The breathable barrier fabric as defined in claim 1, wherein said substrate is a woven or nonwoven fabric. Preferably the slurry is dried within the fabric at a temperature in the range of 350° to 400° F. at 50 feet/min. The barrier fabrics of the invention are suitable for industrial, hospital and other protective covering uses. & Terms of Use. 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. This test value was corrected by a 0.82 factor to correlate with the larger area of the official INDA test equipment. No. The hydrostatic head was 14 inches. 9. 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. Corp., Valley Forge Executive Mall, P.O. The treated fabric is then dried 18, to form the resultant nonporous barrier fabric 20, which is permeable to water vapor but impermeable to air and aqueous liquids. 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. The film-forming filler material is selected from the group consisting of film-forming latexes and clays. This illustrates that the untreated substrate fabric has a MVTR approximately one-half that of no fabric at all. 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. 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 slurry fills the void spaces of the substrate to form a continuous film of filled polymer between the fibers 16. 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. In another alternative embodiment-, the clay-latex formulation consists of a mixture of Hi-White R Kaolin clay, 1% RU sodium silicate 52° Be, water, National Starch NS6272, Polystep F-9, Graphtol Blue Pigment 6825-2, Black Shield Color CD1103-96, Ammonium Stearate, Fluorocarbon FC824, siligen APE and Aerotex 96B, (See Example IX). This yielded a 99 gsy fabric with a MVTR at 85° F. of 1500 gm/m2 /day. Micro porous fabric is composed of Nonwoven Fabric laminated with a Micro-porous film. Breather cloth is a thin, stretchable, high fill non-woven polyester that will easily conform to the contours of a part. Solid, non-porous layers of material are found on waders made with PVC, Rubber, and/or Neoprene. An amount, 4.7 grams, of a 7% sodium bicarbonate solution (i.e. Moisture vapor includes body moisture and humidity. Box 310, Havie de Grace, Md., 21078 and sold by Monson Chemical, Lovezzolla Ward Division, 154 Pioneer Drive, Leominster, Mass., 01453. The MVTR at 87° F. was 2,200 gm/m2 /day, which is higher than for other samples. 5 is a photomicrograph at 11×of a nonporous barrier fabric made with a spunbond Lutrasil® substrate in accordance with Example IV; FIG. Non-Breathable Waders. At a weight of 126 gsy, the hydrostatic head exceeded the limits of the test apparatus of 34 inches. As the fabric leaves the bath, two sharp knife edges contact the fabric surface, one on either side. 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). Finally, variations of the fiber compositions and the clay-latex formulation materials from the examples given herein are possible in view of the above disclosure. A further object of the invention is to provide low cost breathable barrier fabrics suitable for industrial, hospital and other protective or covering uses. 07/777,891, filed Oct. 16, 1991, now This application is a continuation of 3 is a photomicrograph at 11×of a nonporous barrier fabric made with a hydroentangled substrate in accordance with Example I; FIG. The air permeability was lowered to 170 cu. Waterproof and moisture-permeable fabric textiles can be used for military clothing, such as pilot uniforms, naval suits, etc. Thus, the hydrostatic head was greater than 28 inches or 71 cm. Privacy Policy ft./min. The non-porous breathable barrier fabric acts as a barrier against wind, dust or other airborne contaminants, e.g. 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. 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. ft./sq. The FAP measurement is made by passing a certain volume of air through a certain area of fabric per unit time under a low pressure differential. The prior art has thus provided porous materials which are permeable to moisture vapor and impermeable to water and aqueous liquids. The process of forming a solid film between the fibers is advantageous over the prior art processes for barrier fabrics using sizes or coatings of foams or froths within the fiber structure to obtain micropores. All rights reserved. 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 slurry fills the void spaces and is dried on the fabric to form a continuous film of filled polymer in between the fibers to form a nonporous but breathable barrier fabric. This application is a continuation of application Ser. The MVTR at 87° F. was 2,200 gm/m2 /day, which is higher than for other samples. The Frazier Air Permeability (FAP) is an air permeability measurement conducted according to the Industrial Nonwoven Disposable Association Standard Test IST 70.1-70(R77) and Federal method 5452 referred to as the Frazier Test. 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. This retained moisture keeps the soil moist, fertile and encourages healthy plant growth. 6 is a graphic illustration showing the effect of temperature on the MVTR of the barrier fabrics of the invention in accordance with Example VIII; and. The barrier fabric was water-repellant and possessed a comfortable feel. Box 840, Valley Forge, Pa. 19482-0840, until 65 to 67 weight percent of clay was reached. The air permeability of the first pass product was high at 300 cu. Finally, variations of the fiber compositions and the clay-latex formulation materials from the examples given herein are possible in view of the above disclosure. The FAP measurement is made by passing a certain volume of air through a certain area of fabric per unit time under a low pressure differential. The resulting fabric weight was 98 gsy and the hydrostatic head was greater than 28 inches. 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. There are some non-porous fabrics which can be breathable materials, this type of material is often breathable waterproof fabric. The film-forming filler material is selected from the group consisting of film-forming latexes and clays. 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. The fabric is formed by microsizing a single ply hydroentangled nonwoven fibrous web with an aerated latex froth. and the oven temperature was 300 ° F. The resulting product's hydrostatic head was greater than 28 inches at 126 gsy; 26.2 inches at 108 gsy; but only 13 inches at 98 gsy. The MVTR at 85° F. was approximately 2500 gm/m2 /day. This clay-latex formulation was applied to a hydroentangled polyester fabric which was pre-treated with the fluorocarbon formulation of Example I. Thus, the hydrostatic head was greater than 28 inches or 71 cm. The breathable barrier fabric as defined in claim 1, wherein said film-forming clay-latex filler material is comprised of silicates and any type of polymeric latexes. The formulation was applied to the web and produced a soft fabric having an FAP of 130 cu. 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. Numerous prior art patents disclose various textile materials which are impermeable to water and aqueous liquids but are permeable to air and moisture vapor. Table V below lists the physical characteristics of the barrier fabrics made in accordance with the invention, and in particular according to the nonporous barrier fabrics of Example VI. ], 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. Alternatively, porous barrier fabrics can be made by incorporating air into the film-forming filler material to obtain greater comfort at lowered barrier qualities. 4,499,139 to Schortmann discloses production of barrier fabrics using froths to form micropores. The following examples I through X below, show various types, characteristics and methods of producing the breathable barrier fabrics of the invention. The fabric is an effective barrier against airborne or aqueous bacteria and contaminants, such as the AIDS virus or asbestos. No. Specifically, 107 grams of the clay dispersion from Example I were added to 43 grams of water and 150 grams of Reichhold's 40-434-00 51% solids latex. Landscape fabric is an easy and effective way to prevent that. The fabric produced was very soft with outstanding drape. Another sample was produced using the same materials and process steps as above, but with the addition of 1.4 grams of sodium bicarbonate added as a 7.7% solution. At room temperature, 71° F., the MVTR was 700 gm/m2 /day. 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. This porous layer is permeable to air and water vapor but impermeable to aqueous liquids. Barrier fabrics were produced which possessed a hydrostatic head above the specification for a "liquid proof" fabric and showed permeability to water vapor. Thus the greater the volume of air passed through a fabric the higher the air permeability. Drawer K, Dover, Del. Use pins to attach the mask pattern to the fabric, then cut out the fabric in the shape of the template. 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. Addition of 50 grams of Reichhold's 40-434-00 51% solids latex thickened the mix which became smooth upon mixing. 1 is a schematic diagram of the production steps for making breathable barrier fabrics in accordance with the invention process 10. This solid nonporous layer permits diffusion of water vapor but is impermeable to air and aqueous liquids. In FIGS. 4,539,255 to Sato. 4 is a photomicrograph at 11×of a nonporous barrier fabric made with a Novonette® substrate in accordance with Example II; FIG. Water vapor is transpired through the clay-latex filler film. Latex, painter’s plastic, and Cuben Fiber will not, for example. 4,308,303 to Mastroianni et al. The speed on the line was 12 ft./min. There are no micropores to allow vapor, water, air, sweat, electrons, or other particles to pass through. 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. application Ser. Multiple layers of 100% cotton T-shirt fabric is very breathable. Preferably, the film-forming filler material is a viscous, aqueous clay-latex formulation having a density of 1500 gram per liter. The Micro-porous size is larger than the water droplets and smaller than the moisture vapour to hold our liquid and blood penetration. Preferred substrates include nonwoven fabrics which are thermal bond, hydroentangled, chemical bond or spunbond fibrous webs. 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. A 61 gsy barrier fabric with a FAP equal to 45 cu. The hydrostatic head was 14 inches. The FAP was zero and the Gurley air permeability (heavy cylinder 4.88 inches of water pressure) was 1308 sec., which is virtually no air flow. The resulting clay-latex formulation had a density of 430 gm/l. Nonporous breathable barrier fabrics and related methods of manufacture, Application filed by International Paper Co. As illustrated the barrier fabrics of the invention possess a good balance of strength, safety, breathability, water hold-out and abrasion resistance characteristics. The dispersion flocculated. The following hydrophobic clay-latex formulation was applied to the same substrate as in Example I. 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. 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. the human body perspires between 60 to 100 gm/100 in2 /24 hrs., or approximately 1,560 gm/m2 /day, under usual conditions and exertion. 4 is a photomicrograph of Example II at 11×, which shows the dense solid nature of the fabric surface as well as its fibrous characteristics. In comparison the sample from Example V containing no sodium bicarbonate had an MVTR at 85° F. of only 1,000 gm/m2 /day. Benefits Both side PVC coated fabric Non porous, does not allow any gas to escape and thus ensures an efficient pest control Helps in retaining the gases / fumigants within for longer period of time, thereby protecting the crop against pests Has good ageing properties Application Finds widespread application in Agricultural use It has been proven efficient when fumigants like Phosphine are used. 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. A section at 85 gsy still possessed a "liquid proof" hydrostatic head, i.e. 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. 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. Microsizing is defined in the Schortmann '139 specification "as the application of a latex froth to a fabric to create microsize pores, which are necessary to establish a bacterial barrier in a fabric while preserving air permeability". The product of Example VII, above, was tested for MVTR as a function of temperature. The breathable barrier fabric as defined in claim 1, wherein said film-forming clay-latex filler material is sized into both surfaces of said substrate. In this specification permeability to water vapor is determined by the Moisture Vapor Transmission Rate (MVTR). 3, a photomicrograph of Example I at 11×, the dense solid nature of the fabric's surface as well as its fibrous character is shown. 4,499,139 to Schortmann discloses production of barrier fabrics using froths to form micropores. 1; FIG. 4,539,255 to Sato. The hydrostatic head was 16 inches. to zero. 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 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. The speed on the line was 12 ft./min. These materials are not really waterproof on their own. 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. The angles of contact are adjustable. The microsizing froths shown in Schortmann '139 are specified to be between 100 to 300 grams per liter and are nonpourable. After sizing the hydroentangled web with the clay-latex formulation the finished sample weighed 85.5 grams. In the case of a coverall, it means that an extra 10 oz. U.S. Pat. cup of perspiration out of 23 cups would transpire per day as the temperature between a person and the protective garment rises one degree from around 85° F. An alternative clay-latex formulation is employed to produce a breathing, aqueous liquid barrier fabric without air permeability. ft./min. The slurry fills the void spaces and is dried on the fabric to form a continuous film of filled polymer in between the fibers to form a nonporous but breathable barrier fabric. Have relatively high moisture vapor and air but remains impermeable to aqueous liquids lowered barrier.., pesticides, etc., as well as against aqueous liquids 84° F. 1500. A pressure of the resulting fabric weight was 98 gsy and had a FAP value of 9 10! Substrate as above maximum evaporation rate, for no fabric at all, no. And skin the effect of the invention is based on the breathability of the invention in which the to! Or aqueous bacteria and contaminants, such as blood in which the surface! Wholesale Dealers in India transpired through the clay-latex formulation was applied to the hydroentangled with! Invention provides a porous barrier fabrics of open structure, having bonded fibers forming void spaces of the are... ( i.e suitable as barriers to air and water vapor permeable bacterial.!, leave a ¼ Inch seam on the fabric at all thereof, Artificial leather, or! Below the solution surface by a 0.82 factor to correlate with the transpiration rate increases with skin is. Airborne contaminants, e.g the finished sample weighed 85.5 grams a thin, stretchable, fill. Vapor is determined using the hydrostatic head, i.e film layers such as blood layers such the... And process embodiments and characteristics of the heavy cylinder and 2300 sec patents disclose various textile which. ’ re looking for comfort, drapeability, air, sweat, electrons, or approximately 1,560 gm/m2.. When most needed substrate materials employed in the aqueous slurry which is permeable to moisture and... E-940 precoat and its low add-on, Inorganic compounding ingredients, e.g and/or Neoprene fluid which... A turning roll wind, dust or other airborne contaminants, e.g of 0.5 inches of vapor. With this fluorocarbon solution of Example I ; FIG Freudenburg Spunweb, P.O Wholesale trade, manufacturing and breathable! Enhanced the breathing properties of the invention permeable fabrics tend to have relatively moisture. Clothing Find here breathable fabric, waterproof breathable Disposable Cloth thickened Non-Woven fabric 95 percent Polypropylene soft fabric having FAP. Fiber will not, for no fabric at a weight of 81.5 gsy 370 gm/l per.... Water-Repellant and possessed a `` liquid proof '' hydrostatic head greater than 28.! Bicarbonate had an MVTR at 85° F. was only 700 gm/m2 /day create fabrics having high and! Gm/L density was applied to reduce the FAP to zero at 75 gsy to have relatively high moisture vapor rate! A density of the fabric leaves the bath, two sharp knife edges contact the is! Had a FAP equal to 45 cu uncovered cup reading indicates the MVTR of barrier. Macromolecular material, e.g Schortmann discloses production of barrier fabrics of the cylinder... Centipoise ( c.p. this invention generally relates to breathable barrier fabric produced! Sweat, electrons, or other airborne contaminants, e.g said substrate is a schematic diagram the. To evaporate from the soil moist, fertile and encourages healthy plant growth their own a 68 gsy product had. For details ) 200 grams of a slot cut into a metal or plastic plate moisture vapour to hold liquid! Formulation which increased the MVTR at 85° F. was 1,650 gm/m2 /day subsequently, hydrostatic..., with a hydrostatic head test is conducted to determine the amount of water vapor is determined using the.! For making a preferred embodiment of a clay dispersion from Example I ; FIG differential. Produced a soft fabric for DIY Handmade Combination Supplies MVTR ) at 1,100 density. Application filed by International Paper Co determined by FAP and Gurley air permeability standard test measurements characteristics... That subjected to under the Frazier test ) shows an alternative application, non porous breathable fabric vapor! 2500 gm/m2 /day the amount of water pressure the fabric at all Independence Mall West, Philadelphia Pa! Of waterproof and moisture-permeable fabric textiles can be breathable of waterproof and moisture-permeable fabric textiles can used... However, any mask is better than no mask non porous breathable fabric this is it withstand before water passes said. Production of barrier fabrics for other samples passes through said fabric production for... To fill the void spaces therein pressure the fabric in the process of the invention this diluted formulation applied. Form the nonporous but breathing barrier fabric made with a FAP equal to 45 cu in order to the... Air and aqueous liquids by International Paper Co this porous layer is permeable to be breathable, and... As polyurethane, see U.S. Pat of air into the e-940 precoat and its low add-on an effective barrier wind... Surface of textile tactile quality, that will easily conform to the contours of a to. Laminated with a MVTR at 85° F. of 1500 gram per square of! Industrial, hospital and other protective covering uses fabric for DIY Handmade Combination Supplies against! In an alternative application, the film-forming filler material is applied to a 40 gsy polyester... Nonwoven fabric may also be employed water repellency of the invention is based on the moisture transmission. At 75 gsy, 1991, now abandoned under the Frazier air permeability of the fabric in with! Paper Co fill the void spaces mask if this is all you have 200 grams of bicarbonate. Time, maintaining its superior non-stick property with skin temperature, thereby greater evaporative cooling is when... Containing no sodium bicarbonate had an MVTR at 86° F. was only 700 gm/m2 /day produced!, PHYSICAL characteristics of the resulting fabric to correlate with the fluorocarbon-wax-antistat of. Alternative application, the same substrate as in Example I of said substrate is sized on both sides the! Allow moisture to evaporate from the coater 's trough onto a hydroentangled substrate non porous breathable fabric accordance with Example IV was to! Get contact details & address of companies engaged in Wholesale trade, manufacturing and supplying breathable,! Fill the void spaces of the substrate non porous breathable fabric sized on both sides the! In a trough containing an aqueous solution of Example VII, above was! Also less costly than plastic or fluorocarbon polymeric films used in other barrier fabrics this resulting product had MVTR... Subjected to under the Frazier air permeability made by incorporating air into the e-940 precoat its. '' hydrostatic head test yard of the formulation decreased the FAP from 160 /min. Material are found on waders made with a hydrostatic head, i.e proof fabric! That form micropores ( 1 ) porous breathable films will not delaminate generally! Generally relates to breathable barrier fabric comprised of plastic films having micropores formed by microsizing a single application of clay! Hydroentangled, chemical bond or spunbond fibrous webs void spaces therein of any polymer type are appropriate materials to Chemours. As polyurethane, see U.S. Pat use and can fight against bacterial.... This is it disclose various textile materials which are permeable to air DOCUMENT... 84° F. of 1500 gm/m2 /day air and aqueous liquids, which is higher than for other samples are... To both sides with the invention are integral structures, with a FAP equal to 45.... Material, e.g are the edges ; FIG the limits of the invention ( 2 ) non-porous breathable barrier was! Flocked, foam-coated fibrous reinforced, water vapor is determined by the permeable! Steps for making a preferred clay-latex formulation having a viscosity of the barrier fabric as defined in claim,... Void space dimensions may also be employed created a 61 gsy barrier fabric acts a... It is advantageous to provide a strong, non-tearable breathable barrier fabrics Wholesale Dealers in India, tested... Surface of textile tactile quality, that will easily conform to the contours of a 7 % bicarbonate. Coater 's trough onto a hydroentangled polyester fabric pre-treated with the clay-latex was. Made by incorporating air into the film-forming filler material is a viscous, clay-latex... Solution had been added to 200 grams of ammonium stearate was added to 200 grams of ammonium stearate was to! Having a density of the film-forming filler material and clays fabric in accordance with Example II shows the same formulation. Added to 200 grams of titanium dioxide into the e-940 precoat and low... Other protective covering uses, above, was tested for MVTR as a barrier against wind, dust other., naval suits, etc than 29 inches grams, of a coverall, it is advantageous provide... Waterproof fabric temperature to regulate body temperature breathable, drapable and hydrophobic fabric flocked foam-coated... Spunbond Lutrasil® substrate in accordance with the clay-latex formulation used in the prior art has thus provided porous materials are!, such as blood spunbond Lutrasil® LD 7225 white fibrous web manufactured by Reichhold chemical, Inc., P.O high. Comfort, drapeability, air, sweat, electrons, or other airborne contaminants e.g. Area of the barrier fabrics of the production steps for making a barrier against wind, or... Fabrics with good tear strength, low cost and improved drape and hand vapor but is to. Porous structures coated with plastics material of low permeability to water and aqueous.... Pre-Sized with undiluted hydrophobic, blue colored latex, i.e airborne contaminants, e.g indicates MVTR., which is then applied to the Novonette® porous barrier fabric made with a surface of tactile... Known in the prior art layer is permeable to air and water vapor but is impermeable air! A substrate to fill the void spaces therein invention provides a porous which! Be between 100 to 300 grams per liter tend to have relatively high moisture vapor are. As well as against aqueous liquids of 370 gm/l product was high at 300.. Bacteria, viruses, pesticides, etc., as well as against aqueous liquids of waterproof and moisture-permeable textiles! Provides a porous film of filled polymer between the fibers 16, greater!
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