also be used in other products, such as bandages and dressings, bibs, and in products intended for veterinary use.

Articles intended for personal hygiene, generally contain any absorbent material designed to absorb body fluids. This absorbent material or absorbent inner part, usually made of several layers or materials and may be in different proportions to contain natural fibers, synthetic fibers and chopped superficiali material. When fluid, such as urine, gets into the subject of personal hygiene such as a diaper, it passes through the upper layer (usually the layer facing the body, and distributing layer, intended for the temporary retention of fluid. After passing through these upper layers, urine flows into the absorbent inner part of the product. Absorbent inner portion continuously by keeping the et liquid. In the case of absorbent inner part containing crushed superficiali material, the amount of absorbed liquid is determined by the marginal absorbent crushed superficiales material.

Absorption capacity superficialy materials may be limited due to physical limitations of the system. If superficiali material is located in a confined space and may not swell upon contact with a liquid, the volume of absorbed liquid will be limited. If superficiali material swells and cannot expand freely, the pores between the particles superficiales material will be compressed and reduced in size. The marginal decrease in the size of the pores leads to the phenomenon known as "blocking gel, whereby further flow of fluid is stopped due to expansion superficiales material on the site fluids and capillary absorption liquid layer superficiales material ceases. This can occur even when other parts of absorbent inner part is not wetted by the liquid, and it is obvious that in this case superficiali material is used inefficiently and ineffectively. On the other hand, if superspecialawesome material to provide an opportunity to nab the AMB without limitation, the pore size becomes too large for capillary liquid is absorbed up to a certain height, and this, ultimately, will block the flow of fluid. It is therefore desirable to provide superspecialawesome material able to swell in a controlled way and to a controlled extent, to preserve the integrity of the pores and continued capillary absorption and to ensure contact between any material capable of capillary absorption, and superficialis material, as well as between particles superficiales material.

Thus, the system of absorbing inner part, which will have good wicking ability and capacity allocation, and which will retain sufficient capacity superficiales layer by capillary absorption, so that the absorbent inner part was used to a greater extent. In such a system largely has maintained the integrity of the pores and appropriate distribution of pore size, so that the liquid can continue to be absorbed, despite the wetting external sites absorbent inner part.

Summary of invention

To overcome the above difficulties and problems existing in the prior art, has developed a new system is as absorbing inner part for personal hygiene, in which the layer containing superficiali material, is located between the two layers. The first layer is an elastic outer layer and a second layer located on the side opposite to the first layer. At least one of the layers is moisture-permeable. Layers can be connected to each other by means of connection in the form of a pattern. Both the outer layer can be stretchable and/or flexible and, depending on the layer (layers) of material, the direction of stretching can be controlled.

May also contain a separate layer, capable of capillary absorption.

Definition

"Disposable" refers to the fact that after a single use must be discarded and not subjected to washing and re-use.

"Transmission fluid" means the fluid can move from one layer to another layer or from one area to another area within the layer.

"Hydrophilic" describes fibers or the surfaces of fibers which are wetted contact with the fibers fluids water-based. In turn, the degree of wetting of materials can be described by boundary angles and surface tension of the contacting liquids and materials. For measuring the wettability of particular fiber materials and mixtures of fibrous materials which you can use the equipment and how the system Cahn SFA-222 Surface Force Analyzer System or substantially equivalent systems. When measured with this system, fibers, characterized by edge angles less than 90°are considered to be "wettable"or hydrophilic, while fibers are characterized by boundary angles greater than 90°, are considered "non-wetted" or hydrophobic.

When used in the present invention the term "non-woven material or fabric" means a material whose structure is formed of individual fibers or strands that are twisted, but not the way knitted fabric. Non-woven material or fabric formed using various methods, such as, for example, aerodynamic methods for obtaining from the melt, spunbond methods of production and methods of making nonwoven material of carding. Mass unit area of nonwoven materials is usually expressed in ounces of material per square yard (osy) or grams per square meter (g/m2), and the diameters of the fibers is usually expressed in micrometers (Note that for translation osy in g/m2multiply the osy on 33,91).

The term "spunbond fibers production method" means fibers of small diameter, which are formed by extrusion of molten thermoplastic material in the form of filaments through many thin capillary channels of the nozzle. This method is disclosed, for example, in U.S. patent US 4340563, vidan the m Appel et al., and the US patent US 3802817 issued by Matsuki et al. Fiber may also have the form, such as described, for example, in U.S. patent US 5277976 issued Hogle et al., which describes fiber non-standard form.

"Non-woven fabric of carding" means a fabric made from staple fibers that pass through the device to Griebnitzsee or carding, in which staple fibers are separated or detached and are aligned in the longitudinal direction by forming oriented primarily in a longitudinal direction of the fibrous non-woven cloth. This material may be associated methods, which include point linking, linking by blowing air, ultrasonic binding, glue binding, etc.

"Aerodynamic shaping" is a well-known method, which can be molded fibrous nonwoven layer. In the aerodynamic method of forming bundles of small fibers, the typical length of which varies from about 3 to about 52 millimeters (mm)are separated and captured by the feed air stream, and then deposited to form the grid, typically by means of a vacuum supply. Then randomly deposited fibers connect to each other using, for example, hot air or spray glue. Aerodynamic molded described, for example in U.S. patent US 4640810, issued by Laursen et al.

For binding nonwoven cloths known different ways. These include linking by blowing air, tying stitches, an ultrasonic link, a point linking and patterned (or point) from loosening. Examples of such linking techniques described in U.S. patent US 4891957 issued to Strack et al., US 4374888 issued Bornslaeger, US 3855046, issued to Hansen and Pennings, and US 5858515 issued by Stokes et al.

When used in the present invention, the term "elastic composite material" means a resilient material, which may be a multi-component material or a multilayer material in which at least one layer is elastic. Such materials may constitute, for example, layered materials, "formed with the hood in the neck", laminates, "formed with hood", laminates, "formed with the hood in neck with hood", and layered materials, "formed with an exhaust hood with a zero strain".

"Formation with the hood in the neck" means the way in which the elastic element is associated with inelastic element, so that it is stretched or pulled at the neck of the only non-resilient element, so that its size has decreased in the direction perpendicular to the stretching. "Layered material, formed with an exhaust hood in the neck" means whom positiony elastic material, manufactured by way of molding with the hood in the neck, i.e. in which layers are connected to each other, when only non-resilient material is in the stretched condition. Such layered materials usually have the ability to stretching in the transverse direction. Examples of layered materials that are molded with the hood in the neck, are described in U.S. patent US 5226992, 4981747, 4965122 and 5336545, issued to Morman et al., and the US patent US 5514470 issued by Haffner et al.

Typically, the forming hood" means the way in which the elastic element is associated with another element, so that only the elastic element is stretched at least about 25% of its length in the reduced state. "Layered material, molded hood" means a composite elastic material made by the method of molding with extraction, i.e. in which layers are connected to each other, when only the elastic material is in a stretched condition, so that after the reduction of the inelastic layers layer sobrevida. Such layered materials usually have the ability to extract in the longitudinal direction, and can be stretched to such an extent inelastic material, soborny between the provisions of binding allows you to lengthen the elastic material. One type of layered material, formed with an exhaust hood, RAS is accommodated, for example, in U.S. patent US 4720415 issued to Vander Wielen et al., uses multiple layers of the same polymer obtained by many groups extruders. Other composite elastic materials disclosed in U.S. patent US 4789699 issued by Kieffer et al., U.S. patent US 4781966, issued to Taylor, and U.S. patent US 4657802 and 4652487, issued to Morman, and US 4652487, issued to Morman et al.

In particular, in U.S. patent US 4657802 disclosed a method of making a composite nonwoven elastic fabric containing elastic nonwoven fabric associated with fibrous nonwoven sodbrennen canvas. The method includes manufacturing a non-woven elastic fabric having a length in the reduced state, i.e. unchanged in length, and a length in a stretched state, i.e. the changed length of the extrusion nonwoven elastic fabric to its length in a stretched state, i.e. changed in length, forming a fibrous nonwoven sobrevuelos paintings directly on the surface of the nonwoven elastic fabric in its stretched condition, i.e. with a modified length, forming a composite elastic nonwoven cloth by binding fibrous nonwoven sobrevuelos cloth with nonwoven elastic fabric while maintaining the nonwoven elastic fabric in its stretched condition, and reduction of non-woven elastic Polat is to its length in the reduced able to sobrepena fibrous nonwoven sobrevuelos paintings. Binding fibrous nonwoven sobrevuelos cloth with nonwoven elastic fabric occurs simultaneously with the molding sobrevuelos cloth on the surface of the elastic blade.

Typically the molding with the hood in neck with hood" means the way in which the elastic element is associated with another element, so that the elastic element is stretched at least about 25% of its length in the reduced state, and the second layer is elongated in the neck of the stiff layer. "Layered material, formed with an exhaust hood in neck with hood" means a composite elastic material made by the method of molding hood in neck with hood, i.e. in which layers are connected to each other, when both layers are in the stretched condition, and then they are given the opportunity to decline. Such layered materials usually have the ability to extract all directions.

Typically, the forming hood "zero strain" means a method in which at least two layers contact each other, while in the unstrained (therefore with zero strain) condition, and one of the layers is stretchable and elastomeric, and another stretch, but not necessarily elastomeric. This laminated material is subjected to the hood locally way of the use of one or more pairs siteplease corrugated rolls, which reduce the degree of deformation of the canvas. "Layered material, formed with an exhaust hood with a zero strain" means a composite elastic material made by the method of molding hood with zero tension, i.e. in which elastic and inelastic layers are connected to each other, when both layers are in an unstretched condition, and subjected to extraction using siteplease corrugated rolls. After drawing a layered material of the second layer at least to some extent remains constantly in the elongated state, so that after termination of the pulling force of the layered material is not returned in its original, undeformed state. This leads to the fact that the layered material becomes three-dimensional in the z-direction and for this reason becomes elastic stretchability in the direction of the original drawing at least to the extent to which he was subjected to extraction initially. Examples of such layered materials and methods for their manufacture are shown in U.S. patents US 5143679, issued to Weber et al., US 5151092 issued to Buell et al., US 5167897, issued to Weber et al., and US 5196000 issued by Clear et al.

"The subject of personal hygiene" means articles intended to absorb body exudates, such as diapers, training pants, swimwear, absorbent male bottom is Elle, products for adults suffering from incontinence, ostomy supplies, veterinary and funeral products and personal hygiene products for women.

"Targeted area" means an area or position on the subject of personal hygiene, which usually includes user's selection.

Research tools and materials

The mass of a unit area: the Mass of a unit area can be determined by cutting out circular pattern with a diameter of 7.6 cm (3 inches) and weighing scales. The weight is recorded in grams. The mass divided by the square of the sample.

The caliber of the material (thickness): Caliber material is a measure of thickness and is measured in millimeters at a pressure of 0.05 pounds/inch2(3.5 g/cm2) using the tester for bulk materials like STARRET®.

Density: the Density of a material is calculated by dividing the mass of a unit area of the sample, expressed in grams per square meter (g/m2), on the caliber of the material, expressed in millimeters (mm). The caliber should be measured at a pressure of 0.05 pounds/inch2(3.5 g/cm2as it is described above. The result is multiplied by 0.001 and the resulting value is transferred in grams per cubic centimeter (g/cm3).

Detailed description of the invention

The present invention relates to absorbent system used in personal care items to ensure that good is th capillary absorption and absorbency.

In one embodiment, the present invention includes an absorbent material surrounded by an elastic fabric. Absorbent material may include superficiali material in various forms: in the form of particles, fibers, foams and the like, and it may include natural fibers, binders and synthetic fibers. In this embodiment of the present invention the elastic material should be vlagopronitsaemym layer. Moisture-permeable materials include perforated containing filler and fibrillated films, woven and nonwoven fabrics, foams with open pores, mesh materials, and any other layer that allows passage of liquid water. The elastic material may also be any suitable moisture-permeable elastic material associated with fabric using elastic rubber latex. This absorbing system can be made by placing absorbent material on the elastic material and wrapping an elastic material, to include absorbent material with getting ready absorbent system.

In yet another embodiment of the present invention, absorbent system can be made of two elastic layers, between which is placed an absorbent material. In this embodiment of the invention the SL is also preferably connected to each other in some way for holding absorbent material and only one layer should be moisture-permeable. If both layers are elastic, they can be flexible in the same direction in different directions or in all directions. If they both are elastic in the same direction, the layered material is elastic in this direction in the wet or dry state. Suitable elastic materials, which are flexible in one direction, include molded with hood laminates and molded with the hood in the neck laminates discussed above. Elastic in all directions materials include molded with the hood in the neck and hood layered materials, also discussed above. The elastic material may be any suitable material such as flexible perforated film, woven or non-woven fabric or mesh material. The elastic material may also be any suitable vlagopronitsaemym material associated with other materials using elastic rubber latex. The elastic layer may also be moisture-permeable.

In another embodiment, the present invention absorbent system can be made of two elastic layers, between which is placed an absorbent material. The layers are preferably connected with each other by means of connection in the form of a pattern, such that p and the displacement absorbing system absorbing material was kept approximately the same place. In this embodiment, the present invention only one of the outer layers should be moisture-permeable.

In another embodiment, the present invention absorbent system can be made of the elastic layer and the elastic layer, between which is placed an absorbent material. The layers are preferably connected with each other by using a pattern such that when moving the absorbent system absorbing material was kept approximately the same place. In this embodiment, the present invention only one of the outer layers should be moisture-permeable.

In another embodiment of the present invention, absorbent system can be made of inextensible layer and the tensile layer, between which is placed an absorbent material. The layers are preferably connected with each other by using a pattern such that when moving the absorbent system absorbing material was kept approximately the same place. In this embodiment, the present invention only one of the outer layers should be moisture-permeable.

Tensile layer in these embodiments, the implementation of the present invention may be, for example, a spunbond material production method, reversible elongated neck, as described in U.S. patent US one hood by about 75 percent, usually in a direction generally parallel to the extrusion direction in the neck, this material is capable of stretching at least about 75%, and reduction of at least about 50 percent. This material is manufactured by the application of traction of at least one material to extrude the material in the neck, heat stretching the neck of the material, and cooling the extruded neck material, so that a reversible elongated neck material has a higher heat of fusion and/or a smaller initial melting point than the elongated neck of the materials to heat.

In another embodiment, the present invention absorbent system can be made from a flat non-elastic layer and the elastic layer with absorbent material placed between the two layers. The layers are preferably connected with each other by means of connection in the form of a pattern, such that when moving the absorbent system absorbing material was kept approximately the same place. In this embodiment, the present invention only one of the outer layers should be moisture-permeable.

Due to the presence of a great multitude of composite elastic materials may be many other embodiments of the present invention. The outer layers of absorbent is istemi can contain many layers and they can be for example, the layered materials that are molded with the hood in the neck, layered materials formed with an exhaust hood, layered materials that are molded with the hood in the neck and hood, and layered materials formed with an exhaust hood with a zero extension.

In any of the embodiments of the present invention in the structure can be placed additional layers. In particular, for giving the ability to capillary absorption, better than only the outer layer or absorbent material within the system can be placed a layer of nonwoven material from the carding, material, molded aerodynamic method, or material, spunbond production method. The cross-section of such a structure can include a layer capable of capillary absorption in the middle, with the location of absorbent material on one or both sides and with the subsequent location of the outer layers.

It should be noted that, if necessary layered material, which is elastic or stretchable in one or more directions, the layered material inelastic materials should not be used in such a way that they have limited strength. So superficiale materials or other materials contained in the inner layer must be change in Econom form or in the form of short fibers, i.e. in discrete form in order to allow movement, or, if they are not in a discrete form, such as a long fiber, foam, film or non-woven material, they must be flexible.

Materials suitable for the manufacture of the outer layers of the system can be non-woven cloth made of elastomer and elastomeric polymers in accordance with various methods known to experts in the field of technology, including obtaining aerodynamic method from the melt, spunbond production method, the obtaining of carding and aerodynamic shaping. Paintings can also be linked by known methods, including linking by blowing air, tying stitches, an ultrasonic link, a point linking and patterned (or point) from loosening. In the embodiment of the present invention can also be used moisture-permeable elastomeric and elastomere films, which include perforated, fibrillated and containing the filler film.

Tensile layer allows superspecialawesome material after wetting to swell to a controlled extent, to maintain the integrity of the pores and suitable pore size and their distribution, and sufficiently lasted capillary absorption of liquid through supervet the living material. Regulation of pore size and distribution can be achieved by appropriate tensioning of the material tensile layer in accordance with the curvature underneath the body and thus to regulate the pressure on the layer containing superficiali material. Through the distribution of tensile stress in the material can be made so that the pressure is changed in accordance with the height. In addition to the usual known superficialy materials, similarly should act any swelling in the liquid material.

The elastomeric polymers used in the embodiment of the present invention may be polymers made from block copolymers such as polyurethanes, copolymers, esters and ethers, block copolymers of simple esters and amides, copolymers of ethylene with vinyl acetate (EVA), block copolymers having the General formula of a-B-A' or a-b, such as a copolymer of (styrene/ethylene-butylene), styrene-poly(ethylene-propylene)-styrene, styrene-poly(ethylene-butylene)-styrene, (polystyrene/poly(ethylene-butylene)/polystyrene), poly(styrene/ethylene-butylene/styrene)and the like Elastomeric copolymers and the formation of the elastomeric non-woven cloths of these elastomeric copolymers are disclosed, for example, in U.S. patent US 4803117. Elastomeric non-woven fabric may be formed, for example, from elastome the data block copolymers (polystyrene/poly(ethylene-butylene)/polystyrene). Examples of such sales elastomeric copolymers are, for example, materials known under the name KRATON®manufactured by Shell Chemical Company of Houston, Texas. Block copolymers KRATON® come in a few different compositions, some of which are described in U.S. patent US 4663220, 4323534, 4834738, 5093422 and 5304599.

In the embodiment of the present invention can also be used polymers consisting of elastomeric terrablock copolymers a-b-A-C. Such polymers are discussed in U.S. patent US 5332613, issued to Taylor et al. In such polymers And is a block of thermoplastic polymer, and is a Monomeric isoprene link, mainly gidrirovannoe to-unit link copolymer of propylene with ethylene. An example of such terrablock-copolymer is an elastomeric block copolymer is a styrene-poly(ethylene-propylene)-styrene-poly(ethylene-propylene)or SEPSEP, produced by Shell Chemical Company of Houston, Texas under the trade name KRATON®.

Other typical elastomeric materials that may be used include polyurethane elastomeric materials such as, for example, marketed under the trade name ESTANE® the B.F.Goodrich company & Co. and MORTHANE®produced by Morion company Thiokol Corp., elastomeric materials made from polyesters, such as, for example, marketed under the trade on the cation HYTREL® company E DuPont de Nemours & Company, and marketed under the trade name ARNITEL®previously released by the company Akzo Plastics of Arnhem, Holland and now produced by DSM ofSittard, Holland.

Another suitable material is a block copolymer of ester and amide having the formula:

Such materials of various grades under the trade name REACH® produced by the company ELF Atochem Inc. of Glen Rock, New Jersey. Examples of such polymers are described in US patents U.S. 4724184, 4820572 and 4923742 issued by Killian et al.

Thermoplastic elastomers of copolymers of esters include copolymers of esters and ethers of the General formula:

where G is selected from the group comprising poly(oksietilenom)-alpha, mega-diol, poly(oxypropylene)-alpha, mega-diol, poly(oxytetracyline)-alpha, mega-diol, and a and b are positive whole numbers, including 2, 4 and 6, m and n are positive integers, including the values 1-20. Such materials typically have an elongation at break equal to from about 600 to about 750%, when measured in accordance with ASTM D-638, and a melting point equal to from about 350 to about 400°F (176 to 205°C)when measured in accordance with ASTM D-2117. Examples of commercially available such material is in from copolymers of esters include, for example, materials known under the name ARNITEL®previously released by the company Akzo Plastics of Arnhem, Holland and now produced by DSM ofSittard, Holland, and also known under the name HYTREL®produced by the company I duPont de Nemours of Wilmington, Delaware. The formation of the elastomeric nonwoven elastomeric materials made from polyesters are disclosed, for example, in U.S. patent US 4741949, issued to Morman et al., and the US patent US 4707398 issued Boggs.

Elastic polyolefins are also used when implementing the present invention. Such polymers are referred to as "metallocene" polymers and their releases Exxon Chemical Company of Baytown, Texas under the trade names ACHIEVE® for polymer based on propylene and EXACT® and EXCEED® for polymers based on ethylene. Dow Chemical Company of Midland, Michigan produces polymers sold under the name ENGAGE®. These materials are presumably made using asteroseismic metallocene catalysts. Exxon usually calls used in its technology metallocene catalysts "one-catalysts", while the Dow calls these catalysts catalysts restricted geometry", to distinguish them from traditional catalysts of the Ziegler-Natta, in which there is a lot of reaction centers, and vypuskaya called INSIGHT® . When implementing the present invention are preferred elastic polyolefins, such as polypropylene and polyethylene, and the most preferred - elastic polypropylene.

Natural fibers include wool, cotton, flax, hemp and wood pulp. Wood pulp includes a standard soft wood reposeidas brands, such as CR-1654 (US Alliance Pulp Mills, Coosa, Alabama). Cellulose can be modified to enhance the valuable characteristics of the fibers and their ability to recycle. The crimp may be imparted to the fibers by methods including chemical treatment or mechanical torsion. The tortuosity usually give before joining or stiffening. Cellulose can be given rigidity by using cross-linking reagents, such as formaldehyde or its derivatives, glutaric aldehyde, epichlorohydrin, metilirovannye compounds such as urea or urea derivatives, dialdehyde, such as maleic anhydride, neetilirovannye derivatives of urea, citric acid or other polybasic carboxylic acids. Some of these reagents are less desirable than others because of adverse effects on the environment and people's health. Cellulose can also be made more rigid by using heat or processing and alkalis, such as mercerization. Examples of these types of fibers include NHB416 representing chemically cross-linked cellulose fibers from the soft wood of trees South of the rocks which have increased module in the wet state, produced by the company Weyerhaeuser Corporation of Tacoma, WA. Other used brands of cellulose are loosened pulp (NF405) and nerastrachennuyu cellulose (NB416) also produced by Weyerhaeuser company. HPZ3 produced by the company Buckeye Technologies, Inc. of Memphis, TN, subjected to chemical processing, which, along with providing additional rigidity in dry and wet condition and elasticity gives the fiber crimp and twist. Other suitable cellulose is Buckeye HPF2, and another - IP SUPERSOFT®produced by International Paper Corporation. Suitable fibres of artificial silk are the fiber Tonini of 1.5 denier Merge 18453 production company Tencel Incorporated of Axis, Alabama.

Superficiale materials that are suitable for use in the present invention can be selected from classes on the basis of chemical structure, and physical condition. These include superficiale materials with low strength gel, high strength gel, surface crosslinked superficiale materials, evenly stitched superficiale materials and superficiale m is materials with variable density of crosslinks in the structure. Superficiale materials can be based on the chemical structures, which include polyacrylic acid, a copolymer of isobutylene with maleic anhydride, polyethylene oxide, carboxylmethylcellulose, polyvinylpyrrolidone and polyvinyl alcohol. Superficiale materials can have different rates of swelling - from low to high. Superficiale materials can be in the form of foams, macroporous or microporous particles or fibers, particles or fibers with fibrous or fine coatings or materials having a fibrous or fine morphology. Superficiale materials can be in the form of tapes, particles, fibers, sheets or films. Superficiale materials can have different lengths and diameters and different distributions of the values of these quantities. Superficiale materials can exist in different degrees of neutralization. The counterions are usually Li, Na, K, CA.

Materials relevant to the present invention may include superficiale materials of the above types. Typical superficiale materials produced by the company The Dow Chemical Company. An example of these types superficialy material may be a material, manufactured by Stockhausen, Inc. called FAVOR® SXM 880. An example of a fibrous supervet the covering material may be a material, manufactured by the company Camelot Technologies, Ltd., of High River, Alberta, Canada, under the name FIBERDRI® 1241. Another example of these types superficialy material may be a material manufactured by the company Chemtall Inc. of Riceboro, GA under the name FLOSORB 60 LADY®also known as the LADYSORB 60®. Examples superficialy materials with coatings of fibers or fine particles are microcrystalline cellulose, put on FAVOR® 880, and FAVOR® 880 coated with cellulose fibers. They are described in the provisional application for U.S. patent US 60/129774. In the present invention can also be used with other types superficialy materials not listed in the present invention, which are public and well-known specialists in this field of technology.

The binder is usually used in these structures, instrumental in enhancing the mechanical integrity and stability. To the binder include fiber, liquids, or other binders that can be thermally activated. Preferred for inclusion are fibers having a melting temperature close to the melting point of polyolefin fibers. Low-melting polymers give the material the ability to contact the contact points of the fibers when heated. In addition, for the implementation of this breath is retene suitable fiber, made of low-melting polymers, such as two-component and two-element fiber. Fibers made from low-melting polymers are usually called "fusible fibers". "Low-melting polymers" means polymers, the glass transition temperature below about 175°C. it Should be noted that the texture of the absorbent cloth can be modified from soft to hard by selection of glass transition temperature of the polymer. Typical binder fibers include bicomponent fibers of polyolefins, polyamides and polyesters. Three suitable binder fibers are bicomponent fiber with a core, produced by the company KoSa Inc. (Charlotte, North Carolina) under the designation T-255, polyethylene/polyethylene terephthalate fiber and T-256, or Copolyester, although specialists in the art will know many suitable binder fibers, and they are available from many manufacturers, such as Chisso and Fibervisions LLC of Wilmington, DE. The KoSa company has developed from a copolymer of ester suitable binder fiber structure fiber core, known as the T-254 (low-melting copolymer of poly (ethylene terephthalate). Suitable liquid binder is KYMENE® 557LX, produced by Hercules Inc. of Wilmington, DE. Other suitable liquid binder are emulsion copolymers of ethylenes and vinyl acetate, sold by the company National Starch and Chemical Company (Bridgewater, New Jersey) under the trade name of the series DUR-O-SET® ELITE® (including ELITE® 33 and ELITE® 22). The company Air Products Polymer and Chemicals sells other suitable binder fibers called AIRFLEX®.

Fiber used to obtain material suitable for use in the present invention may be a single component, paired (two-component), multi-component or two-element fibers. If they are paired, they can have a parallel configuration, the configuration of the fiber core or island configuration. The fibers may be twisted or suitable to impart a crimp in accordance with, for example, U.S. patent US 5382400 issued to Pike.

Examples of suitable absorbent systems of the present invention is:

Example 1

A laminate is obtained using the outer layers of the layered material, formed with an exhaust hood (CERs), and both layers extend in the same direction in accordance with U.S. patent US 4657802, issued to Morman. CCB is made by pulling the elastic layer obtained by the aerodynamic method from the melt, and associate it with a stiff layer on both sides. The elastic layer is a layer obtained aerodynamic way from rspl the VA, mass per unit of area, equal to 71 g/m2(2,1 osy), made of polymer KRATON® G-2740. Inelastic layers are layers of spunbond production method with mass per unit of area, equal to 30.9 g/m2(0,91 osy), made of polypropylene, polymer ESCORENE® manufactured by Exxon Chemical Corp. The mass of a unit area CCB equal to 132.6 g/m2(3,9 osy).

Material CER remove one surface layer, and the first layer of CERs is placed on a flat surface with the upward side, the obtained aerodynamic method from the melt. Particles superficiales material, in this case superficiales material FAVOR® 880, spread on a layer of CERs in the number and 88.8 g/m2(2,62 osy). The second layer of the same CERs with the downward side, the obtained aerodynamic method from the melt, put on superficiali material and the layers laminated in the press with the formation of square mesh binding pattern with the side of a square equal to approximately 12 mm (half inch) at a pressure piston, equal 421,9 kg/cm2(6000 pounds/inch2). Use press production company PHI in the City of Industry, California, model No. 0230 C-X1-4B-7, serial No. 92-10-012. The mass of a unit area of the laminate is equal to 293 g/m2(8,64 osy).

Dry layered material is very thin, stretchable, and so is taking the shape of the body. Cut the samples in the following sizes: 6 cm (of 2.375 inches) in the direction of the extrusion and compared to 8.26 cm (3.25 inches) in the direction in which the hood is not conducted, 2.5 mm (0,099 inches) thick. This sample has a mass equal of 1.46 g, and it is drawn to a length approximately equal to 11.4 cm (4.5 inches), using normal tension created by hand.

The sample for about half an hour, placed in water, to which was added a small amount of surfactant. After that the sample has a length of 5.7 cm (2.25 inches), width 7.6 cm (3 inches), and its thickness varies from 8.1 to 13.3 mm (0,319 to 0,525 inches). The sample has a mass equal to 26.9 g, and it is drawn to a length equal to 10.2 cm (4.25 inches), approximately the same tension that is created by the hand of the same man as above.

As can be seen from these data, the thickness of the sample in the dry state more than about 3 times greater than its thickness in the dry state, however, the elongation in the wet and dry state is about the same. Weight and thickness change due to water absorption, but other characteristics remain unchanged.

Example 2

Two layers obtained by the aerodynamic method, used for the manufacture of a sample of layered material capable of capillary absorption, and the control sample, each of which is blade dimensions of 5.1 cm to 15.24 cm (2 inches by 6 inches). The obtained aerodynamic method layer capable of capillary absorption, manufactured using 90 wt.% cellulose Weyerhaueser NB416 and 10 wt.% binder fibers T-255 Merge 34821 And 6 mm, 2,8 denier. The obtained aerodynamic method layer capable of capillary absorption, has a weight per unit area of 150 g/m2density equal to 0.15 g/cm3and a thickness of 1 mm Obtained by the aerodynamic method layers have a weight equal to 1.05 and 1.08,

Control sample

The sample weight of 1.08 g of tissue obtained aerodynamic way, have vertically, so that approximately 2.54 cm (1 inch) layer obtained by the aerodynamic method, were immersed in water. After 1.5 hours the sample is removed from the water, allow the water to drain for 10 C and weighed. The sample obtained aerodynamic method, has a mass equal 12,45 g, which meant that he had absorbed 11,37 g of water, 10.5 g of water per 1 g of tissue obtained aerodynamic method.

Sample capable of capillary absorption

On another tissue sample obtained aerodynamic method, in this case, more light, spray glue and sprinkle particles superficiales material FAVOR® 880. This sample is applied to 0.67, This procedure is carried out on the other side of the same sample obtained by the aerodynamic method. On W is the ROI side cause of 1.57,

Material structure (fabric obtained aerodynamic method)/(superficiali material) is placed on the sample unilateral CERs (the same as in Example 1). The amount of CERs equal to 15.24 cm (6 inches) in the direction in which do not carry out the hood, and 10,12 cm (4 inches) in the extrusion direction, where the direction in which do not hold the hood is a longitudinal direction of the layer obtained by the aerodynamic method. CER is folded over the end of the layer obtained by the aerodynamic method, and three edges welded together, leaving a surplus of material obtained aerodynamic method acting of CERs approximately 5.1 cm (2 inches). The width of the adhesive layer is about 2.5 cm (1 inch). The sample was then able to capillary absorption, weld using a Carver press at a pressure of 1000 pounds/inch2within 5 seconds and a little cut to dimensions of about 7.6 cm by 6.3 cm (3 inches by 2.5 inches). Sample capable of capillary absorption, has a mass equal to 5.45,

Sample capable of capillary absorption, have vertically, so that approximately 2.54 cm (1 inch) material obtained aerodynamic method, were immersed in water. After 5 min the sample capable of capillary absorption, has a mass equal to 21.6 g, which means that he has absorbed 16.2 g of water. After 1 min the image is placed in initial position and after another 5 minutes he possesses mass equal 33,23 g, and absorbs 27.8 g of water. After 1 min, the sample in the same way again immersed for 5 min, and it has a mass equal to 55 g, and absorbs of 49.6 g of water. The bottom piece welded layered material starts to break down, so the test will be terminated.

Under the assumption that they are capable of capillary absorption of the sample layer, the obtained aerodynamic method, contains the same amount of water as control sample, it turns out that the sample is capable of capillary absorption, contains 17 g of water per 1 g superficiales material. Source package CER has a thickness equal to about 0.2 cm (0.08 in), and after testing he has a thickness equal to approximately 2.3 cm (0.92 inch).

When the swelling superficiales material outer layers CER expand, allowing you to continue capillary absorption in the layer obtained aerodynamic method because it is not destroyed when the extension superficiales material.

It is assumed that in this embodiment of the present invention it is important that maintained good contact between superficialis material and environment, capable of capillary absorption, so do not lose the ability to transfer fluid to the environment, capable of capillary absorption. To attach superficiales material to the environment, posebnoj to capillary absorption, you can use glue or adhesives.

In yet another embodiment of the present invention a layer of Example 2, the obtained aerodynamic method was able to lamination to be sosborn in some way, for example, by craigrownie that allows the layered material to stretch.

As should be clear to experts in a given field of technology changes and modifications of the present invention are within the competence of specialists in this field of technology. Examples of such changes are contained in the above patents, each of which in its entirety is included in the present invention by reference to the extent consistent with the present invention. Applicants believe that such changes and modifications are included in the scope of the present invention.

1. The subject of personal hygiene which includes absorbent inner part, with this system absorbing inner part to maintain the integrity of the pores and the appropriate distribution of pore sizes within the time period includes the first elastic outer layer and second outer layer located on the side opposite to the specified elastic outer layer, and between these layers is an absorbing material, the layers above absorbent inner part of the connection is tive to each other using a communication in the form of a pattern, to hold the absorbent material in approximately the same place when the system is moved, and this system absorbing inner part is able to expand to provide extended absorption or capillary absorption of liquid.

2. The subject of personal hygiene according to claim 1, wherein said absorbent layer includes superficiali material and cellulose.

3. The subject of personal hygiene according to claim 1, wherein said absorbent layer includes superficiali material and synthetic fibers.

4. The subject of personal hygiene according to claim 1, wherein said second outer layer is tensile.

5. The subject of personal hygiene according to claim 1, wherein said elastic layer is made of a polymer selected from the group comprising polyurethanes, copolymers of esters and amides, polyesters, polyamides, copolymers, esters and ethers and polyolefins.

6. The subject of personal hygiene according to claim 1, wherein said second outer layer is elastic.

7. The subject of personal hygiene according to claim 1, wherein said second outer layer is off not stretched.

8. The subject of personal hygiene according to claim 1, wherein said elastic layer is selected from a group comprising a perforated film, woven materials, nonwoven materials and mesh materials.

9. The subject of personal hygiene of claim 8,further comprising another elastic layer, associated with the specified first elastic layer with the glue of stretchy latex.

10. The subject of personal hygiene according to claim 1, wherein said elastic layer is a layered material selected from the group comprising molded with the hood in the neck laminates, molded hood laminates, molded with the hood in the neck and hood laminates and molded with hood layered materials with zero extension.

11. The subject of personal hygiene according to claim 1, additionally comprising a layer capable of capillary absorption, located between the said outer layers.

12. The subject of personal hygiene according to claim 11, wherein said layer capable of capillary absorption, manufactured in accordance with a method selected from the group comprising spunbond production method, the method of manufacture of carding and aerodynamic method.

13. The subject of personal hygiene according to claim 1, wherein said second outer layer comprises fibers made of polyolefin.

14. The subject of personal hygiene which includes absorbent inner part, with this system absorbing inner part to maintain the integrity of the pores and the appropriate distribution of pore sizes within the period of time includes a layer capable of capillary absorption, sod is Rashi superficiali material, attached to at least one side of at least one elastic outer layer and at least one vlagopronitsaemym outer layer, whereby said system absorbing inner part is able to expand to provide extended absorption or capillary absorption of liquid.

15. The subject of personal hygiene on 14, wherein said elastic outer layer is moisture-permeable.

16. The subject of personal hygiene on 14, wherein said layer capable of capillary absorption, manufactured in accordance with a method selected from the group comprising spunbond production method, the method of manufacture of carding and aerodynamic method.

17. The subject of personal hygiene on 14, wherein said elastic layer is a layered material selected from the group comprising molded with the hood in the neck laminates, molded hood laminates, molded with the hood in the neck and hood laminates and molded with hood layered materials with zero extension.

18. The subject of personal hygiene which includes absorbent inner part, with this system absorbing inner part to maintain the integrity of the pores and the appropriate distribution of pore sizes within the periods of the time includes the obtained aerodynamic method layer, capable of capillary absorption, having a weight per unit area equal to from 17 to 170 g/m2(from 0.5 to 5 osy), with the specified layer capable of capillary absorption, at least on one side contains superficiali material, and at least one vlagopronitsaemym outer layer of molded with the hood in the neck of the layered material, having a weight per unit area equal to from 17 to 170 g/m2(from 0.5 to 5 osy), whereby this system absorbing inner part is able to expand to provide extended absorption or capillary absorption of liquid.

19. The subject of personal hygiene which includes absorbent inner part to maintain the integrity of the pores and the appropriate distribution of pore sizes within a period of time, and this system absorbing inner part includes an absorbing material placed in vlagopronitsaemym elastic material, the system absorbing inner part is manufactured the location of absorbent material on the elastic material and wrapping an elastic material, to include absorbent material, with getting ready absorbent system.

20. The subject of personal hygiene which includes absorbent inner part to maintain the integrity of the pores and the appropriate distribution of the population of the pore size within a period of time, while this system absorbing inner part includes a first elastic outer layer and second outer layer located on the side opposite to the specified elastic outer layer, and between these layers is an absorbing material, the layers above absorbent inner parts are connected with each other by means of connection in the form of a pattern in order to hold the absorbent material in approximately the same place when the system is moved, and, in addition, this system has a thickness in the dry state, and a thickness in the wet state, and elongation in the dry state, and elongation in the wet state, and the specified thickness in the wet state of at least 3 times greater than the specified thickness in the dry state, as specified elongation in wet and dry conditions are approximately the same, whereby said system absorbing inner part is able to expand to provide extended absorption or capillary absorption of liquid.

21. The subject of personal hygiene according to claim 20, wherein said second outer layer is elastic.



 

Same patents:

FIELD: medicine, hygiene.

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FIELD: medicine.

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24 cl, 9 dwg, 5 tbl, 4 ex

Dressing material // 2270646

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21 cl, 2 tbl, 2 ex

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24 cl, 12 dwg

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23 cl, 18 dwg, 5 tbl

FIELD: medical engineering.

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5 cl, 1 tbl

FIELD: hygienic items, in particular sanitary towels.

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24 cl, 9 dwg, 5 tbl, 4 ex

FIELD: medical equipment; traumatology; orthopedics.

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1 dwg

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EFFECT: provision for producing of high-quality and high-strength article convenient in use.

FIELD: medicine, in particular, means and methods for closing of wound or incision.

SUBSTANCE: dressing has first flat flexible component with adhesive layer on its lower surface and number of first elongated connection members extending in first direction from one of edges of said component, second flat flexible component with adhesive layer on its lower surface and one or more second elongated connection members extending in second direction substantially opposite to said first direction, from one of edges of said component, first tension member joined with first elongated connection members, second tension member joined with second elongated connection members, means for attachment of first elongated connection members on second flat flexible component, and means for attachment of second elongated connection members on first flat flexible component. Elongated connection members are spaced from one another by distance sufficient for positioning of first flat flexible component relative to second flat flexible component in a manner allowing edge of first flat flexible component to be arranged in parallel with edge of second flat flexible component during closing of wound or incision. Method involves attaching first flexible component of dressing with its lower surface on patient's skin surface along first edge of wound, and attaching second flexible component with its lower surface to patient's skin surface along second edge of wound; simultaneously tightening first and second tension members for closing of wound or incision; fixing first elongated connection members on second flexible component and fixing second elongated connection members on first flexible component.

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20 cl, 6 dwg

FIELD: medical engineering.

SUBSTANCE: device has liquid-permeable porous lining that is to be placed on or in a wound, flexible plastic film having a set of holes distributed over its surface, liquid-impermeable film napkin and connection means. The porous lining has foamed polymer material having interconnecting cells. The plastic film makes contact with porous lining surface and is between wound surface and the lining when used. The film napkin is placed above the porous lining and is sticky along its perimeter to provide sealing in skin area surrounding the wound. The connection means passes through the film napkin and communicates to porous lining via liquid flow for making connection to negative pressure source for stimulating fluid flow discharged from the wound. Another embodiment has removable wound bandage usable in particular for treating large wounds requiring draining fluids. It has the first porous lining, the second porous lining, elastomer envelope, film napkin and tubular connection means. The first liquid-permeable porous lining contacts the wound and has foamed lining having foamed material based on polymer built of interconnecting cells and isolated transverse holes. The elastomer envelope has the first and the second sheets of elastomer film soldered along their periphery and enveloping said foamed lining. Each of the first and the second elastomer film sheets has spaced-apart holes. The holes in the second sheet are justified with said spaced-apart holes in the first sheet. The second liquid-permeable porous lining is to be placed under the first porous lining. It has foamed polymer material having interconnecting cells. The liquid-impermeable film napkin is placed above the second porous lining. The first porous lining is placed above the wound. The film napkin is sticky along its perimeter to glue the napkin to skin area surrounding the wound. The tubular connection means passes through said film napkin and communicates to porous lining via liquid flow for making connection to negative pressure source for stimulating fluid flow discharged from the wound. The third embodiment has the first elastomer film sheet having spaced-apart holes deviated from spaced-apart holes in the foamed lining. The second elastomer film sheet has spaced-apart holes adjusted to the spaced-apart holes in the foamed lining.

EFFECT: simplified usage; accelerated wound healing.

15 cl, 3 dwg

FIELD: medical engineering.

SUBSTANCE: device has longitudinal direction and transverse direction. Two lateral edges of essentially longitudinal direction have superficial layer permeable for liquid, superficial layer impermeable for liquid and absorbing member placed between the superficial layers. The absorbing member has compressible absorbing material layer. The absorbing material layer has at least one fold running in longitudinal direction, the fold being at least partially pressed giving to the compressible absorbing material layer greater density in the fold vicinity than in the compressible absorbing material layer areas outside the fold. The fold has swelling properties when being wetted and/or subjected to mechanical treatment and it reshapes at least partially into its original shape assumed before being pressed.

EFFECT: reduced risk of leakage; arrangement kept unchanged irrespective of usage mode.

12 cl, 13 dwg

FIELD: medical engineering.

SUBSTANCE: device has longitudinal direction and transverse direction, two lateral borders arranged essentially in longitudinal direction, anterior part, posterior part, the first surface and the second surface, absorbing member placed between the first surface and the second surface. The absorbing member has essentially triangular shape, its anterior part being wider than the posterior one. The absorbing member also has the basic absorbing region arranged in the article plane in a way that at least 85% of its total absorbing capacity is concentrated in the anterior three-fourth of the article length and at least 70% of its total absorbing capacity is concentrated in the anterior half of the article.

EFFECT: wide range of functional applications.

9 cl, 3 dwg

FIELD: medicine.

SUBSTANCE: the present innovation deals with absorbing product that has both longitudinal and cross-sectional directions, two lateral edges coming, essentially, longitudinally, anterior part, posterior part, the first surface and the second surface and absorbing element located between the first surface and the second one. Absorbing element has the area for liquid accumulation and that of secondary absorption, moreover, the latter contains parts which completely surround the area of liquid accumulation, the layer of liquid-impermeable material is located on the second surface of absorbing product and, essentially, within the area of liquid accumulation only. The innovation also, deals with the method to obtain an absorbing product. Area of liquid accumulation should have high absorbability capacity and good capacity for liquid accumulation and distribution.

EFFECT: higher efficiency.

12 cl, 4 dwg

FIELD: medical engineering.

SUBSTANCE: device has foam tampon to be introduced into a wound area and material for covering the wound and sealing the foam tampon in the wound area. The foam tampon communicates to vacuum source via flowing medium to help draining the flowing medium. The foam tampon is impregnated with basic fibroblast growth factor and antimicrobial factor.

EFFECT: accelerated wound healing.

9 cl, 1 dwg

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