Breathing is not permeable to liquid composite material

 

The invention relates to breathable not permeable to liquid composite material, method of its production and layered material, this material can be preferably used as loopy component of the clasps on the basis of hooks and loops type VELCRO for use in products ranging from fasteners for shoes and gloves to Golf and many other products in which it is desirable non-permanent connection. The composite material includes pre-associated non-woven fabric having a pattern of binding in the form of separated intervals of points linking with unrelated threads or fibers between the points of bonding, the film is attached to the canvas in places corresponding to the points of bonding, and basically almost not associated with the canvas. The material passes water vapor at a rate of about 100 g/m2/24 h and can withstand a hydrostatic pressure of at least 50 mbar water. The method of obtaining this material includes obtaining a pre-associated non-woven cloth having a pattern of binding in the form of divided intervals of the points of binding and unbound fibers or filaments between them, getting breathable film, getting word the indicated points of the binding. Layered material includes a film and a nonwoven fabric in which the fabric is spot connected, and the film has a high degree of adherence to the canvas at the point of binding, in which the material is characterized by the same parameters as composite material. The invention provides increased comfort, protection and fit. 3 S. and 13 C.p. f-crystals, 7 Il.

This invention relates to composite materials having a breathable protective properties and is especially useful when used as a component of the clasps on the basis of hooks and loops, typical examples of which are products that are widely available firm VELCRO INT. (VELCRO INT.) and which is currently available from many sources, for use in products ranging from fasteners for shoes and gloves to Golf and many other products in which it is desirable non-permanent connection. Such fasteners based include details in the form of hooks and loops, which, clenching them together, are concatenated in such a way that is not amenable to shifting effort, but can be separated by applying a little effort on a breakaway. The design of these components was quite a difficult and provides loops. For use in many products with low cost, such as fasteners for disposable garments such as diapers and clothing for adults suffering from incontinence, there was a need to develop low-cost methods of production and materials for such fasteners which, however, would satisfy the requirements of efficiency. Especially for such products, in which loopy component also serves as the substrate material, it is extremely desirable that it was not only breathable to provide comfort, but also served as a barrier to prevent leakage. This invention is ideal loopy material for fasteners, especially suitable for use in disposable products.

Prior art In the prior art there are many clasps on the basis of hooks and loops and components for such fasteners, which are used in disposable products such as disposable diapers and the like. Just as an example, may be made by reference to U.S. patent 5614281, which presents a lot of information on this prior art, which to this end is fully included here as a researcher is 122, in U.S. patent 5326612, in U.S. patent 5595567 and in U.S. patent 5647864. Briefly, especially cheap loopy component can be obtained according to the methods of obtaining non-woven fabrics, such as methods of twisting, which give the opportunity to get a great area of the canvas between the points of bonding, where the fibers are not connected to each other and are available to lead hooks complementary U. components. Factors such as the configuration, number and surface area relationships in non-woven cloths, as well as the choice of specific details with hooks, can be varied to achieve the desired level of strength and other properties within the specified value. Moreover, the choice of polymer or other composition ingredient for non-woven and/or hook parts can affect the efficiency and/or cost clasps with this application. There is a need to loopy component for fasteners, which may have certain properties, such as tensile strength, shear strength and the ability to re-fastening and breathable protective functions at that price, which would allow to use them as material for the substrate in disposable products. The other is the cue capes and robes for example, will be obvious to experts in this field.

Brief description of the invention This invention relates to a breathable impervious to liquid composite material is particularly suitable for use as loopy component for fasteners, which include layered material consisting of a layer of film and pre-associated non-woven layer, where the layered material bound at the point of binding pre-associated non-woven cloth, leaving the fibers or filaments between such points linking unrelated. To achieve increased comfort and best use as a component of the lining in personal care products such as disposable diapers, for example, a laminated material has the ability to breathe, having a transmission rate of water vapor of about 100 g/m2/24 h and can withstand a hydrostatic pressure of at least 50 mbar water. When used with complementary hook part, loopy item derived from such a composite material, provides the ability to zastaivaetsya anywhere in the substrate of the product and, consequently, the ability to re-zastaivaetsya for some period of time and in techinican number of times. The nonwoven layer has a pattern of binding to repetitive or varied executions point link, which gives a disjoint area of at least 70%, 100 inches square non-woven surface. In addition, the frequency of binding gives the density of the pattern in the range of from about 50 to about 200 links per inch2covering from about 5 to about 30% of the area, preferably from about 10 to about 25%. The film layer is either layered or obtained by joint extrusion structure with an open layer of soft amorphous polymer, or a single-layer structure, in any case, being predominantly microporous barrier to liquids, and is comfortable and compatible with a nonwoven. The application of the layered material can be carried out using heat and pressure, using an amorphous polymer or as a layer in a multilayer film, or a separately applied bonding layer in the case of a single-layer film, for example. To increase the aesthetic qualities and enhance the adhesion of hook parts with loopy detail, tied layered material can be obtained by stretching the film before applying the laminate to the nonwoven fabric, and further weakening or contraction, with the con between related areas, where film and non-woven fabric remain firmly attached. The invention also includes a method of obtaining loopy parts for zipper.

Detailed description of the invention Definitions In this specification, the following terms have specific meanings, unless the context requires another meaning, or are not other values; also, only the number usually includes the plural and the plural form usually includes the singular, unless otherwise indicated.

The term "nonwoven fabric" means a fabric made of fibers or filaments, which are obtained by methods other than knitting or weaving, and which has a communication between some or all of the fibers or threads of; such links can be formed, for example, using heat bonding, gluing, or mechanical bonding, such as pneumoperitoneum.

The term "fiber" means an extra-long strands of a certain length, such as staple fibers obtained by cutting a continuous strand on a separate part of the length, for example, from 2 to 5 refer to the Set of fibers may be the same or different lengths.

The term "thread" usually means a continuous strand, which has a significant correlation length and ucaut by melt extrusion of the polymer into strands, that cool and collected typically by air supplied at high speed, to pull the fibers that are collected on the forming surface and bind, often on a particular model using heat and pressure. Methods twisting described, for example, the following patents are referred for more details: U.S. patent 4340563, U.S. patent 3802817 and U.S. patent 3692618.

The term "loop" refers to the area of separation, at least one of fibers or filaments in the nonwoven fabric and includes, but is not limited to, a configuration where the same fiber or filament cross themselves; i.e., not necessarily to get a complete circle or oval, for example.

The term "complementary hooks" means a structure that is adapted for use as a component of a mechanical fastener and having such protrusions profile, height, density, geometry and orientation, feel free to join parts with loops fastener of the present invention and to provide the required level of strength and tensile shear. The protrusion does not necessarily has the form of a "hook", and may have other configurations, such as the shape of a mushroom, for example. Suitable materials with hooks can be AGNONA the ETP and the hooks have a height of from about 0.00254 cm to about 0.19, see They are commercially available, for example, Velcro Int., Manchester (Velcro Int., Manchester) and ZM, Art. Floor (SM, St. Paul).

The term "amorphous polymer" when used to describe the bonding layer, which is either a component of a multilayer film, or a separately applied layer, refers to a thermoplastic polymer, such as certain polyolefin with a density in the range of from about 0.85 to about 0.89 as of low crystallinity, for example, less than 30%, which are often used as components of adhesives and who have limited properties of hot-melt adhesive.

The term "thermal point linkage includes a transmission link of a cloth or fabric fibers between heated calender and resistant roller. The calender has such a shape that the canvas was not connected along its surface. As a result, functional and aesthetic indicators was developed many models calenders. The specialist in this area should be clear that the percentage of the related area, if necessary, describes or approximately in the interval, since the connecting rods are usually narrow and wear out over time. Also to the person skilled in the art will understand that references to "studs/inch2" and "links the ski of the same size and surface and the thrust rods. One example of a dot pattern of binding is the pattern type Hansen and Pennings or "Hip" (Hansen Pennings or "H&P"), which has about 30% associated square and about 200 ties/square inch, is described in U.S. patent 3855046. Pattern "Hip" provides, in the presence of square rods or point link, where each core may have a size of 0.038 inches (0,965 mm), for example, providing about 30% of the related area. Another common pattern dot binding is stretched Hansen and Pennings or rip" (expended Hansen Pennings or "EHP"), which gives the related area of from about 15% to 18%, and provides for the presence of square rods with a side 0,037 inches (0,94 mm), for example, and a density of about 100 rods rods/inch2.

Another common pattern dot binding pattern is designated as "714", which has a square point link, and where each core can have side is 0.023 inch (0,584 mm), for example, and the related area of from 15 to 20% and about 270 studs/inch2. Other common patterns include a diamond pattern like "Remix" ("Ramisch") with repeated points in the form of lozenges that have related in size from 8 to 14% and 52 of the rod/inch2and also the pattern in the form of intertwined links/inch2. Usually a percentage of the related area varies widely from about 10 to about 30% of the area of the leaf lamina, and the number of rods per inch2can also have a wide range. From an almost unlimited number of combinations of configurations of the binding, in this invention, however, can be used only selected patterns. They should have a size associated surface from about 5 to about 30%, preferably in the range of from about 10 to about 25% and the frequency of binding in the range of from about 50 to about 200 per square inch, preferably in the range of from about 75 to about 125 per square inch. In this description, the term "pre-connected" nonwoven fabric refers to those non-woven fabrics which have been linked by the models used in this invention according to these parameters. As is well known in the art, scatter binding holds the layers of the laminate together, and gives integrity to each individual layer by bonding filaments and/or fibers within each layer.

Methods of testing Hydrostatic pressure. Measurement of the tightness of the cloth for liquid represents the hydrostatic test pressure. Test gidrostaticheski the amount of water held inside of it. Higher hydrostatic pressure show that the painting is the best protection against the penetration of liquids than the canvas with a lower index of hydrostatic pressure. The hydrostatic test pressure is conducted according to the method of "Federal test standard A, Method 5 514".

Tensile test with exciting devices: tensile Test with exciting devices is a measurement of the tensile strength and relative elongation or stretching of the fabric when it is subjected array voltage. This test is known in the art and is subject to the technical conditions of the methodology the methodology of the "Federal test standard A, Method 5100". The results are expressed in pounds or grams in determining the tensile strength and percentage when determining the stretch before breaking. Higher numbers mean more durable, more stretchable canvas. The term "load" means the maximum load or force, expressed in units of weight required to rupture or cracking of the sample when conducting a tensile test. The term "total energy" means the total energy below the curve of load versus relative UDA during the tensile test.

In a tensile test using exciting devices use two clamps, each of which has two lips, each lip has a surface in contact with the sample. The clamps hold the material in one plane, usually vertically, at a distance of 3 inches (76 mm) and stretch with a certain velocity stretch. The values of tensile strength and elongation testing with exciting devices receive, using a sample size of 4 inches (102 mm) by 6 inches (152 mm), the size of the surface of the lip in contact with the sample 1 inch (25 mm) 1 inch (25 mm) and a constant rate of elongation of 300 mm/min. and that the sample is wider than the lips of the clamps allows to obtain results, which are typical indicators of the effective strength of the fibers in the clamped piece of the sample in combination with the additional strength of the adjacent fibers of the canvas. The sample is clamped, for example, in a test device Sintech 2 (Sintech 2) from the company Syntech Bldg. (Sintech Corp.), in the test device Instron Model TM (Instron Model TM) from Instron Bldg. (Instron Corp.) or Thwing-albert Model INTELLECT II (Thwing-Albert Model INTELLECT II) from Thwing-albert instruments Co. (Thwing-Albert Instrument Co.). These test devices are almost completely in the s are average for the three tested in the transverse direction (NVD) or towards (LC) samples.

Tensile test strips: tensile test strips similar to a tensile test using exciting devices and measure the maximum and damaging the load and the percentage of maximum and destructive stretching of the cloth. In this test the load (strength) is measured in grams and elongation in percent. In a tensile test strips of the two clamps, each of which has two lips, each lip has a surface in contact with the sample, hold the material in one plane, usually vertically, at a distance of 3 inches (76 mm) and stretch it with a certain velocity stretch. The values of tensile strength and elongation of the strips get, using a sample size of 3 inches (76 mm) by 6 inches (152 mm), the size of the surface of the lip in contact with the sample 1 inch high (25 mm) to 3 inches (76 mm) width and a constant rate of elongation of 300 mm/min For the test can be used testing device Sintech 2 (Sintech 2) from Sintech Bldg. (Sintech Corp.), Instron Model TM (Instron Model TM) from Instron Bldg.(Instron Corp.) or Thwing-albert Model INTELLECT II (Thwing-Albert Model INTELLECT II) from Thwing-albert instruments Co. (Thwing-Albert Instrument Co.). Results presented are the average for the tre is peeling: When testing the layered material to flaking or delamination determine tensile, at which layers of the layered material will pull away from each other. Values of strength obtained using a certain width, the width of the lips clamping and constant velocity stretch. For samples with foil on one side, the side of the sample is covered with adhesive tape for masking or any other suitable material to protect the film from a ruptured during testing. Sticky tape for masking is applied only on one side of the layered material, and therefore it does not affect the tensile strength of the sample. In this test use the two clamps, each of which has two lips, each lip has a surface in contact with the sample, to hold the material in one plane, usually vertically spaced from each other beginning at a distance of 2 inches (50.8 mm). The sample has a width of 4 inches (102 mm) and maximum length required for adequate stratification of the sample. The size of the surface of the lip in contact with the sample, is 1 inch (25.4 mm) in height and at least 4 inches (102 mm) in width, and speed constant tension is 300 mm/min Sample rasclaat manually in such a way that he could be caught in a particular p is the style tear when the separation of the two layers 180oand the tensile strength is presented as the average value of the maximum load in grams. Measurement efforts begin at break of layered material 16 mm and continue until, until you have layered all 170 mm For this test can be used testing device Sintech 2 (Sintech 2) from the company Syntech Bldg. (Sintech Corp.), Instron Model TM (Instron Model TM) from Instron Bldg. (Instron Corp.) or Thwing-albert Model INTELLECT II (Thwing-Albert Model INTELLECT II) from Thwing-albert instruments Co. (Thwing-Albert Instrument Co.). The sample may be tested in the direction transverse to the direction of production (NVD) and towards (HB).

Test abrasion by the method of Martindale (Martindale): this test determines the relative resistance of cloth abrasive wear. The test results are presented on a scale from 1 to 5, where 5 means minimal wear, and 1 is the greatest wear after 120 cycles with a weight of 1.3 pounds per square inch (0.09 kg per square centimeter). The test is performed using a testing device Martindale VEA and Abraison Tester (Martindale Wear and Abrasion Tester) model 103 or model 403 from James Ash. Hilo & company, West Yorkshire, UK (James H. Heal & Company, Ltd, West Yorkshire, England). Used ADB is tiny, reinforced fiberglass with a rubber hardness of a surface on the Durometer Durometer, shore a 81 (Durometer, Shore A of 81), plus or minus 9. Abrasive commercially available from Flight Insulin Inc., (Flight Insulation Inc.) distributor Connecticut Hard rubber end (Connecticut Hard Rubber).

Basic weight: basic weight described here various materials is determined according to the procedure of the Federal test procedure (Federal Test Method No. 191A/5041. The size of samples of the test materials is 15,2415,24 cm, and for each material receive three values, which then lead to the average. The results presented below are averages.

Test lead hooks: a study of peel strength at 180odesigned to measure how well the hooks and loops are concatenated with each other, and it involves attaching hook material to the loopy fastener material on the basis of hooks and loops, and then tearing off hook material from loopy material at an angle 180o. The maximum load recorded in grams as an average for the three highest maximum load required to separate or separation of one material from another. For the verification is passed as Syntech Systems 2 Computer integrated Systems (Sintech System 2 Computer Integrated Testing System) from Sintech Inc., (Sintech Inc.), with offices in research of Triangle Park, N. To. (Research Triangle Park, N. C.). Use the sample loopy material size 3 inches (7.6 cm) to 6 inches (15.2 cm). Sample hook material size 2.5 inches (6.3 cm) wide, which securely with glue and ultrasound attached to virtually inelastic, non-woven material, equipped with hooks down and put on the upper surface, closing loopy material, in which approximately 1 inch (2.54 cm) remains free.

To ensure a satisfactory and uniform coupling hook material with loopy material use push machine Model L W 1 (Model LW 1), the series number 14-9969 from Atlas electric of Devices Co., Chicago, IL. (Atlas Electric Devices Co., Chicago, IL) for squeezing the United loopy and hook materials for one cycle, where one cycle is equivalent to passing through the push machine using the total weight of 40 pounds (18,144 kg). One end of the material, which is the substrate for hook material, carefully secured in the upper lip device for testing the tensile and the end loopy material located in the direction of the upper lip, bent down and carefully secured in the lower lip which I test in tension should be such, so there was only minimal sagging of the respective materials and the base length of the sample was 3 inches (7.6 cm) to actuate the device for testing the stretch. The hooks of the hook material is oriented in a direction generally perpendicular to the intended direction of movement of the lips of a device for testing the stretch. Device for testing the tensile operate at a constant speed of separation of 500 mm per minute and then record the maximum load in grams required to detach or tear hook material from loopy material at an angle 180obased on the average for the three highest peaks.

Test shift hooks: dynamic strength test shear includes a coupling hook material with the loopy fastener material on the basis of hooks and loops, and then pulling the hook material along loopy material. The maximum load required to release the hooks and loops, measured in grams. This test requires testing device with constant velocity stretching with a total load of 5000 g, such as Sentech Systems 2 Ohms is m) by 6 inches (15.24 cm) attached with masking tape to mask to the flat surface of the substrate and then cut into half in the shorter direction. Sample hook material size 2.5 inches (6.35 cm)0.75 inch (1.9 cm), which securely with glue and ultrasound attached to virtually inelastic, non-woven material, equipped with hooks down and put on the upper surface of loopy material, centered in the shorter direction at a distance of 2 inches (5.08 cm) from the cut edge.

To ensure a satisfactory and uniform coupling hook material with loopy material used on push car. Model L W 1 (Model LW 1), the series number 14-9969 from Atlas electric of Devices Co., Chicago, IL. (Atlas Electric Devices Co., Chicago, IL) for squeezing the United loopy and hook material during one cycle, where one cycle is equal to the transmission in HB (longer dimension) through push machine using the total weight of 40 pounds (18,144 kg). One end of the material, which is the substrate for hook material, carefully secured in the upper lip device for testing the tensile and the end loopy material located in the direction of the lower lip, carefully secured in the lower lip device for testing the stretch.

The accommodation is suitable is the minimum slack of the respective materials to activate the device for testing the stretch. The hooks of the hook material is oriented in a direction generally perpendicular to the intended direction of movement of the lips of a device for testing the stretch. Device for testing the tensile actuate when the base length of 3 inches (7.6 cm) and with the speed of the slide 250 mm per minute and then record the maximum load in grams required to detach or hook material from loopy material, based on the average of the highest peaks for the three samples.

A brief description of the drawings Fig.1 shows a diagram of the process of obtaining loopy material for fasteners according to this invention.

In Fig. 2 shows a cross-section of a variant of loopy material for fasteners according to this invention.

In Fig. 3 shows loopy material for the fastener of the present invention, is used as the substrate of the subject of personal hygiene.

In Fig.4 shows one form of binding used in this invention.

In Fig.5 shows a second form of binding used in this invention.

In Fig.6 presents a photograph taken with increased approximately 20-fold, demonstrating compositio yranny fibers.

In Fig. 7 presents a picture similar to the pictures in Fig.6 another composite material of the present invention.

Detailed embodiments of the invention the invention described with reference to the drawings and examples, which illustrate certain embodiments of. Specialists in this field will be clear that these options do not limit the scope of the present invention, which can be widely applicable in the form of options and equivalents, which may be covered are represented by the claims. It is understood that the invention encompasses all such variations and equivalents.

According Fig.1 illustrated, the process begins with a film filled with 10, which is unwound from the shaft 12 and is pre-heated, for example, through interaction with the heated rotating drums 14, 16. The temperature to which the heated film 10 depends on the composition of the film, as well as the ability to breathe and other desired end properties of the composite material. For example, for loopy fasteners, the degree of tightening will affect the size of the loops. In most cases, the film is heated to a temperature not higher than 10oTo lower its temperature, Pavlenko. The heated film stretch towards the device orientation in the direction 18, which includes rotating shafts 20, 22 and the corresponding pinch rollers. The shaft 22 moves faster shaft 20, which allows to stretch the film in the direction (the"direction" or "NV"). The degree of stretching depends on the desired final properties of loopy fasteners, but, usually, stretch film, at least about 300% of its original length, but the degree of stretching should be less than this, which can cause defects in the film. For most products with films based on polyolefins, for example, the stretch should be at least 200% of the original length of the film, and often in the range of from about 250% to 500%. The stretched film 24 stretch over supporting rollers 26, 28 through an optional device for linking 27, in which the applicator 30 causes the amorphous polymer, for example, polyolefin resin 32, if desired. As will be described in detail hereinafter, the application of amorphous polymer is not necessary for certain embodiments of the present invention, in which it is already included in the composition of the film layer, and, in such cases, the device for sweni layer 34 is pre-associated non-woven cloth unwound from the shaft 36 and combined with the stretched film 24 before passing through the pressure roller 38. After passing through the pressure roller 35 two layers weaken, with or without heating, and layered material wrapped with a reduced speed, for example, 80-90% below the speed of the pressure roller, around the rotating shaft 40, which moves with such speed that allows you to pull the tape 24 with shirring top layer 34. After the shaft 40 of the United layers annealed using the heated shaft 42, which moves at the same speed as the shaft 40, thus avoiding significant additional stretching. The temperature of the annealing varies depending on the desired final properties of the material looped zipper and composition of the layers, but may be, for example, within the 15oWith the temperature used for stretching. After annealing the combined layers can be cooled, for example, using air scraper 43 or cooling cylinders, if desired, or collected directly on the shaft 44, or directed to a conveyor for inclusion in the composition of personal hygiene items. Although not shown, this process may be included stage of application of the relief, if desired, to give a composite material attractive shape by using, for example, transmission of a composite material between Rei will be clear, the above-described process can be adapted for many films and outer layers to obtain breathable protective loopy material for fasteners, with widely varying properties. For effective use as a loopy material for the fastener of the present invention, however, when selecting these components, it is desirable to take into account some factors. The film, for example, with a light weight should be strong enough to withstand stage of the process required to obtain the desired flexibility and softness, and also must have a low cost. In addition, the film should be able to effectively communicate with the external layer and to maintain the protective properties and speed of the transmission pair. For many options, it is desirable that the stretched film was provided by the opacity of the composite material.

Films that meet these requirements include polymers, such as polyethylene, polypropylene, a mixture comprising polyolefin and copolymers, such as copolymers of ethylene and propylene, for example, generally have a basis weight in the range of from about 10 to about 50 g/m, for use as loopy material, preferably in intercal Dowlex2535, 3347 and 3310, Affinity5200 from the Dau Chemical company, Midland, Michigan, Dow Chemical Company, Midland, Michigan). The composition of the films preferably contain up to 40 wt.% filler such as calcium carbonate, and preferably from about 45 to about 65 wt.% such a filler. Examples include calcium carbonate Supercoatfrom the English Rite clay, Sylacauga, Alabama (English China Clay, Sylacauga, Alabama), which has a coating of about 1.5 wt.% stearic acid or beganovi acid to improve the dispersion of the filler. Examples of particularly preferred films include jointly extruded film having on one or both sides of a thin outer layer of the amorphous polymer, such as saturated with propene polyalphaolefins terpolymer or copolymer, which enables binding to the outer layer without applying a separate bonding layer. An example is the polymer by Catalloy (Catalloy) from Montell USA, Inc., Wilmington, Delawar (Montell USA, Inc., Wilmington, Delaware), which is a product of multi-stage reaction of olefin, in which a statistical copolymer of ethylene propylene molecular dispergirovannogo monomer, an example of which is described in U.S. patent 5300365. In addition, a layer of amorphous polymer can also include hot-melt glue or other amorphous polyolefin resin, which preferably have a ratio of melt viscosity of 100,000 MPac or more, in number, for example, up to 50 wt.% from the polymer fraction, if only while retaining the above-described breathable protective properties. For use in this invention is suitable commercially available amorphous poly-alpha-olefins, such as are used in hot-melt adhesives, and which include, but are not limited to, REXTACethylene-propylene-part APAO see APAO E-4 and E-5 and a butylene-propylene VM-4 and BH-5 and REXTAC2301 from RAXEN Bldg., Odessa (Rexene Corp., Odessa), TX and VESTOPLAST792 from Huls AG, marl, Germany (Huls AG, Marl, Germany). These amorphous polyolefins are usually synthesized by using a catalyst on the substrate Ziegler-Coloring and alkyl aluminum socializaton, and olefin, such as propylene, polimerizuet with varying amounts of ethylene, 1-butene, 1-hexane, or other materials with obtaining predominantly atactic hydrocarbon goal is inthe USA 5539056 and U.S. patent 5596052, which are fully incorporated here as a reference, and polyethylene, such as AFFINITYEG 8200 from the Dau Chemical, Midland, Michigan (Dow Chemical, Midland, Michigan) and EXACT4049, 4011 and 4041 from Exxon, Houston, TX (Exxon, Houston, TX), and mixtures including one or more substance to increase the stickiness and KRATONfrom Schell Chemical camp., Houston Texas (Shell Chemical List. , Houston, Texas). Composite material and the binding layer on only one side may have the advantage of higher speed transmission pair, if desired. Such films are described in more detail in co-assigned application for U.S. patent, serial 08/929562 with the same date as this application, and entitled "Breathable laminates based films with filler", the contents of which are fully incorporated here by reference. Other layers of the film will be obvious to a person skilled in this field during the reading presented here are examples.

Pre bonded outer layer is chosen so that it was compatible with tape or glue layer and had properties such as basis weight, objemnocti non-woven cloth, especially twisted nonwoven fabric having a basis weight in the range of from about 10 to about 50 g/m2for example, often in the range of from about 15 to about 25 g/m2. The composition of the outer layer is chosen so that it was compatible with the film layer, providing desirable properties loopy component fasteners. Commonly used synthetic polymers, such as polyolefins, for example polypropylene, polyethylene, mixtures and copolymers comprising propylene and ethylene. Such nonwoven fabrics described above and in this collection of links, and methods of their production are known to specialists in this field. The standard example is the non-woven cloth ACCORDfrom Kimberly-Clark Corp. Dallas, Texas (Kimberly-Clark Corp., Dallas, Texas). The patterns of binding of the outer layer, as noted above, allow you to get a loop between the points of bonding, providing a space for attaching complementary hooks. The examples include a stretched pattern of eraste (RHT), described in the patent for an industrial design USA 239566, the pattern of Easpa (ENR), pattern Delta Dot (Delta Dot), the point of binding which are a series of offset circles, with about 102 rod/inch2and the area swampsnake canvas is the model in the form of "S" weave, described in application for U.S. patent, with the same filing date, serial 08/929808, entitled "non-Woven cloth with embossed binding, having improved strength and abrasion resistance", which is fully incorporated here by reference. In all cases % related area must be less than 30% and the density of binding should be from about 50 to about 200/inch2. In addition, for use as a loopy component fasteners, external layered material preferably should have a tensile strength, measured by the method described above, at least about 3000 g in the direction and at least about 1500 g in the transverse direction, and mainly abrasive wear on rtindale measured, as described above, at least about 3.

When using a separately applied bonding a layer of amorphous polymer must be compatible with both the outer layer and the film and to provide linking between them without affecting the transmission pair. Mainly, the connecting layer is applied using blowing from the melt, for example, amorphous polyolefin, such as REXTAC2730 or 2330 from Huntsman Bldg., Salt lake city, Utah (Hunt than 10 g/m2mostly less than 5 g/m2that is breathable and effective in terms of cost. Other examples include Huls Vestoplast703, 704 and 508 from Huls AG, marl, Germany (Huls AG, Marl, Germany) and Natinal Starch NS 5610 (National Starch NS 5610) from Natinal Starch Chemical company, Bridgewater, new Jersey (National Starch Chemical Company, Bridgewater, New Jersey) and elastomeric compositions described above.

When linking with or without application of a separate bonding layer, the strength of binding between the outer layer and the film is measured by the above test, peeling, and it preferably should exceed the bond strength between the outer layer of hook material and a complementary hooks, measured by the method described above pull-out test hooks, thus, to prevent undesirable delamination. Mainly, the difference is at least about 100, in Addition to many options and especially for linings for personal hygiene, such as diapers, for example, the composite material should have an index of hydrostatic pressure measured by the above method of measuring a hydrostatic pressure of at least about 50 m is disposable personal hygiene items, composite material should have a transmission rate of water vapor of at least about 100 g/m2/24 h and preferably at least about 800 g/m2/24 h For this application, the tensile strength of the hooks preferably greater than about 100 grams, but not more than about 800 g, and the shear strength of the hooks measured by the above test method for shear hooks, preferably greater than about 1000 g, but not more than 6000,

According Fig.2 it shows a cross-section of option loopy component to the fastener of the present invention. Loops 110 between the points of linkage 112 form a curled outer layer 114, which is associated with co-extruded film 116 containing the external connecting layer 118 and the base layer 120 in each pre-connected point coinciding with the point of bonding of laminated material 112. As shown in this drawing, the loop 110 include unrelated threads or fibers are available for attaching hooks 122 complementary material with hooks 124. The hooks and loops for clarity partially separated.

In Fig.3 presents an example of loopy component of the fastener of this invention in the form of a substrate in a disposable diaper. The diaper 210 includes Proclus is her absorption absorbent material 214, while the substrate 216 (shown partially cut to show layers 118 and 120 (Fig.2) for clarity) is impervious to urine and prevents leakage. In this case, the entire substrate obtained from loopy material of the fastener of the present invention, and as described in Fig.2, has a non-woven loop on the outside. It provides essentially unlimited ability to control when you attach the hooks 218. In use, the hooks 218 can be pressed so that the diaper fits close to the body, and can be fastened anywhere on the pads 216. Furthermore, if desired a closer fit to the body, the hooks 218 may simply be shunted out of the train and moved to any location on the substrate 216. In an advantageous variants of implementation, the substrate is permeable to improve comfort and dryness.

In Fig. 4 and 5 show the characteristic patterns prelink used for pre-bonding nonwoven component composite material of the present invention. In Fig. 4 shows the pattern "S-interlacing", described above, have previously associated the area of 400, and Fig. 5 shows the pattern stretched Hansen Pannier composite materials of the present invention, with the pattern prelink "S-weave" (Fig. 7) and the pattern prelink ENR (Fig.6) after testing the gap hooks. As depicted in the photographs, compare the material with a pattern binding ENR, though it also has, as described, good efficiency from the point of view of strength of the hooks has a greater number of fibers, separated from non-woven cloth, in comparison with the composite material of the present invention, pattern bind "S-weave". Both pictures were taken with a magnification of 20 times and the samples were bent outward to demonstrate the torn fibers.

Examples In the following examples, unless otherwise indicated, for receiving loopy material for fasteners using the method described in Fig.1.

Example 1 In this example, the outer layer is a twisted fabric consisting of fibers of 2.0 denier obtained from a copolymer of propylene with 3.5% ethylene Union carbide D (Union Carbide 6D43) from Union Carbid Bldg., Danbury, Connecticut (Union Carbide Corp., Danbury, Connecticut) and having a basis weight of about 0.7 ounces per square yard (about 24 g/m2), this fabric has a pattern binding "stretched Hansen Pennings" ("extended Hansen Pennings") (density casinosonline film, obtained by extrusion blown containing 45 wt.% single-layer LLDPE (DowlexNG A, the density of 0,917 g/cm3index melting at a temperature of 190oWith 3.2 g/10 min, from the Dau Chemical Co., (Dow Chemical Co.,), 50% SupercoatTM, filler, based on covered stearic acid Casos (from the English Rite clay (English China Clay) and 5% LDPE (Dow 6401, 0,922 g/cm3index melting at a temperature of 190oWith 2.0 g/10 min, from the Dau Chemical To. (Dow Chemical Co.), and has the original 1.5 mil.

This film is described in detail in the patent application U.S. serial 773826 dated December 27, 1996, which is fully incorporated here by reference. On the twisted surface of the applied layer obtained by the blowing of the melt associated amorphous polyolefin (Rextac 2715 from Huntsman Bldg., (Huntsman Corp.,)) with a basic weight of about 3.5 g/m2, melting point 177oWith and interval of separation of about 10 cm Before layering stretch film 4 times in the device orientation towards at a temperature of 71oWith that it became microporous. The film is held in the stretched condition until it passes between the smooth rubber (Shore A 40) shaft and a smooth steel shaft for twisting when 15PLI. After the temporarily fix it by 10% (shaft speed for annealing of 30.48 m/min (100 ft/min), the speed of the winding device 27,43 m/min (90 ft/min) and then cooled by a stream of air at a temperature of 15oC. the Obtained laminated material has a basis weight of 49 g/m, the hydrostatic pressure without substrate 220 mbar and a rate of transmission of water vapor (SPIT) 1326 g/m2/24 hours When tested using complementary hooks using krukovii material for zipper Velcro 858 from Velcro Int. (Velcro Int.), tensile strength hooks 402 is g and the shear strength of the hooks is 2919 g, and is the average of 10 tests.

Example 2
In this example, the outer layer is a twisted fabric consisting of fibers of 2.0 denier obtained from a copolymer of propylene with 3.5% ethylene Union carbide D (Union Carbide 6D43) from Union carbide Corp., (Union Carbide Corp.,) and having a basis weight of about 0.65 ounces per square yard (about 20 g/m2), this canvas has the pattern of binding of S-weave" (density of binding 111 studs/inch and the actual measured size of the binding 17,7%) as described in application for U.S. patent, serial 08/929808 from September 15, 1997, entitled "non-Woven cloth with embossed binding, having improved strength and abrasion resistance", fully incorporated here by reference.wow LLDPE (DowlexNG 3310, density 0,918 g/cm3index melting at a temperature of 190oWith 3.5 g/10 min, from the Dau Chemical Co., (Dow Chemical Co.), 48% SupercoatTM, filler, based on covered stearic acid, caso3(from the English Rite clay (English China Clay) and 5% LDPE (Dow 4012, 0,916 g/cm3index melting at a temperature of 190oWith 12.0 g/10 min, from the Dau Chemical Co., (Dow Chemical Co.), and has the original 1.5 mil.

On the twisted surface of the applied layer obtained by the blowing of the melt associated amorphous polyolefin (Rextac 2730 from Huntsman Bldg. , (Huntsman Corp. , with the main weight of about 3.0 g/m2, melting point 177oWith and interval of separation of about 11.5 see Before layering stretch film 4 times in the device orientation towards at a temperature of 71oWith that it became microporous. The film is held in the stretched condition until it passes between the smooth rubber (Shore A 40) shaft and a smooth steel shaft for twisting when 15PLI. After stratifying the tension of the composite material weaken through annealing at a temperature of 110oWith, at the same time pulling it by 10% (shaft speed for annealing 91.44 m/min (300 ft/min), speed metalni layered material has a basis weight of 51 g/m, hydrostatic pressure without substrate 170 mbar and a rate of transmission of water vapor (SPIT) 2429 g/m2/24 hours When tested using complementary hooks using krukovii material for zipper Velcro 51-1003 from Velcro Int., (Velcro Int., ) tensile strength hooks is 174 g and the shear strength of the hooks is 2960 g, and is the average of 10 tests.

Example 3
In this example, the used film is co-extruded from a solution film "AB", where the core layer comprises 45 wt. % single-layer LLDPE (DowlexNG 3310, density 0,918 g/cm3index melting at a temperature of 190oWith 3.5 g/10 min, from the Dau Chemical To. (Dow Chemical Co.)), 50% SupercoatTM, filler, based on covered stearic acid, caso3(from the English Rite clay (English China Clay) and 5% LDPE (Dow 4012, 0,916 g/cm3index melting at a temperature of 190oWith 12.0 g/10 min, from the Dau Chemical To. (Dow Chemical Co. and connecting layer applied on one side, includes 60% SupercoatTMCaso3and 20% amorphous saturated with propene poly alpha olefin, (part APAO see APAO"), (Huls Vestoplastthe density 0,865 g/cm3index melting at tempelement (Dow AffinityEG820 limited geometry, catalyzed, density of 0.87 g/cm3index melting at a temperature of 190oWith 5.0 g/10 min, from the Dau Chemical To. (Dow Chemical Co.). The main layer is 90 wt. % link layer is 10 wt.%.

Stretch film includes a step of preliminary heating to a temperature of 50oWith the stretch in the same area in 3.8 times in the direction at a temperature of 60oC and annealing at a temperature of 93oC. Basic weight together extruded film is 58 g/cm2(1.5 mil). This jointly extruded film is beautifully bound with a speed of 204 ft/min (62 m/min) not requiring a separate application received by the blowing of the melt bonding layer, with an outer layer of example 2, using the pressure 15PLI rubber 40 Shore/smooth pressure roll at a temperature of 93oC. Layered material weakening by 10% (the speed of the pressure roll 62,18 m/min (204 ft/min), the speed of the winding device 54,86 m/min (180 ft/min)). The obtained laminated material has a basis weight of 44 g/m2, the hydrostatic pressure of 60 mbar and SPIT 4239 g/m2/24 hours When tested using complementary hooks, use the awn on the shift of the hooks is 3141 g, and is the average of 10 tests.

For comparison, test samples of normal pads for diapers, representing the layered material-based non-woven fabric/film, using the same hooks as in the above examples. The following results are obtained: outer layered material-based non-woven fabric/film commercial product HuggiesUltratrimTM1996 from Kimberly-Clark Corp. (Kimberly-Clark Corp.) (twisted polypropylene of 2.5 denier bound by the pattern of the wire weave: 320 rod/inch2related area 18%) when tested using Velcro hooks 858 showed an average of 10 tests the tensile strength of the hooks 29 g and the shear strength of the hooks 171, When testing this layered material with Velcro hooks 51-1003, the average for the 10 tests the tensile strength of the hooks is 71 g and the shear strength of the hooks is 589, Through a consumer survey, it was determined that for the high-quality fastening product for active kids required tensile strength hooks, at least 100 g and the shear strength of hooks, at least around 1500

The person skilled in the art will understand that the here presented above description. Means that everything is included modifications, alternatives and equivalents are covered by the claims. For this purpose, equivalents include functional and structural equivalents. For example, a nail and a screw are the functional equivalents of attachment, even if they have different structure.


Claims

1. Breathable impervious to liquid composite material, including pre-associated non-woven fabric having a pattern of binding in the form of separated intervals of points linking with unrelated threads or fibers between the points of bonding, the film is attached to the specified non-woven cloth in places corresponding to the specified points of the link and the rest is almost not associated with this non-woven cloth, where the specified composite material has a transmission rate of water vapor of at least about 100 g/m2/24 h and can withstand a hydrostatic pressure of at least 50 mbar water.

2. Composite material under item 1, in which these points associate with the intervals between them are about 5-30% of the surface indicated previously bound non-woven cloth and the frequency of binding extending t to the specified non-woven cloth using amorphous polymer.

4. Composite material under item 2, in which the said fibers or filaments between the specified points of the link are in the form of loops, forming a region of coupling with a complementary hook component of clasps.

5. Composite material under item 3, which this film has many layers and the amorphous polymer is one of these layers which is in contact with the specified non-woven cloth.

6. Composite material under item 3, wherein said amorphous polymer is a layer, separately applied to the specified film before its connection with the specified non-woven cloth.

7. Composite material under item 4 in the form of loopy component fasteners on the basis of hooks and loops, which has a tensile strength hooks about 100-800,

8. Composite material under item 7, which has a shear strength of hooks about 1000-6000 mm.,

9. Composite material under item 8, in which the point of linking constitute 10-25% of the area specified previously bound non-woven cloth.

10. Composite material under item 9, in which the frequency of binding is about 75-125 per square inch.

11. Composite material according to p. 10, with the rate of abrasive wear on Martinda is a, at least about 800 g/m2/24 h

13. The method of obtaining breathable impervious to liquid composite material, comprising the stage of: obtaining a pre-associated non-woven cloth having a binding site in the form of divided intervals of the points of binding and unbound fibers or filaments between them; obtain breathable film; receiving layer of amorphous polymer between a nonwoven and film and the connection of the specified non-woven cloth, amorphous polymer and film in such conditions, in which the specified non-woven fabric is associated with the specified film essentially only at specified points of the binding.

14. The method according to p. 13, in which the specified film stretch and pull together after binding with the specified non-woven cloth, resulting in loops between these points linking, providing a region for attaching a hook component.

15. Layered material containing film and non-woven fabric, where the aforementioned non-woven fabric is a point related and this film has a high degree of adherence to the specified non-woven cloth at the point of linking that gives a layered material able to withstand hydrostatic 2/24 h

16. Layered material under item 15, in which this film contains an amorphous polymer and is the connecting layer at the contact face side to the front side with the specified pre-associated with a non-woven fabric.

 

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