Classifications

• • 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
  • A41D31/08—Heat resistant; Fire retardant
• • A—HUMAN NECESSITIES
  • A41—WEARING APPAREL
  • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
  • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
  • A41D13/0002—Details of protective garments not provided for in groups A41D13/0007 - A41D13/1281
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D1/00—Woven fabrics designed to make specified articles
  • D03D1/0035—Protective fabrics
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
  • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
  • D03D15/208—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads cellulose-based
  • D03D15/225—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads cellulose-based artificial, e.g. viscose
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
  • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
  • D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
  • D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
  • D03D15/513—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads heat-resistant or fireproof
• • A—HUMAN NECESSITIES
  • A41—WEARING APPAREL
  • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
  • A41D2500/00—Materials for garments
  • A41D2500/20—Woven
• • 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
  • D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
  • D10B2201/20—Cellulose-derived artificial fibres
  • D10B2201/22—Cellulose-derived artificial fibres made from cellulose solutions
• • 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
  • D10B2331/14—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polycondensates of cyclic compounds, e.g. polyimides, polybenzimidazoles
• • 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
  • D10B2501/00—Wearing apparel
  • D10B2501/04—Outerwear; Protective garments
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
  • Y10T442/3179—Woven fabric is characterized by a particular or differential weave other than fabric in which the strand denier or warp/weft pick count is specified
  • Y10T442/3293—Warp and weft are identical and contain at least two chemically different strand materials

Definitions

• the present invention relates to a flame-retardant fabric and protective clothing made of the flame-retardant fabric.
• Patent Document 1 discloses a fabric that is mainly made of aramid fibers such as para-aramid fibers or meta-aramid fibers.
• aramid fibers are expensive, which causes a bottleneck in widespread use of safe products.
• Patent Document 2 discloses a flame-retardant fabric that includes modacrylic fibers, cellulose fibers, and polyimide fibers.
• the present invention provides a flame-retardant fabric whose char length is short in a flammability test and that has favorable flame retardancy, and protective clothing made of the flame-retardant fabric.
• the present invention relates to a flame-retardant fabric that includes modacrylic fibers, one or more of regenerated cellulose fibers selected from the group consisting of flame-retardant rayon fibers and lyocell fibers, and polyimide fibers, wherein the flame-retardant fabric includes the modacrylic fibers in an amount of 26 to 79 wt%, the regenerated cellulose fibers in an amount of 18 to 48 wt%, and the polyimide fibers in an amount of 3 to 26 wt%, the polyimide fibers have a fiber length of 45 to 127 mm, and a char length flame-retardant fabric measured by a flammability test based on GB/T 5455-1997 is 50 mm or less.
• the present invention also relates to protective clothing made of the flame-retardant fabric.
• the present invention can provide a flame-retardant fabric whose char length is short in a flammability test and that has favorable flame retardancy, and protective clothing made of the flame-retardant fabric.
• the inventors of the present invention conducted numerous studies in order to improve the flame retardancy of a flame-retardant fabric that includes modacrylic fibers, cellulose fibers, and polyimide fibers. As a result, they surprisingly found that, when a flammability test was performed on a fabric made of predetermined amounts of modacrylic fibers, flame-retardant rayon fibers and/or lyocell fibers, and polyimide fibers in which the polyimide fibers had a fiber length of 45 to 127 mm, the char length of the fabric was short, specifically 50 mm or less.
• the char length of the fabric was short, specifically 50 mm or less, in a flammability test even in the case where the content of polyimide was small.
• the “char length” can be measured by a flammability test based on GB/T 5455-1997. Note that “GB” as used herein means the “Chinese National Standard”.
• the inventors of the present invention found that, when a flame-retardant fabric was made of spun yarn that includes modacrylic fibers, flame-retardant rayon fibers and/or lyocell fibers, and polyimide fibers, and the blend amounts of the fibers in this flame-retardant fabric were the same, the char length was significantly short in a flammability test and the flame retardancy was significantly improved in the case where the polyimide fibers had a fiber length of 45 to 127 mm.
• the type, the blend amount, and the like of fibers used to impart flame retardancy to a fabric are mainly adjusted in order to improve the flame retardancy of a flame-retardant fabric.
• the finding that the fiber length of fibers has an influence on flame retardancy leads to a breakthrough.
• the means for improving flame retardancy of a fabric, particularly a fabric made of spun yarn, by setting the fiber length of polyimide fibers in a predetermined range, and thereby significantly reducing the char length of the fabric in a flammability test is innovative, and a person skilled in the art cannot easily devise it.
• the flame-retardant fabric includes modacrylic fibers in an amount of 26 to 79 wt%, regenerated cellulose fibers selected from the group consisting of flame-retardant rayon fibers and lyocell fibers in an amount of 18 to 48 wt%, and polyimide fibers in an amount of 3 to 26 wt%.
• the flame-retardant fabric includes modacrylic fibers in an amount of 44.5 to 79 wt%, regenerated cellulose fibers selected from the group consisting of flame-retardant rayon fibers and lyocell fibers in an amount of 18 to 48 wt%, and polyimide fibers in an amount of 3 to 7.5 wt%.
• the flame-retardant fabric can be made of spun yarn that includes modacrylic fibers in an amount of 26 to 79 wt%, regenerated cellulose fibers selected from the group consisting of flame-retardant rayon fibers and lyocell fibers in an amount of 18 to 48 wt%, and polyimide fibers in an amount of 3 to 26 wt%.
• the flame-retardant fabric is made of spun yarn that includes modacrylic fibers in an amount of 44.5 to 79 wt%, regenerated cellulose fibers selected from the group consisting of flame-retardant rayon fibers and lyocell fibers in an amount of 18 to 48 wt%, and polyimide fibers in an amount of 3 to 7.5 wt%.
• the spun yarn can be manufactured using a known spinning method. Examples of the spinning method include ring spinning, air spinning, and air-jet spinning, but there is no particular limitation thereto.
• the polyimide fibers have a fiber length of 45 to 127 mm.
• the polyimide fibers have a fiber length of 45 mm or more, it is possible to improve the flame retardancy and significantly reduce the char length of the fabric in a flammability test.
• the polyimide fibers have a fiber length of 127 mm or less, the spun yarn can be produced using a general-purpose spinning apparatus, which leads to favorable productivity.
• the polyimide fibers preferably have a fiber length of 45 to 76 mm, more preferably 45 to 64 mm, and even more preferably 45 to 55 mm.
• polyimide fibers there is no particular limitation on the polyimide fibers, and polyimide fibers made of polyimide formed through polymerization of a tetracarboxylic acid component and a diamine component can be used as appropriate, for example.
• tetracarboxylic acid component examples include tetracarboxylic dianhydrides.
• tetracarboxylic dianhydrides 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA), pyromellitic dianhydride (PMDA), oxydiphthalic anhydride (ODPA), and the like can be favorably used as the tetracarboxylic dianhydride, but there is no particular limitation thereto.
• BPDA 3,3′,4,4′-biphenyltetracarboxylic dianhydride
• PMDA pyromellitic dianhydride
• ODPA oxydiphthalic anhydride
• the tetracarboxylic dianhydrides may be used alone or in combination of two or more.
• diamine component examples include diisocyanate compounds and diamine compounds.
• diisocyanate compounds examples include diisocyanate compounds and diamine compounds.
• 2,4-toluene diisocyanate, 2,5-toluene diisocyanate, 2,6-toluene diisocyanate, and the like can be favorably used as the diisocyanate compound, but there is no particular limitation thereto.
• the diamine compound is preferably an aromatic diamine compound.
• paraphenylene diamine PPD
• 4,4′-diaminodiphenyl ether ODA
• 3,4′-diaminodiphenyl ether 2,2′-bis(trifluoromethyl)benzidine, and the like
• PPD paraphenylene diamine
• ODA 4,4′-diaminodiphenyl ether
• 3,4′-diaminodiphenyl ether 2,2′-bis(trifluoromethyl)benzidine, and the like
• the diamine components may be used alone or in combination of two or more.
• the flame-retardant fabric preferably includes polyimide fibers in an amount of 3 to 7.5 wt%, more preferably in an amount of 4 to 7 wt%, even more preferably in an amount of 4.5 to 6.5 wt%, and particularly preferably in an amount of 5 to 6.5 wt%, but there is no particular limitation thereto.
• a commercially available product such as ASPI (registered trademark) polyimide fibers manufactured by China Jiangsu Aoshen Hi-Tech Materials Co., Ltd may also be used as the polyimide fibers.
• the modacrylic fibers are preferably made of an acrylonitrile copolymer formed through copolymerization of 35 to 85 wt% of acrylonitrile and 15 to 65 wt% of another component. From the viewpoint of the flame retardancy, it is preferable to use, as the other component, one or more components selected from, for example, the group consisting of halogen-containing vinyl monomers and halogen-containing vinylidene monomers.
• the content of acrylonitrile in the acrylonitrile copolymer is more preferably 35 to 65 wt%.
• the contents of a halogen-containing vinyl monomer and/or a halogen-containing vinylidene monomer in the acrylonitrile copolymer are more preferably 35 to 65 wt%.
• the acrylonitrile copolymer may further include a monomer having a sulfonic group.
• the content of a monomer having a sulfonic group in the acrylonitrile copolymer is preferably 0 to 3 wt%.
• the acrylonitrile copolymer preferably includes acrylonitrile in an amount of 35 to 85 wt%, one or more halogen-containing monomers selected from the group consisting of halogen-containing vinyl monomers and halogen-containing vinylidene monomers in an amount of 15 to 65 wt%, and a monomer having a sulfonic group in an amount of 0 to 3 wt%, and more preferably includes acrylonitrile in an amount of 40 to 75 wt%, one or more halogen-containing monomers selected from the group consisting of halogen-containing vinyl monomers and halogen-containing vinylidene monomers in an amount of 24.5 to 60 wt%, and a monomer having a sulfonic group in an amount of 0.5 to 3 wt%.
• the modacrylic fibers When the content of acrylonitrile in the acrylonitrile copolymer is 35 to 85 wt%, the modacrylic fibers have favorable fiber physical properties, and thus the flame-retardant fabric that includes the modacrylic fibers also have favorable physical properties.
• the modacrylic fibers When the contents of the halogen-containing vinyl monomer and/or the halogen-containing vinylidene monomer in the acrylonitrile copolymer are 15 to 65 wt%, the modacrylic fibers have favorable flame retardancy, and thus the flame-retardant fabric that includes the modacrylic fibers also have favorable flame retardancy.
• halogen-containing vinyl monomers examples include vinyl chloride and vinyl bromide, but there is no particular limitation thereto.
• examples of the halogen-containing vinylidene monomers include vinylidene chloride and vinylidene bromide, but there is no particular limitation thereto.
• the halogen-containing vinyl monomers and the halogen-containing vinylidene monomers may be used alone or in combination of two or more.
• Examples of the monomer having a sulfonic group include methacrylsulfonic acid, allylsulfonic acid, styrenesulfonic acid, 2-acrylamide-2-methylpropanesulfonic acid, and salts thereof, but there is no particular limitation thereto.
• Examples of the salts include sodium salts, potassium salts, and ammonium salts, but there is no limitation thereto.
• the monomers having a sulfonic group may be used alone or in combination of two or more. The monomer having a sulfonic group is used as necessary, but when the content of the monomer having a sulfonic group in the acrylonitrile copolymer is 3 wt% or less, the production stability in the spinning process will be excellent.
• the modacrylic fibers contain an antimony compound.
• the content of the antimony compound in each of the modacrylic fibers is 3.9 to 20 wt%, preferably 4.2 to 18 wt%, more preferably 4.5 to 16 wt%, and even more preferably 4.7 to 14 wt%, with respect to the overall weight of the fiber.
• the content of the antimony compound is within the above-described range, the char length is more likely to decrease in a flammability test, and the afterglow time also decreases.
• the antimony compound is preferably one or more compounds selected from the group consisting of antimony trioxide, antimony tetroxide, and antimony pentoxide, but there is no particular limitation thereto.
• short fibers having a fiber length of 30 to 127 mm, preferably 45 to 127 mm, more preferably 45 to 76 mm, and even more preferably 45 to 64 mm, can be appropriately used as the modacrylic fibers. It is preferable that the modacrylic fibers have substantially the same fiber length as that of the polyimide fibers. This makes it possible to improve the spinnability and thereby increase the yarn quality such as strength, and thus the physical properties of the flame-retardant fabric may be improved.
• the flame-retardant fabric preferably includes modacrylic fibers in an amount of 44.5 to 65 wt%, more preferably in an amount of 50 to 65 wt%, and even more preferably in an amount of 50 to 60 wt%.
• rayon fibers containing a phosphorus-based flame retardant are used as the flame-retardant rayon fibers.
• the phosphorus-based flame retardant include phosphoric ester-based compounds, halogen-containing phosphoric ester-based compounds, condensed phosphoric ester-based compounds, polyphosphate-based compounds, and polyphosphoric ester-based compounds, but there is no particular limitation thereto.
• the flame-retardant rayon fibers containing the phosphorus-based flame retardant preferably include, for example, the phosphorus-based flame retardant in an amount of 0.5 wt% or more, and more preferably 0.8 wt% or more, with respect to the overall weight of the fibers, but there is no particular limitation thereto.
• flame-retardant rayon fibers such as flame-retardant rayon “Lenzing FR (registered trademark)” manufactured by Lenzing and flame-retardant rayon “JWELL FR (trademark)” manufactured by Jilin Chemical Fibre Co., Ltd. may also be used as the flame-retardant rayon fibers containing the phosphorus-based flame retardant.
• the flame-retardant fabric includes phosphorus in an amount of 0.3 wt% or more, preferably 0.4 wt% or more, and more preferably 0.5 wt% or more, with respect to the overall weight of the fabric.
• the content of phosphorus in the flame-retardant fabric is 0.3 wt% or more, the char length is more likely to decrease, and the flame retardancy is further improved.
• the content of phosphorus is preferably 1.1 wt% or less with respect to the overall weight of the fabric from the viewpoint of further reducing the char length of the flame-retardant fabric.
• the content of phosphorus in the flame-retardant fabric can be measured using a fluorescent X-ray analysis method.
• the flame-retardant fabric when the flame-retardant fabric includes the modacrylic fibers made of an acrylonitrile copolymer formed through copolymerization of acrylonitrile and a vinyl halide monomer, the flame-retardant fabric preferably includes flame-retardant rayon fibers as the regenerated cellulose fibers from the viewpoint of further improving the flame retardancy.
• the flame-retardant fabric Due to the regenerated cellulose fibers includedin the flame-retardant fabric in addition to the polyimide fibers and modacrylic fibers, an excellent texture and moisture absorbency can be imparted to the flame-retardant fabric while the flame retardancy is improved.
• the flame-retardant fabric preferably includes the regenerated cellulose fibers in an amount of 18 to 45 wt%, and more preferably in an amount of 20 to 40 wt%.
• short fibers having a fiber length of 30 to 127 mm, preferably 45 to 127 mm, more preferably 45 to 76 mm, and even more preferably 45 to 64 mm, can be appropriately used as the flame-retardant rayon fibers and the lyocell fibers.
• the flame-retardant rayon fibers and the lyocell fibers have substantially the same fiber length as that of the polyimide fibers. This makes it possible to improve the spinnability and thereby increase the yarn quality such as strength, and thus the physical properties of the flame-retardant fabric may be improved.
• the modacrylic fibers, the flame-retardant rayon fibers, and the lyocell fibers have substantially the same fiber length as that of the polyimide fibers.
• the flame-retardant fabric may include other fibers as long as the object and the effects of the present invention are not inhibited.
• the other fibers include conductive fibers, nylon fibers, and polyester fibers.
• the flame-retardant fabric may include the other fibers in an amount of 5 wt% or less, 3 wt% or less, or 1 wt% or less.
• short fibers having a fiber length of 30 to 127 mm can be appropriately used as the other fibers, and the fiber length is preferably 45 to 127 mm, more preferably 45 to 76 mm, and even more preferably 45 to 64 mm, from the viewpoint of the productivity in the spinning process.
• the other fibers have substantially the same fiber length as that of the polyimide fibers. This makes it possible to improve the spinnability and thereby increase the yarn quality such as strength, and thus the physical properties of the flame-retardant fabric may be improved. It is particularly preferable that all the fibers included in the spun yarn have substantially the same fiber length as that of the polyimide fibers.
• all of the modacrylic fibers, the flame-retardant rayon fibers, the lyocell fibers, and the other fibers preferably have a single fiber fineness of 1 to 20 dtex, and more preferably 1.5 to 15 dtex.
• the flame-retardant fabric preferably has a basis weight of 100 to 500 g/m 2 , more preferably 130 to 480 g/m 2 , and even more preferably 150 to 460 g/m 2 .
• Examples of the form of the flame-retardant fabric include a woven fabric and a knitted fabric, but there is no particular limitation thereto.
• a woven fabric is preferable from the viewpoint of the durability and flame retardancy.
• Three foundation weave such as a plain weave, a twill weave, and a sateen weave may be applied, and a patterned woven fabric obtained by using a special loom such as a dobby loom or a Jacquard loom may be used.
• the flame-retardant fabric has excellent flame retardancy, and the char length measured by a flammability test based on GB/T 5455-1997 is 50 mm or less.
• the char length is 50 mm or less, the class-A standard for the char length of a “flame-retardant protective clothing” specified in GB 8965.1-2009 will be satisfied.
• the char length of the flame-retardant fabric measured by a flammability test based on GB/T 5455-1997 is 50 mm or less after the flame-retardant fabric is washed 50 times in accordance with GB/T 17596-1998.
• the flame-retardant fabric has excellent flame retardancy
• the afterglow time measured by a flammability test based on GB/T 5455-1997 is preferably 2.0 seconds or less. It is more preferable that the afterglow time measured by a flammability test based on GB/T 5455-1997 is 2.0 seconds or less after the flame-retardant fabric is washed 50 times in accordance with GB/T 17596-1998.
• the afterglow time is 2.0 seconds or less, the class-A or class-B standard for the afterglow time of a “flame-retardant protective clothing” specifiedin GB 8965.1-2009 will be satisfied.
• the flame-retardant fabric has a char length of 50 mm or less and an afterglow time of 2.0 seconds or less, and it is particularly preferable that the flame-retardant fabric has a char length of 50 mm or less and an afterglow time of 2.0 seconds or less after being washed 50 times in accordance with GB/T 17596-1998.
• the flame-retardant fabric has excellent flame retardancy, and the afterflame time measured by a flammability test based on GB/T 5455-1997 is 2.0 seconds or less. It is more preferable that the afterflame time measured by a flammability test based on GB/T 5455-1997 is 2.0 seconds or less after the flame-retardant fabric is washed 50 times in accordance with GB/T 17596-1998.
• the afterflame time is 2.0 seconds or less, the class-A or class-B standard for the afterflame time of a “flame-retardant protective clothing” specified in GB 8965.1-2009 will be satisfied.
• the flame-retardant fabric of the present invention can be favorably used as a fabric for protective clothing required to have flame retardancy, thus making it possible to provide, at low cost, protective clothing that is made of the flame-retardant fabric and has excellent flame retardancy.
• the protective clothing of the present invention can be manufactured using the flame-retardant fabric through a known sewing method. Since the flame-retardant fabric has excellent flame retardancy, the protective clothing of the present invention also has excellent flame retardancy. Also, since the flame-retardant fabric has excellent flame retardancy even after being washed repeatedly, the protective clothing retains flame retardancy even after being washed repeatedly.
• the protective clothing of the present invention can be used in any operations in which flame retardancy is required.
• the protective clothing of the present invention can be used as protective clothing to be worn in workplaces in the fields of petroleum, petrochemistry, coal mine, electric power, welding, and the like in which accidents such as a fire may happen, and protective clothing to be worn in workplaces in the fields of metalworking and the like in which accidents such as a dust explosion are likely to happen.
• Modacrylic fibers that were made of an modacrylic copolymer containing acrylonitrile in an amount of 49.5 wt%, vinyl chloride in an amount of 49.5 wt%, and sodium styrenesulfonate in an amount of 1.0 wt%, and that contained antimony trioxide in an amount of 9.1 wt% with respect to the overall weight of the fibers were used as modacrylic fibers I.
• Aflammability test was performed based on GB/T 5455-1997 to measure the char length (the length of a carbonized portion), afterflame time, and afterglow time of the fabric. Note that the fabrics of Examples 1 to 3 and Comparative Examples 1 to 3 were washed 50 times in accordance with GB/T 17596-1998 and were then subjected to the flammability test.
• Fiber type Fiber length (mm) Ex. 1 Ex. 2 Ex. 3 Comp. Ex. 1 Comp. Ex. 2 Comp. Ex. 3 Blend amount (wt%) Modacrylic fiber I: 51 55 55 57 55 55 57 Lyocell: 51 17 37 17 17 37 17 Flame retardant rayon: 51 20 0 20 20 0 20 Polyimide fiber 1: 51 8 8 6 0 0 0 Polyimide fiber II: 38 0 0 0 8 8 6 Spun yarn Cotton count No.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Mechanical Engineering (AREA)
• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Physical Education & Sports Medicine (AREA)
• Woven Fabrics (AREA)

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• 2020
  • 2020-09-28 JP JP2022551103A patent/JP7621369B2/ja active Active
  • 2020-09-28 US US18/044,737 patent/US20230270194A1/en active Pending
  • 2020-09-28 CN CN202080105332.XA patent/CN116249805B/zh active Active
  • 2020-09-28 WO PCT/JP2020/036656 patent/WO2022064703A1/ja not_active Ceased

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