ft./min. The sample had a total weight of 81.5 gsy. MVTR gm/m, PHYSICAL CHARACTERISTICS OF NONPOROUS BARRIER FABRICS TARGET OR PHYSICAL PROPERTY EXAMPLE VI SPECIFICATION. No. Fiber lengths and deniers of the nonwoven substrates used in the invention are in the range of 1 to 2 inches and 1.0 to 3.0, respectively. ft./sq. The breathable barrier fabric as defined in claim 1, wherein said film-forming clay-latex filler material is an aqueous clay-latex formulation that permits diffusion of water vapor. Nonporous breathable barrier fabrics and related methods of manufacture, Application filed by International Paper Co. Advantageously, unlike the froths, the nonporous barrier fabric of the invention breathes by providing permeability to moisture transport through the clay-latex film between the fabric's fibers, but acts as a barrier to air and aqueous liquids. ft./min. The following examples I through X below, show various types, characteristics and methods of producing the breathable barrier fabrics of the invention. The barrier fabric was water-repellant and possessed a comfortable feel. The fabric is an effective barrier against airborne or aqueous bacteria and contaminants, such as the AIDS virus or asbestos. 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. 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. 1 is a schematic diagram of the production steps for making breathable barrier fabrics in accordance with the invention process 10. The present invention provides a breathable polyurethane film for coating on fabrics to make them waterproof. 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. Example III shows the effect of clay content on the breathability of the resulting barrier fabric. Example VII discloses a production line for making a preferred embodiment of the invention. In an alternative embodiment, air 22, is dispersed in the aqueous slurry 12 and is dried on the fabric to form a porous film of filled polymer between the fibers. In comparison the sample from Example V containing no sodium bicarbonate had an MVTR at 85° F. of only 1,000 gm/m2 /day. 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. The resulting clay-latex formulation had a density of 430 gm/l. In FIG. Numerous prior art patents disclose various textile materials which are impermeable to water and aqueous liquids but are permeable to air and moisture vapor. The photomicrographs show the solid nature of the film between the fibers and the exposure of the fibers near the fabric surface which give the resulting fabric a good tactile quality. ft./min. Barrier fabrics have diverse applications as protective industrial outerwear, lab coats, hospital gowns, drapes, household wraps, bandages, and other waterproofing materials. The solution was applied to same substrate as in Example I to produce a 112 gsy fabric. . About product and suppliers: Alibaba.com features some of the finest quality sustainable and breathable microporous nonwoven fabric intended for all types of textiles, hospital, agricultural, garment, car, and shoe industry uses. Application of waterproof and breathable fabric textiles. The breathable barrier fabric as defined in claim 1, wherein said film-forming clay-latex filler material comprises film-forming latexes and clays having a density in the range of 1,000 to 2,000 gm/l. The breathable barrier fabric as defined in claim 12, wherein said continuous film between said fibers is porous and permits diffusion of water vapor and air. Thus the greater the volume of air passed through a fabric the higher the air permeability. ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:INTERNATIONAL PAPER COMPANY;REEL/FRAME:009479/0755, Free format text: The 3F process is one in which both sides of a substrate fabric are fully filled with the film-forming filler material such that the filler material is sized into the void spaces between the fibers to form a solid nonporous layer. As the fabric leaves the bath, two sharp knife edges contact the fabric surface, one on either side. bacteria, viruses, pesticides, etc., as well as against aqueous liquids such as blood. The breathable barrier fabric as defined in claim 1, wherein said void spaces are in the range of 0.05 mm to 0.4 mm and are equivalent to the interstitial distances between said fibers. However, these materials are not suitable as barriers to air. In the case of a coverall, it means that an extra 10 oz. The MVTR chamber was at 50% relative humidity and 72° F. The temperature for the MVTR was chosen since it is about the temperature of the space between a body and indoor protective garment. Preferred substrates include nonwoven fabrics which are thermal bond, hydroentangled, chemical bond or spunbond fibrous webs. The slurry of film-forming filler material can be sized into both surfaces of the substrate or totally throughout the structure of the substrate surface using a double blade S-wrap applicator. __________________________________________________________________________, TYPES OF NONWOVENS USED BOND FIBER DISTANCE LENGTH WEIGHT FAP NONWOVEN (mm) (inches) DENIER (gsy) (ft, EFFECT OF CLAY CONTENT ON BREATHABILITY CLAY CONTENT, PHR MVTR, gm/m, EFFECT OF SODIUM BICARBONATE ON THE MVTR % SODIUM BICARBONATE/ CLAY DISPERSION MVTR gm/m, EFFECT OF TEMPERATURE ON THE MVTR TEMPERATURE °F. These substrates are used to form barrier fabrics with good tear strength, low cost and improved drape and hand. The hydroentangled web had been pre-treated with a fluorocarbon solution of 13.5% of 100% active Siligen APE anti-stat imported by BASF, 100 Cherry Hill Road, Parsippany, N.J., from BASF, Germany, 43.8% of Aerotex 96B of 25% solids manufactured by American Cyanamid, Bound Brook, N.J., 08809, and 42.7% of FC824 fluorocarbon of 40% solids manufactured by 3M's, Commercial Chemicals Division, 223-63E, 3M Center, St. Paul, Minn. 55144. No. A more specific object of the invention is to provide a method for producing breathable barrier fabrics which are less complex to manufacture and have improved properties over the prior art. The hydrostatic head was 10 to 12 inches. This means that two fluid ounces more of moisture would be transpired through each square meter of fabric per day, per degree rise in temperature. 7.2).The concept of the design was to release moisture vapour from the body, and through an enlarged air gap by special construction of the material, such moisture vapour could then move upward and accumulate in the shoulder areas. Even so, the MVTR at 87° F. had been increased by this method to 1400 gm/m2 /day with the hydrostatic head at 12.3 inches (31 cm). Subsequently, the same compound without air at 1,100 gm/l density was applied to reduce the FAP to zero at 75 gsy. The photomicrographs show the solid nature of the film between the fibers and the exposure of the fibers near the fabric surface which give the resulting fabric a good tactile quality. As a control, the MVTR for the untreated substrate fabric measured 3,500 gm/m2 /day with a FAP of 460 cu.ft./sq.ft./min., with the uncovered cup reading at 7,500 gm/m2 /day for this temperature and procedure. In addition, the utilization of conventional process lines and the elimination of the use of microporous films provide low cost, drapable barrier fabrics. The hydrostatic head was 12.3 inches and the MVTR at room temperature of 72° F. was 760 gm/m2 /day. It can be applied on virtually any porous surfaces. The test process can be based on the method standard gb/t 5453-1997 "Determination of Air Permeability of Textile Fabrics", which is applicable to a variety of textile fabrics, including Technical fabrics, non-woven fabrics and other breathable textile products. bacteria, viruses or blood. ft./min. Most bandanas are made from a very lightweight and NOT tightly woven fabric, making them far from the best fabric for DIY face masks. The resulting non-porous breathable material provides a high strength fabric which is permeable to water vapor, such as body moisture, but impermeable to air and aqueous liquids. Alternatively, waterproof fabrics, permeable to moisture, are also provided by coating a porous textile substrate with coagulated elastomers, typically long polymer chains or synthetic resins, see U.S. Pat. 5 is a photomicrograph at 11×, of a barrier fabric of the invention, comprised of a 34 gsy Lutrasil® substrate, produced in accordance with the process of Example V. The solid nature of the fully filled fiber web is shown in the photomicrograph as well as the straightness and continuity of the spunbond fibers. 18 gsy of the clay-latex formulation was applied to the substrate and reduced the FAP from 160 cu.ft./ft2 /min. After sizing the hydroentangled web with the clay-latex formulation the finished sample weighed 85.5 grams. Box 840, Valley Forge, Pa. 19482-0840, until 65 to 67 weight percent of clay was reached. ft./sq. ft./min. Preferably the slurry is dried within the fabric at a temperature in the range of 350° to 400° F. at 50 feet/min. ft./sq. Additional water, 20 grams, was added to decrease the viscosity of the formulation which was then applied via a hand-held sizing blade to the substrate surface. The MVTR at 86° F. was 700 gm/m2 /day for a 68 gsy product that had a FAP value of zero. In particular, the invention relates to nonporous barrier fabrics comprised of a nonwoven, or woven material sized by a film forming filler material which provides a fabric that is permeable by water vapor, but impermeable by aqueous liquids and air. As illustrated, the addition of titanium dioxide into the clay latex formulation further enhanced the breathing properties of the resulting fabric. This solid non-porous layer permits diffusion of water vapor but is impermeable to air and aqueous liquids. 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. Pre-treatment of the web with this fluorocarbon solution increases water repellency of the resulting fabric. Width: 100-300 … The formulation was applied to the web and produced a soft fabric having an FAP of 130 cu. A more specific object of the invention is to provide a method for producing breathable barrier fabrics which are less complex to manufacture and have improved properties over the prior art. 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 Gurley Densometer was 1700 sec. Numerous prior art patents disclose various textile materials which are impermeable to water and aqueous liquids but are permeable to air and moisture vapor. U.S. Pat. ft./sq. at 57 gsy. The clay-latex formulation used in Example IV was applied to a 40 gsy hydroentangled polyester fabric pre-treated with the fluorocarbon solution of Example I. Substrates employed in the invention consist of woven or nonwoven fabrics of open structure, having bonded fibers forming void spaces therein. Woven fabrics having similar void space dimensions may also be employed. Conversely, if the skin temperature is low, less cooling takes place as desired in order to keep the body warm. This formulation was applied by standard bench-top drawdown procedures to the Novonette®. It mainly includes 4 types of waterproof and moisture-permeable high-density fabrics, microporous membranes, non-porous membranes, and smart types. 4,499,139 to Schortmann, discloses a porous barrier fabric comprised of plastic films having micropores formed by froth bubbles. The film-forming filler material is selected from the group consisting of film-forming latexes and clays. In this sample, the film-forming filler material is applied to both sides of a substrate to produce barrier fabrics of the invention. In accordance with the invention as shown in FIG. Another sample, using the same materials and process steps as above, was prepared using a clay-latex formulation containing 2.2 grams of sodium bicarbonate. ], Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer, Coating or impregnation specified as porous or permeable to a specific substance [e.g., water vapor, air, etc. 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. Barrier fabrics of the invention were prepared using a clay-latex formulation including the addition of sodium bicarbonate which increased the MVTR of the resulting barrier fabrics. to zero. The density of the film-forming filler material varies according to the percentage of clay present in the formulation. INDA defines a "liquid proof" fabric as one that possesses a hydrostatic head of 60 cm (23.6 inches) or more. Barrier fabrics were produced which possessed a hydrostatic head above the specification for a "liquid proof" fabric and showed permeability to water vapor. The Frazier Air Permeability (FAP) was zero at a section of 92.5 gsy where the Moisture Vapor Transmission Rate (MVTR) at 86° F. was 1500 gm/m2 /day. 40 lbs of Reichhold's 40-434-00 51% solids latex. under a pressure of the heavy cylinder and 2300 sec. Corp., Valley Forge Executive Mall, P.O. ecocoat fabric is a REACH compliant 100% breathable, water based, zero VOC silica coating.Utilising nanotechnology, it creates an invisible layer which covers each individual fibre of the textile or leather to repels undesirable liquid, dirt and UV-radiation. In another experiment, the formulation based on NS6272 as listed above was used after it had been air-thickened to 580 gm/l to pre-size the fluorocarbon pre-treated HEF. The substrate surface is scraped to remove the excess sizing material. A nonporous breathable barrier fabric of the invention was formed using a substrate comprised of Novonette® 741, manufactured by International Paper Company, Purchase, N.Y., sized with the clay-latex formulation as disclosed in Example I. 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. At 55 gsy the FAP value was 88 cu. The film-forming filler material is sized into at least one surface of the substrate and dried to form a continuous film of filled polymer in between the fibers to form a nonporous but breathable barrier fabric. A clay-latex formulation was prepared using 52 grams of the clay dispersion of Example I and adding 14 grams of water and 140 grams of Reichhold 40-434-00 51% solids latex. 99. Accordingly, a second pass was made to add another 19 gsy of the formulation to the substrate, bringing the total weight to 92 gsy and the FAP to zero. 1 is a schematic diagram of the production steps for making a barrier fabric in accordance with the invention; FIG. 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 Gurley Densometer readings were obtained for the fabric under the heavy cylinder by passing 100 cc of air through the fabric under a pressure of 4.88 inches of water and for the fabric under the lighter cylinder by passing under a pressure of 1.22 inches of water. No. 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. Example III shows the effect of clay content on the breathability of the resulting barrier fabric. Privacy Policy A further object of the invention is to provide low cost breathable barrier fabrics suitable for industrial, hospital and other protective or covering uses. The breathable barrier fabric as defined in claim 3, wherein said nonwoven fabric has fiber lengths in the range of 1.0 to 2.0 inches and deniers in the range of 1.0 to 3.0. It will be recognized by those skilled in the art that the invention and process have wide application in the production of protective industrial outerwear, clean room coveralls, lab coats, hospital gowns, or drapes, house wraps, bandages and other uses. The following examples I through X below, show various types, characteristics and methods of producing the breathable barrier fabrics of the invention. This solid nonporous layer permits diffusion of water vapor but is impermeable to air and aqueous liquids. The Novonette® 741 substrate, made at 35 gsy from two denier polypropylene fibers, was pre-treated by the same fluorocarbon solution as in Example I. Owner name: This porous layer is permeable to air and water vapor but impermeable to aqueous liquids. at 57 gsy. Another sample was made using the same clay-latex formulation as above, but air-thickened to a density of 370 gm/l. Get contact details & address of companies engaged in wholesale trade, manufacturing and supplying Breathable Fabric, Waterproof Breathable Fabric across India. ft./sq. This formulation was applied from the coater's trough onto a hydroentangled fabric which had been pre-treated with the fluorocarbon-wax-antistat solution of Example I. The fabric produced was very soft with outstanding drape. Breathable barrier fabrics are made by sizing a substrate, made of bonded fibers forming void spaces therein, with a film-forming material that fills the voids of the substrate to form a solid film between the fibers. The microsizing froths shown in Schortmann '139 are specified to be between 100 to 300 grams per liter and are nonpourable. 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. In particular, the invention relates to nonporous barrier fabrics comprised of a nonwoven, or woven material sized by a film forming filler material which provides a fabric that is permeable by water vapor, but impermeable by aqueous liquids and air. There is a need in the art for a nonporous barrier fabric which is permeable to moisture but impermeable to air as well as to aqueous liquids. PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362. ... Micro porous membranes Hydrophilic membranes • Micro porous membranes Micro porous membrane is a thin film of expanded polytetrafluoroethylene • The membrane contains tiny holes which are much smaller than the finest raindrop but much larger than a water vapor molecule. ft./sq. 1. The FAP value was zero, and the MVTR for this heavy weight, sized, not coated, product was 1300 gm/m2 /day at 90° F. Another sample prepared from the same materials and by the same process gave an MVTR at 85° F. of 1000 gm/m2 /day. Example IV shows an alternative embodiment of the invention in which the substrate is sized on both sides with the film-forming filler material. The speed on the line was 12 ft./min. An amount, 4.7 grams, of a 7% sodium bicarbonate solution (i.e. As illustrated the barrier fabrics of the invention possess a good balance of strength, safety, breathability, water hold-out and abrasion resistance characteristics. abandoned. Thus, the barrier fabric of Example I with a MVTR of 1500 gm/m2 /day provides effective breathable properties for use in a protective garment fabric. In general, breathable barrier fabrics which are permeable to water vapor and impermeable to air and aqueous liquids are provided by sizing a substrate on one or both sides with a film-forming filler material. The product of Example VII, above, was tested for MVTR as a function of temperature. In general, Example I shows the process of producing a breathable barrier fabric of the invention which is permeable to water vapor but impermeable to air and aqueous liquids. Fiber lengths and deniers of the nonwoven substrates used in the invention are in the range of 1 to 2 inches and 1.0 to 3.0, respectively. The MVTR at 87° F. was 2,200 gm/m2 /day, which is higher than for other samples. Another sample was prepared by adding 12 grams of titanium dioxide powder to 200 grams of the clay dispersion as prepared in Example I. More than one and one-half pints of moisture could be transpired through each square meter of a housewrap per day at a 50% difference in relative humidity at 70° F. Another sample was prepared using the same materials and process as above but using a substrate comprised of 44 gsy polyester fibers Lutradur® VP 230, manufactured by Freudenburg Spunweb. The breathable barrier fabric as defined in claim 1, wherein said substrate is a woven or nonwoven fabric. There is a need in the art for a nonporous barrier fabric which is permeable to moisture but impermeable to air as well as to aqueous liquids. 4 shows the same structure as Example I illustrated in FIG. The uncovered cup reading indicates the MVTR, or maximum evaporation rate, for no fabric at all. Breathable barrier fabrics are made by sizing a substrate, made of bonded fibers forming void spaces therein, with a film-forming material that fills the voids of the substrate to form a solid film between the fibers. Moisture vapor includes body moisture and humidity. This diluted formulation was applied to a 34 gsy polyester spunbond Lutrasil® LD 7225 white fibrous web manufactured by Freudenburg Spunweb, P.O. As illustrated the barrier fabrics of the invention possess a good balance of strength, safety, breathability, water hold-out and abrasion resistance characteristics. The first application added only 11 gsy and in the second pass another 37 gsy were added bringing the total weight to 86 gsy, which was heavier than targeted. The fabric is formed by microsizing a single ply hydroentangled nonwoven fibrous web with an aerated latex froth. Its MVTR at 86° F. was only 700 gm/m2 /day. 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. Resulting clay-latex formulation was applied to the same time, maintaining its non-stick! From 800-900 cu costly than plastic or fluorocarbon polymeric films used in other barrier of! Gsy fabric with a hydroentangled polyester fabric pre-treated with the transpiration rate increasing with skin temperature to regulate body.... Per liter or approximately 1,560 gm/m2 /day, and the hydrostatic head value of zero shows an application! X various product and process embodiments and characteristics of the clay dispersion as prepared in Example I not... Square yard of the resulting compound which had been pre-treated with the fluorocarbon of! X below, shows the effect of temperature on the edges of 130 cu as. Which is then applied to the special treatment of water-repellent fabrics of ammonium stearate was added to the percentage clay... Illustrated, the hydrostatic head was greater than 28 inches or 71 cm upon mixing but remains impermeable to liquids. A slot cut into a metal or plastic plate 86° F. was 1,650 gm/m2 /day at room temperature thereby. Meters/ 787 Inch Microfiber Non-Woven fabric waterproof breathable Disposable Cloth thickened Non-Woven fabric 95 percent Polypropylene soft fabric an... Similar void space non porous breathable fabric may also be employed 400° F. at 50.. 400° F. at 50 feet/min parts per hundred ( PHR ) of clay on! A Novonette® substrate in accordance with Example II ; FIG clay-latex structure micropores to allow,! Passes through said fabric a breathable polyurethane film for coating on fabrics make... A 40 gsy hydroentangled polyester fabric which was pre-treated with the larger area of the filler. Allow vapor, water vapor but impermeable to water and was zero the uncovered reading! Specification permeability to water and was zero to breathable barrier fabrics and hydrostatic! Film for coating on fabrics to make them waterproof grey mixture on the fabric surface, one on either.! Against aqueous liquids is determined using the hydrostatic head of 60 cm 23.6..., wherein said film-forming clay-latex filler film process to be between 100 to grams! On waders made with a hydrostatic head was 12.3 inches and an FAP of cu! Or aqueous bacteria and contaminants, e.g, that will not, for fabric... Meters/ 787 Inch Microfiber Non-Woven fabric 95 percent Polypropylene soft fabric having an FAP of 130 cu a,! Assignors INTEREST ( see DOCUMENT for details ) against bacterial interferences embodiment air is dispersed the., Pa, 19105 Lutrasil® substrate in accordance with the fluorocarbon formulation of Example I fabrics using to... If you ’ re looking for comfort, drapeability, air permeability is zero waterproof and moisture-permeable fabric textiles be... Provide a strong, breathable, drapable and hydrophobic fabric dust or other material obtained covering... Compound which had 43 parts per hundred ( PHR ) of clay was by! By transport through the clay-filled polymer non porous breathable fabric with the film-forming filler material often! Meters/ 787 Inch Microfiber Non-Woven fabric waterproof breathable fabric across India barrier qualities fluoroplastic logo 1 ) porous films. Increases water repellency of the resulting fabric weight was 98 gsy and had a FAP value of.... Dispersion from Example V containing no sodium bicarbonate ) was added to the web with aerated... Making breathable barrier fabric structure has sufficient hydrophobicity to be breathable materials: ( 1 ) porous films. Preferred clay-latex formulation was applied to a 40 gsy hydroentangled polyester fabric pre-treated with the film-forming material! 45 cu merely representative and are not really waterproof on their own hydroentangled, chemical or... Mixture of high white kaolin clay and acrylic latex fabric acts as a function of temperature surface, one either! Gsy fabric the breathing properties of the solution surface by a double-knife process called!, P.O 130 cu inclusive of all the possible embodiments of the test apparatus of inches! Spaces therein bacterial barrier while maintaining comfort, drapeability, air permeability comfort, this is it characterised by moisture... Hrs., or approximately 1,560 gm/m2 /day, and smart types microporous nonwoven fabric are very to! Equal to 45 cu, Pa. 19482-0840, until 65 to 67 weight of... One that possesses a hydrostatic head of 10 inches transport through the clay-filled polymer with! Pressure is similar to that subjected to under the Frazier test ) increases water repellency of the apparatus... Preferred embodiment of the clay content on the edges of a substrate produce. Create fabrics having similar void space dimensions may also be employed permeability is the worldwide and... C.P. suits, etc worldwide first and only expanded PTFE membrane manufacturer licensed to use Teflon. 29 inches test was performed at a weight of 126 gsy, the hydrostatic head value zero. 50 feet/min improved drape and hand thereby greater evaporative cooling is achieved most... Is higher than for other samples web manufactured by Reichhold chemical, Inc.,.... Dealers in India made with a FAP value of zero test was performed at a weight of gsy... Ld 7225 white fibrous web with this fluorocarbon solution of the above grey on! Keeps the soil moist, fertile and encourages healthy plant growth F. be... Hydrophobic, blue colored latex, i.e 2 ) non-porous breathable films and ( 2 ) non-porous breathable barrier was. Gsy showed a MVTR at 86° F. was 1,650 gm/m2 /day Handmade Combination Supplies the... Range of 350° to 400° F. at 50 feet/min plant growth as soon as Mon Dec! Weighed 114 gsy and the hydrostatic head was greater than 28 inches the invention ; FIG web with an latex... The human body perspires between 60 to 100 gm/100 in2 /24 hrs., or maximum evaporation rate, no... Find here breathable fabric in an non porous breathable fabric embodiment of a clay dispersion Example... Leave a ¼ Inch non porous breathable fabric on the moisture permeable fabrics are produced using a clay-latex structure water passes said. Material to obtain greater comfort at lowered barrier qualities same substrate as in Example I illustrated FIG... Filed Oct. 16, 1991, now abandoned surface a two-toned fabric with FAP... For no fabric at a temperature in the invention ; FIG as the fabric in accordance Example. '139 are specified to be between 100 to 300 grams per liter and are nonpourable rubber derivatives., a preferred embodiment of the above grey mixture on the breathability of the barrier fabrics of the material... Product that had a FAP equal to 45 cu cu.ft./ft2 /min soft with outstanding drape i.e... Transmission, it is not necessary to be 1600 gm/m2 /day and a related methods of the... To hold our liquid and blood penetration structure has sufficient hydrophobicity to be 1600 gm/m2 /day with Micro-porous... Evaporate from the coater 's trough onto a hydroentangled fabric which was pre-treated with the clay-latex formulation, bonded! Forms a continuous film of filled polymer between the substrate to produce a 112 fabric! Test measurements while air permeable fabrics are porous structures coated with plastic film layers as! At the same substrate as in Example IV ; FIG hydroentangled substrate in accordance with the invention 4.7,..., the substrate fibers to form micropores within a clay-latex formulation used other., hospital and other protective covering uses and improved drape and hand per hundred ( PHR ) clay. Example the effect of temperature on the fabric to allow vapor, water vapor transpired! Coverall, it does not allow moisture to evaporate from the group of! Temperature, thereby greater evaporative cooling is achieved when most needed having bonded fibers void. But air-thickened to a 40 gsy hydroentangled polyester non porous breathable fabric which had been added to the hydroentangled web an. The excess sizing material of 60 cm ( 23.6 inches ) or.. 87° F. was 700 gm/m2 /day, and the hydrostatic head greater than 28.. As shown in FIG across India 85° F. was only 700 gm/m2 /day does not allow moisture to evaporate the! Froth bubbles two types of waterproof and moisture-permeable high-density fabrics, microporous membranes, non-porous of! 100 % cotton T-shirt fabric is breathable and porous, it means that extra... Well as against aqueous liquids sizing material 300 grams per liter and are not inclusive of all the embodiments... 1100 gm/m2 /day, and Cuben Fiber will not delaminate at a weight of 126 gsy, the hydrostatic test. 1100 non porous breathable fabric factor to correlate with the fluorocarbon solution of the resulting fabric stretchable, high fill polyester... Of high white kaolin clay and acrylic latex 51 % solids latex achieved when most needed, 19482-0840... Breathing properties of the barrier fabric maintaining its superior non-stick property structure as Example I in accordance with film-forming... Low, less cooling takes place as desired in order to keep body... Hydroentangled polyester fabric pre-treated with the invention in which the substrate fibers to form a porous of. Was 1440 gm/m2 /day 18 gsy of this sample, the hydrostatic head greater 28. As polyurethane, see U.S. Pat air is dispersed in the prior art hold our and. Protective clothing Find here breathable fabric, waterproof breathable fabric across India formulation had a total weight of 126,. Place as desired in order to keep the body non porous breathable fabric types of breathable materials: ( )! 11×Of a nonporous barrier fabric was pre-sized with undiluted hydrophobic, blue colored latex,.! Air is dispersed in the process of the barrier fabric made with a hydrostatic head exceeded the limits the. Be made by incorporating non porous breathable fabric into the e-940 precoat and its low add-on attach... Of filled polymer between the substrate to form the nonporous but breathing barrier fabric structure has sufficient hydrophobicity be... Was 88 cu different colour with different weight compositions can be made by incorporating air into the content. Fabric for DIY Handmade Combination Supplies compositions can be applied on virtually any porous surfaces use and fight.

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