Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B21/14—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes
  • D04B21/16—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes incorporating synthetic threads
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
  • D02G3/04—Blended or other yarns or threads containing components made from different materials
  • D02G3/045—Blended or other yarns or threads containing components made from different materials all components being made from artificial or synthetic material
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
  • D02G3/04—Blended or other yarns or threads containing components made from different materials
  • D02G3/047—Blended or other yarns or threads containing components made from different materials including aramid fibres
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
  • D02G3/12—Threads containing metallic filaments or strips
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
  • D02G3/16—Yarns or threads made from mineral substances
  • D02G3/18—Yarns or threads made from mineral substances from glass or the like
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
  • D02G3/26—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre with characteristics dependent on the amount or direction of twist
  • D02G3/28—Doubled, plied, or cabled threads
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
  • D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
  • D02G3/36—Cored or coated yarns or threads
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
  • D02G3/442—Cut or abrasion resistant yarns or threads
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
  • D02G3/443—Heat-resistant, fireproof or flame-retardant yarns or threads
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D1/00—Woven fabrics designed to make specified articles
  • D03D1/0017—Woven household fabrics
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B1/10—Patterned fabrics or articles
  • D04B1/12—Patterned fabrics or articles characterised by thread material
  • D04B1/123—Patterned fabrics or articles characterised by thread material with laid-in unlooped yarn, e.g. fleece fabrics
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
  • D04B1/16—Other fabrics or articles characterised primarily by the use of particular thread materials synthetic threads
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B1/22—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration
  • D04B1/24—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration wearing apparel
  • D04B1/28—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration wearing apparel gloves
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B21/20—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting articles of particular configuration
  • D04B21/207—Wearing apparel or garment blanks
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2101/00—Inorganic fibres
  • D10B2101/20—Metallic fibres
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • D10B2321/10—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
  • D10B2321/101—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide modacrylic
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
  • D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
  • D10B2331/021—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides aromatic polyamides, e.g. aramides
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
  • D10B2331/06—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyethers
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
  • D10B2331/12—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyureas
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2401/00—Physical properties
  • D10B2401/04—Heat-responsive characteristics
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2401/00—Physical properties
  • D10B2401/06—Load-responsive characteristics
  • D10B2401/061—Load-responsive characteristics elastic
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2401/00—Physical properties
  • D10B2401/16—Physical properties antistatic; conductive
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2403/00—Details of fabric structure established in the fabric forming process
  • D10B2403/01—Surface features
  • D10B2403/011—Dissimilar front and back faces
  • D10B2403/0114—Dissimilar front and back faces with one or more yarns appearing predominantly on one face, e.g. plated or paralleled yarns
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2501/00—Wearing apparel
  • D10B2501/04—Outerwear; Protective garments
  • D10B2501/041—Gloves

Definitions

• This invention relates to yarns and fabrics suitable for use in articles of protective clothing that have fire-resistant and form-fitting properties and also have cut resistant properties.
• Yarns comprising modacrylic fiber, p-aramid fiber, and m-aramid fiber that are useful for the production of fabrics which possess arc and flame protective properties are disclosed, for example, in United States Pat. Nos. 7,065,950 and 7,348,059 .
• These yarns may further comprise, as an optional component, 2 to 15 weight percent of an abrasion-resistant fiber such as a nylon and/or 1 to 5 weight percent of an antistatic component.
• Yarns and fabrics having a combination of fire resistance and elastic recovery properties are described, for example, in United States Pat. Nos. 5,069,957 ; 5,527,597 ; and 5,694,981 .
• These existing solutions utilize yarns made by covering elastic core yarns with a substantial protective fiber outer covering made from a fire-resistant fiber.
• these references describe protecting the elastic core by structurally shielding the elastic core from flame by use of another fiber that is in the same yarn.
• a yarn and/or fabric having a combination of fire resistance and elastic recovery properties, along with cut resistance, that specifically incorporates elastic core yarns, that meets the NFPA 2112-2018 Standard; and that further utilizes fibers that have a textile feel to potentially provide a more comfortable protective apparel article.
• the at least one first yarn can further comprise flame-resistant fiber.
• flame-resistant fiber it is meant that a fabric made solely from that fabric has a char length equal to or less than 4 inches and an afterflame equal to or less than 2 seconds per the vertical flame test of ASTM D6143-99; but the fabric does not meet the cut-resistance criteria previously described herein for cut-resistant heat-resistant polymeric fibers.
• Suitable flame-resistant fibers include meta-aramid fibers, with the preferred meta-aramid being poly(metaphenylene isophthalamide).
• the at least one first yarn has 30 to 70 weight percent flame-resistant fiber, based on the total weight of the polymeric fiber in the first yarn. In some other preferred embodiments the at least one first yarn has 50 to 70 weight percent flame-resistant fiber, based on the total weight of the polymeric fiber in the first yarn.
• Both the heat-resistant polymeric fiber and the cut-resistant heat-resistant polymeric fiber in the at least one first yarn are staple fibers preferably having a length of about 2 to 20 centimeters, preferably about 3.5 to 6 centimeters.
• Both the heat-resistant polymeric fiber and the cut-resistant heat-resistant polymeric fiber in the at least one first yarn are staple fibers preferably having a diameter of 5 to 25 micrometers and a linear density of 0.5 to 7 dtex.
• the fibers or filaments that are flame resistant fibers or are not heat-resistant polymeric fiber are staple fibers having dimensions similar to the above ranges for the heat-resistant polymeric fiber and the cut-resistant heat-resistant polymeric fiber.
• the at least one first yarn comprising at least 50 weight percent heat-resistant polymeric fiber, based on the total weight of the first yarn, and wherein at least 30 weight percent of the polymeric fiber present in the at least one first yarn is cut-resistant heat-resistant polymeric fiber having a cut resistance of 500 grams force or higher per ASTM F2992-15, the at least one first yarn further having a sheath/core construction with the sheath comprising the cut-resistant heat-resistant polymeric fiber and the core comprising an inorganic fiber.
• at least one inorganic fiber is preferably added to the yarn.
• the sheath/core construction is used because the sheath staple fibers provide a cover and shield the inorganic filament in the core from direct abrasive contact with the skin giving the fabrics containing the sheath/core yarn improved comfort.
• the inorganic fiber is a glass filament. It can be one or more glass filaments, such as for example 110 dtex(100 denier) glass filament. However, glass is less preferred because it has less cut resistance per linear density than metal and it is much more critical that the glass be substantially covered by the staple fiber sheath to minimize skin irritation should the yarn be used in gloves, sleeves, etc., where the fabric is in contact with the skin. Therefore, in many embodiments the inorganic fiber is a metal filament.
• the at least one second yarn has a sheath/core construction with a sheath of halogenated self-extinguishing staple fibers and a core comprising at least one continuous elastomeric filament, wherein 60 to 95 weight percent of the at least one second yarn is halogenated self-extinguishing fiber, based on the total weight of the second yarn, and the halogenated self-extinguishing fiber is in contact with the at least one continuous elastomeric filament, the second yarn being free or substantially free of inorganic fibers.
• the at least one second yarn has a sheath/core construction, with the sheath of halogenated self-extinguishing staple fibers being in contact with and covering the core of the at least one continuous elastomeric filament. It is believed that the halogenated self-extinguishing staple fibers provide an active flame-extinguishing cover for the core of the at least one continuous elastomeric filament. This is unlike cover fibers that provide "structural shielding" of the core, that is, cover fibers that simply char and remain in place when exposed to a flame and therefore provide a structural barrier between a flame and the elastic core.
• halogenated self-extinguishing staple fibers decomposes in the presence of high thermal flux as in a flame, releasing a halogen gas that displaces localized oxygen from the yarn and hinders the burning of the core of the at least one continuous elastomeric filament. Therefore, it is believed that halogenated self-extinguishing staple fibers should not only cover the core but be in direct contact with the core to locally displace oxygen from the surface of the core of the at least one continuous elastomeric filament.
• the flame-extinguishing effect of the halogenated self-extinguishing staple fibers is adequate when 60 to 95 weight percent of the at least one second yarn is halogenated self-extinguishing fiber, based on the total weight of the second yarn.
• the sheath can also include some fibers of other materials to the extent that decreased flame-extinguishing effect, due to that other material, can be tolerated
• Halogenated self-extinguishing fibers include those made from halogenated polymer.
• the halogenated self-extinguishing staple fibers in the at least one second yarn are staple fibers preferably having a length of about 2 to 9 centimeters, preferably about 3.5 to 6 centimeters.
• the halogenated self-extinguishing staple fibers in the at least one second yarn are staple fibers preferably having a diameter of 5 to 25 micrometers and a linear density of 0.5 to 7 dtex.
• the fabric contains at least one second yarn having a sheath/core construction with a sheath of halogenated self-extinguishing staple fibers and a core comprising at least one continuous elastomeric filament.
• the halogenated self-extinguishing fiber is in contact with the at least one continuous elastomeric filament, eliminating the need for the entire surface of the elastomeric filament(s) to actually be fully covered by the staple fiber sheath.
• Typical stretch ratios are 1.5 to 5.0 with 1.5 to 3.50 being preferred. Low stretch ratios yield less elastic recovery while very high stretch ratios make the single yarns difficult to process and the fabric too tight and uncomfortable.
• the optimum stretch ratio is also dependent on the % weight content of elastomeric core. Tension devices can also be employed to tension and stretch the elastomeric fiber but are less preferred due to the difficulty in reproducing and controlling tension and stretch. The optimum stretch ratio is ultimately determined for each fabric, based on the desired fit and feel of the fabric.
• the incorporation of the at least one continuous elastomeric filament into the second yarn of halogenated self-extinguishing staple fibers can be achieved, for example in its simplest practical application, by passing a roving, sliver, or collection of the halogenated self-extinguishing staple fibers through sets of drafting rolls to make a drafted fiber mass to be ring twisted into a single yarn.
• the at least one continuous elastomeric filament is typically fed from a bobbin through a set of feed rolls and subsequently into the staple fibers prior to the final set of drafting rollers.
• the slower relative surface speed of the feed rollers to the surface speed of the drafting rollers is increased or decreased to determine the amount of elastic stretch and tension in the final ring-twisted single yarn using conventional techniques.
• the sheath of the at least one second yarn can further comprise heat-resistant polymeric fiber as previously described herein. In some other embodiments, the sheath of the at least one second yarn can further comprise cut-resistant heat-resistant polymeric fiber as previously described herein.
• any number of fibers can be included in the second yarn as long the second yarn and the final fabric meets the performance criteria discussed herein.
• the invention relates to a cut-resistant woven or knitted fabric made from a ply-twisted yarn made from at least two singles yarns, the first singles yarn being (a) the at least one first yarn comprising at least 50 weight percent heat-resistant polymeric fiber, based on the total weight of the first yarn, and wherein at least 30 weight percent of the polymeric fiber present in the at least one first yarn is cut-resistant heat-resistant polymeric fiber having a cut resistance of 500 grams force or higher per ASTM F2992-15; and the second singles yarn being (b) the at least one second yarn having a sheath/core construction with a sheath of halogenated self-extinguishing staple fibers and a core comprising at least one continuous elastomeric filament, wherein 60 to 95 weight percent of the at least one second yarn is halogenated self-extinguishing fiber, based on the total weight of the second yarn, and the halogenated self-extinguishing fiber is in contact with the at least one continuous
• the at least one first yarn and the at least one second yarn work synergistically together in both the yarn and fabric.
• the at least one continuous elastomeric filament incorporated into the yarn(s) provides improved stretch and recovery, while the heat-resistant staple fibers provide structure in flame and the heat-resistant cut-resistant organic staple fibers and inorganic filaments (if present) provide the yarn and fabric with excellent cut resistance. Fabrics made from such yarn(s) are soft, comfortable and non-abrasive as well as cut resistant.
• thermosensitive polymeric fiber as discussed herein can be achieved by the use of ASTM E2105-2016 - Standard Practice for General Techniques of Thermogravimetric Analysis (TGA) Coupled With Infrared Analysis (TGA/IR).
• TGA Thermogravimetric Analysis
• TGA/IR Infrared Analysis
• the analysis of whether or not a synthetic organic polymer retains 90 percent of its original fiber weight is conducted by heating a sample in air to 500° C at a rate of 20° C. per minute.
• the first yarn was a 14-cotton count sheath-core yarn having a para-aramid fiber sheath and a 50 micron stainless steel wire core, spun on a ring spinning frame.
• the para-aramid fiber was 2-inch poly(paraphenylene terephthalamide) staple.
• the resulting ply-twisted elastic yarn made by ply twisting the first yarn and the second yarn had a total cotton count of 16/2, or 675 denier. Relative amounts of the yarn components are shown in Table 3.
• the first yarn was a 26-cotton count yarn having a para-aramid fiber sheath and a stainless steel wire core made with a 35 micron stainless steel wire core.
• the second yarn was a 32-cotton count yarn having a modacrylic sheath and a 40-denier spandex core that was stretched 3X during spinning.
• Example 2 the resulting ply-twisted elastic yarn made by ply twisting the first yarn and the second yarn had a total cotton count of 29/2, or 371 denier. Relative amounts of the yarn components are shown in Table 4.
• the resulting ply-twisted elastic yarn was knitted into an 18-gauge sleeve on a Shima-Seiki glove knitting machine.
• the resulting sleeve had excellent form-fitting properties.
• a fabric sample from the resulting sleeve was washed to remove knitting oils and finishes and flame tested in accordance with fire-resistant glove test method detailed in the NFPA-2112-2018 standard.
• the resulting stretch fabric was found to have 0 seconds of after-flame with 3.3 % of the weight consumed during the tests, which was in below the 2-second maximum after-flame requirement and the 5% weight loss limit allowed in the specification.
• Table 4 Component Weight Percent of Ply-twisted yarn (%) Weight Percent in Singles Yarn (%) Para-aramid Fiber 37.4 68 Steel Wire 17.8 32 Modacrylic Fiber 41.2 92 Elastic Fiber 3.6 8
• the first yarn was a 19.5-cotton count yarn having a para-aramid fiber sheath and a stainless steel wire core made with a 45 micron stainless steel wire core that was stretched 3X during spinning.
• the second yarn was a 32-cotton count sheath-core yarn having a 40-denier spandex core; however, the sheath was a blend of 82 weight % modacrylic staple fiber and 10 weight percent of a 2-inch cut-length meta-aramid staple fiber blend; specifically, the meta-aramid blend contained 93 weight % poly(metaphenylene isophthalamide) staple fiber, 5 weight % poly(paraphenylene terephthalamide) staple, and 2 weight % carbon-core nylon antistatic fiber.
• Example 2 the resulting ply-twisted elastic yarn made by ply twisting the first yarn and the second yarn had a total cotton count of 24/2, or 439 denier. Relative amounts of the yarn components are shown in Table 5.
• a comparative ply-twisted elastic yarn similar to that of Example 3 was made; however, the first yarn having a para-aramid fiber sheath and a stainless steel wire core was made with 1.5-inch poly(paraphenylene terephthalamide) staple and a 45-micron stainless steel wire core.
• the second yarn which was again a 32-cotton count sheath-core yarn, had a sheath of solely 1.5 inch cut-length nylon staple core-spun around the 40-denier spandex core.
• the sample produced was flame tested in accordance with fire-resistant glove test method detailed in the EN407:2020 standard.
• the resulting stretch fabric was found to have at least 25-seconds of after-flame after 3 seconds of exposure to the flame, which was higher than 20-second maximum after-flame requirement to achieve even the lowest ranking described in the specification.
• the two ends were then co-knit two-ends in into a sleeve on a 13-gauge knitting machine.
• the resulting sleeve had excellent hand and form fitting properties.
• the two ends were co-knitted two-ends in into a sleeve on a 13-gauge knitting machine.
• the resulting sleeve had excellent hand and form fitting properties.
• a first end that is a 2-ply para-aramid ring spun yarn, each ply yarn made from 2-inch poly(paraphenylene terephthalamide) staple yarns, with each of the two ply yarns having a 16 yarn count, was co-knitted with a second end that was a modacrylic sheath-spandex core elastic yarn, made by ring-spinning a 1200 denier core-spun fiber, with a 440 denier spandex core, that was stretched 3X during the yarn spinning process, to produce a fire-resistant yarn.
• the composition of the elastic core yarn was approximately 12% spandex and 88% modacrylic staple fiber.
• the sample produced was washed to remove knitting oils and finishes and flame tested in accordance with fire-resistant glove test method detailed in the NFPA-2112-2018 standard.
• the resulting stretch fabric was found to have 0-seconds of after-flame with 4% of the weight consumed during the tests, which was in below the 2-second maximum after-flame requirement and the 5% weight loss limit allowed in the specification.
• the 2-ply para-aramid ring spun yarn first end of Example 5 was combined was a different second end, that second end being a polyester fiber wrapped-covered rubber elastic cord from Supreme Elastic Corporation, and the first and second ends were co-knitted to produce an elastic cuff on a Shima-Seiki flatbed knitted machine.
• the elastic cord composition was estimated to be 75% polyester fiber and 25% rubber.
• the ends were co-knitted using a weft insertion technique that inserted the polyester fiber wrapped-covered rubber elastic cord in every third stitch of the 13-gauge knitted sleeve.
• the resulting sleeve had excellent form-fitting properties.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Mechanical Engineering (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
• Gloves (AREA)
• Knitting Of Fabric (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=80780853

Family Applications (1)

Country Status (6)

Families Citing this family (2)

Family Cites Families (36)

• 2022
  • 2022-02-24 US US17/679,820 patent/US20220325451A1/en active Pending
  • 2022-03-01 JP JP2023562752A patent/JP7862436B2/ja active Active
  • 2022-03-01 CN CN202280027946.XA patent/CN117377795B/zh active Active
  • 2022-03-01 WO PCT/US2022/018309 patent/WO2022220937A1/en not_active Ceased
  • 2022-03-01 EP EP22710903.0A patent/EP4323570B1/en active Active
  • 2022-03-01 KR KR1020237034269A patent/KR20230169133A/ko active Pending

Also Published As

Similar Documents

Legal Events