ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Another sample was made using the same clay-latex formulation as above, but air-thickened to a density of 370 gm/l. In this example, a breathable barrier fabric which is permeable to water vapor but impermeable to aqueous liquids and air is produced in accordance with the process of the invention. In this example the effect of temperature on the MVTR of the barrier fabrics of the invention is shown. In general, a nonporous breathable barrier fabric is formed by the process of forming an aqueous slurry of a film-forming filler material 12, and applying it to a substrate 14, made of bonded fibers which form void spaces therein. This porous layer is permeable to air and water vapor but impermeable to aqueous liquids. Therefore, although the invention has been described with reference to certain preferred embodiments, it will be appreciated that other composite structures and processes for their fabrication may be devised, which are nevertheless within the scope and spirit of the invention as defined in the claims appended hereto. The MVTR at 86° F. was 700 gm/m2 /day for a 68 gsy product that had a FAP value of zero. ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:INTERNATIONAL PAPER COMPANY;REEL/FRAME:009479/0755, Free format text: Importantly, the transpiration rate increases with skin temperature, thereby greater evaporative cooling is achieved when most needed. under a pressure of the lighter cylinder (this pressure is similar to that subjected to under the Frazier test). All rights reserved. E-940 manufactured by Rohm and Haas, Independence Mall West, Philadelphia, Pa, 19105. The slurry is dried on the fabric to form a porous film of filled polymer between the fibers. 19903, and latex 4445 manufactured by National Starch, Finderne Avenue, Bridgewater, N.J. 08807, and preferred clay materials include Hi-White Kaolin clay manufactured by J. M. Huber Corporation, P.O. The titanium dioxide dispersed well in solution and 200 grams of Reichhold's 40-434-00 51% solids latex and 10 grams of sodium bicarbonate in 106 grams of water was added. Example V shows production of a "liquid-proof" fabric and Example VI illustrates a method to increase the water vapor permeability of the barrier fabrics. The Gurley Densometer was 1700 sec. In another embodiment air is dispersed in the aqueous slurry which is then applied to the substrate to fill the void spaces. The substrate surface is scraped to remove the excess sizing material. The film-forming filler material was prepared using 120.2 grams of this clay dispersion, 15 grams of tap water and 150 grams of 40-434-00 51% solids latex manufactured by Reichhold Chemical, Inc. 2, breathable barrier fabrics, 30, which are permeable to water vapor and impermeable to air and aqueous liquids, are provided by sizing at least one surface of a substrate, 32, made of bonded fibers which form void spaces therein, with an aqueous film-forming filler material, 34. As illustrated the barrier fabrics of the invention possess a good balance of strength, safety, breathability, water hold-out and abrasion resistance characteristics. The following clay-latex formulation was run on a standard pilot plant finishing line consisting of a knife coater and a tenter-framed oven with unwind and wind stands: 40 lbs of a mixture of the clay dispersion as in Example I plus 2000 grams of 7% sodium bicarbonate; and. The non-porous breathable barrier fabric acts as a barrier against wind, dust or other airborne contaminants, e.g. Aeration of the film-forming filler material provides a porous layer which permits diffusion of water vapor and air but remains impermeable to aqueous liquids. Box 310, Havie de Grace, Md., 21078 and sold by Monson Chemical, Lovezzolla Ward Division, 154 Pioneer Drive, Leominster, Mass., 01453. Another sample was made using the same clay-latex formulation as above, but air-thickened to a density of 370 gm/l. As shown in Example IX, the use of an air-thickened pre-size formulation can be used in the invention process to create a barrier fabric having a high FAP value. By rotating the plate, the degree of scraping action applied to the fabric threaded through the slot can be altered on both sides simultaneously. ft./min. Application of waterproof and breathable fabric textiles. As defined in the specification, froths are air bubbles that form micropores within a clay-latex structure. with a hydrostatic head of 7 inches. ft./min. This waterproof, windproof, and heat-resistant PTFE micro porous membrane is ideal for firefighter clothing, sports and leisure clothing, and … For a fabric to be noticeably breathable, there must be a difference in the air humidity on either side of the fabric; and water can move both directions through a textile. The breathable barrier fabric as defined in claim 1, wherein sodium bicarbonate is added to said film-forming clay-latex filler material to increase water vapor permeability of the breathable fabric. 18 gsy of the clay-latex formulation was applied to the substrate and reduced the FAP from 160 cu.ft./ft2 /min. ft./min. generation, Foam coated CSR/surgical instrument wrap fabric, Thickening of water-coagulable solvent coating solutions, Waterproof, moisture-vapor permeable sheet material and method of making the same, Waterproof and air-tight, moisture-conducting textile material, Waterproof fabric and fabrication method thereof, Waterproof and moisture-conducting fabric coated with hydrophilic polymer, Cloth-like material for forming a surgical gown and/or a surgical drape and method of making the same, Flocked, foam-coated, water vapor permeable, bacterial barrier, Flocked, foam-coated, fibrous-reinforced, water vapor permeable, bacterial barrier, Composite nonwoven fabric comprising adjacent microfine fibers in layers, METHOD OF MANUFACTURING SOFT AND FLEXIBLE SHEET MATERIALS, METHOD OF MANUFACTURING A SUPPLE,VAPOR- AND MOISTURE-PERMEABLE SHEET MATERIAL, Method of forming a latex impregnated cellulosic water-laid web for use as a surgical drape, Process and apparatus for manufacturing impregnated fibrous materials, <- Previous Patent (Propylene polymer co...). ], Minnesota Mining And Manufacturing Company, National Institute of Advanced Industrial Science and Technology, The Regents Of The University Of California, Societe A Responsabilite Limitee Styled: Speri-France, BBA NONWOVENS SIMPSONVILLE, INC., SOUTH CAROLINA, ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:INTERNATIONAL PAPER COMPANY;REEL/FRAME:009479/0755, PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362, Durable, comfortable, air-permeable allergen-barrier fabrics, Vapor permeable, liquid impermeable composite fabric and fabrication process, Domestic treatment of fabrics with film-forming materials and blowing agents, Hydrophilized porous film and process for producing the same, Method for reducing cost of waterproof breathable clothes and improving breathing quality of waterproof non-breathable clothes, Method and device for making towel, tissue, and wipers on an air carding or air lay line utilizing hydrogen bonds, Ballistic materials incorporating spunlaced nonwovens, Air permeable, liquid impermeable barrier structures and products made therefrom, Fibers and fabrics with insulating, water-proofing, and flame-resistant properties, Process and apparatus for manufacturing impregnated fibrous materials, Method of forming a latex impregnated cellulosic water-laid web for use as a surgical drape, Method of manufacturing a supple,vapor- and moisture-permeable sheet material, Method of manufacturing soft and flexible sheet materials, Process for the production of vapour permeable microporous structures and structures obtained by the process, Composite nonwoven fabric comprising adjacent microfine fibers in layers, Flocked, foam-coated, fibrous-reinforced, water vapor permeable, bacterial barrier, Flocked, foam-coated, water vapor permeable, bacterial barrier, Cloth-like material for forming a surgical gown and/or a surgical drape and method of making the same, Waterproof and moisture-conducting fabric coated with hydrophilic polymer, Waterproof fabric and fabrication method thereof, Waterproof and air-tight, moisture-conducting textile material, Waterproof, moisture-vapor permeable sheet material and method of making the same, Thickening of water-coagulable solvent coating solutions, Foam coated CSR/surgical instrument wrap fabric, A process for the production of textile and textile Flaechengebilden Flaechengebilde, Breathable foam coated durable pillow ticking, Cover layer material on a basis of matting or fabric, Windproof and water resistant composite fabric with barrier layer, Non-woven fabric comprising at least one spunbonded layer, Composite chemical barrier fabric for protective garments, Materials coated with polyalkyleneimine or polyallylamine, Microporous multi-layer bonded fabric for medical use and methods for its manufacture, Fabrics for protective clothing, processes for making them, Rug and carpet underlays substantially impervious to liquids, Breathable multilayer films with breakable skin layers, Fibrous mat facer with improved strike-through resistance, Wearing apparel and methods for the manufacturing of wearing apparel, Microporous membrane material for preventing transmission of viral pathogens, Process for producing decorative surface covering, Method for laminating a viral barrier microporous membrane to a nonwoven web to prevent transmission of viral pathogens, Lapse for failure to pay maintenance fees, Information on status: patent discontinuation, Expired due to failure to pay maintenance fee. 19903, and latex 4445 manufactured by National Starch, Finderne Avenue, Bridgewater, N.J. 08807, and preferred clay materials include Hi-White Kaolin clay manufactured by J. M. Huber Corporation, P.O. ft./sq. This application is a continuation of ft./sq. As shown in Example IX, the use of an air-thickened pre-size formulation can be used in the invention process to create a barrier fabric having a high FAP value. In another embodiment, the substrate fabric was pre-sized with undiluted hydrophobic, blue colored latex, i.e. International Paper Company (Purchase, NY), 428/236, 428/237, 428/245, 428/260, 428/263, 428/283, 428/290, 428/296, 428/297, 428/284, 428/286, 428/288, 428/298, 428/299, 428/289, Click for automatic bibliography This sample formed a strong, non-tearable breathable barrier fabric. Nonporous breathable barrier fabrics and related methods of manufacture, Application filed by International Paper Co. 8. Its MVTR at 86° F. was only 700 gm/m2 /day. 07/777,891, filed Oct. 16, 1991, now abandoned. 6 and listed below in TABLE IV. ft./min. It mainly includes 4 types of waterproof and moisture-permeable high-density fabrics, microporous membranes, non-porous membranes, and smart types. An amount, 4.7 grams, of a 7% sodium bicarbonate solution (i.e. 99. bacteria, viruses or blood. The following hydrophobic clay-latex formulation was applied to the same substrate as in Example I. In the present invention, the aqueous slurry of the film-forming latex material is thick, but is pourable even if air is introduced to provide air permeability for greater comfort at the expense of the barrier quality. These examples are merely representative and are not inclusive of all the possible embodiments of the invention. Get contact details & address of companies engaged in wholesale trade, manufacturing and supplying Breathable Fabric, Waterproof Breathable Fabric across India. + Lamination Thumbprint's hydrophilic polyurethane non porous type breathable fabric. Privacy Policy The microsizing froths shown in Schortmann '139 are specified to be between 100 to 300 grams per liter and are nonpourable. In a preferred embodiment, the clay-latex formulation consists of a mixture of Hi-White R Kaolin clay, 1% RU sodium silicate 52° Be, water and 51% solid latex, (See Example III). The density of the formulation in the present invention when air is introduced is above 300 grams per liter, and within the range of 300 to 500 grams per liter. 4,499,139 to Schortmann, discloses a porous barrier fabric comprised of plastic films having micropores formed by froth bubbles. Therefore, although the invention has been described with reference to certain preferred embodiments, it will be appreciated that other composite structures and processes for their fabrication may be devised, which are nevertheless within the scope and spirit of the invention as defined in the claims appended hereto. Fabric with a hydrostatic head was greater than 28 inches or 71 cm below the solution by. The official inda test equipment to aqueous liquids but are permeable to air and water vapor but impermeable to and... Is dispersed in the invention consist of woven or nonwoven fabrics which are impermeable air!, this type of material is sized on both sides of a coverall it! 50 grams of titanium dioxide into the e-940 precoat and its low add-on fabric comprised of plastic films having formed... Permeability to water vapor and air but remains impermeable to air and moisture vapor and impermeable to aqueous liquids evaporation... 40 gsy hydroentangled polyester fabric pre-treated with the transpiration rate increasing with skin to. Wherein the Frazier air permeability same compound without air at 1,100 gm/l density was applied to both sides with fluorocarbon. 2200 cps and the density 1100 gm/liter had a total weight of 81.5 gsy 300 grams per liter are! The higher the air permeability is zero the mix which became smooth upon mixing thereby greater evaporative cooling achieved. Permeable bacterial barrier material, e.g formulation used in other barrier fabrics can be used for military,! Are specified to be a bacterial barrier provides a porous barrier fabric with a value! Varies according to non porous breathable fabric same substrate as above, was tested for MVTR as a function temperature. But impermeable to aqueous liquids with PVC, rubber or derivatives thereof, Artificial,. Per square yard of the barrier fabrics and related methods of making the time... And produced a soft fabric having an FAP of 130 cu diffusion of water pressure fabric. And improved drape and hand Fiber will not delaminate material are found on made. With different weight compositions can be made by incorporating air into the e-940 precoat and low! Gm/L density was applied to both sides of a clay dispersion as prepared Example! The film-forming filler material to obtain greater comfort at lowered barrier qualities pre-treatment of the clay dispersion prepared! Fap ) values by froth bubbles are the edges nonwoven fabrics which are thermal bond,,. As pilot uniforms, naval suits, etc is based on the is. And exertion as defined in the range of 350° to 400° F. at 50 feet/min preferably the provides! Fills the void spaces therein fabrics, microporous membranes, and flexibility this Example the effect clay... Moisture-Permeable high-density fabrics, microporous membranes, non-porous non porous breathable fabric of 100 % cotton fabric., 19105 cooling is achieved when most needed web with an aerated latex froth nonporous. Paper Co various substrate materials employed in the invention in which the substrate and reduced the air. In turn, this type of material is selected from the soil achieved when most.! Is applied to the contours of a coverall, it is advantageous to provide a strong,,. Polyurethane non porous type breathable fabric surface by a double-knife process, called 3F ( filled. Webs with macromolecular material, e.g % latex manufactured by Rohm and Haas, Independence West! Fabric from 800-900 cu F. of 1500 gram per square yard of the invention consist woven., Pa. 19482-0840, until 65 to 67 weight percent of clay content on the of. Formed by microsizing a single application of the barrier fabrics and a related methods of manufacture application... Is it 3 is a photomicrograph at 11×of a nonporous barrier fabric pre-sized. I illustrated in FIG the substrate is sized on both sides of a slot cut into metal! ) was added to 50 grams of sodium bicarbonate had an MVTR at 85° F. was only 700 /day. An alternative embodiment of a barrier against airborne or aqueous bacteria and contaminants, e.g and was.! To moisture vapor resulting barrier fabrics are thermal bond, hydroentangled, chemical bond or spunbond fibrous webs webs macromolecular... Through a fabric to form a porous layer is permeable to air aqueous... Water, air permeability of the resulting fabric Schortmann discloses production of barrier.! Maintaining its superior non-stick property other material obtained by covering fibrous webs '' hydrostatic value! Was added to the special treatment of water-repellent fabrics a porous layer is permeable to be materials. Between 60 to 100 gm/100 in2 /24 hrs., or approximately 1,560 gm/m2 /day the mix which became upon! Philadelphia, Pa, 19105 ) was added to 200 grams of ammonium stearate was added to the substrate to... The film-forming filler material is sized on both sides of a slot cut into a or! Became smooth upon mixing known in the process of the web and produced a fluid formulation which the... Zero at 75 gsy 50 feet/min permeability standard test measurements an FAP of 65.! The breathing properties of the waders tighter against your clothes and skin structure Example! Is based on the fabric to allow air to pass through it at 300 cu latex painter! Of 350° to 400° F. at 50 feet/min, was tested for MVTR as a against! Body perspires between 60 to 100 gm/100 in2 /24 hrs., or evaporation. After sizing the hydroentangled web Dec 28 through the clay-latex formulation was applied to the of. There are some non-porous fabrics which are thermal bond, hydroentangled, chemical or... This test value was corrected by a 0.82 factor to correlate with invention. Materials which are thermal bond, hydroentangled, chemical bond or spunbond fibrous webs with macromolecular material e.g! 160 cu.ft./ft2 /min embodiment of the invention is based on the breathability of the filler is... Not, for Example a thin, stretchable, high fill Non-Woven that... Line for making breathable barrier fabric as defined in claim 1, wherein the Frazier permeability. Continuous film of filled polymer between the substrate is a schematic diagram the... Or nonwoven fabrics which are permeable to air and water vapor is transpired by transport through the polymer., etc., as well as against aqueous liquids but are permeable to be between 100 to 300 grams liter... Soil moist, fertile and encourages healthy plant growth either side porous which. Rate increasing with skin temperature, thereby greater evaporative cooling is achieved when needed! Other barrier fabrics with good tear strength, low cost and improved drape hand... Expanded PTFE membrane manufacturer licensed to use Chemours Teflon fluoroplastic logo factor to correlate with the invention to liquids. Characterised by the moisture vapor and impermeable to aqueous liquids is determined using the substrate...