Fabrics and textiles

Abstract

To provide a fabric and a fiber product that combine not only flame retardancy and high strength, but also abrasion resistance, appearance quality, and excellent strength when exposed to flame or heat.SOLUTION: The fabric is provided, including: a spun yarn A which includes a meta-type wholly aromatic polyamide fiber, and a copolymer para-type wholly aromatic polyamide fiber; and a spun yarn B which includes a para-type wholly aromatic polyamide fiber, and has a woven fabric structure. The content of the meta-type wholly aromatic polyamide fiber included in the spun yarn B is less than the content of the meta-type wholly aromatic polyamide fiber included in the spun yarn A. The spun yarn B is used as the warp and the weft in the woven fabric, and six to fifteen yarns of the spun yarn A are arranged between at least two yarns of the spun yarns B. Limited oxygen index (LOI) specified by JIS L 1091 E-2 method is 26 or more.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to fabrics and textiles that combine flame retardancy and high tenacity, as well as abrasion resistance, aesthetic appearance, and excellent strength when exposed to flame or heat. [Background technology]

[0002] Conventionally, fabrics containing meta-type wholly aromatic polyamide fibers have been used as protective clothing such as work clothes and firefighting suits due to their excellent flame retardancy (e.g., Patent Document 1 and Patent Document 2). In addition, in order to improve the strength of fabrics constituting protective clothing, which is required to have high durability, it has been proposed to reinforce the fabric with high-strength yarns in a lattice pattern (e.g., Patent Document 3).

[0003] However, these fabrics have limitations on design because the reinforcing yarns and meta-type wholly aromatic polyamide fibers are different in color, and there is room for improvement in terms of appearance quality because the reinforcing yarns tend to whiten with washing and wear. Furthermore, the fabrics currently in use have the problem that if they are exposed to flames or heat even once during firefighting activities, the exposed areas become carbonized and embrittled, significantly impairing their protective function. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-221955 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-94043 [Patent Document 3] Special Publication No. 2017-517651 Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made in view of the above background, and an object of the present invention is to provide fabrics and textile products that not only have flame retardancy and high tenacity, but also have abrasion resistance, good appearance, and excellent strength when exposed to flame or heat. [Means for solving the problem]

[0006] As a result of extensive research to achieve the above object, the inventors have found that by skillfully devising the type of fibers constituting the fabric, it is possible to obtain a fabric that not only has flame retardancy and high strength, but also abrasion resistance, a good appearance, and excellent strength when exposed to flame or heat. Further extensive research has led to the completion of the present invention.

[0007] Thus, according to the present invention, there is provided "a fabric having a woven structure, comprising spun yarn A containing meta-type wholly aromatic polyamide fiber and copolymerized para-type wholly aromatic polyamide fiber, and spun yarn B containing para-type wholly aromatic polyamide fiber, wherein the content of meta-type wholly aromatic polyamide fiber contained in spun yarn B is less than the content of meta-type wholly aromatic polyamide fiber contained in spun yarn A, and wherein spun yarn B is arranged in the warp and weft, and 6 to 15 yarns of spun yarn B are arranged between at least two spun yarns B in the warp and weft, and wherein the limiting oxygen index (LOI) defined in JIS L 1091 E-2 method is 26 or more."

[0008] In this case, spun yarn A preferably contains copolymerized para-type wholly aromatic polyamide fibers and para-type wholly aromatic polyamide fibers other than the copolymerized para-type wholly aromatic polyamide fibers, and the weight ratio of the copolymerized para-type wholly aromatic polyamide fibers among all the para-type wholly aromatic polyamide fibers contained in spun yarn A is 25 to 75% by weight relative to the weight of all the para-type wholly aromatic polyamide fibers. Furthermore, in spun yarn A, the weight ratio (meta-type wholly aromatic polyamide fibers:para-type wholly aromatic polyamide fibers) is preferably 30:70 to 97:3. Furthermore, it is preferable that the meta-type wholly aromatic polyamide fibers and para-type wholly aromatic polyamide fibers of spun yarn A each contain 0.1 to 10% by weight of a black pigment or black dye relative to the fiber weight, and that the para-type wholly aromatic polyamide fibers of spun yarn B contain 0.1 to 10% by weight of a black pigment or black dye relative to the fiber weight. In this case, the black pigment is preferably carbon black. Furthermore, it is preferable that spun yarn B further contains any fiber selected from the group consisting of meta-type wholly aromatic polyamide fiber, polybenzoxazole fiber, polybenzimidazole fiber, and oxidized polyacrylonitrile fiber. It is also preferable that spun yarn B contains copolymerized para-type wholly aromatic polyamide fiber and polybenzoxazole fiber. It is also preferable that 80% or more of the yarns arranged between spun yarns B are spun yarn A. It is also preferable that the spun yarn B exposed on the surface opposite to the wearer accounts for 15% by weight or less. It is also preferable that the fibers constituting the spun yarns A and B do not contain black pigment or black dye. It is also preferable that the fabric consists only of spun yarn A and spun yarn B.

[0009] The present invention also provides a textile product made from the above-mentioned fabric, which is any one selected from the group consisting of protective clothing, fire-resistant clothing for firefighters, fire-fighting work uniforms, rescue clothing, work uniforms, happi coats, police uniforms, clothing for the Self-Defense Forces, military uniforms, racing suits, and vests. [Effects of the Invention]

[0010] The present invention provides fabrics and textiles that combine not only flame retardancy and high tenacity, but also abrasion resistance, good appearance, and excellent strength when exposed to flame or heat. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is an example of a woven fabric structure diagram that can be used in the present invention. [Figure 2] 1 is an example of a woven fabric structure diagram that can be used in the present invention. [Figure 3] FIG. 1 is a diagram showing the structure of the fabric used in Comparative Example 2. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments of the present invention will be described in detail. The fabric of the present invention comprises spun yarn A containing meta-type wholly aromatic polyamide fiber and copolymerized para-type wholly aromatic polyamide fiber, and spun yarn B containing para-type wholly aromatic polyamide fiber, wherein the fabric has a weave structure consisting of warp and weft yarns, the content of meta-type wholly aromatic polyamide fiber contained in spun yarn B is smaller than the content of meta-type wholly aromatic polyamide fiber contained in spun yarn A, spun yarn B (preferably spun yarn A and spun yarn B) is arranged in both the warp and weft yarns, and 6 to 15 yarns are arranged between at least any two spun yarns B in the warp and weft yarns, and the fabric has a limiting oxygen index (LOI) of 26 or more as defined in JIS L 1091 E-2.

[0013] In this case, the copolymerized para-type wholly aromatic polyamide fiber contained in the spun yarn A is preferably a copolyparaphenylene-3,4'-oxydiphenylene-terephthalamide fiber. As a commercially available product, "Technora (registered trademark)" manufactured by Teijin is suitable.

[0014] By constructing a fabric using spun yarn A and spun yarn B as described above, it is possible to achieve both flame retardancy and strength, and furthermore, by arranging each spun yarn in the fabric in the weave, it is possible to suppress whitening due to washing or friction.

[0015] Of all the para-type wholly aromatic polyamide fibers contained in the spun yarn A, the weight proportion of copolymerized para-type wholly aromatic polyamide fibers is preferably 25 to 75% by weight relative to the weight of all the para-type wholly aromatic polyamide fibers (the total weight of copolymerized para-type wholly aromatic polyamide fibers and para-type wholly aromatic polyamide fibers other than the copolymerized para-type wholly aromatic polyamide fibers). Suitable para-type wholly aromatic polyamide fibers other than the copolymerized para-type wholly aromatic polyamide fibers are non-copolymerized para-type wholly aromatic polyamide fibers made of polyparaphenylene terephthalamide, etc., and examples of commercially available products include Twaron (registered trademark) manufactured by Teijin.

[0016] If the proportion of copolymerized para-type wholly aromatic polyamide fibers is less than 25% by weight, whitening due to washing or friction may become noticeable and the abrasion resistance of the fabric may be reduced, whereas if the proportion of copolymerized para-type wholly aromatic polyamide fibers is more than 75% by weight, the strength when exposed to flame or heat may be reduced.

[0017] In spun yarn A, the weight ratio of meta-type wholly aromatic polyamide fiber to para-type wholly aromatic polyamide fiber (former:latter) is preferably within the range of 30:70 to 97:3 (more preferably 30:70 to 50:50, and particularly preferably 35:65 to 45:55). If the content of meta-type wholly aromatic polyamide fiber is less than this range, flame retardancy may decrease. Conversely, if the content of para-type wholly aromatic polyamide fiber is less than this range, tenacity may decrease. Furthermore, the content of meta-type wholly aromatic polyamide fiber contained in spun yarn A is preferably 10% by weight or more (more preferably 20 to 97% by weight) relative to the weight of the spun yarn.

[0018] Spun yarn A may contain other fibers such as acrylic fibers, acrylic fibers, rayon fibers, and flame-retardant rayon fibers. Furthermore, polyester fibers, polyamide fibers, and the like may be added to improve color development, abrasion resistance, moisture absorption and release, and adjust comfort. In this case, a flame retardant may be optionally contained to enhance flame retardancy, and the flame retardant may be encapsulated in the fiber or applied to the outer periphery. The content of such other fibers is preferably 30% by weight or less (more preferably 15% by weight or less, and even more preferably 10% by weight or less) of the weight of the spun yarn. It is also preferable that spun yarn A does not contain the other fibers, i.e., it is a spun yarn consisting only of meta-type wholly aromatic polyamide fibers and para-type wholly aromatic polyamide fibers.

[0019] The fibers constituting the spun yarn A may be long fibers (multifilament) or short fibers. In particular, short fibers with a fiber length of 25 to 200 mm (more preferably 30 to 150 mm) are preferred for blending with other fibers. The single fiber fineness is preferably in the range of 1 to 5 dtex. The yarn count is preferably 10 / 1 to 40 / 1, and two-ply twisted yarn is preferred.

[0020] In order to increase tenacity, the fabric of the present invention includes not only spun yarn A but also spun yarn B containing para-type wholly aromatic polyamide fibers. Examples of the para-type wholly aromatic polyamide fibers include non-copolymerized para-type wholly aromatic polyamide fibers made of polyparaphenylene terephthalamide and the like, and copolymerized para-type wholly aromatic polyamide fibers made of copolyparaphenylene-3,4'-oxydiphenylene terephthalamide and the like. Among these, it is preferable to include copolymerized para-type wholly aromatic polyamide fibers made of copolyparaphenylene-3,4'-oxydiphenylene terephthalamide to further increase tenacity.

[0021] Spun yarn B is a spun yarn containing para-type wholly aromatic polyamide fiber, and the content of meta-type wholly aromatic polyamide fiber contained in spun yarn B is smaller than the content of meta-type wholly aromatic polyamide fiber contained in spun yarn A. Spun yarn B may be composed solely of para-type wholly aromatic polyamide fiber, such as copolymerized para-type wholly aromatic polyamide fiber composed of copolyparaphenylene-3,4'-oxydiphenylene-terephthalamide or non-copolymerized para-type wholly aromatic polyamide fiber composed of polyparaphenylene terephthalamide, or may contain other fibers. However, it is preferable that the para-type wholly aromatic polyamide fiber account for 50% by weight or more (more preferably 70% by weight or more, and even more preferably 90% by weight or more) of the spun yarn. In this case, examples of other fibers include meta-type wholly aromatic polyamide fiber, polybenzoxazole fiber, polybenzimidazole fiber, and oxidized polyacrylonitrile fiber. In spun yarn B, the content of meta-type wholly aromatic polyamide fiber is preferably less than 10% by weight (more preferably 0% by weight) relative to the weight of the spun yarn.

[0022] The spun yarn B of the present invention may contain other fibers such as acrylic fibers, acrylic fibers, rayon fibers, and flame-retardant rayon fibers. Furthermore, polyester fibers, polyamide fibers, and the like may be added to improve color development, abrasion resistance, moisture absorption and release, and adjust comfort. In this case, a flame retardant may be optionally contained to enhance flame retardancy, and the flame retardant may be encapsulated in the fiber or applied to the outer periphery. The content of such other fibers is preferably 30% by weight or less (more preferably 15% by weight or less, and even more preferably 10% by weight or less) relative to the weight of the spun yarn. It is also preferable that the spun yarn B does not contain the other fibers, i.e., is a spun yarn consisting solely of para-type wholly aromatic polyamide fibers.

[0023] The fibers constituting the spun yarn B may be long fibers (multifilament) or short fibers. Short fibers with a fiber length of 25 to 200 mm (more preferably 30 to 150 mm) are particularly preferred. Furthermore, two-ply twisted yarn with a count of 10 / 1 to 40 / 1 is preferred.

[0024] The fabric preferably uses the spun yarn A and the spun yarn B as both the warp and weft. The fabric has a weave in which 6 to 15 yarns are arranged between at least two spun yarns B. More preferably, 80% or more of the yarns arranged between the spun yarns B are spun yarn A, even more preferably, 90% or more of the yarns arranged between the spun yarns B are spun yarn A, and most preferably, 100% of the yarns arranged between the spun yarns B are spun yarn A, i.e., the fabric is composed exclusively of spun yarn A and spun yarn B. The yarn arranged between two spun yarns B may be any yarn other than spun yarn B. For example, it may be spun yarn A or a spun yarn consisting solely of meta-type wholly aromatic polyamide fiber. While fewer than six yarns are used, the proportion of spun yarn B in the fabric is high, resulting in increased strength, this is undesirable because it limits design possibilities and causes significant whitening due to washing and abrasion. On the other hand, if the number of threads is more than 15, the ratio of spun yarn B in the fabric will be low, which is undesirable as it will reduce the strength of the fabric. The thread placed between two spun yarns B is preferably a flame-retardant fiber. The weave density is preferably in the range of a warp density of 30 to 70 threads / 2.54 cm and a weft density of 26 to 66 threads / 2.54 cm.

[0025] The meta-type wholly aromatic polyamide fibers (meta-type aramid fibers) contained in the fabric of the present invention are preferably fibers made of a polymer in which 85 mol % or more of the repeating units are m-phenylene isophthalamide. Such meta-type wholly aromatic polyamides may be copolymers containing less than 15 mol % of a third component.

[0026] Such meta-type wholly aromatic polyamides can be produced by a conventionally known interfacial polymerization method, and the degree of polymerization of the polymer is preferably such that the intrinsic viscosity (IV) measured in an N-methyl-2-pyrrolidone solution at a concentration of 0.5 g / 100 ml is in the range of 1.3 to 1.9 dl / g.

[0027] The meta-type wholly aromatic polyamide may contain an alkylbenzenesulfonate onium salt. Preferred examples of the alkylbenzenesulfonate onium salt include hexylbenzenesulfonate tetrabutylphosphonium salt, hexylbenzenesulfonate tributylbenzylphosphonium salt, dodecylbenzenesulfonate tetraphenylphosphonium salt, dodecylbenzenesulfonate tributyltetradecylphosphonium salt, dodecylbenzenesulfonate tetrabutylphosphonium salt, and dodecylbenzenesulfonate tributylbenzylammonium salt. Among these, dodecylbenzenesulfonate tetrabutylphosphonium salt and dodecylbenzenesulfonate tributylbenzylammonium salt are particularly preferred because they are easily available, have good thermal stability, and have high solubility in N-methyl-2-pyrrolidone.

[0028] In order to obtain a sufficient effect of improving dyeability, the content of the alkylbenzenesulfonic acid onium salt is preferably 2.5 mol % or more, and more preferably in the range of 3.0 to 7.0 mol %, based on the poly-m-phenylene isophthalamide.

[0029] The poly-m-phenylene isophthalamide and the alkylbenzene sulfonate onium salt may be mixed by, for example, dissolving the poly-m-phenylene isophthalamide in a solvent and then dissolving the alkylbenzene sulfonate onium salt in the solvent. The dope thus obtained is formed into fibers by a conventionally known method.

[0030] For the purpose of improving dyeability and resistance to fading, the polymer used for meta-type wholly aromatic polyamide fibers may be copolymerized in an aromatic polyamide skeleton containing a repeating structural unit represented by the following formula (1) with an aromatic diamine component or aromatic dicarboxylic acid halide component different from the main structural unit of the repeating structure as a third component in an amount of 1 to 10 mol % relative to the total amount of repeating structural units of the aromatic polyamide. -(NH-Ar1-NH-CO-Ar1-CO)- Formula (1) Here, Ar1 is a divalent aromatic group having a bonding group in a direction other than the meta-coordinate or parallel axis direction.

[0031] They can also be copolymerized as a third component, and specific examples of the aromatic diamines shown in formulas (2) and (3) include p-phenylenediamine, chlorophenylenediamine, methylphenylenediamine, acetylphenylenediamine, aminoanisidine, benzidine, bis(aminophenyl)ether, bis(aminophenyl)sulfone, diaminobenzanilide, diaminoazobenzene, etc. Specific examples of the aromatic dicarboxylic acid dichlorides shown in formulas (4) and (5) include 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, etc. H2N-Ar2-NH2...Formula (2) H2N-Ar2-Y-Ar2-NH2···Eq. (3) XOC-Ar3-COX...Formula (4) XOC-Ar3-Y-Ar3-COX...Formula (5)

[0032] 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 or functional group selected from the group consisting of an oxygen atom, a sulfur atom, and an alkylene group, and X is a halogen atom.

[0033] The crystallinity of the meta-type wholly aromatic polyamide fiber is preferably 5 to 35% because it has good dye exhaustion properties and can easily adjust to a target color with less dye or under weak dyeing conditions.Furthermore, it is more preferably 15 to 25% because it is less likely to cause uneven distribution of the dye on the surface, has high resistance to discoloration, and can ensure the dimensional stability required for practical use.

[0034] The meta-type wholly aromatic polyamide fiber can be produced, for example, by the following method. The polymerization method for the meta-type wholly aromatic polyamide polymer is not particularly limited, and for example, the solution polymerization method or interfacial polymerization method described in Japanese Patent Publication No. 14399 / 1960, U.S. Pat. No. 3,360,595, Japanese Patent Publication No. 10863 / 1972, etc. may be used.

[0035] The spinning solution is not particularly limited, but may be an amide-based solvent solution containing an aromatic copolyamide polymer obtained by the above-mentioned solution polymerization or interfacial polymerization, or may be a solution obtained by isolating the polymer from the above-mentioned polymerization solution and dissolving it in an amide-based solvent.

[0036] Examples of the amide solvent used here include N,N-dimethylformamide, N,N-dimethylacetamide, N-methyl-2-pyrrolidone, and dimethyl sulfoxide, with N,N-dimethylacetamide being particularly preferred.

[0037] The copolymerized aromatic polyamide polymer solution obtained as described above is stabilized by further containing an alkali metal salt or alkaline earth metal salt, which allows use at a higher concentration and at a lower temperature, and is preferably used in an amount of 1% by weight or less, more preferably 0.1% by weight or less, based on the total weight of the polymer solution.

[0038] In the spinning and coagulation step, the spinning solution (meta-type wholly aromatic polyamide 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. In addition, the number, arrangement, and shape of the spinning holes in the spinneret do not need to be particularly limited as long as it can perform stable wet spinning. For example, a multi-hole spinneret for staple fibers having 1,000 to 30,000 holes and a spinning hole diameter of 0.05 to 0.2 mm may be used. The temperature of the spinning solution (meta-type wholly aromatic polyamide polymer solution) when spun out from the spinneret is suitably in the range of 20 to 90°C.

[0039] The coagulation bath used to obtain the fibers is an aqueous solution of an amide solvent, preferably NMP, substantially free of inorganic salts, with a concentration of 45 to 60% by mass, and the bath temperature is in the range of 10 to 50°C. If the concentration of the amide solvent (preferably NMP) is less than 45% by mass, the skin will be thick, reducing the washing efficiency in the washing step and making it difficult to reduce the amount of solvent remaining in the fibers. On the other hand, if the concentration of the amide solvent (preferably NMP) exceeds 60% by mass, uniform coagulation cannot be achieved even in the interior of the fibers, making it difficult to reduce the amount of solvent remaining in the fibers. The appropriate immersion time for the fibers in the coagulation bath is in the range of 0.1 to 30 seconds.

[0040] Subsequently, the film is stretched at a stretching ratio of 3 to 4 in a plastic stretching bath containing an amide solvent, preferably an aqueous solution of NMP with a concentration of 45 to 60% by mass, and the bath temperature is set to 10 to 50° C. After stretching, the film is thoroughly washed by passing it through an aqueous solution of NMP with a concentration of 20 to 40% by mass at 10 to 30° C., and then through a warm water bath at 50 to 70° C. The washed fibers are subjected to a dry heat treatment at a temperature of 270 to 290° C., whereby meta-type wholly aromatic polyamide fibers satisfying the above range of crystallinity can be obtained.

[0041] The fabric of the present invention is a woven fabric consisting of warp and weft yarns, which allows the fabric to have both flame retardancy and strength. Preferably, the spun yarn B appearing on the surface opposite the wearer is 15% by weight or less, which further reduces whitening due to washing or friction. For example, the fabric can be woven as shown in Figures 1 and 2. Furthermore, such a woven fabric can be produced using the spun yarn A and the spun yarn B on a rapier loom, air jet loom, or the like.

[0042] Furthermore, in the fabric of the present invention, when the meta-type wholly aromatic polyamide fiber and the para-type wholly aromatic polyamide fiber contained in the spun yarn A each contain 0.1 to 10 wt % of a black pigment or black dye relative to the fiber weight, the para-type wholly aromatic polyamide fiber constituting the spun yarn B preferably contains 0.1 to 10 wt % of a black pigment or black dye relative to the fiber weight. Here, the black pigment is preferably carbon black. Alternatively, when the meta-type wholly aromatic polyamide fiber and the para-type wholly aromatic polyamide fiber contained in the spun yarn A do not contain a black pigment or black dye, the para-type wholly aromatic polyamide fiber contained in the spun yarn B preferably does not contain a black pigment or black dye. This is preferable because it does not restrict the design properties of the fabric.

[0043] Furthermore, the fabric of the present invention may be subjected to dyeing, flame retardant, antibacterial and deodorizing, bacteriostatic, ultraviolet shielding, water repellent, oil repellent, water absorbent, etc., as long as the effects of the invention are not impaired. The fabric of the present invention has the above-mentioned structure and therefore has not only flame retardancy and high tenacity, but also abrasion resistance, good appearance, and excellent strength when exposed to flame or heat.

[0044] The textile product of the present invention is any textile product selected from the group consisting of protective clothing, fire-resistant clothing for firefighters, fire-fighting work uniforms, rescue clothing, work uniforms, happi coats, police uniforms, clothing for the Self-Defense Forces, military uniforms, racing suits, and vests, made using the fabric. Since such textile products use the above-mentioned fabric, they are not only flame-retardant and strong, but also inhibit whitening due to friction during wear and have excellent appearance quality. [Example]

[0045] The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples. The physical properties in the examples were measured by the following methods. (1) Limiting Oxygen Index (LOI) The limiting oxygen index (LOI) was measured according to JIS L 1091 E-2 method. (2) Abrasion resistance of fabric In the abrasion strength measurement specified in JIS L1096 8.9.1.A-1 method (flat method), #1200 abrasive paper was used to measure the number of times until a hole was made. A test result of 200 times or more was considered a pass. In the abrasion test specified in ISO 12947-2 (Martindale), a test result of 20,000 times or more was considered a pass. (3) Embrittlement due to carbonization after heat exposure Using the test equipment specified in ISO17492, a heat flux of 84kW / m 2 After 10 seconds of exposure to a flame, the fabric was deemed to have failed if it had become embrittled due to charring and lost its flexibility. (4) Changes in appearance due to washing The fabric was washed 20 times as specified in JIS L 1930:2014. After washing, the fabric was visually inspected for discoloration according to the visual inspection method of JIS L 0804:2004. The evaluation was graded from grade 5 to grade 1, with grade 2 or above being considered a pass.

[0046] [Example 1] A 20 / 1 count spun yarn was produced using meta-type wholly aromatic polyamide fiber (Teijinconex®, manufactured by Teijin) containing 1.1 wt% carbon black pigment and having a single fiber fineness of 1.7 dtex and a fiber length of 51 mm, copolymerized para-type wholly aromatic polyamide fiber (Teijin Technora®, manufactured by Teijin) containing 1.5 wt% carbon black pigment and having a single fiber fineness of 1.7 dtex and a fiber length of 51 mm, and non-copolymerized para-type wholly aromatic polyamide fiber (Twaron®, manufactured by Teijin) containing a black dye and having a single fiber fineness of 1.7 dtex and a fiber length of 50 mm, so that the composition was 40 wt% meta-type wholly aromatic polyamide fiber, 40 wt% copolymerized para-type wholly aromatic polyamide fiber, and 20 wt% non-copolymerized para-type wholly aromatic polyamide fiber, and a two-ply twisted yarn (spun yarn A).

[0047] On the other hand, a 20 / 1 count spun yarn was produced using a copolymer para-type wholly aromatic polyamide fiber (Teijin's "Technora (registered trademark)") containing 5.0 wt% carbon black pigment, with a single fiber fineness of 1.7 dtex and a fiber length of 51 mm, to obtain a two-ply twisted yarn (spun yarn B). Next, using spun yarn A (two-ply yarn) and spun yarn B (two-ply yarn) as warp and weft yarns, a plain weave fabric was woven with a warp density of 50 threads / 2.54 cm and a weft density of 46 threads / 2.54 cm, as shown in Figure 1. The resulting unprocessed woven fabric (grey) was subjected to a conventional scouring process and heat set at 190° C. to obtain a woven fabric. The evaluation results of the obtained woven fabric are shown in Table 1.

[0048] [Example 2] A 20 / 1 count spun yarn was produced using a meta-type wholly aromatic polyamide fiber (Teijinconex®, manufactured by Teijin) containing no black pigment or black dye and having a single fiber fineness of 1.7 dtex and a fiber length of 51 mm, a copolymerized para-type wholly aromatic polyamide fiber (Teijin Technora®, manufactured by Teijin) containing no black pigment or black dye and having a single fiber fineness of 1.7 dtex and a fiber length of 51 mm, and a non-copolymerized para-type wholly aromatic polyamide fiber (Twaron®, manufactured by Teijin) having a single fiber fineness of 1.7 dtex and a fiber length of 50 mm, so that the composition was 40% by weight of the meta-type wholly aromatic polyamide fiber, 40% by weight of the copolymerized para-type wholly aromatic polyamide fiber, and 20% by weight of the non-copolymerized para-type wholly aromatic polyamide fiber, and a two-ply twisted yarn (spun yarn A).

[0049] On the other hand, a 20 / 1 count spun yarn was produced using a copolymer para-type wholly aromatic polyamide fiber ("Technora (registered trademark)" manufactured by Teijin) containing no black pigment or black dye and having a single fiber fineness of 1.7 dtex and a fiber length of 51 mm, to obtain a two-ply twisted yarn (spun yarn B). Next, in the same manner as in Example 1, the spun yarn A (two-ply yarn) and the spun yarn B (two-ply yarn) were used as warp and weft yarns to weave a plain weave fabric having the weave diagram shown in Figure 1 at a warp density of 50 threads / 2.54 cm and a weft density of 46 threads / 2.54 cm. The resulting unprocessed woven fabric (grey) was subjected to a conventional scouring process and heat set at 190° C. to obtain a woven fabric. The evaluation results of the obtained woven fabric are shown in Table 1.

[0050] [Example 3] The same procedure as in Example 1 was repeated, except that a 20 / 1 count spun yarn was produced using copolymerized para-type wholly aromatic polyamide fiber (Teijin's "Technora (registered trademark)") containing 5.0 wt% carbon black pigment, with a single fiber fineness of 1.7 dtex and a fiber length of 51 mm, and polybenzoxazole fiber (Toyobo's "Zylon (registered trademark)"), so that the copolymerized para-type wholly aromatic polyamide fiber was 80 wt% and the polybenzoxazole fiber was 20 wt%. Two-ply twisted textured yarn (spun yarn B) was obtained. The evaluation results of the resulting woven fabric are shown in Table 1.

[0051] [Example 4] A 20 / 1 count spun yarn was produced using meta-type wholly aromatic polyamide fiber (Teijinconex®, manufactured by Teijin) containing 1.1 wt% carbon black pigment, a single fiber fineness of 1.7 dtex, and a fiber length of 51 mm, and copolymerized para-type wholly aromatic polyamide fiber (Teijin Technora®, manufactured by Teijin) containing 1.5 wt% carbon black pigment, a single fiber fineness of 1.7 dtex, and a fiber length of 51 mm, so that the mixture was 40 wt% meta-type wholly aromatic polyamide fiber and 60 wt% copolymerized para-type wholly aromatic polyamide fiber, and a two-ply twisted yarn (spun yarn A) was obtained in the same manner as in Example 1. The evaluation results of the resulting woven fabric are shown in Table 1.

[0052] [Comparative Example 1] A 20 / 1 count spun yarn was produced using meta-type wholly aromatic polyamide fiber (Teijinconex®, manufactured by Teijin) containing 1.1 wt% carbon black pigment, a single fiber fineness of 1.7 dtex, and a fiber length of 51 mm, and non-copolymerized para-type wholly aromatic polyamide fiber (Twaron®, manufactured by Teijin) containing a black dye, a single fiber fineness of 1.7 dtex, and a fiber length of 50 mm, so that the mixture was 40 wt% meta-type wholly aromatic polyamide fiber and 60 wt% non-copolymerized para-type wholly aromatic polyamide fiber, and the two-ply twisted yarn (spun yarn A) was obtained in the same manner as in Example 1. The evaluation results of the resulting woven fabric are shown in Table 1.

[0053] Comparative Example 2 A woven fabric was obtained in the same manner as in Example 1, except that a plain weave fabric having the weave diagram shown in Figure 3 was woven. The evaluation results of the obtained woven fabric are shown in Table 1.

[0054] [Table 1] [Industrial Applicability]

[0055] According to the present invention, fabrics and textile products are provided which not only have flame retardancy and high tenacity, but also have abrasion resistance, good appearance, and excellent strength when exposed to flame or heat, and these fabrics and textile products are of great industrial value.

Claims

1. A fabric having a woven structure, comprising: a spun yarn A containing a meta-type wholly aromatic polyamide fiber and a copolymerized para-type wholly aromatic polyamide fiber; and a spun yarn B containing a para-type wholly aromatic polyamide fiber, the content of meta-type wholly aromatic polyamide fiber contained in spun yarn B is smaller than the content of meta-type wholly aromatic polyamide fiber contained in spun yarn A, The warp and weft yarns are made of spun yarn B, and 6 to 15 yarns are arranged between at least two spun yarns B in the warp and weft yarns. The limiting oxygen index (LOI) specified in JIS L 1091 E-2 method is 26 or more, and the warp and weft yarns are made of a two-ply twisted spun yarn A with a count of 20 / 1 and a two-ply twisted spun yarn B with a count of 20 / 1. and the spun yarn B is made of only copolymerized para-type wholly aromatic polyamide fiber and polybenzoxazole fiber.

2. 2. The fabric according to claim 1, wherein spun yarn A contains copolymerized para-type wholly aromatic polyamide fibers and para-type wholly aromatic polyamide fibers other than the copolymerized para-type wholly aromatic polyamide fibers, and the weight ratio of the copolymerized para-type wholly aromatic polyamide fibers among all the para-type wholly aromatic polyamide fibers contained in spun yarn A is 25 to 75% by weight relative to the weight of all the para-type wholly aromatic polyamide fibers.

3. 3. The fabric according to claim 1, wherein the weight ratio (meta-type wholly aromatic polyamide fiber:para-type wholly aromatic polyamide fiber) in spun yarn A is 30:70 to 97:

3.

4. The fabric according to any one of claims 1 to 3, wherein the meta-type wholly aromatic polyamide fiber and the para-type wholly aromatic polyamide fiber contained in spun yarn A each contain 0.1 to 10% by weight of a black pigment or black dye relative to the fiber weight, and the para-type wholly aromatic polyamide fiber contained in spun yarn B contains 0.1 to 10% by weight of a black pigment or black dye relative to the fiber weight.

5. 5. The fabric of claim 4, wherein the black pigment is carbon black.

6. The fabric according to any one of claims 1 to 5, wherein 80% or more of the yarns arranged between the spun yarns B are spun yarns A.

7. The fabric according to any one of claims 1 to 6, wherein the spun yarn B exposed on the surface opposite to the wearer is 15% by weight or less.

8. The fabric according to any one of claims 1 to 3, wherein the fibers constituting the spun yarns A and B do not contain a black pigment or black dye.

9. The fabric according to any one of claims 1 to 8, wherein the fabric consists solely of spun yarn A and spun yarn B.

10. Any textile product selected from the group consisting of protective clothing, fire-resistant clothing for firefighters, fire-fighting work uniforms, rescue clothing, work clothes, happi coats, police uniforms, clothing for the Self-Defense Forces, military uniforms, racing suits, and vests, which is made using the fabric described in any one of claims 1 to 9.

Images