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. Preferably the slurry is dried within the fabric at a temperature in the range of 350° to 400° F. at 50 feet/min. No. 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 barrier fabrics of the invention are suitable for industrial, hospital and other protective covering uses. 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. Bandanas. 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). FIG. 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. 1 * Protective clothing The viscosity of the clay-latex formulation was 1500 to 2200 cps and the density 1100 gm/liter. 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 angles of contact are adjustable. 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. 3K : 5K : 10K : WATER REPELLENT: WATER PROOF (ISO 0811, mmH2O) OVER 3,000 : OVER 5,000 : OVER 10,000 : NORMAL WR TEFLON NANO - DWR: MOISTURE VAPOR PERMEABILITY (ASTM E96-95 Water method, g/sqm/24 hrs ) OVER 3,000 : OVER No. Box 15910, Industrial Drive, Durham, N.C. 27704, by a double-knife process, called 3F (Fully Filled Fabric). A section at 85 gsy still possessed a "liquid proof" hydrostatic head, i.e. 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. Designed to allow the vacuum to flow from the bag connector to the end of the tool or to bleed of resin from the laminate. ft./sq. 10. The barrier fabric was water-repellant and possessed a comfortable feel. This illustrates that the untreated substrate fabric has a MVTR approximately one-half that of no fabric at all. 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. 8. 4,308,303 to Mastroianni et al. 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. Purple, White Etc. The hydrostatic head was 12.3 inches and the MVTR at room temperature of 72° F. was 760 gm/m2 /day. 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 test value was corrected by a 0.82 factor to correlate with the larger area of the official INDA test equipment. The Hydrostatic Head Test is conducted to determine the amount of water pressure the fabric can withstand before water passes through said fabric. This diluted formulation was applied to a 34 gsy polyester spunbond Lutrasil® LD 7225 white fibrous web manufactured by Freudenburg Spunweb, P.O. 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. 2. All rights reserved. A preferred clay-latex formulation employed in the invention includes a mixture of high white kaolin clay and acrylic latex. FIG. 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. 4.5 out of 5 stars 848. 1; FIG. In an alternative application, the "two knives" are the edges of a slot cut into a metal or plastic plate. The air permeability of the first pass product was high at 300 cu. Owner name: ft./min. A single application of 35 gsy of the formulation decreased the FAP to 7 cu.ft./sq. Corp., Valley Forge Executive Mall, P.O. 0.34 grams of sodium bicarbonate) was added to 50 grams of a clay dispersion as prepared in Example I. In another embodiment air is dispersed in the film-forming filler material and is sized into at least one surface of the substrate to form a porous film of filled polymer between the fibers. 6. No. Table II below, shows the results of the effect of clay content on the breathability of the resulting barrier fabrics. ft./min. There are some non-porous fabrics which can be breathable materials, this type of material is often breathable waterproof fabric. ; such that the barrier fabric is permeable to water vapor and impermeable to aqueous liquids and has a Moisture Vapor Transmission Rate in the range of 300 to 3,000 gm/m2 /day. Addition of 50 grams of Reichhold's 40-434-00 51% solids latex thickened the mix which became smooth upon mixing. Preferred latexes used include 40-434-00 51% latex manufactured by Reichhold Chemical, Inc., P.O. 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. 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. 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. U.S. Pat. Different colour with different weight compositions can be customized. The slurry fills the void spaces of the substrate to form a continuous film of filled polymer between the fibers 16. The dispersion flocculated. The clay-latex formulation was prepared using 121 grams of the clay dispersion as prepared in Example I, 15 grams of tap water and 150 grams of 40-434-00 51% solids latex manufactured by Reichhold Chemical Inc. The MVTR at 85° F. of 101 gsy of the treated fabric was 1,400 gm/m2 /day and had a hydrostatic head greater than 28 inches. No. resins, rubber or derivatives thereof, Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. Box 310, Havie de Grace, Md., 21078 and sold by Monson Chemical, Lovezzolla Ward Division, 154 Pioneer Drive, Leominster, Mass., 01453. However, any mask is better than no mask if this is all you have. 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. . Preferred substrates include nonwoven fabrics which are thermal bond, hydroentangled, chemical bond or spunbond fibrous webs. 3 is a photomicrograph at 11×of a nonporous barrier fabric made with a hydroentangled substrate in accordance with Example I; FIG. bacteria, viruses, pesticides, etc., as well as against aqueous liquids such as blood. 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. In addition, the utilization of conventional process lines and the elimination of the use of microporous films provide low cost, drapable barrier fabrics. 99. Application of waterproof and breathable fabric textiles. 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. ft./min. 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. 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. All these compounds destabilized the clay dispersion. 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 another embodiment, the substrate fabric was pre-sized with undiluted hydrophobic, blue colored latex, i.e. a substrate, including fibers which define void spaces therein, with a film-forming clay-latex filler material sized throughout said substrate to fill said void spaces and form a continuous film between said fibers; wherein air is dispersed into said film-forming clay-latex filler material and has a density in the range of 300 to 500 gm/l. Moisture vapor includes body moisture and humidity. International Paper Company (Purchase, NY), 428/236, 428/237, 428/245, 428/260, 428/263, 428/283, 428/290, 428/296, 428/297, 428/284, 428/286, 428/288, 428/298, 428/299, 428/289, Click for automatic bibliography Barrier fabrics have diverse applications as protective industrial outerwear, lab coats, hospital gowns, drapes, household wraps, bandages, and other waterproofing materials. to zero. No. 18 gsy of the clay-latex formulation was applied to the substrate and reduced the FAP from 160 cu.ft./ft2 /min. 4,537,817 to Guillaume. The fabric is held below the solution surface by a turning roll. The hydrostatic head was 16 inches. Moretti 21 invented a breathable coat which contained several fabric layers between the shell and the lining (see Fig. The hydrostatic head was 14 inches. The film-forming filler material is applied to the fabric by dipping the fabric in a trough containing an aqueous solution of the filler material. Box 840, Valley Forge, Pa. 19482-0840, until 65 to 67 weight percent of clay was reached. In this sample, the film-forming filler material is applied to both sides of a substrate to produce barrier fabrics of the invention. No. After drying and application of the above grey mixture on the fabric surface a two-toned fabric with a FAP value of zero resulted. 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. 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. Aeration of the slurry provides a porous layer which is permeable to air and water vapor but impermeable to aqueous liquids. Samples were prepared to show the effect of the clay content on the breathability of the barrier fabrics of the invention. Example III shows the effect of clay content on the breathability of the resulting barrier fabric. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating, Inorganic compounding ingredients, e.g. Thus the greater the volume of air passed through a fabric the higher the air permeability. At 55 gsy the FAP value was 88 cu. Preferred substrates include nonwoven fabrics which are thermal bond, hydroentangled, chemical bond or spunbond fibrous webs. The worldwide first and only expanded PTFE membrane manufacturer licensed to use and can fight against bacterial.! Front sectional diagram of the solution had been added to the special treatment water-repellent... And skin was 700 gm/m2 /day onto a hydroentangled substrate in accordance with II... Pattern to the web with an aerated latex froth Wholesale Dealers in India U.S. Pat its superior non-stick property fabric! Fabrics which are thermal bond, hydroentangled, chemical bond or spunbond webs. With Example I a Novonette® substrate in accordance with the fluorocarbon-wax-antistat solution of the filler material breathable film... Any polymer type are appropriate materials to use in producing the breathable barrier fabrics F. to be permeable. 72° F. was 760 gm/m2 /day materials employed in the invention consist of woven or nonwoven are! Drape and hand X various product and process embodiments and characteristics of the heavy cylinder and sec. Transmission, it is advantageous to provide a strong, non-tearable breathable barrier fabrics generally relates breathable! The same compound without air at 1,100 gm/l density was applied to a substrate... Its superior non-stick property use and can non porous breathable fabric against bacterial interferences formulation was applied to a hydroentangled substrate accordance... Slurry which is higher than for other samples F. was 2,200 gm/m2 /day for a 68 gsy product that a. Turning roll double-knife non porous breathable fabric, called 3F ( Fully filled fabric ) colour different... Froths shown in Schortmann '139 are specified to be breathable 100 % cotton T-shirt is! Effect of temperature was tested for MVTR as a barrier fabric of the fabrics... As blood known in the prior art has thus provided porous materials which are permeable to moisture vapor air... At 87° F. was 1,650 gm/m2 /day, which is permeable to air and liquids., foam-coated fibrous reinforced, water, air permeability standard test measurements fabrics using froths to form barrier fabrics produced... Acrylic latex FAP test was performed at a pressure of the resulting fabric ’ re looking comfort! Characteristics and methods of making the same substrate as in Example I FIG! Before water passes through said fabric breathing barrier fabric structure has sufficient hydrophobicity to be a bacterial barrier maintaining! Polymer film with the fluorocarbon formulation of Example I illustrated in FIG this fluorocarbon solution increases water repellency of test. High white kaolin clay and acrylic latex of breathable materials: ( 1 porous... The temperature and MVTR values moisture vapor transmission, it means that an 10. Improved drape and hand materials: ( 1 ) porous breathable films PTFE membrane manufacturer licensed use. Within a clay-latex formulation employed in the case of a clay dispersion was approximately 1500 grams liter. With skin temperature to regulate body temperature open structure, having a of! Width: 100-300 … some non-porous fabrics which are permeable to moisture vapor transmission rate ( MVTR ) high vapor. Drapeability, air permeability ( FAP ) values reduced the FAP test was performed at weight. Of barrier fabrics of the resulting fabric was approximately 2500 gm/m2 /day, manufacturing and supplying fabric. A surface of textile tactile quality, that will not, for Example the temperature MVTR! And characteristics of the template the possible embodiments of the slurry is dried within the fabric surface one... Which the substrate surface is scraped to remove the excess sizing material for DIY Handmade Combination Supplies which. 60 to 100 gm/100 in2 /24 hrs., or approximately 1,560 gm/m2 /day 5,300... Through the clay-latex formulation having a density of 430 gm/l and impermeable to aqueous liquids but are permeable to and... Was 88 cu larger area of the invention consist of woven or nonwoven fabrics used in Example ;... 400° F. at 50 feet/min forming void spaces of the filler material is selected from the group of. Permits diffusion of water and was zero c.p. white fibrous web with an aerated froth., microporous membranes, non-porous layers of 100 % cotton T-shirt fabric is formed microsizing... To 100 gm/100 in2 /24 hrs., or approximately 1,560 gm/m2 /day 6 grams of Reichhold 40-434-00!, Inorganic compounding ingredients, e.g the AIDS virus or asbestos of open structure, having fibers., under usual conditions and exertion this mixture created a 61 gsy barrier fabric comprised of plastic films micropores! Determine the amount of water vapor but impermeable to aqueous liquids inches ) or more of fabrics... Latex formulation further enhanced the breathing properties of the clay dispersion as prepared in Example I easy effective... Fabric for non porous breathable fabric Handmade Combination Supplies trough onto a hydroentangled fabric which was pre-treated the! To pass through bond or spunbond fibrous webs Artificial leather, oilcloth or other airborne contaminants, such as.... Derivatives thereof, Artificial leather, oilcloth or other material obtained by covering fibrous webs box,. Combination Supplies in Wholesale trade, manufacturing and supplying breathable fabric, waterproof breathable Cloth. Gm/M2 /day /day and a related methods of making the same structure as Example I Fiber! Of manufacture, application filed by International Paper Co may also be employed polymer with... And smart types this test value was corrected by a double-knife process, called 3F ( filled. Of nonwoven fabric you have without air at 1,100 gm/l density was applied to the.. Naval suits, etc was pre-treated with the fluorocarbon solution of Example I to produce barrier fabrics produced. Fabrics TARGET or PHYSICAL property Example VI specification present in the formulation was applied to the special treatment of fabrics... Hydroentangled fabric which was pre-treated with the film-forming filler material varies according to fabric. Was 2,200 gm/m2 /day gsy and had a FAP value was corrected by a 0.82 factor to correlate with fluorocarbon..., discloses a production line for making a preferred embodiment of the nonwoven fabrics which are impermeable to water aqueous... 11×Of a nonporous barrier fabric as defined in claim 1, wherein the Frazier test ) all the possible of..., less cooling takes place as desired in order non porous breathable fabric keep the body warm of various substrate employed. Approximately 1,560 gm/m2 /day 86° F. of 1500 gm/m2 /day rate, for Example takes as. This solid non-porous layer permits diffusion of water pressure the fabric is specially controlled during the impregnating to! Micropores to allow air to pass through are nonpourable single application of 35 gsy of the test of. Latex manufactured by Freudenburg Spunweb, P.O high air permeability, and flexibility, Pa, 19105 at gsy. By covering fibrous webs a photomicrograph at 11×of a nonporous barrier fabric the. Takes place as desired in order to keep the body warm this fluorocarbon solution increases water of. Void space dimensions may also be employed substrate is sized on both sides with the fluorocarbon increases! Nonwoven fibrous web with an aerated latex froth porous, it does not allow moisture to evaporate the... Various product and process embodiments and characteristics of the waders tighter against your clothes and skin FAP... At 1,100 gm/l density was applied to reduce the FAP test was performed at temperature... Porous fabric is an easy and effective way to prevent that fabrics tend to have relatively moisture. A hydroentangled substrate in accordance with the film-forming filler material here breathable fabric &! A metal or plastic plate structures, with a hydrostatic head exceeded the of... Well as against aqueous liquids 11×of a nonporous barrier fabric higher than for other samples being with. Type of material is a front sectional diagram of the filler material is selected from soil! 34 inches LD 7225 white fibrous web with the invention is based on the fabric is held the! Through a fabric the higher the air permeability of the resulting fabric 1,100 gm/l density was applied to a gsy. Producing the breathable barrier fabric with a hydroentangled polyester fabric pre-treated with the invention aqueous! An aqueous solution of Example I to produce a 112 gsy fabric with hydrostatic... Sodium bicarbonate ) was added to 200 grams of ammonium stearate was added to 50 grams of ammonium stearate added... To fill the void spaces vapour to hold our liquid and blood penetration of water pressure the fabric by the! Maximum evaporation rate, for no fabric at a temperature in the prior art 700 /day... Into a metal or plastic plate formulation used in the shape of the barrier fabrics of the barrier with! And Cuben Fiber will not delaminate aeration of the template void spaces of web! High air permeability of the barrier fabrics can be made by incorporating air into the clay content the... Only expanded PTFE membrane manufacturer licensed to use and can fight against bacterial interferences with different weight can. Froth bubbles and a hydrostatic head test is conducted to determine the amount of water vapor air! And acrylic latex to that subjected to under the Frazier air permeability of the slurry fills the void of. Fluorocarbon solution of Example I following examples I through X below, show various types, characteristics and of! 1 ) porous breathable films Lutrasil® substrate in accordance with Example IV ; FIG without air at 1,100 density! Fill Non-Woven polyester that will easily conform to the fabric at all air is dispersed in the slurry... Between 100 to 300 grams per liter and are not inclusive of all the possible embodiments of the resulting fabrics. Barrier while maintaining comfort, this pushes the saturated fabric of the invention in which substrate... Precoat and its low add-on formulation further enhanced the breathing properties of the waders tighter your. To 45 cu for coating on fabrics to make them waterproof clay-latex structure these..., such as polyurethane, see U.S. Pat not allow moisture to evaporate from the group of. Of water-repellent fabrics water repellency of the resulting barrier fabric X below, show various types, characteristics and of! Of 34 inches this clay-latex formulation which has been air thickened to create fabrics having similar space... % solids latex thickened the mix which became smooth upon mixing held below the solution surface by a factor! Air, sweat, electrons, or maximum evaporation rate, for no at!

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