Classifications

• • 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
• • 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
• • 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
• • 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
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
  • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
  • D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
  • D01F6/40—Modacrylic fibres, i.e. containing 35 to 85% acrylonitrile
• • 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
  • D03D13/00—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
  • D03D13/008—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft characterised by weave density or surface weight
• • 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
  • 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
  • D10B2201/01—Natural vegetable 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
  • 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
  • D10B2331/02—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
  • D10B2501/00—Wearing apparel
  • D10B2501/04—Outerwear; Protective garments

Definitions

• the present invention relates to a flame-retardant fabric that exhibits high flame retardancy in a combustion test, and work clothes containing the same.
• Patent Document 1 describes a flame-retardant fabric containing modacrylic fibers containing an antimony compound and cellulose fibers containing a phosphorus compound as a fabric for work wear.
• Patent Document 2 describes that modacrylic fibers and cellulose fibers are used in combination with aramid fibers having high strength.
• the present invention provides flame-retardant fabrics and work clothes that have improved flame retardancy by suppressing a decrease in tear strength after combustion.
• One or more embodiments of the invention include 30-60% by weight modacrylic fibers, 20-50% by weight cellulosic fibers, and 10-20% by weight aramid fibers, and contain tin and zinc based on the total weight of the fabric.
• the present invention relates to a flame-retardant fabric containing 1.4 to 5.0% by mass of a compound containing the compound.
• One or more embodiments of the present invention relate to workwear including the flame-retardant fabric.
• a flame-retardant fabric with improved flame retardance by suppressing a decrease in tear strength after combustion and work clothes containing the same are provided.
• the inventors of the present invention have solved the problem that when modacrylic fibers containing antimony compounds and aramid fibers are used together, the tear strength after combustion decreases, resulting in a longer carbonization length and a decrease in flame retardancy. We have given repeated consideration to this. As a result, by using a compound containing tin and zinc as a flame retardant and incorporating a predetermined amount of this compound into a fabric containing modacrylic fibers, aramid fibers, and cellulose fibers, the tear strength of the fabric after combustion increases, and the tear strength of the fabric increases. It was found that the char length after combustion becomes shorter.
• the tear strength after combustion of the fabric tends to increase, and the carbonization length of the fabric after combustion tends to shorten.
• modacrylic fibers containing antimony compounds are used, the aramid fibers are damaged by antimony gas derived from modacrylic fibers during combustion, resulting in a decrease in tear strength after combustion, but when compounds containing tin and zinc are used, Since the aramid fibers are not damaged, the tear strength of the fabric after combustion does not decrease, and it is presumed that the char length of the fabric after combustion is shortened. Note that the present invention is not limited to such speculation.
• the flame retardant fabric of one or more embodiments of the invention is substantially free of antimony compounds.
• substantially free of antimony compounds means that no antimony compounds are intentionally added to the fibers or fabrics as flame retardants, and it means about 0% by mass.
• the char length of the fabric correlates with the tear strength of the fabric after combustion.
• the fabric of one or more embodiments of the present invention has a char length of 75 mm or less as measured by a flammability test based on ASTM D6413.
• char length means that measured by a flammability test based on ASTM D6413.
• the flame retardant fabric of one or more embodiments of the present invention includes 1.4 to 5.0% by weight of tin and zinc containing compounds. If the content of the compound containing tin and zinc is less than 1.4% by mass, the tear strength after combustion will decrease, the carbonization length will become long, and the flame retardance will be poor. On the other hand, if the content of compounds containing tin and zinc exceeds 5.0% by mass, static electricity is likely to be generated when the card is passed through, resulting in poor spinnability and therefore poor productivity and processability of fibers and fabrics. The cost will also be higher. In addition, in combustion tests, the residual time is longer and the flame retardance is poor.
• the content of compounds containing tin and zinc in the flame-retardant fabric is preferably 1.6% by mass or more, and 1.8% by mass or more.
• the content is more preferably 2.0% by mass or more, even more preferably 2.5% by mass or more.
• the content of compounds containing tin and zinc in the flame-retardant fabric is preferably 4.9% by mass or less, more preferably 4.8% by mass or less. It is preferably 4.7% by mass or less, more preferably 4.6% by mass or less, even more preferably 4.5% by mass or less.
• the compound containing tin and zinc may be attached to the surface of the flame-retardant fabric, but from the viewpoint of washing durability, it is preferably contained inside the fibers constituting the flame-retardant fabric. From the viewpoint of enhancing the flame retardant effect of the compound containing tin and zinc, the compound containing tin and zinc is preferably contained in the modacrylic fiber.
• the content of "compounds containing tin and zinc" in the flame-retardant fabric can be measured by X-ray fluorescence spectroscopy, and specifically as described in Examples. It can be measured as follows.
• the compound containing tin and zinc is not particularly limited, but for example, from the viewpoint of versatility, a zinc stannate compound or the like can be used.
• the zinc stannate compound may be, for example, zinc tin oxide (ZnSnO 3 ) or zinc hexahydroxide (ZnSn(OH) 6 ). From this point of view, tin zinc hexahydroxide is preferred.
• the compound containing tin and zinc is not particularly limited, but for example, from the viewpoint of spinnability and fiber strength, the average particle diameter D50 is preferably 3 ⁇ m or less, more preferably 2.5 ⁇ m or less, and still more preferably 2 ⁇ m or less. Further, the lower limit of the average particle diameter D50 of the compound containing tin and zinc is not particularly limited, but for example, from the viewpoint of handling, it is 0.1 ⁇ m or more, 0.5 ⁇ m or more, 0.6 ⁇ m or more, or 0.7 ⁇ m or more. It may be.
• the average particle size D50 of the compound is based on volume, and in the case of a powder, can be measured by laser diffraction/scattering methods, and in the case of a powder, the average particle size D50 of the compound is In the case of a dispersion (dispersion liquid), it can be measured by a laser diffraction/scattering method or a dynamic light scattering method.
• the modacrylic fibers are not particularly limited as long as they are fibers made from modacrylic polymers, and fibers containing modacrylic polymers can be used as appropriate.
• the modacrylic fiber preferably contains a compound containing tin and zinc in addition to the modacrylic polymer, and more preferably contains a compound containing tin and zinc inside the fiber.
• the modacrylic fiber preferably contains 2.4% by mass or more of a compound containing tin and zinc, more preferably 2.5% by mass or more, and 2.8% by mass or more. It is even more preferable to contain it, more preferably 3.0% by mass or more, even more preferably 3.5% by mass or more, particularly preferably 3.7% by mass or more.
• the modacrylic fiber preferably contains a compound containing tin and zinc at 10.4% by mass or less, more preferably 10.2% by mass or less, and 10.
• the content of "tin and zinc-containing compounds" in modacrylic fibers can be determined by X-ray fluorescence spectroscopy, specifically as described in the Examples. can be measured.
• the modacrylic fiber preferably contains 89.6 to 97.6% by mass of a modacrylic polymer and 2.4 to 10.4% by mass of a compound containing tin and zinc. It is more preferable to contain 89.8 to 97.5% by mass of a modacrylic polymer and 2.5 to 10.2% by mass of a compound containing tin and zinc, and 90.0 to 97.2% by mass of a modacrylic polymer. , and 2.8 to 10.0% by mass of a compound containing tin and zinc, and 90.2 to 97.0% by mass of a modacrylic polymer, and 3.0 to 3.0% of a compound containing tin and zinc.
• the modacrylic fiber preferably contains 2.5 parts by mass or more of a compound containing tin and zinc, and preferably contains 3.0 parts by mass or more, based on 100 parts by mass of the modacrylic polymer.
• the modacrylic fiber preferably contains 11.0 parts by mass or less of a compound containing tin and zinc, more preferably 10.5 parts by mass or less, and 10.5 parts by mass or less. It is more preferable to contain .0 parts by mass or less, even more preferably to contain 9.8 parts by mass or less, even more preferably to contain 9.6 parts by mass or less, even more preferably to contain 9.4 parts by mass or less, It is particularly preferable to contain 9.2 parts by mass or less.
• the modacrylic polymer preferably contains 40 to 70% by mass of acrylonitrile and 30 to 60% by mass of other components. If the acrylonitrile content in the modacrylic polymer is 40 to 70% by mass, the modacrylic fiber will have good heat resistance and flame retardancy.
• components are not particularly limited as long as they can be copolymerized with acrylonitrile.
• examples include halogen-containing monomers and sulfonic acid group-containing monomers.
• halogen-containing monomer examples include halogen-containing vinyl and halogen-containing vinylidene.
• halogen-containing vinyl examples include vinyl chloride and vinyl bromide
• examples of the halogen-containing vinylidene include vinylidene chloride and vinylidene bromide.
• the modacrylic polymer preferably contains 30 to 60% by mass of a halogen-containing monomer as another component.
• the sulfonic acid group-containing monomer examples include methacrylsulfonic acid, allylsulfonic acid, styrenesulfonic acid, 2-acrylamido-2-methylpropanesulfonic acid, and salts thereof.
• the salt examples include, but are not limited to, sodium salt, potassium salt, ammonium salt, and the like.
• These sulfonic acid group-containing monomers may be used alone or in combination of two or more.
• the sulfonic acid group-containing monomer can be used as necessary, for example, to improve dyeability, but if the content of the sulfonic acid group-containing monomer in the modacrylic polymer is 3% by mass or less, Excellent production stability in the spinning process.
• the modacrylic polymer may contain, for example, 0.5 to 3% by weight of a sulfonic acid group-containing monomer.
• the modacrylic polymer preferably contains 40-70% by weight of acrylonitrile, 30-57% by weight of a halogen-containing monomer, and 0-3% by weight of a sulfonic acid group-containing monomer, preferably 45-65% by weight. of acrylonitrile, 35 to 52% by mass of a halogen-containing monomer, and 0 to 3% by mass of a sulfonic acid group-containing monomer.
• the halogen-containing monomer is preferably vinyl chloride and/or vinylidene chloride, more preferably vinylidene chloride.
• the modacrylic polymer contains 40 to 69.5% by mass of acrylonitrile, 30 to 57% by mass of a halogen-containing monomer, and 0.5 to 3% by mass of a sulfonic acid group-containing monomer. It preferably contains 45 to 64.5% by mass of acrylonitrile, 35 to 52% by mass of a halogen-containing monomer, and more preferably 0.5 to 3% by mass of a sulfonic acid group-containing monomer. preferable.
• the halogen-containing monomer is preferably vinyl chloride and/or vinylidene chloride, more preferably vinylidene chloride.
• Modacrylic polymers can be obtained by known polymerization methods such as bulk polymerization, suspension polymerization, emulsion polymerization, and solution polymerization. Among these, suspension polymerization, emulsion polymerization, and solution polymerization are preferred from an industrial viewpoint.
• modacrylic fibers may be added to flame retardant aids, matting agents, crystal nucleating agents, dispersants, lubricants, stabilizers, fluorescent agents, antioxidants, electrostatic agents, etc. within the range that does not impair the effects of the present invention. It may contain various additives such as inhibitors and pigments.
• the content of other additives other than compounds containing tin and zinc may be within a range that does not impede the effects of the present invention, for example, 5% by mass or less, 3% by mass or less, 1% by mass or less. It may be less than %.
• the content of other additives other than compounds containing tin and zinc may be 5 parts by mass or less, for example, per 100 parts by mass of the modacrylic polymer, within a range that does not impede the effects of the present invention.
• the amount may be 3 parts by mass or less, or 1 part by mass or less.
• the single fiber fineness of the modacrylic fiber is not particularly limited, but from the viewpoint of spinnability, processability, texture and strength when made into woven and/or knitted fabrics, it is preferably 1 to 20 dtex, more preferably 1.5 to 20 dtex. It is 15 dtex. Further, the fiber length of the modacrylic fiber is not particularly limited, but from the viewpoint of spinnability and processability, it is preferably 38 to 127 mm, more preferably 38 to 76 mm. In this specification, the single fiber fineness of the fiber can be measured based on JIS L 1015:2021.
• the strength of modacrylic fiber is not particularly limited, but from the viewpoint of spinnability and processability, it is preferably 1.0 to 4.0 cN/dtex, more preferably 1.5 to 3.0 cN/dtex. . Further, the elongation of the modacrylic fiber is not particularly limited, but from the viewpoint of spinnability and processability, it is preferably 20 to 35%, more preferably 20 to 25%. In this specification, the strength and elongation of fibers can be measured based on JIS L 1015:2021.
• the spinning dope is wet-spun in the same manner as for general modacrylic fibers, except that compounds containing tin and zinc and other additives are added as necessary to the spinning dope in which the modacrylic polymer is dissolved.
• Modacrylic fibers can be produced that include compounds containing tin and zinc within the fiber.
• the spinning stock solution contains 2.5 to 11.0 parts of a compound containing tin and zinc per 100 parts by mass of the modacrylic polymer, from the viewpoint of flame retardancy, productivity, processability, and fiber physical properties of modacrylic fibers.
• it contains 3.0 to 10.5 parts by mass, even more preferably 3.2 to 10.0 parts by mass, and even more preferably 3.8 to 9.8 parts by mass.
• the spinning dope may contain other additives other than compounds containing tin and zinc within a range that does not impede the effects of the present invention, for example, 5 parts by mass or less, 3 parts by mass or less, based on 100 parts by mass of the modacrylic polymer. Alternatively, it may be included in an amount of 1 part by mass or less.
• the modacrylic fiber is a solution-colored fiber. Dyeing in the fabric state is no longer necessary, reducing environmental impact and fabric costs. After adding a tin- and zinc-containing compound and a coloring agent to the spinning dope, the resulting spinning dope can be spun to obtain a dot-colored fiber.
• the coloring agent include organic pigments, inorganic pigments, and dyes.
• Cellulose fiber is a general term for fibers derived from cellulose, and may be natural cellulose fiber, semi-synthetic cellulose fiber, or regenerated cellulose fiber.
• natural cellulose fibers include cotton, hemp (including flax, ramie, jute, kenaf, hemp, Manila hemp, sisal hemp, and New Zealand hemp), kapok, banana, and coconut.
• semi-synthetic cellulose fibers include acetate and triacetate.
• Examples of regenerated cellulose fibers include rayon, cupro, and lyocell. These cellulose fibers may be used alone or in combination of two or more.
• the cellulose fiber may contain a flame retardant.
• a flame retardant a compound containing tin and zinc may be included, but it is desirable to include a phosphorus-based flame retardant.
• the cellulose-based fiber preferably contains one or more selected from the group consisting of natural cellulose fibers and regenerated cellulose fibers, and preferably includes one or more selected from the group consisting of lyocell, flame-retardant lyocell, rayon, and flame-retardant rayon. It is more preferable to include one or more selected from the following, and even more preferably to include lyocell.
• the flame-retardant Lyocell contains a phosphorus-based flame retardant.
• the phosphorus flame retardant is not particularly limited, and examples thereof include phosphate ester compounds, halogen phosphate ester compounds, condensed phosphate ester compounds, polyphosphate compounds, and polyphosphate ester compounds.
• Flame-retardant Lyocell is not particularly limited, but for example, from the viewpoint of improving flame retardancy, it preferably contains 0.5% by mass or more of phosphorus derived from a phosphorus-based flame retardant, and more preferably contains 0.8% by mass or more. preferable.
• the flame-retardant Lyocell preferably contains 10% by mass or less of phosphorus derived from a phosphorus-based flame retardant.
• the flame-retardant rayon contains a phosphorus-based flame retardant.
• the phosphorus flame retardant is not particularly limited, and examples include phosphoric ester compounds, halogen phosphoric ester compounds, condensed phosphoric ester compounds, polyphosphate compounds, and polyphosphoric ester compounds.
• the flame-retardant rayon fiber is not particularly limited, but for example, from the viewpoint of improving flame retardancy, it preferably contains 0.5% by mass or more of phosphorus derived from a phosphorus-based flame retardant, and preferably contains 0.8% by mass or more of phosphorus. More preferred.
• the flame-retardant rayon fiber preferably contains 10% by mass or less of phosphorus derived from a phosphorus-based flame retardant.
• the content of phosphorus in the fiber can be measured using a fluorescent X-ray analysis method.
• the single fiber fineness of the cellulose fiber is not particularly limited, but from the viewpoint of strength, it is preferably 1 to 20 dtex, more preferably 1.5 to 15 dtex. Further, the fiber length of the cellulose fiber is not particularly limited, but from the viewpoint of strength, it is preferably 38 to 127 mm, more preferably 38 to 76 mm.
• the aramid fibers may be para-aramid fibers or meta-aramid fibers.
• the single fiber fineness of the aramid fiber is not particularly limited, but from the viewpoint of strength, it is preferably 1 to 20 dtex, more preferably 1.5 to 15 dtex.
• the fiber length of the aramid fiber is not particularly limited, but from the viewpoint of strength, it is preferably 38 to 127 mm, more preferably 38 to 76 mm.
• the flame retardant fabric comprises 30-60% by weight modacrylic fibers, 20-50% by weight cellulosic fibers, 10-20% by weight aramid fibers, and 35-60% by weight modacrylic fibers. It preferably contains 55% by mass, 25 to 50% by mass of cellulose fibers, and 10 to 18% by mass of aramid fibers, 38 to 53% by mass of modacrylic fibers, 30 to 50% by mass of cellulose fibers, and aramid fibers. It is more preferable to contain 10 to 18% by mass. When the content of modacrylic fiber is low, flame retardancy is poor.
• the flame-retardant fabric may contain compounds containing tin and zinc in an amount of 1.4 to 5.0% by mass, but 1.6 to 4.9% by mass, 1.8 to 4.8% by mass, and 2.0% by mass. It is more preferable to contain up to 4.7% by mass, or 2.5 to 4.5% by mass.
• the flame-retardant fabric of one or more preferred embodiments of the present invention contains 30 to 60% by mass of modacrylic fibers, Lyocell, flame-retardant Lyocell, rayon, and It preferably contains 20 to 50% by mass of one or more regenerated cellulose fibers selected from the group consisting of flame rayon, 10 to 20 mass% of para-aramid fibers, 35 to 55 mass% of modacrylic fibers, Lyocell, flame-retardant Lyocell, Preferably, it contains 25 to 50% by mass of one or more regenerated cellulose fibers selected from the group consisting of rayon and flame-retardant rayon, 10 to 18% by mass of para-aramid fibers, 38 to 53% by mass of modacrylic fibers, Lyocell, non-flammable rayon, etc.
• the modacrylic fiber contains compounds containing tin and zinc in an amount of 2.4 to 10.4% by mass, 2.5 to 10.2% by mass, 2.8 to 10.0% by mass, and 3.0 to 10% by mass. It is preferable to contain 10.0% by mass, 3.5 to 9.8% by mass, 3.5 to 9.6% by mass, 3.5 to 9.4% by mass, or 3.5 to 9.2% by mass. .
• the flame-retardant fabric of one or more preferred embodiments of the present invention contains 30 to 60 mass% modacrylic fiber, 20 to 50 mass% Lyocell, and It is preferable to contain 10 to 20% by mass of para-aramid fibers, more preferably 35 to 55% by mass of modacrylic fibers, 25 to 50% by mass of lyocell, and 10 to 18% by mass of para-aramid fibers, and more preferably 38 to 55% by mass of modacrylic fibers. More preferably, the fiber contains 53% by mass, 30 to 50% by mass of Lyocell, and 10 to 18% by mass of para-aramid fiber.
• the modacrylic fiber contains compounds containing tin and zinc in an amount of 2.4 to 10.4% by mass, 2.5 to 10.2% by mass, 2.8 to 10.0% by mass, and 3.0 to 10% by mass. It is preferable to contain 10.0% by mass, 3.5 to 9.8% by mass, 3.5 to 9.6% by mass, 3.5 to 9.4% by mass, or 3.5 to 9.2% by mass. .
• the flame-retardant fabric may contain other fibers in addition to modacrylic fibers, cellulose fibers, and aramid fibers within a range that does not impede the objects and effects of the present invention.
• other fibers include conductive fibers, heat-resistant fibers, and high-strength, high-elastic fibers.
• conductive fibers include metal fibers, metal-plated fibers, copper compound-coated fibers, and conductive substance-added fibers
• heat-resistant fibers include polyoxadiazole fibers, polyimide fibers, polyamide-imide fibers, and high-strength, high-elastic fibers.
• examples include nylon fibers, polyester fibers, polyarylate fibers, and the like.
• the flame-retardant fabric may contain other fibers in an amount of 10% by mass or less, 8% by mass or less, or 1% by mass or less in the entire fabric.
• the single fiber fineness of the other fibers is not particularly limited, but from the viewpoint of strength, it is preferably 1 to 20 dtex, more preferably 1.5 to 15 dtex. Further, the fiber length of the other fibers is not particularly limited, but from the viewpoint of strength, it is preferably 38 to 127 mm, more preferably 38 to 76 mm.
• the form of the flame-retardant fabric is not particularly limited, and examples thereof include woven fabrics and knitted fabrics.
• the structure of the fabric is not particularly limited, and may be a three-dimensional structure such as a plain weave, a twill weave, or a satin weave, or a patterned fabric using a special loom such as a dobby or a jaguar.
• the structure of the knitted fabric is not particularly limited, and may be circular knitting, flat knitting, or warp knitting. From the viewpoint of excellent durability, the flame-retardant fabric is preferably a woven fabric, and more preferably a twill woven fabric.
• the flame-retardant fabric is not particularly limited, but from the viewpoint of texture and flame retardancy, preferably has a basis weight of 200 to 400 g/m 2 , more preferably 220 to 380 g/m 2 , and even more preferably It is 250 to 350 g/m 2 .
• the flame retardant fabric has excellent flame retardancy and preferably has a char length of 75 mm or less, preferably 73 mm or less, as measured by a flammability test based on ASTM D6413. It is more preferable that the length be 71 mm or less.
• the carbonization length of the flame-retardant fabric is different in two directions, the vertical direction and the horizontal direction, the maximum value is preferably 75 mm or less, more preferably 73 mm or less, and even more preferably 71 mm or less.
• the flame retardant fabric preferably has excellent flame retardancy and has a residual time of 10.0 seconds or less as measured by a flammability test based on ASTM D6413. , more preferably 9.5 seconds or less, and even more preferably 9.0 seconds or less.
• the maximum value is preferably 10.0 seconds or less, more preferably 9.5 seconds or less, and 9. More preferably, the time is 0 seconds or less.
• flame-retardant fabrics can be suitably used in workwear that requires flame retardancy.
• workwear can be manufactured using the flame retardant fabric of one or more embodiments of the invention by known sewing methods.
• the flame retardant fabric has excellent flame retardant properties so that the workwear also has excellent flame retardant properties.
• the flame-retardant fabric has an excellent texture even after repeated washing, the work clothes maintain their flame retardancy and texture even after repeated washing.
• the workwear may be used as workwear for any work requiring flame retardancy.
• Examples include, but are not limited to, protective clothing worn by firefighters (firefighting suits), protective clothing worn at work sites where fires can occur, such as petroleum, petrochemical, coal mines, electric power, and welding, and dust explosions such as metal processing. It can be used as work clothes to be worn at work sites where fires can occur, such as petroleum, petrochemical, coal mines, electric power, and welding, and dust explosions such as metal processing. It can be used as work clothes to be worn at work sites where
• ⁇ Flame retardant content The content of flame retardant (a compound containing tin and zinc) in modacrylic fibers or fabrics was measured by a fluorescent X-ray analysis method using a fluorescent X-ray device ("SEA2210A" manufactured by SII Nano Technology). Using a standard sample with a known tin content, the fluorescent X-ray intensity of tin was measured in advance to create a calibration curve. Next, the tin content in the modacrylic fiber was determined by measuring the fluorescent X-ray intensity of tin in the modacrylic fiber and comparing it with a calibration curve. Next, the content of compounds containing tin and zinc in the modacrylic fibers or in the fabric was calculated based on the tin content.
• ⁇ Manufacture example 1> A modacrylic polymer consisting of 51% by mass of acrylonitrile, 48% by mass of vinylidene chloride, and 1% by mass of sodium p-styrene sulfonate was dissolved in dimethyl sulfoxide so that the concentration of the modacrylic polymer was 30% by mass. To the obtained modacrylic polymer solution, 4 parts by mass of antimony trioxide (Sb 2 O 3 , manufactured by Nippon Seiko Co., Ltd., product name "PATOX-M”) was added to 100 parts by mass of the modacrylic polymer, and spinning was carried out. It was used as a stock solution.
• SB 2 O 3 antimony trioxide
• the above-mentioned antimony trioxide was added in advance to dimethyl sulfoxide in an amount of 30% by mass, and was uniformly dispersed for use as a prepared dispersion.
• the average particle diameter D50 of antimony trioxide measured by laser diffraction/scattering method was 1.0 ⁇ m.
• the obtained spinning stock solution was extruded into a 50% by mass dimethyl sulfoxide aqueous solution to solidify it, then washed with water and dried at 120°C, and after drying, it was tripled in size.
• a modacrylic fiber was obtained by further performing a heat treatment at 145° C. for 5 minutes.
• the obtained modacrylic fiber of Production Example 1 had a single fiber fineness of 1.7 dtex and a cut length of 51 mm.
• Modacrylic fibers were produced in the same manner as in Production Example 1, except that the amount of antimony trioxide added was 8 parts by mass based on 100 parts by mass of the modacrylic polymer.
• the obtained modacrylic fiber of Production Example 2 had a single fiber fineness of 1.6 dtex and a cut length of 51 mm.
• Modacrylic fibers were produced in the same manner as in Production Example 1, except that the amount of antimony trioxide added was 9 parts by mass based on 100 parts by mass of the modacrylic polymer.
• the obtained modacrylic fiber of Production Example 3 had a single fiber fineness of 1.7 dtex and a cut length of 51 mm.
• Zinc hexahydroxide (ZnSn(OH) 6 , manufactured by SCL Italia. Spa, product name "Zinflam (registered trademark) ZHS”) was used in place of antimony trioxide, and the amount of zinc hexahydroxide added was changed from that of modacrylic polymer.
• Modacrylic fibers were produced in the same manner as in Production Example 1, except that the amount was 2 parts by mass relative to 100 parts by mass.
• the average particle diameter D50 of tin hexahydroxide measured by a laser diffraction/scattering method was 1.2 ⁇ m.
• the obtained modacrylic fiber of Production Example 4 had a single fiber fineness of 1.7 dtex and a cut length of 51 mm.
• a modacrylic fiber was produced in the same manner as in Production Example 4, except that the amount of tin zinc hexahydroxide added was 4 parts by mass based on 100 parts by mass of the modacrylic polymer.
• the obtained modacrylic fiber of Production Example 5 had a single fiber fineness of 1.6 dtex and a cut length of 51 mm.
• a modacrylic fiber was produced in the same manner as in Production Example 4, except that the amount of tin zinc hexahydroxide added was 6 parts by mass based on 100 parts by mass of the modacrylic polymer.
• the obtained modacrylic fiber of Production Example 6 had a single fiber fineness of 2.0 dtex and a cut length of 51 mm.
• a modacrylic fiber was produced in the same manner as in Production Example 4, except that the amount of tin zinc hexahydroxide added was 7 parts by mass based on 100 parts by mass of the modacrylic polymer.
• the obtained modacrylic fiber of Production Example 7 had a single fiber fineness of 1.7 dtex and a cut length of 51 mm.
• a modacrylic fiber was produced in the same manner as Production Example 4, except that the amount of tin zinc hexahydroxide added was 8 parts by mass based on 100 parts by mass of the modacrylic polymer.
• the obtained modacrylic fiber of Production Example 8 had a single fiber fineness of 1.7 dtex and a cut length of 51 mm.
• a modacrylic fiber was produced in the same manner as in Production Example 4, except that the amount of tin zinc hexahydroxide added was 9 parts by mass based on 100 parts by mass of the modacrylic polymer.
• the obtained modacrylic fiber of Production Example 9 had a single fiber fineness of 1.8 dtex and a cut length of 51 mm.
• a modacrylic fiber was produced in the same manner as in Production Example 4, except that the amount of tin zinc hexahydroxide added was 10 parts by mass based on 100 parts by mass of the modacrylic polymer.
• the obtained modacrylic fiber of Production Example 10 had a single fiber fineness of 1.8 dtex and a cut length of 51 mm.
• ⁇ Manufacture example 11> In place of antimony trioxide, stannic oxide (SnO 2 , manufactured by Showa Kako Co., Ltd.) and zinc borate (ZnB 6 O 11.3.5H 2 O, manufactured by Sakai Chemical Co., Ltd.) were used, and the amounts of each added were determined. Modacrylic fibers were produced in the same manner as in Production Example 1, except that the total addition amount was 8 parts by mass, which was 4 parts by mass based on 100 parts by mass of the modacrylic polymer.
• the average particle diameter D50 of stannic oxide measured by a laser diffraction/scattering method in a dispersion of stannic oxide is 1.7 ⁇ m, and it is measured by a laser diffraction/scattering method in a dispersion of zinc borate.
• the average particle diameter D50 of the zinc borate obtained was 1.5 ⁇ m.
• the obtained modacrylic fiber of Production Example 11 had a single fiber fineness of 1.9 dtex and a cut length of 51 mm.
• a sliver was produced using Next, using this sliver, a roving spinning machine FL200 manufactured by Toyota Industries Corporation is used to spin roving yarn, and a high speed spinning machine UA37 manufactured by Howa Kogyo Co., Ltd. is used to spin roving yarn into ring-spun yarn with a count of 12.5/1 to 13.5/1. was created. Using this spun yarn, a woven fabric with a 2/1 twill structure was produced. The number of implants and the area weight were as shown in Table 2 below.
• the fiber composition of the fabric is the same as in Example 8, and the modacrylic fiber used in Example 8 In Examples 5 to 7, which used modacrylic fibers with a lower content of tin zinc hexahydroxide, almost no static electricity was generated when the card was passed through, similar to Example 8, and the productivity and processability of the fabrics were good. It is assumed that.
• the fabric of the example had a residual flame time of 10 seconds or less when evaluated by a combustion test method based on ASTM D6413-99, and the flame retardance indicated by the residual flame time was also good.
• the blending amount of the flame retardant in the modacrylic fiber and the blending ratio of the modacrylic fiber, cellulose fiber, and aramid fiber are the same as in Example 1, but the fabric of Comparative Example 1 using antimony trioxide as the flame retardant is the same as that of Example 1. Compared to fabric No. 1, the char length evaluated by the combustion test method based on ASTM D6413-99 was longer, and the flame retardance was inferior.
• the blending amount of the flame retardant in the modacrylic fiber and the blending ratio of the modacrylic fiber, cellulose fiber, and aramid fiber are the same as in Examples 3 and 8, respectively, but Comparative Example 2 using antimony trioxide as the flame retardant
• the fabrics of Examples 3 and 4 have longer char lengths than the fabrics of Examples 3 and 8, as evaluated by the combustion test method based on ASTM D6413-99, and are inferior in flame retardancy.
• flame retardancy was evaluated using a flame test method based on ASTM D6413-99.
• [1] Contains 30 to 60% by mass of modacrylic fibers, 20 to 50% by mass of cellulose fibers, and 10 to 20% by mass of aramid fibers, and contains 1.4 to 1.4% of compounds containing tin and zinc based on the total mass of the fabric.
• a flame retardant fabric containing 5.0% by mass.
• the cellulose-based fiber includes one or more selected from the group consisting of lyocell, flame-retardant lyocell, rayon, and flame-retardant rayon.

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