WO2001029299A2 - Tissus protecteurs enduits - Google Patents

Tissus protecteurs enduits Download PDF

Info

Publication number
WO2001029299A2
WO2001029299A2 PCT/US2000/028796 US0028796W WO0129299A2 WO 2001029299 A2 WO2001029299 A2 WO 2001029299A2 US 0028796 W US0028796 W US 0028796W WO 0129299 A2 WO0129299 A2 WO 0129299A2
Authority
WO
WIPO (PCT)
Prior art keywords
recited
fabric
article
liquid
coating layer
Prior art date
Application number
PCT/US2000/028796
Other languages
English (en)
Other versions
WO2001029299A3 (fr
Inventor
Charles A. Howland
Michael E. Fordham
Original Assignee
Warwick Mills, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Warwick Mills, Inc. filed Critical Warwick Mills, Inc.
Priority to AU80288/00A priority Critical patent/AU8028800A/en
Publication of WO2001029299A2 publication Critical patent/WO2001029299A2/fr
Publication of WO2001029299A3 publication Critical patent/WO2001029299A3/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B7/00—Footwear with health or hygienic arrangements
    • A43B7/32—Footwear with health or hygienic arrangements with shock-absorbing means
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D19/00—Gloves
    • A41D19/015—Protective gloves
    • A41D19/01505—Protective gloves resistant to mechanical aggressions, e.g. cutting. piercing
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/24—Resistant to mechanical stress, e.g. pierce-proof
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/026—Composites, e.g. carbon fibre or aramid fibre; the sole, one or more sole layers or sole part being made of a composite
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/12—Soles with several layers of different materials
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N3/042—Acrylic polymers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/08—Properties of the materials having optical properties
    • D06N2209/0807—Coloured
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/10—Properties of the materials having mechanical properties
    • D06N2209/103—Resistant to mechanical forces, e.g. shock, impact, puncture, flexion, shear, compression, tear
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/10—Properties of the materials having mechanical properties
    • D06N2209/105—Resistant to abrasion, scratch
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/12—Permeability or impermeability properties
    • D06N2209/121—Permeability to gases, adsorption
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/12—Permeability or impermeability properties
    • D06N2209/121—Permeability to gases, adsorption
    • D06N2209/123—Breathable
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/12—Permeability or impermeability properties
    • D06N2209/126—Permeability to liquids, absorption
    • D06N2209/128—Non-permeable
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2211/00—Specially adapted uses
    • D06N2211/10—Clothing
    • D06N2211/103—Gloves

Definitions

  • the invention relates to coated fabrics and methods for coating fabrics for improving their resistance to puncture and/or their resistance to cut and/or abrasion while substantially maintaining the hand and drapability of the fabrics.
  • Protective fabrics having high puncture, abrasion, and cut resistance have a wide range of industrial applications for the construction of protective armor and protective clothing for use in protecting against a wide variety of assaults.
  • Such protective clothing and armor often is utilized by police and prison guards, among others, and is designed to be capable of withstanding assault by a variety of instruments, such as bullets, knives, etc.
  • Typical prior art protective vestaments are often constructed of fabrics including various high performance fibers having high tensile breaking strengths, for example Kevlar ® .
  • prior art vestaments can be useful for preventing penetration of relatively large penetrators, for example those having a maximum cross sectional size greatly exceeding the diameter of the yarns comprising the fabrics in the protective vestaments, but are typically less effective at preventing penetration by small sharp penetrators, for example needles, ice picks, snake fangs, thorns, etc., having relatively small cross sectional diameters, for example, less than 0.1 inches.
  • typical prior art protective vestaments often are constructed from a large number of layers of protective fabric, and may also be laminated with layers of other penetration-resistant materials, for example ceramics disks, etc., in order to improve penetration resistance. Such constructions typically result in articles which are relatively stiff and not readily drapable. Accordingly, such articles are not ideally suited for use as articles of clothing where comfort and mobility of a wearer are important.
  • protective fabrics where comfort and mobility of a wearer are important, and where typical prior art protective articles are not ideally suited, include the use of protective fabrics for constructing gloves, and in the manufacture of rugged outerwear, for example, for use in hunting, hiking, fishing, extreme sports, and other outdoor activities.
  • Protective fabrics can also be useful in a number of safety related applications and be used in garments such as aprons, gauntlets, and boots. For such applications, providing cut, puncture, and abrasion resistance while at the same time maintaining a soft hand feel and drapability of the protective fabric can be critical for customer satisfaction and acceptance.
  • Coating protective protective fabrics to improve their resistance to penetration by sharp penetrators is described in U.S. Patents 5,565,264 and 5,837,623, both to Howland.
  • the '264 and '623 patents to Howland describe methods for weaving high cover fabrics from multifilament yarns comprised of performance fibers, and further describe coating these fabrics with a high-modulus epoxy resin to improve their penetration resistance.
  • the high-modulus epoxy resin used substantially stiffens and severely impairs the drapability of the base fabric, the resin is applied to the fabric in a discontinuous pattern leaving regions of the fabric uncoated in order to provide flexation points so that the fabric can be rendered bendable and drapable.
  • the current invention provides coated protective fabrics and methods for coating fabrics that can improve at least one of the puncture resistance, abrasion resistance, and durability of the fabric, while maintaining a relatively soft hand feel of the fabric and/or maintaining the drapability of the fabric to allow for mobility and comfort of a wearer.
  • a series of articles are disclosed.
  • the article in one embodiment comprises at least one layer of fabric and at least one coating layer including a polymeric material that is disposed on at least a portion of at least one surface of the fabric.
  • the polymeric material comprises an elastomeric material having a modulus of elasticity not exceeding about 500,000 psi and preferably not exceeding about 100,000 psi.
  • the coating layer further includes dispersed therein at least one abrasive particulate filler material.
  • the coating layer is disposed on the surface of the fabric such that at least a portion of the surface is conformally coated with the coating layer.
  • an article in another embodiment, comprises at least one layer of a fabric, where the fabric includes at least one performance fiber having a tensile breaking strength of at least 10 grams/denier (g/denier).
  • the coated fabric further comprises at least one coating layer including a polymeric material that is disposed on at least a portion of at least one surface of the fabric.
  • the polymeric material comprises an elastomeric material having a modulus of elasticity not exceeding about 500,000 psi and preferably not exceeding about 100,000 psi.
  • an article in another embodiment, comprises at least one layer of a woven fabric and at least one coating layer including a polymeric material that is disposed on at least a portion of at least one surface of the fabric.
  • the coating layer further includes dispersed therein at least one abrasive particulate filler material.
  • the coating layer is disposed on the surface of the fabric such that at least a portion of the surface is conformally coated with the coating layer.
  • an article in yet another embodiment, comprises at least one layer of a woven fabric and at least one coating layer including a polymeric material that is disposed on at least a portion of at least one surface of the fabric.
  • the polymeric material comprises an elastomeric material having a modulus of elasticity not exceeding about 500,000 psi and preferably not exceeding about 100,000 psi.
  • the coating layer further includes dispersed therein at least one abrasive particulate filler material.
  • an article is disclosed that comprises at least one layer of fabric including therein at least one performance fiber having a tensile breaking strength of at least about 10 g/denier.
  • the article further comprises at least one coating layer disposed on at least a portion of at least one surface of the fabric and comprising a barrier material that is permeable to a gas but essentially impermeable to liquid water.
  • a method is disclosed. The method involves dispersing at least one abrasive particulate filler in a liquid that is able to form a solid film on a surface, where the film includes a polymeric material.
  • the polymeric material has a modulus of elasticity not exceeding about 500,000 psi and preferably not exceeding about 100,000 psi.
  • the method further comprises applying the liquid onto a surface of the fabric, spreading the liquid across at least a portion of the fabric surface to form a liquid layer on the fabric surface that substantially conforms to a surface topology of the fabric, and allowing the liquid layer to solidify to form a conformal coating layer upon the fabric surface.
  • a method in another embodiment, involves supplying a liquid that is able to form a solid film on a surface, where the film includes a polymeric material that has a modulus of elasticity not exceeding about 500,000 psi and preferably not exceeding about 100,000 psi.
  • the method further comprises applying the liquid onto the surface of a fabric that includes at least one performance fiber having a tensile breaking strength of at least about 10 g/denier.
  • the method further comprises spreading the liquid across at least a portion of the fabric surface to form a liquid layer on the fabric surface and allowing the liquid layer to solidify to form a coating layer on the fabric surface.
  • a method comprises applying a film-forming liquid to a fabric surface and spreading the liquid across at least a portion of the surface by utilizing a spreading blade formed of a flexible elastomeric material, where, during the spreading step, the blade is maintained in essentially direct contact with the liquid on the fabric surface.
  • a method comprises combining at least one layer of fabric including therein at least one performance fiber having a tensile breaking strength of at least about 10 g/denier with at least one coating layer comprising a barrier material that is permeable to a gas but essentially impermeable to liquid water, so that the coating layer is disposed on at least a portion of at least one surface of the fabric.
  • FIG. 1 is a schematic illustration of a cross section of fabric showing an end-on view of three fill yams and further showing a non-conformal laminated coating layer;
  • FIG. 2 is a schematic illustration of a cross section of fabric showing an end-on view of three fill yams and further showing a non-conformal coating layer essentially completely filling the interstices between the warp yams;
  • FIG. 3 is a schematic illustration of a cross section of fabric showing an end-on view of three fill yams and further showing a conformal coating layer according to the invention of a polymeric material having an abrasive particulate filler disposed therein;
  • FIG. 4 is a flow chart illustrating steps of a fabric coating method according to some embodiments of the invention.
  • FIG. 5 is a schematic illustration of a knife over air process for forming a conformal coating on a fabric, according to one embodiment of the invention.
  • a protective fabric providing penetration and/or abrasion resistance is formed by coating a layer of a woven or non-woven fabric with at least one coating layer that includes a polymeric material.
  • the coating layers according to the invention are, in some embodiments, disposed on only one surface of the fabric; however, in alternative embodiments where stiffness and drapability of the fabric is less important, both sides of the fabrics may be coated with a coating layer.
  • the polymeric coating materials and the methods for coating the fabrics can allow for enhancing at least one of the penetration, cut, and/or abrasion resistance of the fabrics (hereinafter also collectively referred to simply as "penetration resistance") , while, preferably, at the same time maintaining a relatively soft hand feel and drapability of the fabric.
  • the coated fabrics provided according to certain embodiments of the invention can also, in some instances, provide improved dyability, printability, washability, and weather resistance to a base fabric upon which the coating is disposed.
  • the coating can be further selected so that the coated fabric also substantially retains its gas permeation characteristics and thus remains breathable to provide comfort for a wearer.
  • the inventive fabrics described herein have a wide variety of applications.
  • One particular use for the inventive fabrics is in the manufacture of protective vestaments and apparel, for example, in the manufacture of protective gloves and other articles of protective industrial or other clothing, such as aprons, chaps, gauntlets, gators, boots, etc., as well as in the manufacture of rugged outerwear for use as hunting apparel or apparel for other sporting applications.
  • the coated protective fabrics described herein can be used, especially where maximum flexibility and comfort is desired, as a single layer in the manufacture of apparel, or, alternatively, may be configured as multiple layers or laminated with other fabric layers or materials to provide additional protection or other desirable properties.
  • the inventive coated fabrics preferably include coating layers that include a polymeric material comprising one or more low modulus, relatively soft elastomeric materials.
  • a polymeric material comprising one or more low modulus, relatively soft elastomeric materials.
  • Utilization of such low modulus polymeric coating materials can enable the surface of the fabric to be coated with an essentially continuous layer of the low modulus polymeric material, while substantially maintaining flexibility of the fabric and not unduly increasing its stiffness or reducing its hand and drapability.
  • a wide variety of low modulus polymeric materials are potentially useful for forming the fabric coatings according to the invention.
  • Such polymeric materials can be natural or synthetic polymers and preferably comprise elastomeric materials having a modulus of elasticity not exceeding about 500,000 psi, more preferably not exceeding about 100,000 psi, more preferably not exceeding about 50,000 psi, more preferably not exceeding about 10,000 psi, and more preferably not exceeding 5,000 psi.
  • Modulus of elasticity as used herein in reference to the hardness of polymeric materials used for forming coating layers on fabrics refers to the modulus of elasticity of the polymeric material when in a substantially pure solid form, excluding other additives introduced into the material during the coating processes described in more detail below.
  • a coating layer may be applied to a surface of a fabric as a pre-formed solid film, for example, by lamination of the film to the surface of the fabric.
  • the coating layer is formed on the surface of the fabric by depositing a liquid that is able to form a solid film including a polymeric material on the fabric surface, spreading the film onto the surface of the fabric, and allowing the spread liquid layer to solidify to form the polymeric coating layer.
  • a "liquid that is able to form a solid film including a polymeric material” as used herein refers to any liquid that can be applied to and spread onto the surface of a fabric, which can subsequently be solidified to form a polymeric coating layer on the fabric surface.
  • Such liquids can comprise, for example, polymeric materials at a temperature above their glass transition temperature (i.e., hot melt polymers), polymeric emulsions, solutions, suspensions, mixtures of monomers or pre-polymers, or combinations of the above, or other liquids that are able to solidify upon a surface to form a coating layer.
  • Such solidification may occur, for examples, by cooling below a glass transition temperature, polymerization, crosslinking, evaporation of a solvent, etc., or combinations thereof.
  • a wide variety of known polymeric materials can potentially be utilized for forming the inventive fabric coatings and can include, for example, various rubber compositions, such as curable rubbers and silicone rubbers, poly vinyl chloride compositions, polyurethanes, such as poly ether urethane, acrylic latex polymers, and other low-modulus polymers known in the polymer arts. Hetrofore, such soft resin, low-modulus coating materials were not typically employed in the protective fabric arts.
  • Some preferred coatings according to the invention utilize polyurethanes or acrylic latex polymers, and in some especially preferred embodiments, the coatings are formed of an acrylic latex polymer.
  • Formulations of the above mentioned polymers capable of forming coatings are known in the polymer and coating arts and many are commercially available.
  • Polymers, such as the above-mentioned polyurethanes and acrylic latex polymers, that are able to form a coating of a barrier material that is permeable to gases, such as air and water vapor, but essentially impermeable to liquids, such as water, are especially preferred.
  • barrier material coatings enable the coated fabrics to be rendered water resistant or essentially "water proof,” while allowing good breathability via the permeation of air through the material and/or the escape of water vapor from a wearer via evaporation from the body and permeation through the coated layer of barrier material.
  • acrylic latex emulsions are utilized for forming the inventive polymeric fabric coatings.
  • acrylic latex emulsions are available, for example, from BF Goodrich ® Specialty Chemicals (Lawrence, MA) in a variety of formulations, for example Sancure ® 861, Hycar ® 2679, and Sancure ® 13077, and others.
  • Coatings formed from the above mentioned acrylic latex emulsions have been found to enable substantial maintenance of the hand and drapability of the fabric while providing increased yam stability within the fabric, good breathability, high wash resistance and resistance to hydrolysis, and improved dyability and printability of the coated fabric.
  • inventive coated fabrics for examples, by dying, printing, and/or addition of colored pigments to the coatings can provide an important commercial advantage to the inventive protective fabrics when compared to typical prior art fabrics.
  • This advantage is especially important for embodiments involving fabrics comprised of performance fibers such as, for example, para-aramids such as Kevlar ® , which are not easily colorable by typical prior art techniques.
  • various additives may be dispersed into the liquid used for forming a coating layer on the fabric (e.g., an acrylic latex emulsion) for various purposes including improving the film-forming characteristics of the liquid, increasing the puncture and/or abrasion resistance of the coating, coloring the coating, etc.
  • a quantity of a granular abrasive particulate filler material is dispersed in the liquid used for coating the fabric.
  • abrasive particulate filler materials are useful for increasing at least one of the puncture, cut, and abrasion resistance of the coated fabric, by, in part, providing a high level of frictional resistance to an object penetrating the fabric.
  • the particular fillers preferred for use in the current invention as well as their preferred characteristics are discussed in greater detail below in the context of the preferred methods for coating fabrics according to the invention.
  • inventive fabric coatings and coating methods described herein can be utilized to improve the protective properties of a wide variety of woven and non- woven fabrics formed of a wide variety of natural and/or synthetic fibers, such as, for example, polyester, nylon, polypropylene, and cotton fibers.
  • any woven fabric can potentially be utilized as the base fabric used for forming coated protective fabrics according to the invention.
  • the base fabrics utilized include at least one performance fiber as part of the fabric structure.
  • a "performance fiber” as used herein refers to a fiber that has a tensile breaking strength of at least 10 g/denier, and more typically at least 15 g/denier.
  • the woven fabric is essentially completely comprised of yams that are formed form a plurality of such performance fibers.
  • Some performance fibers are well known in the protective fabric arts and include fibers formed of para-aramids (e.g., Kevlar ® , Twaron ® , and Technora ® ), liquid crystal polyesters (e.g., Vectran ® ), ultra-high molecular weight polyethylenes (e.g., Spectra ® ), and poly(p-phenylene-2,6-benzobisoxazole) (PBO) (e.g. Zylon ® ).
  • para-aramids e.g., Kevlar ® , Twaron ® , and Technora ®
  • liquid crystal polyesters e.g., Vectran ®
  • ultra-high molecular weight polyethylenes e.g., Spectra ®
  • PBO poly(p-phenylene-2,6-benzobisoxazole
  • the base fabrics comprise a high yam density, high cover, tightly-woven fabric.
  • such high cover fabrics comprise the Kevlar ® fabrics described in commonly owned U.S. Patents 5,565,264 and 5,837,623 both incorporated herein by reference in their entireties. The reader is referred to the above mentioned patents for greater detail concerning the performance base fabrics briefly described immediately below. As described in the above referred to patents, such densely woven fabrics inherently can provide a high degree of protection and inherently can have a high degree of resistance to puncture.
  • Such fabrics typically have a warp yam density ranging from at least about 90 warp yams/inch of fabric to at least about 130 wa ⁇ yams/inch of fabric, and have a fill yam density of at least about 65 fill yams/inch of fabric to about 90 fill yams/inch of fabric.
  • the fabrics above typically are constructed either as 200 x 200 denier or 200 x 400 denier (wa ⁇ yam denier x fill yam denier).
  • the yams in the above mentioned fabrics can be formed from continuous filament fibers or from twisted shorter length staple fibers.
  • the above mentioned fabrics can provide a wa ⁇ yam cover factor of at least 100% and up to about 140%, at the center of the fill yarn, for some embodiments, and can provide a fill yarn cover factor of at lest about 75%, as measured between two wa ⁇ ends.
  • One preferred woven fabric, described in the above- mentioned patents, for use in the current invention, is formed of wa ⁇ yarns and fill yams formed of 100% Kevlar ® 1.5 inch staple filaments spun into Kevlar ® yarns.
  • This preferred fabric has a construction utilizing 200 denier multifilament wa ⁇ yams (50/2 cotton count) and 400 denier multifilament fill yams (25/2 cotton count) at a weaving density of about 110 wa ⁇ yarns/inch by about 67 fill yams/inch.
  • This fabric provides a wa ⁇ yarn cover factor of between about 130 and 140%) and a fill yam cover factor of about 85%.
  • wa ⁇ yam “cover factor” refers to a measure of the amount of overlap between adjacent wa ⁇ yams as measured at the fill crossing and can be determined as the sum of each of the widths of the wa ⁇ yarns in a given cross section divided by the total length of the cross section.
  • the coated fabrics provided according to the invention preferably include a coating layer that is disposed on a surface of the fabric such that at least a portion of the surface is conformally coated with the coating layer.
  • a “conformal” coating layer or a surface that is “conformally coated” with a coating layer refers to a coating layer that is disposed on a surface of a fabric such that the layer is essentially continuous and uninterrupted on a least a portion of the surface and has a shape which substantially conforms to the surface topology and contour of the fabric surface, while not completely penetrating or soaking through the cross sectional thickness of the fabric.
  • FIGs. 1-3 show examples of non-conformal coatings (FIGs. 1 and 2) and conformal coatings (FIG. 3) as provided according to the invention.
  • FIG. 1 shows a coated fabric 100 having a non-conformal coating layer 102 disposed on an upper surface of fabric 104.
  • Fabric 104 is comprised of a plurality of multifilament yarns including wa ⁇ yarns 108 and fill yams 110. The structure of the yarns is more clearly seen by considering fill yams 110 shown in cross section.
  • Fill yarns 110 are formed of a plurality of individual filaments or fibers 112. As described above, in preferred embodiments, the yarns are preferably formed of fibers (such as 112) which are high performance fibers, for example, Kevlar fibers.
  • Non-conformal coating layer 102 does not conform to the topological shape of fabric surface 114, but instead simply rests upon the surface and is in contact with fabric 104 only at the high points 116 of wa ⁇ yarns 108. Specifically, coating layer 102 does not conform with and is not in contact with fabric 104 in valley regions 118. Coating layer 102 is typical of a layer deposited by layering, lamination, or bonding of a pre-formed polymeric film to a fabric surface. Coatings such as 102 are less preferred than conformal coatings in the context of the present invention because they are not as effective at stabilizing the movement of the yarns comprising the base fabric upon exposure to a penetration or cutting threat. FIG.
  • Coating 152 is typical of coatings that are formed by applying, and essentially completely saturating, a fabric with a liquid coating solution that subsequently solidifies to form a coating such as 152.
  • coating layer 152 is typically scraped off the fabric at high points 116 of wa ⁇ yam 108 so that the coating is non- continuous on the fabric surface.
  • coating layer 152 does not have a shape that conforms to the surface topology of fabric 154.
  • coating 152 is discontinuous at the high points 116 of fabric 154 and completely fills up valleys 118 defined by wa ⁇ yams 108.
  • Such a coating is typically less desirable than the conformal coatings described below for coated fabrics provided according to the invention for at least two reasons.
  • coating 152 leaves a considerable surface area of the coated fabric (i.e., the areas defined by high points 116) which are largely unprotected and do not fully benefit from the protective properties of the coating layer.
  • FIG. 3 illustrates a coated fabric 200 produced according to a preferred embodiment of the invention.
  • Coated fabric 200 includes a conformal coating layer 202 disposed, in the illustrated embodiment, on one surface 203 of fabric 204.
  • conformal coating 202 is essentially continuous across the surface of fabric 204, even at high points 116 of wa ⁇ yarns 108.
  • conformal coating layer 202 has a shape and contour which substantially conforms to the surface topology of fabric 204.
  • Conformal coating layer 202 preferably conforms to and adheres to the surface of wa ⁇ yams 108 within valley regions 118, but, unlike coating 152 shown in FIG. 2 above, conformal coating layer 202 preferably does not completely fill up the void space defined by valleys 118. In especially preferred embodiments, conformal coating 202 is applied to fabric 204 so that it has a substantial uniform thickness across the fabric surface that is coated. Conformal coating 202 also, as shown in FIG. 3, preferably does not penetrate through or saturate the entire cross section of fabric 204.
  • conformal coating layer 202 is able to provide an essentially continuous and uninterrupted layer of protection to the fabric surface, which can improve the puncture, cut, and abrasion resistance of the base fabric, in part, by densifying and immobilizing the fibers and yams at the crossing points in the weave of the fabric.
  • conformal coating layer 202 does not completely fill the interstices of the cross sectional thickness of fabric 204, it has a reduced tendency to increase the stiffness of fabric 204, and can allow coated fabric 200 to retain a substantial degree of the drapability and hand of the base, uncoated fabric.
  • conformal coating layer 202 can be formed by applying a layer of a liquid coating solution, suspension, emulsion, molten polymer, etc., which is able to form a solid polymeric film, onto the fabric surface and spreading the liquid onto the surface using a novel spreading technique, described in more detail below.
  • coating layer 202 could be formed by applying a preformed solid polymeric film to the fabric surface, conforming the film to the topology of the fabric surface (for example by using an applied pressure or vacuum) and a bonding/laminating the film to the fabric surface.
  • Coating layer 202 of coated fabric 200 also preferably includes a plurality of grains of abrasive particulate filler material dispersed within the coating layer.
  • coating layer 202 may also include other additives, for example dyes or color pigments to impart a color to the coated surface of coated fabric 200.
  • abrasive particulate filler materials can improve the abrasion resistance and puncture resistance of coated fabric 200 and can also, in certain embodiments, enhance the film-forming properties of a liquid coating solution used for forming coating layer 202.
  • coating layer 202 is formed utilizing acrylic latex emulsions
  • the inventors have found that the addition of particulate carbon black to the acrylic emulsion not only can improve the abrasion and puncture resistance of the resulting acrylic polymer film, but also tends to improve the coating properties of the acrylic latex and also provides pigmentation (i.e., a black color) to coated fabric 200.
  • certain preferred embodiments of coating layer 202 also include dispersed therein a plurality of grains of one or more inorganic high-hardness, high-friction materials.
  • Such materials are especially beneficial for applications where a high degree of abrasion and/or puncture resistance is desired, since such materials, owing to their hardness and typically jagged and rough shape, can greatly increase the frictional resistance - 13 - to passage of a penetrator, such as a needle or thom, through the coated fabric.
  • a wide variety of particulate fillers can be utilized according to the invention.
  • Such materials are known in the abrasives and grinding arts and include, for example, ceramic materials such as silicon carbide, aluminum oxide, silicon dioxide, sapphire, garnet, etc.
  • industrial diamond abrasives may also be used as abrasive particulate filler material according to the invention.
  • Preferred particle sizes for the inorganic high-hardness, high-friction materials/industrial diamond materials fall within the range of mesh sizes (roughly equivalent to the number of particles that can be aligned end to end per linear inch) of between about 80 mesh and about 6400 mesh, with mesh sizes of between about 200 to 300 being especially preferred.
  • Coated fabric 200 also includes a layer of polymeric material 208 bonded to the surfaces of wa ⁇ yarns 108 and fill yams 110, which serves to stabilize the yarns of fabric 204 to increase their resistance to a penetrating, abrading, or cutting force.
  • interstitial coating 208 can be formed by allowing a polymer-containing or polymer- forming liquid to wick into and substantially penetrate a cross section of fabric 204, without completely saturating the interstices of fabric 204, and subsequently allowing the liquid to solidify thereby depositing a polymer within the structure of fabric 204.
  • Such a technique is referred to herein as a "semi-saturation coating,” and such coatings can enhance the penetration resistance of the coated fabric without unduly compromising the hand and drapability of the fabric, as contrasted with coatings which completely saturate the fabric, such as those shown previously in FIG. 2.
  • Described in detail below is one preferred method for forming the inventive coated protective fabrics as described above, and shown, for example, in FIG. 3. While it should be emphasized that a wide variety of polymeric coating materials may be utilized according to the invention, including a wide variety of materials that enable the formation of a polymeric coating layer by applying a liquid that is able to form a solid polymeric film to a surface, in the description below, an exemplary embodiment utilizing coatings formed from water-based acrylic latex emulsions is described in order to outline and highlight important features and steps of coating methods useful for forming coated fabrics according to the invention.
  • the particular choice of materials and conditions for forming the inventive coated fabrics will depend, in large degree, on the desired final properties of the coated fabric being produced. Specifically, conditions and materials which tend to increase puncture resistance also, in many instances, also tend to increase the stiffness of the coated fabric. Therefore, the conditions and materials selected will depend upon a particular degree of puncture resistance, drapability, and hand required or desired of a coated fabric for a particular application. Accordingly, it is not possible to generalize or provide comprehensive listing of conditions and materials to form the entire range of coated fabrics falling within the scope of the present invention.
  • optimal conditions for producing a particular desired set of properties for a coated fabric are selected via routine experimentation and optimization involving, for example, the above mentioned parameters.
  • Fabrics produced according to various conditions can be subjected to a variety of screening tests to determine their properties and assist in determining appropriate coating conditions for a particular application.
  • screening tests include the general hand and feel of the fabric, microscopic analysis (e.g., transmission electron microscopy and/or scanning electron microscopy) of the coated fabrics to observe the topology of the coating layers, and a variety of ASTM tests for determining the circular bending resistance and needle penetration resistance of the fabric, and cut and abrasion resistance of the fabric for example ASTM D4032 and ASTM F1342, ASTM SI 790, and ASTM D3884 tests respectively.
  • the flow diagram of FIG. 4 illustrates the basic steps for forming certain embodiments of coated protective fabrics according to the invention.
  • the method according to FIG. 4 will be described via an illustrative embodiment.
  • the embodiment illustrated involves forming at least one conformal coating layer by using an acrylic latex emulsion on a woven base fabric.
  • the conditions described below were selected to yield a coated fabric having a puncture resistance increased, as compared to the uncoated base fabric, by up to about a factor of two, for a single layer of fabric, as measured by a needle penetration test, while having a stiffness, as measured by ASTM D4032 circular bending test for a single layer of coated fabric, increased over the base fabric by less than about a factor of two.
  • the overall method comprises an optional semi-saturation coating step (step 1) for forming a thin, stabilizing polymeric coating layer within the structure of the fabric (for example, see coating layer 208 in FIG. 3 above). This is followed (in step 2) by the formation of one or more conformal coating layers on a surface(s) of the fabric (for example coating layer 202 shown above in FIG. 3) which, in some embodiments, may be followed with an optional step 3 for forming an abrasive-free top coating on the coated fabric.
  • step 1 for forming a thin, stabilizing polymeric coating layer within the structure of the fabric (for example, see coating layer 208 in FIG. 3 above).
  • step 2 by the formation of one or more conformal coating layers on a surface(s) of the fabric (for example coating layer 202 shown above in FIG. 3) which, in some embodiments, may be followed with an optional step 3 for forming an abrasive-free top coating on the coated fabric.
  • FIG. 5 illustrates a knife over air coating machine 300 wherein fabric 302 is fed under tension over tensioning rollers 304 and 306 in the direction of arrow 308.
  • a dispenser 310 Displaced above fabric 302 is a dispenser 310 configured to dispense a coating liquid (e.g., for the illustrated embodiment an acrylic latex emulsion-based coating liquid) at a controllable rate onto the fabric surface.
  • a coating liquid e.g., for the illustrated embodiment an acrylic latex emulsion-based coating liquid
  • a spreading element 312 including a blade 314 in contact with the surface of fabric 302, which serves to essentially uniformly distribute coating liquid 316 onto the fabric surface to form a coated surface 318.
  • a semi-saturation coating is applied to the base fabric.
  • the acrylic latex emulsions utilized for the various coating methods outlined in FIG. 4 are typically supplied from the manufacturer in a water base containing about 30 to about 40% acrylic latex solids. Such emulsion is hereinafter referred to as a “base emulsion” or “base solution”.
  • base emulsion or “base solution”.
  • various additives and modifiers may be added to the base emulsion in varying amounts to form what is hereinafter referred to as the "coating liquid”.
  • the coating liquid utilized for the semi-saturation coating step may include a low concentration of carbon black (e.g., less than or equal to about 10% wt.
  • the coating liquid used for the semi-saturation coating step be applied to the fabric surface so that it is able to wick into the fabric structure by capillary action without completely saturating the interstices of the fabric stmcture. This can be accomplished by adjusting the viscosity of the coating to have a slurry-like consistency so that the liquid is able to wick into the base fabric without rapidly saturating it. If necessary, the viscosity of the coating liquid can be adjusted via adding an appropriate viscosity modifying agent to the emulsion.
  • viscosity modifying agents can be used for this pu ⁇ ose, as apparent to those of ordinary skill in the art, for example fumed silica.
  • the optimal viscosity of the semi-saturation coating liquid will, of course, depend upon the particular properties of the base emulsion, added fillers, and base fabric and must be determined for each application via routine experimentation and optimization.
  • an appropriate viscosity for the semi-saturation coating liquid is such that when applied to fabric 302, the coating liquid has a viscosity such that it does not immediately penetrate into fabric 302 and also so that it has poor bank-forming characteristics (i.e. the tendency to form a ridge of piled-up coating liquid) in front of blade 314.
  • the degree of saturation will also be affected by total amount of the coating liquid deposited upon the fabric surface.
  • the amount of semi-saturation coating liquid deposited per coating set will range from about 0.1 oz. of coating liquid/square yard of fabric to about 3 oz. of coating liquid/square yard of fabric.
  • Spreading blade 314 utilized for spreading semi-saturation coating liquid can comprise, for example, a steel blade or a Myer rod spreader commonly utilized in the fabric coating arts, or, alternatively, can comprise a flexible elastomeric spreading blade, as described in more detail below in the context of steps 2 and 3 of FIG. 4.
  • an additional semi-saturation coating layer may be applied to the fabric by repeating optional step 1.
  • two semi-saturation coating steps are performed on the fabric so that a semi-saturation coat is applied to each side of the base fabric.
  • Step 2 illustrated in FIG. 4 involves the formation of a conformal coating on a surface of the woven fabric.
  • the coating liquid used in step 2 for forming the conformal coating layer includes the base acrylic latex emulsion, and further includes, in preferred embodiments, both carbon black and an additional abrasive particulate filler, for example, silicon carbide, each preferably present in an amount of between about 5 % wt. and about 40 % wt. in the coating liquid for a total abrasive particulate filler concentration of between about 10%) wt. and about 40% wt. in the coating liquid.
  • the conformal coating liquid may, if required, also contain a sufficient amount of a viscosity modifier, for example fumed silica, in order to provide the conformal coating liquid with a paste-like viscosity sufficient to prevent substantial penetration or wicking of the coating liquid into the fiber structure upon coating.
  • a viscosity modifier for example fumed silica
  • the conformal coating liquid in step 2 is applied to the surface of fabric 302 in a similar fashion as described above, and at a coating density of preferably between about 0.1 and about 3 oz/square yard of fabric also as described above.
  • the coating should be formed of a polymer material able to form such a barrier material when in the form of a conformal coating layer, for example polyurethanes and acrylic latex polymers, and is preferably applied to the surface of the fabric at a coating density of less than about 1 oz/square yard and more preferably less than about 0.25 oz/square yard.
  • the coating liquid used for conformal coating in step 2 because of its paste-like viscosity, will have less of a tendency to wick into the fabric and will tend to pile up at spreading blade 314 forming a bank of the coating liquid, as illustrated by coating liquid bank 316.
  • the inventors when forming the conformal coating, the inventors have discovered that the uniformity of the thickness of the coating and the conformity of the contour of the coating to the topology of the fabric surface can be substantially improved, in many instances, by spreading the coating liquid with a spreading blade 314 formed of a flexible elastomeric material, for example rubber, that is maintained in essentially direct contact with the coating liquid covering the fabric surface during the spreading step.
  • Direct contact refers to the blade being separated from the surface of the fabric by only the coating liquid and any previously deposited polymeric coating layers on the fabric surface and not by any screens or other such layers inte ⁇ osed between the fabric and the blade.
  • the inventors have found that such a spreading blade enables the formation of relatively thin uniform conformal coating layers that are essentially continuous over the surface of the fabric and that do not have regions that are scraped off of the fabric at the high points of the wa ⁇ yams, as shown above in Fig. 2, as typically occurs when using a steel bladed spreader or a Myer rod spreader as taught by the prior art.
  • step 2 may be repeated to provide additional conformal coating layers on the fabric if desired.
  • an additional coating layer(s) may be applied to the coated fabric on top of the conformal coating layer(s) produced from step 2 in order to provide an abrasive-free top-coating layer to the coated fabric.
  • a top-coating is useful for providing a clear or colored layer to the fabric that has a smoother hand feel and, in some embodiments, such a top-coat layer(s) can also improve the washability and/or dyability of the coated fabric.
  • this top- coating layer can be utilized to improve the grip characteristics of the coating and to improve the tactility of the gloves made from the fabric.
  • the material used for forming the top-coating layer(s) is preferably a material with a modulus of elasticity no greater than that of the material forming the conformal layer(s) applied as described above in step 2 and having a high coefficient of friction.
  • Step 3 can be performed in an essentially identical fashion as step 2 described above except that the coating liquid utilized in step 3 preferably does not contain any abrasive particulate fillers.
  • the viscosity of the coating liquid used in step 3 need not be as high as for the coating liquid in step 2 to prevent wicking into the fabric, since wicking will inherently be prevented by the presence of the coating layer(s) applied in step 2.
  • the coating liquid used in step 3 can have a lower viscosity similar to that of the coating liquids used above for optional semi-saturation coating step 1.
  • optional step 3 may be repeated to provide additional top-coat layers if desired.
  • a small amount of a cross-linking agent can be added to the coating liquids in any or all of the above described steps in order to increase the cross linking of the coating layer(s), for example to improve hydrolysis and/or abrasion/puncture resistance of the coating.
  • a variety of cross linking agents may be utilized depending upon the particular coating materials used. For example, when utilizing an acrylic latex emulsion based coating liquids, melamine, preferably in an amount of up to about 3 weight percent based on the total weight of the coating liquid, can be utilized to increase the degree of cross linking of the acrylic polymeric coatings.
  • coated fabrics produced according to the invention can be used for a wide variety of applications requiring protection against penetration of sha ⁇ objects while, at the same time, requiring drapability, flexibility, and breathability of the material.
  • drapability flexibility
  • breathability of the material.
  • a conformally coated protective fabric was formed according to the method outlined in Fig. 4.
  • the base fabric utilized for coating was a 100% Kevlar ® high-cover woven fabric having a weave constmction of 110 x 67 (wa ⁇ x fill) yams per inch of fabric of 200 x 400 denier (wa ⁇ x fill) yam construction, wherein the yarns were comprised of spun 1.5" staple Kevlar ® filaments.
  • the wa ⁇ cover factor of the fabric was about 130% to about 140% and the fill cover factor was about 85%.
  • One side of the base fabric was coated with two high-abrasive conformal coating layers, as described above in step 2 of Fig.
  • BF Goodrich ® Sancure 861 acrylic emulsion which forms an acrylic latex polymer having a modulus of elasticity of about 650 psi, was utilized as a base acrylic latex emulsion.
  • the coating liquid comprised: about 77.7% wt. Sancure 861 ; about 5.8% wt. carbon black (Monarch 280, Cabot, Tuskaloosa, AL, average particle size of about 45nm ); about 13.6% wt. of granular silicon carbide (about 220 mesh size); and about 2.9% wt. melamine (Aerotex M3, Cytec, West Patterson, NJ).
  • the above coating liquid was applied to the surface of the fabric in an amount of about 0.5 oz./per square yard of fabric for each layer of coating.
  • a coating liquid was utilized comprising about 100% wt. of BF Goodrich ® Hycar 2679 acrylic emulsion.
  • the coating liquid was applied, for each coat, in an amount of about 0.5 oz./square yard of fabric.
  • the samples were tested for stiffness using ASTM D4032 circular bending test. The test was performed both with the force applied to the coated surface (Face up) and with the force applied to the non-coated surface (Face down). The results, shown in Table 1 , indicate that the maximum load measured in the circular bending test, which is proportional to stiffness, was increased over that measured for the base fiber alone by only about a factor of 1.1.
  • Example 2 The coated fabric prepared according to the present example was coated with two conformal high-abrasive coating layers followed by two no-abrasive top-coating layers in a similar fashion as described above in example 1, and was, in addition, subjected to two semi- saturation coating steps prior to formation of the conformal coating, as described in optional step 1 of Fig. 4 above, so that one semi-saturation coating was applied to each side of the base fabric prior to conformal coating.
  • the semi-saturation coating liquid utilized for each of the semi saturation coating applications comprised: about 97.6% wt. of the Hycar 2679 acrylic latex emulsion in combination with about 2.4% wt. of the Monarch 280 carbon black Each of the semi- saturation coatings were applied to the fabric in an amount of about 0.5 oz./square yard of fabric.
  • the coating liquid comprised: about 80% wt. Hycar 2679 acrylic latex emulsion; about 6% wt. Monarch 280 carbon black; and about 14% wt. of granular silicon carbide (about 220 mesh size); for each of the high- abrasive coating layers.
  • the above coating liquid was applied to the surface of the fabric in an amount of about 0.5 oz./per square yard of fabric for each layer of coating.
  • a coating liquid was utilized comprising about 100% wt. of the Hycar 2679 acrylic emulsion.
  • the coating liquid was applied, for each coat, in an amount of about 0.5 oz./square yard of fabric.
  • the resistance to circular bending load was increased over the base fiber by a factor of about 1.4 (Face up) to about 1.7.
  • penetration resistance of the fabric was also determined. Penetration resistance was measured using the modified needle puncture test similar to ASTM F 1342, except that the puncture death was controlled to 30/1000" through the fabric.
  • the resistance to puncture with a 0.05 inch diameter needle was about twice that of the base fabric and with the 0.042 inch diameter needle was about 1.14 times that of the base fabric.
  • the cut resistance of a single layer of the coated fabric (row 2) was increased over the base fabric by about a factor of about 2.3.
  • Table 2 also illustrates the effect of layering the coated fabric on cut and puncture resistance.
  • Row three of Table 2 presents results obtained for cut and penetration resistance for a two layer stack of the coated fabric as measured by ASTM S 1790 and ASTM F 1342 test respectively. The results indicated that the cut resistance of the two layer stack was increased over that of the single coated fabric layer by about a factor of 2.14, and the puncture resistance of the two layer stack was increased over that of the single coated fabric layer by about a factor of 2.31.
  • Example 3 The coated fabric of example 3 was prepared substantially as described in example 2 above except utilizing coating liquids for the two semi-saturation coating applications, the two high-abrasive conformal coating layers, and the two no-abrasive top coat layers having the following compositions.
  • the semi-saturation coating liquid utilized for each of the semi saturation coating applications comprised: about 98.3% wt. of the Hycar 2679 acrylic latex emulsion in combination with about 1.7% wt. of the Monarch 280 carbon black Each of the semi- saturation coatings were applied to the fabric in an amount of about 0.5 oz./square yard of fabric.
  • the coating liquid comprised: about 78.4%) wt. Sancure 13077 acrylic latex emulsion, which forms an acrylic latex polymer having a modulus of elasticity of about 1710 psi; about 5.9%) wt. Monarch 280 carbon black; about 13.7% wt. of granular silicon carbide (about 220 mesh size); and about 2.0%) wt. melamine for each of the high-abrasive coating layers.
  • the above coating liquid was applied to the surface of the fabric in an amount of about 0.5 oz./per square yard of fabric for each layer of coating.
  • a coating liquid was utilized comprising about 100% wt. of the Hycar 2679 acrylic emulsion. The coating liquid was applied, for each coat, in an amount of about 0.5 oz./square yard of fabric.
  • the coated fabric produced according to the present example had a stiffness, as measured by the circular bending test, of about 1.8 (Face up) to about 1.9 (Face down) times that of the base, uncoated fabric.
  • a conformally coated protective fabric was formed according to the method outlined in Fig. 4.
  • the base fabric utilized for coating was a 100% polyester woven fabric having a weave construction of 129 x 70 (wa ⁇ x fill) yarns per inch of fabric of 220 x 220 denier (wa ⁇ x fill) yam construction, wherein the yams were comprised of spun 1.5" staple polyester filaments.
  • the wa ⁇ cover factor of the fabric was about 76% and the fill cover factor was about 83%.
  • the coated fabric prepared according to the present example was coated, on one side, with two abrasive conformal coating layers, and was, in addition, subjected to two semi- saturation coating steps prior to formation of the conformal coating, as described in optional step 1 of Fig. 4 above, so that one semi-saturation coating was applied to each side of the base fabric prior to conformal coating.
  • the semi-saturation coating liquid utilized for each of the semi saturation coating applications comprised: about 97.6% wt. of the Hycar 2679 acrylic latex emulsion in combination with about 2.4% wt. of the Monarch 280 carbon black
  • Each of the semi- saturation coatings were applied to the fabric in an amount of about 0.5 oz./square yard of fabric.
  • the coating liquid comprised: about 77.7% wt. Sancure 861; about 19.4% wt. carbon black (Monarch 280, Cabot, Tuskaloosa, AL, average particle size of about 45 n ); and about 2.9% wt. melamine (Aerotex M3, Cytec, West Patterson, NJ).
  • the above coating liquid was applied to the surface of the fabric in an amount of about 0.5 oz./per square yard of fabric for each layer of coating.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Inorganic Chemistry (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Laminated Bodies (AREA)
  • Woven Fabrics (AREA)

Abstract

La présente invention concerne des tissus protecteurs enduits ainsi que des procédés d'enduction de tissus qui peuvent améliorer les résistances au percement, à la coupe, à l'abrasion et/ou la durabilité du tissu, tout en lui conservant un toucher relativement souple et/ou une aptitude à la mise en forme et une perméabilité à l'air pour le confort et l'aisance de déplacement d'un porteur. Les enduits et les procédés d'enduction de l'invention peuvent être appliqués, aux fins d'amélioration de performances, à une grande variété de tissus tels que des tissus haute protection, à tissage serré et des tissus constitués de fibres de ténacité élevée, par exemple de fibres dont la force de rupture à la traction est supérieure à environ 10-15 g/denier. Certains des enduits de l'invention sont formés de matériaux polymériques possédant un niveau relativement faible de dureté, par exemple dont le module d'élasticité est inférieur à environ 100,000 psi. D'autres enduits de l'invention contiennent aussi, dispersés, un ou plusieurs matériaux abrasifs sous formes de particules, destinés à améliorer le niveau de résistance à la coupe et/ou au percement de l'enduit. L'invention concerne plusieurs configurations d'enduction, y comprises des couches d'enduction appliquées à la surface d'un tissu de façon à former un couche d'enduction conforme qui recouvre, essentiellement de manière continue, au moins une partie de la surface du tissu et qui se conforme sensiblement à la topologie de la surface du tissu. Les tissus protecteurs enduits de l'invention peuvent être utilisés afin de former une variété de vêtements et de produits utiles tels que des vêtements d'extérieur et de sports robustes, des vêtements et/ou équipements de sécurité et de protection pour l'industrie, des vêtements et/ou des équipements de protection destinés aux usages de forces de l'ordre et/ou de militaires, etc..
PCT/US2000/028796 1999-10-18 2000-10-18 Tissus protecteurs enduits WO2001029299A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU80288/00A AU8028800A (en) 1999-10-18 2000-10-18 Coated protective fabrics

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US16029099P 1999-10-18 1999-10-18
US60/160,290 1999-10-18

Publications (2)

Publication Number Publication Date
WO2001029299A2 true WO2001029299A2 (fr) 2001-04-26
WO2001029299A3 WO2001029299A3 (fr) 2002-01-03

Family

ID=22576285

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/028796 WO2001029299A2 (fr) 1999-10-18 2000-10-18 Tissus protecteurs enduits

Country Status (2)

Country Link
AU (1) AU8028800A (fr)
WO (1) WO2001029299A2 (fr)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002018126A2 (fr) * 2000-08-30 2002-03-07 Warwick Mills, Inc. Systèmes textiles multicouches laminés
EP1199400A2 (fr) * 2000-10-20 2002-04-24 ROTTA GmbH Composition de revêtement aqueuse contenant de polyuréthane pour matériau textile
US6543055B2 (en) 1998-10-26 2003-04-08 Warwick Mills, Inc. Penetration resistant garment
US6548430B1 (en) 1994-08-29 2003-04-15 Warwick Mills, Inc. Protective fabric having high penetration resistance
WO2003057462A1 (fr) * 2001-12-31 2003-07-17 Higher Dimension Medical, Inc. Tissu resistant a la penetration pourvu d'ensembles de plaques de protection a multiples couches et procede de fabrication
US6668868B2 (en) 2000-08-30 2003-12-30 Warwick Mills, Inc Woven fabric constructions having high cover factors and fill yarns with a weight per unit length less than the weight per unit length of warp yarns of the fabric
US6693052B2 (en) 1996-10-15 2004-02-17 Warwick Mills, Inc. Garment including protective fabric
WO2007148365A1 (fr) * 2006-06-21 2007-12-27 Tessiltoschi Industrie Tessili S.P.A. Produit textile
WO2010051299A1 (fr) * 2008-10-30 2010-05-06 E. I. Du Pont De Nemours And Company Composant non porteur résistant aux coupures pour flanc de pneumatique, pneumatique contenant ledit composant, et processus de fabrication associés
ITMI20101687A1 (it) * 2010-09-17 2012-03-18 Lenzi Tecnologie S R L Calzatura di sicurezza
DE102010022658A1 (de) * 2010-06-04 2012-06-28 Rainer Seiz Textilbeschichtung mit alpinen Gesteinen zur Erzielung höchster Hitze-, Schnitt- und Abriebfestigkeiten
US8336915B2 (en) 2005-01-31 2012-12-25 Trüb AG Method of producing a booklet, data page produced by this method and booklet produced by the method
CH705578A1 (de) * 2011-10-10 2013-04-15 Schoeller Textil Ag Durchtrittsichere Schuhinnensohle und Verfahren zur Herstellung.
US8450222B2 (en) 2007-03-26 2013-05-28 Barrday Inc. Coated multi-threat materials and methods for fabricating the same
US20140026290A1 (en) * 2012-07-26 2014-01-30 Warwick Mills Inc. Three dimensional glove with performance-enhancing layer laminated thereto
US8709959B2 (en) 2009-12-28 2014-04-29 Kimberly-Clark Worldwide, Inc. Puncture resistant fabric
WO2014159827A1 (fr) * 2013-03-13 2014-10-02 Warwick Mills, Inc. Ensemble de vêtement protecteur intégré
WO2014164615A1 (fr) * 2013-03-13 2014-10-09 Warwick Mills, Inc. Procédé de teinture à deux étapes pour des fils et textiles protecteurs constitués de fibres à ténacité élevée
US10455875B2 (en) 2007-06-06 2019-10-29 Higher Dimension Materials, Inc. Cut, abrasion and/or puncture resistant knitted gloves
US10669127B2 (en) 2016-12-12 2020-06-02 Otis Elevator Company Hybrid fabric-laminated belt for elevator system
US10933699B2 (en) 2016-04-28 2021-03-02 Warwick Mills, Inc. Light weight heat-sealed tire
CN113142721A (zh) * 2021-05-28 2021-07-23 嘉鸿手套实业有限公司 一种耐切割、耐穿刺的工业防护手套

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4518650A (en) * 1980-07-11 1985-05-21 E. I. Du Pont De Nemours And Company Protective clothing of fabric containing a layer of highly fluorinated ion exchange polymer
US5308689A (en) * 1993-02-10 1994-05-03 Junkosha Company, Ltd. Snag-resistant composite fabric
US5565264A (en) * 1994-08-29 1996-10-15 Warwick Mills, Inc. Protective fabric having high penetration resistance
US5589254A (en) * 1992-05-07 1996-12-31 Milliken Research Corporation Method for improving the energy absorption of a high tenacity fabric during a ballistic event
US5634215A (en) * 1995-10-06 1997-06-03 Jd American Workwear, Inc. Work pant garment fabricated from abrasion-resistant material coated with polyurethane
DE19624245C1 (de) * 1996-06-18 1997-10-23 Saechsisches Textilforsch Inst Schnitthemmender und flüssigkeitsdichter Arbeitsschutz-Handschuh mit hohem Tragekomfort
WO1999017626A1 (fr) * 1997-10-08 1999-04-15 Hoechst Celanese Corporation Articles polymeres ayant une resistant aux coupures accrue
DE19802242A1 (de) * 1998-01-22 1999-08-05 Akzo Nobel Nv Stich- und Kugelschutzkleidung
US6044493A (en) * 1997-08-27 2000-04-04 Rubotech, Inc. Stretchable protective garments and method for making same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH055276A (ja) * 1990-11-29 1993-01-14 Toray Ind Inc 防水性シートおよび雨具
JP3461988B2 (ja) * 1995-10-05 2003-10-27 日本バイリーン株式会社 透湿防水性基材

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4518650A (en) * 1980-07-11 1985-05-21 E. I. Du Pont De Nemours And Company Protective clothing of fabric containing a layer of highly fluorinated ion exchange polymer
US5589254A (en) * 1992-05-07 1996-12-31 Milliken Research Corporation Method for improving the energy absorption of a high tenacity fabric during a ballistic event
US5308689A (en) * 1993-02-10 1994-05-03 Junkosha Company, Ltd. Snag-resistant composite fabric
US5565264A (en) * 1994-08-29 1996-10-15 Warwick Mills, Inc. Protective fabric having high penetration resistance
US5634215A (en) * 1995-10-06 1997-06-03 Jd American Workwear, Inc. Work pant garment fabricated from abrasion-resistant material coated with polyurethane
DE19624245C1 (de) * 1996-06-18 1997-10-23 Saechsisches Textilforsch Inst Schnitthemmender und flüssigkeitsdichter Arbeitsschutz-Handschuh mit hohem Tragekomfort
US6044493A (en) * 1997-08-27 2000-04-04 Rubotech, Inc. Stretchable protective garments and method for making same
WO1999017626A1 (fr) * 1997-10-08 1999-04-15 Hoechst Celanese Corporation Articles polymeres ayant une resistant aux coupures accrue
DE19802242A1 (de) * 1998-01-22 1999-08-05 Akzo Nobel Nv Stich- und Kugelschutzkleidung

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch, Week 199307 Derwent Publications Ltd., London, GB; Class A28, AN 1993-055402 XP002171359 & JP 05 005276 A (TORAY IND INC), 14 January 1993 (1993-01-14) *
DATABASE WPI Section Ch, Week 199726 Derwent Publications Ltd., London, GB; Class A23, AN 1997-285439 XP002171360 & JP 09 105059 A (JAPAN VILENE CO LTD), 22 April 1997 (1997-04-22) *

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6548430B1 (en) 1994-08-29 2003-04-15 Warwick Mills, Inc. Protective fabric having high penetration resistance
US6720277B1 (en) 1994-08-29 2004-04-13 Warwick Mills, Inc. Protective fabric having high penetration resistance
US6693052B2 (en) 1996-10-15 2004-02-17 Warwick Mills, Inc. Garment including protective fabric
US6543055B2 (en) 1998-10-26 2003-04-08 Warwick Mills, Inc. Penetration resistant garment
WO2002018126A2 (fr) * 2000-08-30 2002-03-07 Warwick Mills, Inc. Systèmes textiles multicouches laminés
WO2002018126A3 (fr) * 2000-08-30 2003-01-16 Warwick Mills Inc Systèmes textiles multicouches laminés
US6668868B2 (en) 2000-08-30 2003-12-30 Warwick Mills, Inc Woven fabric constructions having high cover factors and fill yarns with a weight per unit length less than the weight per unit length of warp yarns of the fabric
EP1199400A2 (fr) * 2000-10-20 2002-04-24 ROTTA GmbH Composition de revêtement aqueuse contenant de polyuréthane pour matériau textile
EP1199400A3 (fr) * 2000-10-20 2004-03-24 ROTTA GmbH Composition de revêtement aqueuse contenant de polyuréthane pour matériau textile
WO2003057462A1 (fr) * 2001-12-31 2003-07-17 Higher Dimension Medical, Inc. Tissu resistant a la penetration pourvu d'ensembles de plaques de protection a multiples couches et procede de fabrication
US8336915B2 (en) 2005-01-31 2012-12-25 Trüb AG Method of producing a booklet, data page produced by this method and booklet produced by the method
WO2007148365A1 (fr) * 2006-06-21 2007-12-27 Tessiltoschi Industrie Tessili S.P.A. Produit textile
US8450222B2 (en) 2007-03-26 2013-05-28 Barrday Inc. Coated multi-threat materials and methods for fabricating the same
US10455875B2 (en) 2007-06-06 2019-10-29 Higher Dimension Materials, Inc. Cut, abrasion and/or puncture resistant knitted gloves
WO2010051299A1 (fr) * 2008-10-30 2010-05-06 E. I. Du Pont De Nemours And Company Composant non porteur résistant aux coupures pour flanc de pneumatique, pneumatique contenant ledit composant, et processus de fabrication associés
US8709959B2 (en) 2009-12-28 2014-04-29 Kimberly-Clark Worldwide, Inc. Puncture resistant fabric
DE102010022658A1 (de) * 2010-06-04 2012-06-28 Rainer Seiz Textilbeschichtung mit alpinen Gesteinen zur Erzielung höchster Hitze-, Schnitt- und Abriebfestigkeiten
ITMI20101687A1 (it) * 2010-09-17 2012-03-18 Lenzi Tecnologie S R L Calzatura di sicurezza
CH705578A1 (de) * 2011-10-10 2013-04-15 Schoeller Textil Ag Durchtrittsichere Schuhinnensohle und Verfahren zur Herstellung.
US20140026290A1 (en) * 2012-07-26 2014-01-30 Warwick Mills Inc. Three dimensional glove with performance-enhancing layer laminated thereto
WO2014159827A1 (fr) * 2013-03-13 2014-10-02 Warwick Mills, Inc. Ensemble de vêtement protecteur intégré
US20150274982A1 (en) * 2013-03-13 2015-10-01 Warwick Mills, Inc. Two step dyeing process for protective yarns and textiles made from high tenacity fibers
GB2526500A (en) * 2013-03-13 2015-11-25 Warwick Mills Inc Integrated protective garment ensemble
GB2531919A (en) * 2013-03-13 2016-05-04 Warwick Mills Inc Two step dyeing process for protective yarns and textiles made from high tenacity fibers
US9557143B2 (en) 2013-03-13 2017-01-31 Warwick Mills Inc. Integrated protective garment ensemble
WO2014164615A1 (fr) * 2013-03-13 2014-10-09 Warwick Mills, Inc. Procédé de teinture à deux étapes pour des fils et textiles protecteurs constitués de fibres à ténacité élevée
US10933699B2 (en) 2016-04-28 2021-03-02 Warwick Mills, Inc. Light weight heat-sealed tire
US10669127B2 (en) 2016-12-12 2020-06-02 Otis Elevator Company Hybrid fabric-laminated belt for elevator system
CN113142721A (zh) * 2021-05-28 2021-07-23 嘉鸿手套实业有限公司 一种耐切割、耐穿刺的工业防护手套
CN113142721B (zh) * 2021-05-28 2024-04-02 嘉鸿手套实业有限公司 一种耐切割、耐穿刺的工业防护手套

Also Published As

Publication number Publication date
WO2001029299A3 (fr) 2002-01-03
AU8028800A (en) 2001-04-30

Similar Documents

Publication Publication Date Title
WO2001029299A2 (fr) Tissus protecteurs enduits
AU743770B2 (en) Stab and bullet proof protective clothing
CA1178524A (fr) Piece de rembourrage a poser au fer chaud
US6033779A (en) Composite yarn with thermoplastic liquid component
US5976996A (en) Protective fabric having high penetration resistance
CA2620324C (fr) Composites balistiques flexibles resistants a la prise de liquides, leur procede de fabrication et articles realises a partir de ces composites
US6720277B1 (en) Protective fabric having high penetration resistance
EP1595105B9 (fr) Materiau composite souple empechant toute penetration
WO2002018688A2 (fr) Textiles formes a partir de melanges intimes constitues de plus d'un type de fibre
US8349112B2 (en) Process for producing fabrics comprising unidirectionally arranged polymeric tapes
WO2002018687A2 (fr) Assemblages de tissus presentant des facteurs de couverture eleves et formes de fils de chaine presentant un poids par unite de longueur inferieur au poids par unite de longueur des fils de trames du meme tissu
EP3350365A1 (fr) Tissus uhmwpe à haute résistance à faible porosité
MXPA04001625A (es) Hilos resistentes al corte y proceso para elaborar los mismos, telas y guantes.
JP4511932B2 (ja) 耐貫通性生命保護物品
US20010002351A1 (en) Garment including protective fabric
EP0962562A1 (fr) Fil
EP0962313A1 (fr) Matériau textile laminé
KR101787793B1 (ko) 내절단성 물품
KR102318679B1 (ko) 복합재 및 복합재를 포함하는 방탄 방호구 물품
KR20010089661A (ko) 혼성 방호용 복합재
CA2662678A1 (fr) Tissus et articles resistants aux coupures en fibres a titres multiples et leurs procedes de fabrication
KR20080021149A (ko) 중합체 줄무늬 코팅으로 방탄 성능이 향상된 직물
EP0910689B1 (fr) Procede de fabrication d'un feutre, feutre ainsi fabrique et pieces profilees anti-balistiques fabriquees a partir de ce feutre
JPS5952639A (ja) 芳香族ポリアミド繊維積層シ−ト
WO2001012000A1 (fr) Materiau composite permeable a la vapeur d'eau

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
AK Designated states

Kind code of ref document: A3

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase in:

Ref country code: JP