Flame-retardant fabrics and textile products

Abstract

To provide a flame-retardant fabric and a fiber product which include a meta-form wholly aromatic polyamide fiber and have extremely excellent flame retardancy, and which are also excellent in water repellency and tear strength taking the environment into consideration.SOLUTION: A fabric includes a meta-form wholly aromatic polyamide fiber contains a water repellency agent including any one selected from the group consisting of a hydrocarbon-based compound, a silicone-based compound, an urethane-based compound, an acrylic-based compound, and wax. After-flame time is two seconds or less in a burning test prescribed in ISO15025:2000, Procedure A.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a flame-retardant fabric and fiber product that contains meta-type wholly aromatic polyamide fiber, has extremely excellent flame retardancy, and also has excellent water repellency and tear strength that consider the environment.

Background Art

[0002] Conventionally, flame-retardant fabrics have been used for applications such as protective clothing, fireproof and fire-fighting clothing, fire-fighting activity clothing, rescue clothing, flame-retardant workwear, police uniforms, Self-Defense Force clothing, military uniforms, etc. On the other hand, in recent years, there has been a demand for flame-retardant fabrics that not only have flame retardancy but also have excellent water repellency and tear strength that consider the environment. Various types of water-repellent fabrics have been proposed so far, but they have not yet been satisfactory in terms of flame retardancy, water repellency that considers the environment, and tear strength (for example, Patent Documents 1 to 3).

Prior Art Documents

[0006] In this case, it is preferable that the fabric does not contain alkyl fluoropolymers. It is also preferable that the fabric contains blocked isocyanates. Furthermore, it is preferable that the fabric contains 50% by mass or more of meta-type total aromatic polyamide fibers relative to the mass of the fabric. Furthermore, it is preferable that the residual solvent content of the meta-type total aromatic polyamide fibers is 0.1% by mass or less. Furthermore, it is preferable that the crystallinity of the meta-type total aromatic polyamide fibers is in the range of 15 to 50%.

[0007] In the flame-retardant fabric of the present invention, it is preferable that the water repellency measured by the JIS L 1092 spray method is grade 4 or higher. Furthermore, the fabric weight is 120 to 300 g / m². 2 It is preferable that the material is within the specified range. Furthermore, it is preferable that the water repellency measured by the JIS L 1092 spray method after 10 washes according to the JIS L0217 method (using JAFET standard detergent) is grade 3 or higher. It is also preferable that the tear strength is 10N or higher. Furthermore, it is preferable that the shrinkage rate after 5 washes according to the method specified in ISO 5077 is 5% or less. Furthermore, it is preferable that the heat shrinkage rate after heat treatment at 180°C for 5 minutes according to ISO 17493 is 5% or less. In addition, it is preferable that the meta-type fully aromatic polyamide fiber contains an organic dye, an organic pigment, or an inorganic pigment.

[0008] Furthermore, according to the present invention, a textile product is provided which is made using the aforementioned flame-retardant fabric and is selected from the group consisting of protective clothing, firefighting clothing, firefighting clothing, rescue clothing, workwear, police uniforms, Self-Defense Forces clothing, and military uniforms. [Effects of the Invention]

[0009] According to the present invention, flame-retardant fabrics and textile products containing meta-type all-aromatic polyamide fibers are obtained, possessing extremely excellent flame retardancy, environmentally friendly water repellency, and superior tear strength. [Modes for carrying out the invention]

[0010] The embodiments of the present invention will now be described in detail. First, the meta-type all-aromatic polyamide fiber (meta-type aramid fiber) used in the present invention is a fiber made of a polymer in which 85 mol% or more of its repeating units are m-phenylene isophthalamide. Such a meta-type all-aromatic polyamide may also be a copolymer containing a third component in a range of less than 15 mol%.

[0011] Such meta-type all-aromatic polyamides can be produced by conventionally known interfacial polymerization methods, and the degree of polymerization of the polymer is preferably such that the intrinsic viscosity (IV), measured with a 0.5 g / 100 ml N-methyl-2-pyrrolidone solution, is in the range of 1.3 to 1.9 dl / g.

[0012] The above meta-type total aromatic polyamide may contain an alkylbenzenesulfonate onium salt. Preferred examples of alkylbenzenesulfonate onium salts include compounds such as hexylbenzenesulfonate tetrabutylphosphonium salt, hexylbenzenesulfonate tributylbenzylphosphonium salt, dodecylbenzenesulfonate tetraphenylphosphonium salt, dodecylbenzenesulfonate tributyltetradecylphosphonium salt, dodecylbenzenesulfonate tetrabutylphosphonium salt, and dodecylbenzenesulfonate tributylbenzylammonium salt. Among these, dodecylbenzenesulfonate tetrabutylphosphonium salt or dodecylbenzenesulfonate tributylbenzylammonium salt are particularly preferred examples because they are readily available, have good thermal stability, and have high solubility in N-methyl-2-pyrrolidone.

[0013] The content of the above alkylbenzenesulfonic acid onium salt is preferably in the range of 2.5 mol% or more, more preferably 3.0 to 7.0 mol%, relative to poly-m-phenylene isophthalamide, in order to obtain a sufficient improvement in dyeing properties.

[0014] Furthermore, as a method for mixing poly-m-phenylene isophthalamide and alkylbenzenesulfonate onium salt, one method is to mix and dissolve poly-m-phenylene isophthalamide in a solvent, and then dissolve alkylbenzenesulfonate onium salt in the solvent, and either of these methods may be used. The dope obtained in this way is formed on fibers by conventionally known methods.

[0015] For use in meta-type all-aromatic polyamide fibers, the polymer may also be copolymerized as a third component in an aromatic polyamide skeleton containing repeating structural units shown in formula (1) below, in an amount of 1 to 10 mol% relative to the total amount of repeating structural units of the aromatic polyamide, in order to improve dyeability and resistance to discoloration and fading. -(NH-Ar1-NH-CO-Ar1-CO)- ··· Formula (1) Here, Ar1 is a divalent aromatic group having a bonding group other than the meta coordination or the parallel axis direction.

[0016] Also, it is possible to copolymerize as the third component. Specific examples of the aromatic diamines shown in Formulas (2) and (3) include, for example, p-phenylenediamine, chlorophenylene diamine, methylphenylenediamine, acetylphenylenediamine, aminoanisidine, benzidine, bis(aminophenyl)ether, bis(aminophenyl)sulfone, diaminobenzanilide, diaminoazobenzene, and the like. Specific examples of the aromatic dicarboxylic acid dichlorides shown in 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.

[0017] H2N-Ar2-NH2 ··· Formula (2) H2N-Ar2-Y-Ar2-NH2 ··· Formula (3) XOC-Ar3-COX ··· Formula (4) XOC-Ar3-Y-Ar3-COX ··· Formula (5)

[0018] 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 represents a halogen atom.

[0019] Also, the crystallinity of the meta-type wholly aromatic polyamide fiber is preferably 15 to 50% in that the exhaustion property of the dye is good and it is easy to adjust to the target color with less dye or under milder dyeing conditions. Further, it is more preferably 15 to 25% in terms of the difficulty of surface uneven distribution of the dye, high resistance to color change and fading, and ensuring the dimensional stability required in practical use.

[0020] In addition, the residual solvent amount of the meta-type wholly aromatic polyamide fiber is preferably 0.1% by mass or less (preferably 0.001 to 0.1% by mass) so as not to impair the excellent flame retardant performance of the meta-type wholly aromatic polyamide fiber.

[0021] The meta-type wholly aromatic polyamide fiber can be produced by the following method, and in particular, by the method described later, the crystallinity and the residual solvent amount can be made within the above ranges. The polymerization method of the meta-type wholly aromatic polyamide polymer is not particularly limited, and for example, the solution polymerization method or the interfacial polymerization method described in Japanese Patent Publication No. 35-14399, U.S. Patent No. 3360595, Japanese Patent Publication No. 47-10863, etc. may be used.

[0022] 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 isolated from the above polymerization solution and dissolved in an amide-based solvent.

[0023] Examples of the amide-based solvent used here include N,N-dimethylformamide, N,N-dimethylacetamide, N-methyl-2-pyrrolidone, dimethyl sulfoxide, etc., but N,N-dimethylacetamide is particularly preferred.

[0024] 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 it is preferable that it can be used at a higher concentration and at a lower temperature. Preferably, the alkali metal salt and the alkaline earth metal salt are 1% by mass or less, more preferably 0.1% by mass or less, based on the total weight of the polymer solution. 量に対して1質量%以下、より好ましくは0.1質量%以下である。 In the spinning and coagulation step, the spinning solution (meta-type wholly aromatic polyamide polymer solution) obtained above is spun into a coagulation liquid and coagulated.

[0025] The spinning apparatus is not particularly limited, and conventionally known wet spinning apparatuses can be used. Furthermore, as long as it can perform stable wet spinning, there is no particular need to limit the number of spinning holes, arrangement, hole shape, etc. of the spinneret. For example, a multi-hole spinneret for rayon with 1,000 to 30,000 holes and a spinning hole diameter of 0.05 to 0.2 mm may be used. Furthermore, the appropriate temperature for the spinning solution (meth-type total aromatic polyamide polymer solution) when spinning from the spinneret is in the range of 20 to 90°C.

[0026] For obtaining the fibers, an aqueous solution of an amide-based solvent, preferably NMP, with a concentration of 45-60% by mass, which is substantially free of inorganic salts, is used as the coagulation bath at a bath temperature in the range of 10-50°C. If the concentration of the amide-based solvent (preferably NMP) is less than 45% by mass, the skin will have a thick structure, reducing the cleaning efficiency in the washing process and making it difficult to reduce the amount of solvent remaining in the fibers. On the other hand, if the concentration of the amide-based solvent (preferably NMP) exceeds 60% by mass, uniform coagulation cannot be achieved even inside the fibers, and therefore it is also 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 0.1-30 seconds.

[0027] Subsequently, the material is stretched at a stretching ratio of 3 to 4 times in a plasticizing stretching bath, which is an aqueous solution of an amide solvent, preferably NMP, with a concentration of 45 to 60% by mass, and the bath temperature is in the range of 10 to 50°C. After stretching, the material 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, followed by a warm water bath at 50 to 70°C. After washing, the fibers are subjected to dry heat treatment at a temperature of 270-290°C to obtain meta-type fully aromatic polyamide fibers that satisfy the above-mentioned range of crystallinity and residual solvent content.

[0028] In the meta-type all-aromatic polyamide fiber, the fiber may be a long fiber (multifilament) or a short fiber. In particular, short fibers with a fiber length of 25 to 200 mm are preferred for blending with other fibers. Furthermore, the single fiber fineness is preferably in the range of 1 to 5 dtex. The meta-type all-aromatic polyamide fiber may contain an organic dye, organic pigment, or inorganic pigment.

[0029] In the present invention, the fabric may consist only of the meta-type all-aromatic polyamide fibers, but it is preferable that it also contains polyester fibers. When polyester fibers are included in the fabric, the SP value (solubility parameter) of the crosslinking agent having an oxazoline group, as described below, or the binder made of an acrylic resin and / or urethane resin is close to that of the polyester fibers and adheres easily to the polyester fibers, thus improving the antibacterial washing durability, which is preferable. In this case, the mass of polyester fibers included in the fabric is preferably in the range of 2 to 20% by mass relative to the mass of the fabric. If the weight of polyester fibers is greater than this range, the flame retardancy may decrease. Conversely, if the weight of polyester fibers is less than this range, the antibacterial washing durability may decrease.

[0030] Furthermore, it is preferable that the fabric also contains flame-retardant fibers such as meta-type all-aromatic polyamide fibers, para-type all-aromatic polyamide fibers, all-aromatic polyester fibers, polybenzoxazole (PBO) fibers, polybenzimidazole (PBI) fibers, polybenzthiazole (PBTZ) fibers, polyimide (PI) fibers, polysulfonamide (PSA) fibers, polyetheretherketone (PEEK) fibers, polyetherimide (PEI) fibers, polyarylate (PAr) fibers, melamine fibers, phenolic fibers, fluorine-based fibers, and polyphenylene sulfide (PPS) fibers. In this case, it is preferable that the limiting oxygen index (LOI) of such flame-retardant fibers is 20 or higher.

[0031] Furthermore, it is preferable if the fabric also contains cellulose fibers (preferably flame-retardant rayon fibers), polyolefin fibers, acrylic fibers, cotton fibers, animal hair fibers, polyurethane fibers, polyvinyl chloride fibers, polyvinylidene chloride fibers, acetate fibers, polycarbonate fibers, etc., as this adds water absorption, dyeability, and wearability.

[0032] Furthermore, conductive fibers are listed as essential in the ISO 11612 standard, and since preventing static electricity in fabrics is necessary for flame-retardant materials, it is preferable that conductive fibers be included in the fabric.

[0033] Here, it is preferable that these fibers are blended. In this case, in order to exhibit the excellent heat resistance and flame retardancy of the meta-type all-aromatic polyamide fibers, it is preferable that the meta-type all-aromatic polyamide fibers make up 50% by mass or more of the total fabric mass.

[0034] In the present invention, the method for manufacturing the fabric is not particularly limited, and any known method can be used. For example, it is preferable to obtain spun yarn by blending the above fibers, and then weave it into a twill weave, plain weave, or other structure using a rapier loom or the like with single or double yarns.

[0035] The flame-retardant fabric of the present invention contains a water-repellent agent selected from the group consisting of hydrocarbon compounds, silicone compounds, urethane compounds, acrylic compounds, and waxes, as a non-fluorinated water-repellent agent. From an environmental perspective and in order to obtain excellent tear strength, it is preferable not to include fluorinated water-repellent agents such as alkyl fluoropolymers. If necessary, it is preferable to mix a crosslinking agent (e.g., blocked isocyanate), an antistatic agent, a melamine resin, and a catalyst to make a processing agent with a water-repellent concentration of about 3 to 15% by mass, and to treat the surface of the fabric with this processing agent at a pickup rate of about 50 to 90%. Examples of methods for treating the surface of the fabric with the processing agent include the pad method and the spray method. Among these, the pad method is preferred for penetrating the processing agent into the interior of the fabric. The pickup rate is the mass ratio (%) of the processing agent to the weight of the fabric (before application of the processing agent).

[0036] Specifically, as non-fluorinated water repellents, hydrocarbon compounds such as aliphatic hydrocarbons, aliphatic carboxylic acids, olefins, polyacrylic acid esters, or polymethacrylic acid esters can be used. As silicone compounds, amino-modified silicones, epoxy-modified silicones, carboxy-modified silicones, etc., can be used. Commercially available examples of hydrocarbon compounds include Meisei Chemical Industry Co., Ltd.'s Mayshield P-700, Nikka Chemical Co., Ltd.'s Neoseed NR-158 and NR-7080, and Daikin Corporation's Unidyne XF5001 and XF5002. As silicone compounds, examples of Neoseed NR-8000 and NR-8800 from Nikka Chemical Co., Ltd. can be used.

[0037] The flame-retardant fabric of the present invention contains meta-type fully aromatic polyamide fibers and a non-fluorine-based water repellent as described above, and therefore possesses extremely excellent flame retardancy, as well as environmentally friendly water repellency and tear strength.

[0038] Here, it is important that the afterflame time in the combustion test specified by ISO 15025:2000A is 2 seconds or less. A residual time of 2.0 seconds or less is preferable. Furthermore, it is preferable that the water repellency measured by the JIS L 1092 spray method is grade 4 or higher. In addition, the fabric weight should be 120-300 g / m². 2 It is preferable that the water repellency is within the specified range. Furthermore, it is preferable that the water repellency measured by the JIS L 1092 spray method after 10 washes according to the JIS L0217 method (using JAFET standard detergent) is grade 3 or higher.

[0039] Furthermore, it is preferable that the tear strength in the warp or weft direction is 10N or more (more preferably 45-90N). It is also preferable that the tear strength decreases after the water repellent is removed. In particular, it is preferable that (fabric after water repellent application / fabric before water repellent application) is 1.1 or more (more preferably 1.1-1.5). The tear strength shall be measured by the method specified in JIS L1096D. The measurement method may be, for example, to measure the fabric before water repellent application, then apply the water repellent and measure the fabric after water repellent application, or to measure the tear strength of the fabric after water repellent application, then remove the water repellent from the fabric and measure the tear strength of the fabric before water repellent application.

[0040] Furthermore, it is preferable that the shrinkage rate (average of warp and weft) after five washes according to the method specified in ISO 5077 is 5% or less. It is also preferable that the heat shrinkage rate (average of warp and weft) after heat treatment at 180°C for 5 minutes according to ISO 17493 is 5% or less.

[0041] Next, the textile product of the present invention is one of the textile products selected from the group consisting of protective clothing, firefighting clothing, firefighting clothing, rescue clothing, workwear, police uniforms, Self-Defense Forces clothing, and military uniforms, made using the aforementioned fabric. Because such a textile product uses the aforementioned fabric, it has extremely excellent flame retardancy, as well as environmentally friendly water repellency and tear strength. [Examples]

[0042] The present invention will be described in detail below with reference to examples, but the present invention is not limited in any way by these examples. The physical properties in the examples were measured by the following methods.

[0043] (1) Measuring The measurement was performed using the method specified in JIS L 1096 Method A.

[0044] (2) Flammability Measurements were taken using the method specified in ISO 15025:2000 Method A.

[0045] (3) Water repellency The degree of water repellency (grade) was measured using the JIS L 1092 spray method.

[0046] (4) Dry heat shrinkage rate The thermal shrinkage rate was measured after heat treatment at 180°C for 5 minutes as specified in ISO 17493. Measurements were taken for both warp and weft for a sample size of 5, and the average of the two values ​​was calculated.

[0047] (5) Amount of remaining solvent Approximately 8.0 g of raw fiber was collected, dried at 105°C for 120 minutes, and then allowed to cool in a desiccator. The fiber mass (M1) was then weighed. Subsequently, this fiber was subjected to reflux extraction in methanol for 1.5 hours using a Soxhlet extractor to extract the amide solvent contained in the fiber. After extraction, the fiber was removed, vacuum-dried at 150°C for 60 minutes, and then allowed to cool in a desiccator. The fiber mass (M2) was then weighed. The amount of solvent remaining in the fiber (amide solvent mass) was calculated using the obtained M1 and M2 values ​​according to the following formula. Residual solvent amount (%) = [(M1-M2) / M1] × 100

[0048] (6) Degree of crystallinity Using an X-ray diffraction analyzer (Rigaku RINT TTRIII), the raw fibers were measured to a diameter of approximately 1 mm. The fiber bundles were aligned and mounted on a fiber sample stage, and the diffraction profile was measured. The measurement conditions were: The measurements were performed using a Cu-Kα source (50kV, 300mA), with a scanning angle range of 10-35°, continuous measurement with a 0.1° width, and scanning at 1° / min. The total scattering profile was obtained by correcting for air scattering and incoherent scattering using linear approximation from the measured diffraction profile. Next, the crystalline scattering profile was obtained by subtracting the amorphous scattering profile from the total scattering profile. The degree of crystallinity was determined from the area intensity (crystalline scattering intensity) of the crystalline scattering profile and the area intensity (total scattering intensity) of the total scattering profile using the following formula. Crystallinity (%) = [crystal scattering intensity / total scattering intensity] × 100

[0049] (7) Strong tear resistance of fabrics The fabric was measured before and after the application of a water-repellent agent using the method specified in JIS L1096D. The tear strength in the warp direction was measured with a sample size of 5, and the average value was used as the tear strength.

[0050] [Manufacturing of meta-type fully aromatic polyamide fibers] Meta-type all-aromatic polyamide fibers were prepared by the following method. 20.0 parts by mass of polymetaphenylene isophthalamide powder with an intrinsic viscosity (IV) of 1.9, produced by interfacial polymerization according to the method described in Japanese Patent Publication No. 47-10863, was suspended in 80.0 parts by mass of N-methyl-2-pyrrolidone (NMP) cooled to -10°C to form a slurry. Subsequently, the suspension was heated to 60°C to dissolve it and obtain a transparent polymer solution. To this polymer solution, 3.0% by mass of 2-[2H-benzotriazol-2-yl]-4-6-bis(1-methyl-1-phenylethyl)phenol powder (solubility in water: 0.01 mg / L) relative to the polymer and a phosphorus-based flame retardant were mixed and dissolved, and the mixture was removed by vacuum desorption to obtain a spinning solution (spinning dope).

[0051] [Spinning and Coagulation Process] The above spinning dope was extruded from a spinneret with a pore size of 0.07 mm and 500 pores into a coagulation bath at a bath temperature of 30°C and spun. The composition of the coagulation solution was water / NMP = 45 / 55 (parts by mass), and the yarn was extruded into the coagulation bath at a yarn speed of 7 m / min and spun.

[0052] [Plastic drawing bath drawing process] Subsequently, the material was stretched at a stretching ratio of 3.7 times in a plasticizing stretching bath with a water / NMP = 45 / 55 composition at a temperature of 40°C.

[0053] [Washing process] After stretching, the material was washed in a 20°C water / NMP=70 / 30 bath (immersion length 1.8m), followed by a 20°C water bath (immersion length 3.6m), and then thoroughly washed in a 60°C hot water bath (immersion length 5.4m).

[0054] [Dry heat treatment process] After washing, the fibers were subjected to dry heat treatment using a hot roller at a surface temperature of 280°C to obtain meta-type fully aromatic polyamide fibers.

[0055] [Physical properties of raw fibers] The obtained meta-type all-aromatic polyamide fibers had the following properties: single fiber fineness of 1.7 dtex, residual solvent content of 0.08 mass%, and crystallinity of 19%. Using the obtained raw fibers, crimping and cutting were performed to obtain staple fibers (raw cotton) with a length of 51 mm. The following materials were used for other fibers (raw cotton).

[0056] [Post-processing] The leather underwent post-processing including singeing, scouring, water-repellent treatment, and final setting. The water-repellent treatment was performed using the following method.

[0057] [Water-repellent treatment] A water repellent at a concentration of 50 g / L and a cross-linked water repellent at a concentration of 10 g / L were applied to a pad at a pickup rate of 60%, followed by a dry test (100°C, 3 minutes), and then a heat treatment at 170°C, 2 minutes. The water repellents used were: Example 1: Silicone-based water repellent, Example 2: Urethane-based water repellent, Example 3: Hydrocarbon-based water repellent, Comparative Example 1: Silicone-based water repellent, Comparative Example 2: Urethane-based water repellent, and Comparative Example 3: Fluorine-based water repellent.

[0058] [Example 1] Meta-type fully aromatic polyamide fiber (MA) (length 51 mm), conductive yarn (AS) (length 51 mm), and para-type fully aromatic polyamide fiber (PA) (length 51 mm) staple fibers are blended in a mass ratio of MA / AS / PA = 93 / 2 / 5 to produce a 40-count / ply yarn. This yarn is woven at a weave density of 95 threads / 25.4 mm warp and 60 threads / 25.4 mm weft, with a weight of 200 g / m². 2 A twill fabric was obtained. This was then processed using the method described above. The results are shown in Table 1.

[0059] [Example 2] This yarn is made from a blend of four staple fibers: meta-type fully aromatic polyamide fiber (MA) (length 51mm), flame-retardant rayon fiber (FR) (length 51mm), conductive yarn (AS) (length 51mm), and para-type fully aromatic polyamide fiber (PA) (length 51mm), in a mass ratio of MA / FR / AS / PA = 58 / 35 / 2 / 5. The resulting yarn is spun as a 40-count / ply yarn and woven at a weave density of 95 threads / 25.4mm warp and 60 threads / 25.4mm weft, with a weight of 200g / m². 2 A twill fabric was obtained. This was then processed using the method described above. The results are shown in Table 1.

[0060] [Example 3] Meta-type fully aromatic polyamide fiber (MA) (length 51 mm), polyester fiber (PET) (length 51 mm), conductive yarn (AS) (length 51 mm), and para-type fully aromatic polyamide fiber (PA) (length 51 mm) are blended in a mass ratio of MA / PET / AS / PA = 83 / 10 / 2 / 5 to produce a 40-count / ply yarn. This yarn is woven at a weave density of 95 threads / 25.4 mm warp and 60 threads / 25.4 mm weft, with a weight of 200 g / m². 2 A twill fabric was obtained. This was then processed using the method described above. The results are shown in Table 1.

[0061] [Comparative Example 1] The fabric is spun as a 40-count / ply yarn, blended with meta-type fully aromatic polyamide fibers (MA), cotton (CO), and para-type fully aromatic polyamide fibers (PA) in a ratio of MA / CO / PA = 85 / 10 / 5. It is woven at a density of 95 threads / 25.4mm in the warp and 60 threads / 25.4mm in the weft, with a weight of 200g / m². 2 A twill fabric was obtained. This was then processed using the method described above. The results are shown in Table 1.

[0062] [Comparative Example 2] The fabric is made from a blend of meta-type fully aromatic polyamide fibers (MA), flame-retardant rayon fibers (FR), cotton fibers (CO), para-type fully aromatic polyamide fibers (PA), and conductive yarn (AS) in a mass ratio of MA / FR / CO / PA / AS = 35 / 35 / 23 / 5 / 2. This spun yarn is 40 count / ply yarn, woven at a weave density of 95 threads / 25.4 mm warp and 60 threads / 25.4 mm weft, with a weight of 200 g / m². 2A twill fabric was obtained. This was then processed using the method described above. The results are shown in Table 1.

[0063] [Comparative Example 3] The procedure was the same as in Example 1, except that the water-repellent agent used was changed. The water-repellent agent used was an alkylfluoropolymer at a concentration of 100 g / L. The results are shown in Table 1.

[0064] [Table 1] [Industrial applicability]

[0065] According to the present invention, flame-retardant fabrics and textile products containing meta-type all-aromatic polyamide fibers are provided, possessing extremely excellent flame retardancy, environmentally friendly water repellency, and superior tear strength, thus having great industrial value.

Claims

1. A fabric containing 93% by weight or more of meta-type total aromatic polyamide fibers, containing a water-repellent agent containing a silicone-based compound, and having an afterflame time of 2 seconds or less in a combustion test specified by ISO 15025:2000A, and having a residual solvent content of 0.1% by mass or less in the meta-type total aromatic polyamide fibers. The fabric does not contain alkyl fluoropolymers, and the fabric weight is 200-300 g / m. ２ A flame-retardant fabric characterized by being within a certain range and having a tear strength of 45 N or more as measured by the method specified in JIS L1096D.

2. The flame-retardant fabric according to claim 1, wherein the fabric contains a blocked isocyanate.

3. A flame-retardant fabric according to claim 1 or 2, wherein the water repellency measured by the JIS L1092 spray method is grade 4 or higher.

4. A flame-retardant fabric according to any one of claims 1 to 3, wherein, after being washed 10 times according to the JIS L0217 method (using JAFET standard detergent), the water repellency measured by the JIS L1092 spray method is grade 3 or higher.

5. A flame-retardant fabric according to any one of claims 1 to 4, wherein the heat shrinkage rate when subjected to heat treatment at 180°C for 5 minutes as specified in ISO 17493 is 5% or less.

6. The flame-retardant fabric according to any one of claims 1 to 5, wherein the meta-type all-aromatic polyamide fiber comprises an organic dye, an organic pigment, or an inorganic pigment.

7. A flame-retardant fabric according to any one of claims 1 to 6, wherein the tear strength decreases after the removal of the water-repellent agent.

8. The flame-retardant fabric according to any one of claims 1 to 7, wherein the meta-type all-aromatic polyamide fiber has a crystallinity in the range of 15 to 50%.

9. A textile product made using a flame-retardant fabric as described in any of claims 1 to 8, selected from the group consisting of protective clothing, firefighting clothing, firefighting clothing, rescue clothing, workwear, police uniforms, Self-Defense Forces clothing, and military uniforms.

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