JP2020016003A - Flame-retardant cloth and laminated flame-retardant cloth and fiber product - Google Patents

Abstract

To provide a flame-retardant cloth and a laminated flame-retardant cloth and a fiber product which exhibit uneven structure on both surfaces of the cloth when exposed by flame or heat, and have flame retardancy and heat shielding property.SOLUTION: There is provided a flame-retardant cloth comprising a yarn 1 including an aramid fiber and a yarn 2 including an aramid fiber, wherein the cloth comprises: a region A where the yarns 1 are exposed at the front surface of the cloth and the yarns 2 are exposed at the back surface of the cloth; and a region B where the yarns 2 are exposed at the front surface of the cloth and the yarns 1 are exposed at the back surface of the cloth.SELECTED DRAWING: Figure 2

Description

  TECHNICAL FIELD The present invention relates to a flame-retardant fabric, a laminated flame-retardant fabric, and a fiber product, which exhibit uneven structures on both surfaces of the fabric when exposed to a flame or heat and have flame retardancy and heat shielding properties.

  Conventionally, various cloths have been proposed as cloths used for protective clothing such as firefighting clothing. For example, Patent Literature 1 proposes a multi-layer structure fabric in which an outermost layer has a flame-retardant and heat-insulating function, an intermediate layer has a moisture-permeable and waterproofing function, and an innermost layer has a heat-insulating function. Patent Document 2 proposes a fabric having a double-woven structure. However, it was not yet satisfactory in terms of achieving both flame retardancy and heat shielding.

  In addition, Patent Document 3 proposes a flame-retardant fabric that exhibits a concavo-convex structure when exposed to flame or heat, but it has not been sufficient yet.

JP 2010-255129 A WO 2007/018808 pamphlet WO 2017/175632 pamphlet

  The present invention has been made in view of the above background, and an object of the present invention is to provide a flame-retardant fabric, which has an uneven structure on both sides of the fabric when exposed to a flame or heat and has flame retardancy and heat shielding properties. And laminated flame retardant fabrics and textiles.

  The present inventors have conducted intensive studies to achieve the above object, and as a result of skillfully devising the structure of the yarn and the fabric constituting the flame-retardant fabric, both sides of the fabric when exposed to flame or heat are examined. The present inventor has found that an uneven structure is developed, and has made extensive studies to complete the present invention.

  Thus, according to the present invention, "a flame-retardant fabric including a yarn 1 containing aramid fiber and a yarn 2 containing aramid fiber, wherein the yarn 1 is exposed on the surface of the fabric and the yarn 2 is formed on the back surface of the fabric A flame-retardant fabric having an exposed area A and an area B in which the yarn 2 is exposed on the surface of the fabric and the yarn 1 is exposed on the back surface of the fabric. "

At that time, it is preferable that the yarn 1 and / or the yarn 2 is a spun yarn. Preferably, the yarn 1 contains 50% by weight or more of para-aramid fiber based on the weight of the yarn, and the yarn 2 contains 30% or less of para-aramid fiber. Further, the difference in the heat shrinkage between the yarn 1 and the yarn 2 is preferably 5% or more. Further, it is preferable that the region A and the region B are arranged in a pattern on the front surface or the back surface of the cloth. Further, it is preferable that the thickness D of the flame-retardant cloth before heat exposure is 2.0 mm or less. Further, it is preferable that the thickness D of the flame retardant fabric and the thickness d of the fabric after heat exposure have the following relationship.
d-D> 1.0mm
Further, according to the present invention, there is provided a laminated flame-retardant fabric obtained by laminating another fabric on the above-mentioned flame-retardant fabric and laminating three or more layers. In that case, it is preferable that the flame-retardant dough is arranged in two or more layers in the laminated dough. Further, in the laminated dough, the total heat loss (THL) specified by ASTM F 1868 Part C is 300 W / m ² or more, and the time HTI24 until the sensor temperature increases by 24 ° C. in the radiant heat test specified in ISO9151. Is preferably 13 seconds or more. In the laminated fabric, it is preferable that the thickness E of the whole laminated fabric and the thickness e of the laminated fabric after heat exposure have the following relationship.
ee> 1.0mm
Further, the laminated fabric preferably includes a fabric in which a waterproof and moisture-permeable film is laminated on one side.

  Further, according to the present invention, the flame-retardant fabric or the laminated flame-retardant fabric is used, and is composed of a protective suit, a fire-fighting fire-fighting suit, a fire-fighting suit, a rescue suit, workwear, a police uniform, a SDF uniform, and a military uniform. Any fiber product selected from the group is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the flame-retardant fabric, the laminated flame-retardant fabric, and the fiber product which exhibit uneven structure on both surfaces of the fabric when exposed by a flame or heat and have flame retardancy and heat shielding properties are obtained.

FIG. 3 is a weave organization diagram that can be employed in the fabric of the present invention. In Example 1, it is a figure which shows typically a mode that the uneven | corrugated structure is expressed on both surfaces of a cloth | dough when it is exposed by flame or heat.

  Hereinafter, embodiments of the present invention will be described in detail. First, the flame-retardant fabric of the present invention includes a yarn 1 containing aramid fiber and a yarn 2 containing aramid fiber. Such yarn 1 and yarn 2 are not the same.

  Here, in the yarn 1 and / or the yarn 2, the shape of the yarn may be a long fiber, but a spun yarn is preferable for arbitrarily adjusting the composition of the fiber contained in the yarn. At this time, it is preferable to use air jet spinning or ring spinning as a spinning method.

  The aramid fibers (wholly aromatic polyamide fibers) include para-aramid fibers and meta-aramid fibers. The yarn 1 contains the para-aramid fiber in an amount of 50% by weight or more based on the weight of the yarn, and the yarn 2 is para-aramid fiber. It is preferable to contain 30% or less of fibers.

  In addition, meta-aramid fibers usually have characteristics of high heat resistance and high heat shrinkage. On the other hand, para-aramid fibers usually have the characteristics of high heat resistance, low heat shrinkage, and high strength.

  Here, the meta-aramid fiber is a fiber made of a polymer in which 85 mol% or more of the repeating unit is m-phenylene isophthalamide. Such a meta-aramid (a wholly aromatic polyamide) may be a copolymer containing the third component in a range of less than 15 mol%.

  Such a meta-aramid (a wholly aromatic polyamide) can be produced by a conventionally known interfacial polymerization method, and the degree of polymerization of the polymer is 0.5 g / 100 ml of N-methyl-2-ml. Those having an intrinsic viscosity (IV) of 1.3 to 1.9 dl / g measured with a pyrrolidone solution are preferably used.

  The meta-aramid (wholly aromatic polyamide) may contain an onium salt of alkylbenzenesulfonic acid. Examples of the alkylbenzenesulfonic acid onium salts include hexylbenzenesulfonic acid tetrabutylphosphonium salt, hexylbenzenesulfonic acid tributylbenzylphosphonium salt, dodecylbenzenesulfonic acid tetraphenylphosphonium salt, and dodecylbenzenesulfonic acid tributyltetradecylphosphonate. Compounds such as a sodium salt, tetrabutylphosphonium dodecylbenzenesulfonate, and tributylbenzylammonium dodecylbenzenesulfonate are preferably exemplified. Above all, tetrabutylphosphonium dodecylbenzenesulfonate or tributylbenzylammonium dodecylbenzenesulfonate is easily available, has good thermal stability, and has high solubility in N-methyl-2-pyrrolidone. It is preferably exemplified.

  The content ratio of the above-mentioned alkylbenzenesulfonic acid onium salt is 2.5 mol% or more (preferably 3.0 to 7.0 mol) with respect to poly-m-phenylene isophthalamide in order to obtain a sufficient effect of improving dyeability. %) Is preferred.

  As a method of mixing poly-m-phenylene isophthalamide and onium salt of alkylbenzenesulfonic acid, a method of mixing and dissolving poly-m-phenyleneisophthalamide in a solvent and dissolving the onium salt of alkylbenzenesulfonic acid therein is used. Etc. are used, and any of them may be used. The dope thus obtained is formed into fibers by a conventionally known method.

The polymer used for the meta-aramid fiber has a main structure of a repeating structure in an aromatic polyamide skeleton containing a repeating structural unit represented by the following formula (1) for the purpose of improving dyeing resistance and discoloration resistance. An aromatic diamine component or an aromatic dicarboxylic acid halide component different from the unit may be copolymerized as the third component so as to be 1 to 10 mol% with respect to the total amount of the repeating structural units of the aromatic polyamide.
-(NH-Ar1-NH-CO-Ar1-CO)-... Formula (1)
Here, Ar1 is a divalent aromatic group having a binding group other than the meta-coordination or parallel axis direction.

It is also possible to copolymerize as the third component. Specific examples of the aromatic diamine represented by the formulas (2) and (3) include, for example, p-phenylenediamine, chlorophenylenediamine, methylphenylenediamine, Acetylphenylenediamine, aminoanisidine, benzidine, bis (aminophenyl) ether, bis (aminophenyl) sulfone, diaminobenzanilide, diaminoazobenzene and the like can be mentioned. Specific examples of the aromatic dicarboxylic acid dichloride represented by the formulas (4) and (5) include, for example, terephthalic acid chloride, 1,4-naphthalenedicarboxylic acid chloride, 2,6-naphthalenedicarboxylic acid chloride, 4,4 '-Biphenyldicarboxylic acid chloride, 5-chloroisophthalic acid chloride, 5-methoxyisophthalic acid chloride, bis (chlorocarbonylphenyl) ether and the like.
H ₂ N—Ar ₂ —NH ₂ Formula (2)
_{H 2 N-Ar2-Y-} Ar2-NH 2 ··· formula (3)
XOC-Ar3-COX Formula (4)
XOC-Ar3-Y-Ar3-COX Formula (5)
Here, Ar2 is a divalent aromatic group different from Ar1, Ar3 is a divalent aromatic group different from Ar1, Y is at least one atom selected from the group consisting of an oxygen atom, a sulfur atom, and an alkylene group. Or X is a functional group, and X represents a halogen atom.

  Further, the crystallinity of the meta-aramid fiber may be 5 to 35% in that the dye has a good exhaustion property and is easily adjusted to a target color even with a smaller amount of dye or weak dyeing conditions. preferable. Further, the content is more preferably from 15 to 25% from the viewpoint that the uneven distribution of the dye on the surface hardly occurs, the discoloration resistance is high, and the dimensional stability required for practical use can be secured.

  The residual solvent amount of the meta-aramid fiber is 0.1% by weight or less, because the excellent flame retardant performance of the meta-aramid fiber is not impaired, and the surface uneven distribution of the dye hardly occurs and the discoloration resistance is high. Preferably, there is.

  The meta-aramid fiber can be produced by the following method, and in particular, the crystallinity and the amount of the remaining solvent can be set in the above-mentioned ranges by the method described later.

  The method for polymerizing the meta-aramid (wholly aromatic polyamide) polymer is not particularly limited, and examples thereof include solutions described in JP-B-35-14399, U.S. Pat. No. 3,360,595, and JP-B-47-10863. A polymerization method or an interfacial polymerization method may be used.

  The spinning solution is not particularly limited, but an amide-based solvent solution containing an aromatic copolyamide polymer obtained by the above solution polymerization or interfacial polymerization may be used, or the polymer may be converted from the polymerization solution. It may be used after isolation and dissolution in an amide solvent.

  Examples of the amide-based solvent used herein include N, N-dimethylformamide, N, N-dimethylacetamide, N-methyl-2-pyrrolidone, dimethylsulfoxide, and the like. In particular, N, N-dimethylacetamide Is preferred.

The copolymerized aromatic polyamide polymer solution obtained as described above is further stabilized by containing an alkali metal salt or an alkaline earth metal salt, and can be used at a higher concentration and at a lower temperature, which is preferable. Preferably, the content of the alkali metal salt and alkaline earth metal salt is 1% by weight or less (more preferably 0.1% by weight or less) based on the total weight of the polymer solution.
In the spinning / coagulation step, the spinning solution (meta-aramid polymer solution) obtained above is spun into a coagulation solution and coagulated.

The spinning device is not particularly limited, and a conventionally known wet spinning device can be used. Further, as long as the spinning can be performed stably, the number of spinning holes, arrangement state, hole shape, etc. of the spinneret need not be particularly limited. For example, the number of spinning holes is 1,000 to 30,000, and the spinning hole diameter is 0.05. A multi-hole spinneret for staple fibers (short fibers) of up to 0.2 mm may be used.
The temperature of the spinning solution (meta-aramid polymer solution) at the time of spinning from the spinneret is suitably in the range of 20 to 90 ° C.

  As a coagulation bath used for obtaining the fiber, an aqueous solution of an amide-based solvent, preferably having an NMP concentration of 45 to 60% by mass, containing substantially no inorganic salt, is used at a bath solution temperature of 10 to 50 ° C. Used. If the concentration of the amide solvent (preferably NMP) is less than 45% by mass, the skin has a thick structure, the washing efficiency in the washing step is reduced, and it may be difficult to reduce the residual solvent amount of the fiber. . On the other hand, when the concentration of the amide-based solvent (preferably NMP) exceeds 60% by mass, uniform coagulation cannot be performed even to the inside of the fiber. May be difficult. The time for immersing the fibers in the coagulation bath is suitably in the range of 0.1 to 30 seconds.

Subsequently, an amide-based solvent, preferably an aqueous solution having an NMP concentration of 45 to 60% by mass, in a plastic stretching bath in which the temperature of the bath solution is in the range of 10 to 50 ° C., at a stretching ratio of 3 to 4 times. Perform stretching. After the stretching, washing is sufficiently performed through an aqueous solution having an NMP concentration of 20 to 40% by mass at 10 to 30 ° C, and subsequently to a warm water bath at 50 to 70 ° C.
The washed fiber is subjected to a dry heat treatment at a temperature of 270 to 290 ° C. to obtain a meta-aramid fiber satisfying the above ranges of crystallinity and residual solvent amount.

In the meta-aramid fiber, the form of the fiber may be a long fiber (multifilament) or a short fiber. In particular, short fibers having a fiber length of 25 to 200 mm are preferable for blending with other fibers. The single fiber fineness is preferably in the range of 1 to 5 dtex.
Examples of commercially available meta-aramid fibers include Conex (trade name), Conex (trade name) Neo, and Nomex (trade name).

  The para-aramid fiber is a fiber made of a polyamide having an aromatic ring in the main chain, and may be poly-p-phenyleneterephthalamide (PPTA) or a copolymer type copolyparaphenylene-3,4 ′. Oxydiphenylene terephthalamide (PPODPA) may be used. Examples of commercially available para-aramid fibers include Technola (trade name), Kevlar (trade name), and Twaron (trade name).

  Further, in the yarn 1 and the yarn 2, it is preferable that the yarn is composed of only the para-aramid fiber and / or the meta-aramid fiber. As the fiber which can be mixed and used with the para-aramid fiber and the meta-aramid fiber, polybenzimidazole is used. Fiber, polyimide fiber, polyamide imide fiber, polyether imide fiber, polyarylate fiber, polyparaphenylene benzobisoxazole fiber, novoloid fiber, flame retardant acrylic fiber, polyclar fiber, flame retardant polyester fiber, flame retardant cotton fiber, flame retardant rayon fiber , Flame-retardant vinylon fiber and flame-retardant wool fiber.

Further, it is preferable that the difference in the heat shrinkage between the yarn 1 and the yarn 2 is 10% or more. However, the term "heat shrinkage" as used in the present invention refers to the shrinkage of the yarn length before and after the heat treatment when the dry heat treatment is performed at 450 ° C. for 5 minutes. Among the yarns 1 and 2, the difference HAB in dry heat shrinkage between yarn A having a large heat shrinkage and yarn B having a small heat shrinkage is 5% or more (preferably 10% or more, more preferably 17% or more). ４０40%). When the difference HAB in the dry heat shrinkage is smaller than 10%, the fabric may not have a concavo-convex structure when exposed to a flame or heat.
Dry heat shrinkage (%) = ((Length before test (mm) −Length after test (mm)) / (Length before test (mm)) × 100
Heat shrinkage difference HAB (%) = (dry heat shrinkage of yarn A (%))-(dry heat shrinkage of yarn B (%))

  The yarn 1 and the yarn 2 (the yarn A having a large heat shrinkage and the yarn B having a small heat shrinkage) both contain aramid fibers (wholly aromatic polyamide fibers) in terms of flame retardancy. It is more preferable that both are composed of only aramid fibers (wholly aromatic polyamide fibers). In particular, it is preferable that the yarn A having a large heat shrinkage contains 50 to 98% by weight of the meta-aramid fiber and 2 to 50% by weight of the para-aramid fiber. In particular, it is preferable that the yarn A having a large heat shrinkage contains 30% or less of para-aramid fiber. Further, the yarn B having a small heat shrinkage ratio is 50% by weight or more based on the weight of the para-aramid fiber (more preferably 50 to 100% by weight of the para-aramid fiber, particularly preferably 80 to 100% by weight of the para-aramid fiber). % By weight). Further, the yarn B having a small heat shrinkage preferably contains 0 to 50% by weight of a meta-aramid fiber.

  The flame-retardant dough of the present invention has a region A in which the yarn 1 is exposed on the surface of the dough and the yarn 2 is exposed on the back of the dough, the yarn 2 is exposed on the surface of the dough, and the yarn 1 is formed on the back of the dough. And an exposed region B.

  Here, it is preferable that the region A and the region B are arranged in a pattern. For example, it is preferable that the regions A and the regions B are alternately arranged in a stripe shape or a checkered lattice shape. The switching interval (the width of one stripe or the length of one side of one checkerboard lattice) is preferably 2 to 100 mm (more preferably 4 to 60 mm, more preferably 6 to 50 mm).

In the fabric of the present invention, the basis weight is preferably 300 g / m ² or less (more preferably 50 to 300 g / m ² ). If the basis weight is larger than 300 g / m ² , the uneven structure may not be developed due to its own weight.

  In the fabric of the present invention, the fabric structure is not limited, and may be a woven fabric or a knit such as a warp knit or a circular knit (weft knit). Of these, woven fabrics are preferred. As the woven structure, the structure shown in FIG. 1 is preferable.

  The method for producing the fabric is not particularly limited, and the fabric can be knitted and woven by a conventional method using the yarn 1 and the yarn 2 described above. In this case, preferred looms include shuttle looms, rapier looms, air jet looms and the like. Examples of the knitting machine include a tricot knitting machine and a circular knitting machine.

In the thus obtained flame retardant fabric, the thickness D of the flame retardant fabric before heat exposure is preferably 2.0 mm or less. Further, it is preferable that the thickness D of the flame retardant fabric and the thickness d of the fabric after heat exposure have the following relationship.
d-D> 1.0mm
Further, according to the present invention, there is provided a laminated flame-retardant fabric which is obtained by laminating another fabric on the above-described flame-retardant fabric and comprising three or more layers of fabrics. At this time, it is preferable that the flame-retardant fabric is arranged in a layer other than the outermost layer. In the laminated fabric, it is preferable that the flame-retardant fabric is arranged in two or more layers.

Here, in the laminated fabric, the total heat loss (THL) specified by ASTM F 1868 Part C is 300 W / m ² or more, and the time until the sensor temperature rises by 24 ° C. in the radiation heat test specified in ISO9151. Preferably, the HTI 24 is 13 seconds or longer.
In the laminated fabric, it is preferable that the thickness E of the whole laminated fabric and the thickness e of the laminated fabric after heat exposure have the following relationship.
ee> 1.0mm

  The outermost layer is preferably made of a fabric composed of meta-aramid fibers and para-aramid fibers. As the type of the fabric, a woven or knitted fabric and a non-woven fabric are used. Is preferred. Further, the meta-aramid fiber and the para-aramid fiber can be used in the form of a filament, a mixed fiber, a spun yarn, and the like, and a fiber mixed and used in the form of a spun yarn is preferable. The mixing ratio of the para-aramid fiber is preferably from 1 to 70% by weight based on the total weight of the fibers constituting the outermost layer. If the mixing ratio of the para-aramid fiber is less than 1% by weight, the fabric may be broken when exposed to a flame, that is, a hole may be formed. On the other hand, if the content exceeds 70% by weight, the para-aramid fibers are fibrillated and the wear resistance is undesirably reduced. The outermost layer may be a single ply or a double ply. For the outermost layer, a coating method, a spraying method, or a processing method such as an immersion method may be used to apply a fluorine-based water-repellent resin to the outermost layer and to process the outermost layer. Preferred for getting clothes.

  The innermost layer preferably has a moisture-permeable and waterproof property, and a layer obtained by laminating a moisture-permeable and waterproof thin film on a woven fabric composed of meta- or para-aramid fibers is most preferably used. In particular, as the optimal innermost layer, a woven fabric made of a meta-aramid fiber such as polymetaphenylene isophthalamide, which is a flame-retardant material, is used, and the woven fabric is made of a thin film made of polytetrafluoroethylene having moisture permeability and waterproofness. A film obtained by laminating a film is exemplified. With such an innermost layer, the moisture permeability and the chemical resistance are improved, and the evaporation of the sweat of the wearer is promoted, so that the heat stress of the wearer can be reduced. The fibers constituting the cloth may be spun yarns or filaments, and may be woven, knitted or non-woven fabrics.

Next, the textile product of the present invention comprises the above-described flame-retardant fabric or laminated flame-retardant fabric, and includes protective clothing, fire and fire protection clothing, firefighting activity clothing, rescue clothing, workwear, police uniform, SDF clothing, and military uniform. Any fiber product selected from the group consisting of:
Such a textile product exhibits an uneven structure on both sides of the fabric when exposed to a flame or heat, and has flame retardancy and heat shielding properties.

Next, examples and comparative examples of the present invention will be described in detail, but the present invention is not limited to these examples.
(1) Heat shrinkage This is the shrinkage of the yarn length before and after the heat treatment when the dry heat treatment is performed at 450 ° C. for 5 minutes.
Dry heat shrinkage (%) = ((Length before test (mm) −Length after test (mm)) / (Length before test (mm)) × 100
(2) Thickness The thickness was measured under a load of 3 g / cm ² in accordance with JIS L 1018 (haired knit).
(3) Total heat loss The total heat loss was determined according to ASTM F 1868 PartC.
(4) Heat insulation (radiation heat resistance)
Based on ISO9151, at a heat flux of 80 kW / m ² , HTI24 was determined as the time during which the copper sensor rose by 24 ° C. from the start of radiation heat exposure.

[Example 1]
The outermost layer is a mixture of polymetaphenylene isophthalamide fiber (manufactured by Teijin Limited, trade name: Conex) and coparaphenylene 3,4 'oxydiphenylene terephthalamide fiber (manufactured by Teijin Limited, trade name: Technora) A fabric (basis weight: 240 g / m ² ) woven into a 2/1 twill weave using spun yarn (count: 40/2) made of heat-resistant fibers mixed at a ratio of 90:10 was used.

  The fabric of the intermediate layer has the woven structure shown in FIG. 1. In the area A, the surface is made of a spun yarn 1 (polymetaphenylene isophthalamide fiber (manufactured by Teijin Limited, trade name: Conex) and coparaphenylene-3,4). 'A spun yarn (count: 40/2) composed of heat-resistant fiber mixed with oxydiphenylene terephthalamide fiber (manufactured by Teijin Limited, trade name: Technora) at a mixing ratio of 95: 5, and The back surface is composed of a spun yarn 2 (a spun yarn (counter: 40/2) made of coparaphenylene-3,4 ′ oxydiphenylene terephthalamide fiber (manufactured by Teijin Limited, trade name: Technora)). In B, a flame-retardant fabric composed of a spun yarn 2 on the front surface and a spun yarn 1 on the back surface was used. The area A and the area B were arranged in a checkered lattice, and the length of one side of one checkered lattice was 8 mm.

In the innermost layer, polymetaphenylene isophthalamide fiber (manufactured by Teijin Limited, trade name: Conex) and coparaphenylene 3,4 'oxydiphenylene terephthalamide fiber (manufactured by Teijin Limited, trade name: Technora) are used. A plain weave was woven using a spun yarn (count: 40 /-) made of heat-resistant fibers mixed at a mixing ratio of 95: 5. A woven cloth (having a basis weight of 65 g / m ² ) was laminated with a commercially available polytetrafluoroethylene moisture-permeable waterproof film. Table 1 shows the evaluation results of the heat-resistant protective clothing in which the three layers of the outermost layer, the intermediate layer, and the innermost layer were stacked.

  As shown in FIG. 2, such protective clothing exhibited unevenness on both sides of the fabric when exposed to a flame or heat, and had flame retardancy and heat shielding properties.

[Comparative Example 1]
In Example 1, the same spun yarn (polymetaphenylene isophthalamide fiber (manufactured by Teijin Limited, trade name: Conex)) and coparaphenylene / 3,4'oxydiphenylene terephthalamide fiber were used as the yarns 1 and 2 of the intermediate layer. (Manufactured by Teijin Limited, trade name: Technora) in the same manner as in Example 1 except that a spun yarn (count: 40/2) made of heat-resistant fiber mixed at a mixing ratio of 95: 5 was used. .

[Comparative Example 2]
In Example 1, the same spun yarn 1 (polymethaphenylene isophthalamide fiber (manufactured by Teijin Limited, trade name: Conex) and coparaphenylene / 3,4′-oxydiphenylene terephthalamide fiber) were formed on the surfaces of the regions A and B. (Teijin Co., trade name: Technora) and a mixture ratio of 95: 5 using a spun yarn made of heat-resistant fiber (count: 40/2). Same as Example 1 except that a spun yarn 2 (coparaphenylene-3,4′-oxydiphenylene terephthalamide fiber (manufactured by Teijin Limited, trade name: Technora) made of a spun yarn (count: 40/2)) was used. Carried out.

  According to the present invention, when exposed to a flame or heat, a textured structure develops on both sides of the fabric, and has flame retardancy and heat shielding properties. The industrial value is extremely large.

Claims (13)

  An area A in which the yarn 1 is exposed on the surface of the dough and the yarn 2 is exposed on the back surface of the dough, the flame retardant dough including the yarn 1 containing the aramid fiber and the yarn 2 containing the aramid fiber; And a region B in which the yarn 2 is exposed and the yarn 1 is exposed on the back surface of the fabric.   The flame retardant fabric according to claim 1, wherein the yarn 1 and / or the yarn 2 is a spun yarn.   The flame-retardant fabric according to claim 1 or 2, wherein the yarn 1 contains 50% by weight or more of para-aramid fiber based on the weight of the yarn, and the yarn 2 contains 30% or less of para-aramid fiber.   The flame-retardant fabric according to any one of claims 1 to 3, wherein a difference in heat shrinkage between the yarn 1 and the yarn 2 is 5% or more.   The flame-retardant fabric according to any one of claims 1 to 4, wherein the region A and the region B are arranged in a pattern on the front surface or the back surface of the fabric.   The flame retardant fabric according to any one of claims 1 to 5, wherein the thickness D of the flame retardant fabric before heat exposure is 2.0 mm or less. The flame retardant fabric according to any one of claims 1 to 6, wherein the thickness D of the flame retardant fabric and the thickness d of the fabric after heat exposure have the following relationship.
d-D> 1.0mm   A laminated flame-retardant fabric obtained by laminating another fabric on the flame-retardant fabric according to any one of claims 1 to 7, and laminating the laminate into three or more layers.   The laminated flame retardant fabric according to claim 8, wherein the flame retardant fabric is arranged in two or more layers in the laminated fabric. In the laminated dough, the total heat loss (THL) specified by ASTM F 1868 Part C is 300 W / m ² or more, and the HTI 24 until the sensor temperature rises by 24 ° C. in the radiant heat test specified by ISO9151 is 13 The laminated flame-retardant fabric according to claim 8 or 9, wherein the duration is not less than seconds. The laminated flame-retardant fabric according to any one of claims 8 to 10, wherein the thickness E of the whole laminated fabric and the thickness e of the laminated fabric after heat exposure have the following relationship.
ee> 1.0mm   The laminated flame-retardant fabric according to any one of claims 8 to 10, wherein the laminated fabric comprises a fabric in which a waterproof moisture-permeable film is laminated on one side.   A flame-retardant fabric or a laminated flame-retardant fabric according to any one of claims 1 to 12, which is used for protective clothing, fire and fire protection clothing, fire fighting clothing, rescue clothing, workwear, police uniform, SDF clothing, and military uniform. Any textile product selected from the group consisting of:

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