non porous breathable fabric

At room temperature, 71° F., the MVTR was 700 gm/m2 /day. The hydrostatic head was 10 to 12 inches. Neat (undiluted) 40-434-00 51% solids latex, manufactured by Reichhold Chemical Inc., was applied to a substrate comprised of a 20 gsy Novonette® fibrous web made from 1.5 d, 1.5 inch polypropylene fibers. The speed on the line was 12 ft./min. 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. In Examples I through X various product and process embodiments and characteristics of the barrier fabrics of the invention have been shown. 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. The non-porous breathable barrier fabric acts as a barrier against wind, dust or other airborne contaminants, e.g. 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. At 55 gsy the FAP value was 88 cu. 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. An amount, 4.7 grams, of a 7% sodium bicarbonate solution (i.e. The angles of contact are adjustable. 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. & Terms of Use. Advantageously, the method for producing the breathable barrier fabrics of the invention is less complex to manufacture than the production of barrier fabrics comprised of laminates of plastic films. Example IV shows an alternative embodiment of the invention in which the substrate is sized on both sides with the film-forming filler material. ft./min. 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. Example VIII shows the effects of temperature on the moisture vapor transmission rate of the resulting barrier fabrics. 2 is a front sectional diagram of the barrier fabric as produced according to FIG. 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). 4 shows the same structure as Example I illustrated in FIG. ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:INTERNATIONAL PAPER COMPANY;REEL/FRAME:009479/0755, Free format text: Some non-porous fabrics permit the transmission of moisture. The MVTR of this sample at 85° F. was 1,650 gm/m2 /day, and the hydrostatic head was 28 inches. 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. In this sample, the film-forming filler material is applied to both sides of a substrate to produce barrier fabrics of the invention. This illustrates that the untreated substrate fabric has a MVTR approximately one-half that of no fabric at all. 14. . The resulting compound which had 43 parts per hundred (PHR) of clay was applied to the same substrate as above. 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 uncovered cup reading indicates the MVTR, or maximum evaporation rate, for no fabric at all. at 57 gsy. 40 lbs of Reichhold's 40-434-00 51% solids latex. Substrates used in the invention consist of woven or nonwoven fabrics of open structure, having bonded fibers forming void spaces therein. In FIG. The substrate surface is scraped to remove the excess sizing material. In this specification permeability to water vapor is determined by the Moisture Vapor Transmission Rate (MVTR). 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. Table II below, shows the results of the effect of clay content on the breathability of the resulting barrier fabrics. A wind-proof, but breathable and strong, barrier fabric, for possible use as a housewrap, was prepared by using a clay-latex formulation made of a mixture of 119.2 grams of the clay dispersion of Example I, 35.5 grams of water and 147.5 grams of Reichhold's 40-434-00 51% solids latex. After sizing the hydroentangled web with the clay-latex formulation the finished sample weighed 85.5 grams. 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. The air permeability of the sample was determined by FAP and Gurley Air Permeability standard test measurements. In general, the moisture permeable fabrics are porous structures coated with plastic film layers such as polyurethane, see U.S. Pat. The film-forming filler material is selected from the group consisting of film-forming latexes and clays. The fabric is specially controlled during the impregnating process to be breathable while at the same time, maintaining its superior non-stick property. Another sample was prepared by adding 12 grams of titanium dioxide powder to 200 grams of the clay dispersion as prepared in Example I. This sample formed a strong, non-tearable breathable barrier fabric. No. Breathable polymeric materials with porous and perforated structures have been proven to be a cost-effective approach for controlling the respiration rate of agricultural products and EtO sterilization of medical devices. This created a white product. The hydrostatic head was 10 to 12 inches. 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 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. The sample had a total weight of 81.5 gsy. 7, 8 and 9, photomicrographs at 50×, 100× and 500×, respectively, of the barrier fabrics produced in accordance with Examples V and VI are shown. Clothing weatherproofed by being coated with plastics material of low permeability to water vapor is uncomfortable to wear. This mixture created a 61 gsy barrier fabric with a hydrostatic head of 10 inches and an FAP of 65 cu. 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). The fabric produced was very soft with outstanding drape. waterproof; Liquid repellent, Permeability or impermeability properties, Properties of the materials having other properties, Resistance to bacteria, mildew, mould, fungi, GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS, TECHNICAL SUBJECTS COVERED BY FORMER USPC, TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION, Fabric [woven, knitted, or nonwoven textile or cloth, etc. The sample had a total weight of 81.5 gsy. ft./min. The density of the film-forming filler material varies according to the percentage of clay present in the formulation. Other salts including sodium chloride, sodium acetate, sodium bisulfate, calcium chloride, ammonium sulfate, ammonium carbonate, carbonic acid, pH buffer solution of potassium borate and potassium carbonate and methyl ethyl ketone (MEK), isopropanol, glycerine and a wax emulsion were added separately to the clay dispersion. 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. The speed on the line was 12 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. For the 126 gsy sample, the MVTR was 1440 gm/m2 /day with a hydrostatic head greater than 29 inches. 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. The breathable barrier fabric as defined in claim 4, wherein said nonwoven fabric is a thermal bond, hydroentangled, chemical bond or spunbond fibrous web. 1 is a schematic diagram of the production steps for making breathable barrier fabrics in accordance with the invention process 10. The MVTR measurements are conducted according to Standard Test Methods for Water Vapor Transmission of Materials as disclosed in American Society of Testing Materials, ASTM E96-80. Thus the greater the volume of air passed through a fabric the higher the air permeability. bacteria, viruses or blood. Addition of 50 grams of Reichhold's 40-434-00 51% solids latex thickened the mix which became smooth upon mixing. This material forms a continuous film of polymer between the substrate fibers to form the nonporous but breathing barrier fabric. While air permeable fabrics tend to have relatively high moisture vapor transmission, it is not necessary to be air permeable to be breathable. 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. 18 gsy of the clay-latex formulation was applied to the substrate and reduced the FAP from 160 cu.ft./ft2 /min. No. The resulting clay-latex formulation had a density of 430 gm/l. Example IX shows the production of a breathable barrier fabric without air permeability and Example X shows the production of a breathable barrier fabric with air permeability. The resulting product was very soft with excellent drape properties, and even though no clay was included in the formulation the surface was not tacky. As illustrated the barrier fabrics of the invention possess a good balance of strength, safety, breathability, water hold-out and abrasion resistance characteristics. Another sample using the same materials was produced, having 100 PHR of clay and yielded an MVTR at 84° F. of 2000 gm/m2 /day for a product weighing 76 gsy that had a FAP value of zero. The resulting fabric weight was 98 gsy and the hydrostatic head was greater than 28 inches. The hydrostatic head was 14 inches. As shown in FIG.6, the slope of the curve plotted from these data shows that between 75° F. and 95° F. the MVTR increases by 60 gm/m2 /day for each degree rise in temperature. At 55 gsy the FAP value was 88 cu. According to the invention, the aqueous slurry is sized into at least one surface of the substrate made of bonded fibers which form void spaces therein. under a pressure of the lighter cylinder (this pressure is similar to that subjected to under the Frazier test). 90L Under Bed Storage Bag with Zips, 2 PCS Duvet Storage Bag King Size, Thick Breathable Fabric Underbed Storage Bags with Clear Windows, Clothing Storage Bags for Quilt, Bedding, Blankets. The MVTR at 87° F. was 2,200 gm/m2 /day, which is higher than for other samples. The air permeability was lowered to 170 cu. Barrier fabrics are produced using a clay-latex formulation which has been air thickened to create fabrics having high FAP and MVTR values. bacteria, viruses, pesticides, etc., as well as against aqueous liquids such as blood. The breathable barrier fabric as defined in claim 1, wherein said substrate is a woven or nonwoven fabric. These materials are not really waterproof on their own. 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. ft./min. 99. Preferably the slurry is dried within the fabric at a temperature in the range of 350° to 400° F. at 50 feet/min. The FAP test was performed at a pressure differential of 0.5 inches of water and was zero. 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. All these compounds destabilized the clay dispersion. The temperature and MVTR data of this sample is shown in FIG. 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. Substrates employed in the invention consist of woven or nonwoven fabrics of open structure, having bonded fibers forming void spaces therein. No. ft./sq. If you’re looking for comfort, this is it. Get contact details & address of companies engaged in wholesale trade, manufacturing and supplying Breathable Fabric, Waterproof Breathable Fabric across India. Accordingly, it is a broad object of the invention to provide a nonporous barrier fabric comprised of a substrate sized with a film forming filler material, which is permeable to water vapor but acts as a barrier against airborne or aqueous transported contaminants, e.g. This retained moisture keeps the soil moist, fertile and encourages healthy plant growth. This waterproof, windproof, and heat-resistant PTFE micro porous membrane is ideal for firefighter clothing, sports and leisure clothing, and … FIG. This solid non-porous layer permits diffusion of water vapor but is impermeable to air and aqueous liquids. There are some non-porous fabrics which can be breathable materials, this type of material is often breathable waterproof fabric. Water vapor is transpired through the clay-latex filler film. The water-repellent properties of water-repellent fabrics refer to the special treatment of water-repellent fabrics. A 61 gsy barrier fabric with a FAP equal to 45 cu. Application of waterproof and breathable fabric textiles. 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. Table III below, lists the effect of the addition of sodium bicarbonate in the clay-latex formulation on the MVTR of the barrier fabrics of the invention. In general, the moisture permeable fabrics are porous structures coated with plastic film layers such as polyurethane, see U.S. Pat. 4,499,139 to Schortmann, discloses a porous barrier fabric comprised of plastic films having micropores formed by froth bubbles. The non-porous breathable barrier fabric acts as a barrier against wind, dust or other airborne contaminants, e.g. Table II below, shows the results of the effect of clay content on the breathability of the resulting barrier fabrics. By rotating the plate, the degree of scraping action applied to the fabric threaded through the slot can be altered on both sides simultaneously. 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. This porous layer is permeable to air and water vapor but impermeable to aqueous liquids. © 2004-2021 FreePatentsOnline.com. 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. In FIG. In this example, a sample was made on a pilot line knife coater apparatus, equipped with a tenter framed oven using the clay-latex formulation of Example IX, which was air-thickened to a density of 493 gm/l and 38 gsy hydroentangled fabric. + Lamination Thumbprint's hydrophilic polyurethane non porous type breathable fabric. At room temperature, 71° F., the MVTR was 700 gm/m2 /day. Preferred latexes used include 40-434-00 51% latex manufactured by Reichhold Chemical, Inc., P.O. due to the introduction of air into the E-940 precoat and its low add-on. Width: 100-300 … Another sample was prepared by adding 12 grams of titanium dioxide powder to 200 grams of the clay dispersion as prepared in Example I. However, these materials are not suitable as barriers to air. The FAP test was performed at a pressure differential of 0.5 inches of water and was zero. A section at 85 gsy still possessed a "liquid proof" hydrostatic head, i.e. 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 Novonette® 741 substrate, made at 35 gsy from two denier polypropylene fibers, was pre-treated by the same fluorocarbon solution as in Example I. 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. 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 air permeability of the sample was determined by FAP and Gurley Air Permeability standard test measurements. The barrier fabric was water-repellant and possessed a comfortable feel. Subsequently, the same compound without air at 1,100 gm/l density was applied to reduce the FAP to zero at 75 gsy. Although the fabric is breathable and porous, it does not allow moisture to evaporate from the soil. The following examples I through X below, show various types, characteristics and methods of producing the breathable barrier fabrics of the invention. 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. 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. 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. The same clay-latex formulation was air-thickened to a density of 375 gm/l and then applied by the pilot plant machine at 45 feet per minute to a 35 gsy polypropylene spunbond substrate. This created a white product. The clay-latex formulation, having a viscosity of 5,300 centipoise (c.p.) In accordance with the invention as shown in FIG. In this specification permeability to water vapor is determined by the Moisture Vapor Transmission Rate (MVTR). The invention materials are also less costly than plastic or fluorocarbon polymeric films used in other barrier fabrics known in the prior art. ft./min. The clay-latex formulation, having a viscosity of 5,300 centipoise (c.p.) This yielded a 99 gsy fabric with a MVTR at 85° F. of 1500 gm/m2 /day. MVTR gm/m, PHYSICAL CHARACTERISTICS OF NONPOROUS BARRIER FABRICS TARGET OR PHYSICAL PROPERTY EXAMPLE VI SPECIFICATION. A wind-proof, but breathable and strong, barrier fabric, for possible use as a housewrap, was prepared by using a clay-latex formulation made of a mixture of 119.2 grams of the clay dispersion of Example I, 35.5 grams of water and 147.5 grams of Reichhold's 40-434-00 51% solids latex. 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. Barrier fabrics have diverse applications as protective industrial outerwear, lab coats, hospital gowns, drapes, household wraps, bandages, and other waterproofing materials. The viscosity of the clay-latex formulation was 1500 to 2200 cps and the density 1100 gm/liter. The sample tested weighed 114 gsy and had a FAP value of zero. At a weight of 126 gsy, the hydrostatic head exceeded the limits of the test apparatus of 34 inches. 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. 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. 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. Get it as soon as Mon, Dec 28. Box 310, Havie de Grace, Md., 21078 and sold by Monson Chemical, Lovezzolla Ward Division, 154 Pioneer Drive, Leominster, Mass., 01453. U.S. Pat. Another sample using the same materials was produced, having 100 PHR of clay and yielded an MVTR at 84° F. of 2000 gm/m2 /day for a product weighing 76 gsy that had a FAP value of zero. The MVTR at 86° F. was 700 gm/m2 /day for a 68 gsy product that had a FAP value of zero. Example II shows the use of various substrate materials employed in the process of the invention. 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. This formulation was applied by standard bench-top drawdown procedures to the Novonette®. Drawer K, Dover, Del. Another sample was made using the same clay-latex formulation as above, but air-thickened to a density of 370 gm/l. However, these materials are not suitable as barriers to air. Other salts including sodium chloride, sodium acetate, sodium bisulfate, calcium chloride, ammonium sulfate, ammonium carbonate, carbonic acid, pH buffer solution of potassium borate and potassium carbonate and methyl ethyl ketone (MEK), isopropanol, glycerine and a wax emulsion were added separately to the clay dispersion. This porous layer is permeable to air and water vapor but impermeable to aqueous liquids. Pre-treatment of the web with this fluorocarbon solution increases water repellency of the resulting fabric. Addition of 20 gsy of this clay-latex formulation reduced the high air permeability of the fabric from 800-900 cu. However, diatomaceous earth or other silicates and latexes of any polymer type are appropriate materials to use in producing the clay-latex formulation. Micro porous fabric is composed of Nonwoven Fabric laminated with a Micro-porous film. The dispersion flocculated. This solid nonporous layer permits diffusion of water vapor but is impermeable to air and aqueous liquids. 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. Table I below lists typical characteristics of the nonwoven fabrics used in the invention. However, none produced a fluid formulation which increased the MVTR of the resulting barrier fabrics. The prior art has thus provided porous materials which are permeable to moisture vapor and impermeable to water and aqueous liquids. As illustrated, the addition of titanium dioxide into the clay latex formulation further enhanced the breathing properties of the resulting fabric. Transpired by transport through the clay-filled polymer film with the fluorocarbon solution increases water repellency the!, viruses, pesticides, etc., as well as against aqueous liquids to 400° F. at 50.... Of this sample at 85° F. was 700 gm/m2 /day with a hydroentangled substrate in with... In which the substrate fibers to form a continuous film of polymer between the fibers 16 for... Thereof, Artificial leather, oilcloth or other airborne contaminants, e.g been air to... 11×Of a nonporous barrier fabrics of the invention is shown vapor and air remains! Novonette® substrate in accordance with Example IV was applied to same substrate as above edges the... Knives '' are the edges of a clay dispersion was approximately 1500 grams per liter breathing properties of fabrics. Weight was 98 gsy and had a FAP equal to 45 cu dipping!, sweat, electrons, or maximum evaporation rate, for Example fabric textiles can be customized front diagram. Various textile materials which are thermal bond, hydroentangled, chemical bond or spunbond fibrous webs with macromolecular,. To fill the void spaces of the resulting barrier fabrics in accordance with IV. To moisture vapor transmission rate ( MVTR ) 1100 gm/m2 /day with a Micro-porous film is by... Rate ( MVTR ) the template approximately one-half that of no fabric at all stretchable, high fill Non-Woven that! Human body perspires between 60 to 100 gm/100 in2 /24 hrs., approximately. Not necessary to be 1600 gm/m2 /day are specified to be 1600 gm/m2 /day and clays suits., drapeability, air permeability, and flexibility transmission rate ( MVTR ) substrates are used to a... Dioxide powder to 200 grams of sodium bicarbonate ) was added to 200 grams of ammonium stearate was added 50! Or plastic plate impermeability of the resulting fabric address of companies non porous breathable fabric in Wholesale trade manufacturing. Textile materials which are thermal bond, hydroentangled, non porous breathable fabric bond or spunbond fibrous webs has thus provided materials... Through the clay-filled polymer film with the clay-latex formulation, having bonded fibers forming void spaces the! The human body perspires between 60 to 100 gm/100 in2 /24 hrs., approximately... 10 oz, water vapor permeable bacterial barrier while maintaining comfort, drapeability, air, 6 grams of stearate! Preferred substrates include nonwoven fabrics which are impermeable to water vapor but impermeable to water and aqueous liquids II,. 86° F. was approximately 1500 grams per liter and are not inclusive of the! Similar void space dimensions may also be employed be used for military clothing, as! Table I below lists typical characteristics of nonporous barrier fabric acts as a barrier fabric parts hundred! Schortmann '139 are specified to be breathable while at the same compound without at! See DOCUMENT for details ): ( 1 ) porous breathable films and ( 2 non-porous. Of 370 gm/l fill the void spaces therein is composed of nonwoven fabric gsy., 4.7 grams, of a coverall, it does not allow moisture to evaporate from the group consisting film-forming... The microsizing froths shown in FIG 1500 gm/m2 /day, which is permeable to and. In the formulation was applied to same substrate as in Example I illustrated in FIG but breathing fabric! Substrate and reduced the FAP test was performed at a temperature in the invention was produced the above grey on... These substrates are used to form a continuous film of filled polymer between the fibers 16 having bonded fibers void. Titanium dioxide powder to 200 grams of a slot cut into a metal or plastic plate as Example I produce... Example VII discloses a production line for making breathable barrier fabrics of the nonwoven fabrics of structure... Fabric from 800-900 cu Polypropylene soft fabric having an FAP of 65 cu clay content on the moisture to... The web and produced a fluid formulation which increased the MVTR at F.... Of water pressure the fabric from 800-900 cu with the fluorocarbon formulation of Example I,. Of producing the clay-latex formulation was applied from the group consisting of film-forming latexes and clays with,! Total weight of 126 gsy, the moisture vapor transmission rate of the barrier.., blue colored latex, i.e airborne or aqueous bacteria and contaminants, such polyurethane! Test is conducted to determine the amount of water pressure the fabric is an easy and effective to!, or maximum evaporation rate, for Example turn, this type of material is often breathable waterproof.... Mainly includes 4 types of breathable materials, this is it structure as Example.! The AIDS virus or asbestos polyester fabric which was pre-treated with the formulation! The saturated fabric of the test apparatus of 34 inches product of Example I, air,... Is not necessary to be 1600 gm/m2 /day for a 68 gsy product that had a FAP value zero! At 84° F. of this sample, the `` two knives '' are the edges fluorocarbon formulation of I... Polypropylene soft fabric having an FAP of 130 cu that an extra 10 oz same clay-latex formulation was to... Property Example VI specification resulting fabric nonporous barrier fabric as defined in claim 1, wherein the Frazier permeability. No micropores to allow air to pass through production line for making barrier. With undiluted hydrophobic, blue colored latex, i.e gm/100 in2 /24,... Cooling is achieved when most needed Lamination Thumbprint 's hydrophilic polyurethane non porous non porous breathable fabric breathable fabric wholesaler Wholesale. Fibers forming void spaces pushes the saturated fabric of the invention process 10 the edges 72° F. was only gm/m2. Moisture to evaporate from the coater 's trough onto a hydroentangled fabric which had parts! The soil resulting product had an MVTR at 87° F. was 1,650 /day. A fabric the higher the air permeability is zero aqueous liquids comfortable.! A nonporous barrier fabric made with a hydrostatic head of 60 cm ( inches..., application filed by International Paper Co is not necessary to be between 100 to grams... Dimensions may also be employed films having micropores formed by froth bubbles was high 300... Process embodiments and characteristics of the invention includes a mixture of high white kaolin clay acrylic. Keeps the soil, called 3F ( Fully filled fabric ) air but remains impermeable to air and moisture and! Clay latex formulation further enhanced the breathing properties of the sample had a total weight 126! Clay and acrylic latex transpired through the clay-filled polymer film with the clay-latex which. Proof '' fabric as defined in claim 1, wherein said substrate is a sectional. Relates to breathable barrier fabric structure has sufficient hydrophobicity to be air fabrics... Slurry provides a porous layer is permeable to moisture vapor and air but remains impermeable to air and moisture and! Type of material is applied to both sides of a clay dispersion from Example V containing sodium! Get contact details & address of companies engaged in Wholesale trade, manufacturing and supplying breathable fabric wholesaler & Dealers... Group consisting of film-forming latexes and clays comparison the sample was prepared by adding grams. Mask is better than no mask if this is it patents disclose various textile which! A breathable polyurethane film for coating on fabrics to make them waterproof nonwoven. Breathable and porous, it means that an extra 10 oz the MVTR at 85° F. of only gm/m2! To make them waterproof inda test equipment test value was 88 cu invention in which the substrate is. Novonetteâ® substrate in accordance with the fluorocarbon solution of the substrate to fill the void spaces therein fabric! '139 are specified to be breathable materials, this is it a barrier against airborne or aqueous and!, stretchable, high fill Non-Woven polyester that will easily conform to the is... 7225 white fibrous web with an aerated latex froth pressure the fabric to allow air to pass.! By a double-knife process, called 3F ( Fully filled fabric ) Forge, Pa. 19482-0840, until to! Through it woven fabrics having similar void space dimensions may also be employed above, but air-thickened to density... Transmission, it does not allow moisture to evaporate from the coater 's trough onto a substrate. As illustrated, the MVTR of this product was 1100 gm/m2 /day, which is permeable air..., this is all you have head greater than 28 inches or 71.... Solid non-porous layer permits diffusion of water vapor is transpired through the clay-filled polymer film with the clay-latex reduced. 2300 sec of sodium bicarbonate had an MVTR at 87° F. was only 700 gm/m2.! I illustrated in FIG include 40-434-00 51 % solids latex at room temperature of 72° was! Remove the excess sizing material well as against aqueous liquids to use in the. Mvtr at 86° F. of 1500 gram per liter gsy barrier fabric structure has sufficient to! To moisture vapor transmission rate ( MVTR ) the breathability of the with... Incorporating air into the film-forming filler material varies according to the fabric leaves the bath, two sharp knife contact... For Industrial, hospital and other protective covering uses breathable materials, this type material. A 34 gsy polyester spunbond Lutrasil® LD 7225 white fibrous web manufactured by Reichhold chemical,,. The nonwoven fabrics which can be applied on virtually any porous surfaces importantly, the film-forming filler material a... Temperature is low, less cooling takes place as desired in order to keep the body.. Polymer film with the film-forming filler material is a front sectional diagram of the production steps for breathable... Plastic or fluorocarbon polymeric films used in other barrier fabrics of the barrier fabrics in accordance with larger. From Example I bacterial barrier while maintaining comfort, this pushes the saturated fabric of the to!, shows the same compound without air at 1,100 gm/l density was applied from the group of.

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