JP2018021275A - Laminated cloth and fiber product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide laminated cloth which is made of cloth of two or more layers and has extremely excellent flame retardancy and stretchability and provide a fiber product.SOLUTION: The laminated cloth is made of cloth of two or more layers, in which at least one layer is made of cloth A including meta-type wholly aromatic polyamide fiber and stretch yarn, with afterflame time in combustibility measurement regulated by a JIS L1091-1992A-4 method of 2.0 seconds or less and an expansion rate of at least one of warp and weft of 8% or more. The expansion rate is measured by a JIS L1096-1990 6.14.1A method.SELECTED DRAWING: None

Description

  The present invention relates to a laminated fabric composed of two or more layers of fabric, and relates to a laminated fabric and a fiber product having extremely excellent flame retardancy and stretchability.

Conventionally, fabrics containing meta-type wholly aromatic polyamide fibers are excellent in flame retardancy, and are therefore used as protective clothing such as work clothes and fire fighting clothes. For example, Patent Document 1 and Patent Document 2 propose protective clothing made of a laminated fabric in which a fabric containing such a meta-type wholly aromatic polyamide fiber is arranged on the surface layer.
On the other hand, there is a need for even better wearing comfort in such protective clothing.

International Publication No. 2012/053460 Pamphlet JP 2014-91307 A

  The present invention has been made in view of the above background, and an object of the present invention is to provide a laminated fabric composed of two or more layers of fabric, and a laminated fabric and a textile product having extremely excellent flame retardancy and stretchability. There is.

  As a result of intensive studies to achieve the above-mentioned problems, the inventors of the present invention have extremely excellent flame retardancy and stretchability by constituting a fabric using a composite yarn including a meta-type wholly aromatic polyamide fiber and a stretchable yarn. As a result, the present invention has been completed.

Thus, according to the present invention, “a laminated fabric composed of two or more layers, wherein at least one layer includes a meta-type wholly aromatic polyamide fiber and a stretch yarn, and is defined in JIS L1091-1992 A-4 method. A laminated fabric characterized in that it comprises a fabric A having a residual flame of 2.0 seconds or less and a degree of elongation of at least either one of 8% or more.
However, the elongation rate is measured by the JIS L1096-1990 6.14.1A method.

In that case, in the said fabric A, it is preferable that carbonization length is 100 mm or less in the combustibility measurement prescribed | regulated to JISL1091-1992 A-4 method. Further, in the fabric A, it is preferred basis weight in the range of 5~7oz / yd ^2. Moreover, in the said fabric A, it is preferable that the air permeability measured by JISL1096-19906.27 fragile method is 10 cm < ³ > / cm < ² > / sec or more. The fabric A preferably has a tensile strength retention of 60% or more measured in accordance with JIS L1096-1990 6.12 after being left for 14 days in an environment of humidity 95% RH and room temperature 70 ° C. . The meta-type wholly aromatic polyamide fiber preferably contains an organic dye, an organic pigment, or an inorganic pigment. The stretch yarn is preferably a composite fiber, an elastic fiber or a false twist crimped yarn. The fabric A preferably includes a composite yarn containing a meta-type wholly aromatic polyamide fiber and a stretch yarn.

  In the laminated fabric of the present invention, the fabric A further comprises para-type wholly aromatic polyamide fiber, wholly aromatic polyester fiber, polybenzoxazole (PBO) fiber, polybenzimidazole (PBI) fiber, polybenzthiazole (PBTZ) fiber, Polyimide (PI) fiber, polysulfonamide (PSA) fiber, polyether ether ketone (PEEK) fiber, polyetherimide (PEI) fiber, polyarylate (PAr) fiber, melamine fiber, phenol fiber, fluorine-based fiber, and polyphenylene sulfide It is preferable to include any one or more selected from the group consisting of (PPS) fibers. The fabric A is further selected from the group consisting of cellulose fiber, polyolefin fiber, acrylic fiber, rayon fiber, cotton fiber, animal hair fiber, polyurethane fiber, polyvinyl chloride fiber, polyvinylidene chloride fiber, acetate fiber and polycarbonate fiber. It is preferable to include any one or more of the above. Further, in the laminated fabric, it is preferable that the heat transfer index HTI24 is 13 seconds or more in the heat transfer property (flame exposure) measurement specified in ISO 9151.

  Further, according to the present invention, any one selected from the group consisting of protective clothing, fire-fighting clothing, fire-fighting clothing, rescue clothing, workwear, police uniforms, self-defense forces clothing, and military clothing is formed using the laminated fabric. A textile product is provided.

  According to the present invention, a laminated fabric composed of two or more layers of fabric, and a laminated fabric and a fiber product having extremely excellent flame retardancy and stretchability can be obtained.

Hereinafter, embodiments of the present invention will be described in detail. First, the meta-type wholly aromatic polyamide fiber used in the present invention is a fiber made of a polymer in which 85 mol% or more of the repeating units is m-phenylene isophthalamide. Such a meta-type wholly aromatic polyamide may be a copolymer containing a third component within a range of less than 15 mol%.
Such a meta-type wholly aromatic polyamide can be produced by a conventionally known interfacial polymerization method, and the degree of polymerization of the polymer is an N-methyl-2-pyrrolidone solution having a concentration of 0.5 g / 100 ml. Those having a measured intrinsic viscosity (IV) in the range of 1.3 to 1.9 dl / g are preferably used.

  The meta-type wholly aromatic polyamide may contain an onium salt of alkylbenzene sulfonic acid. Examples of the onium salt of alkylbenzene sulfonate include tetrabutyl phosphonium salt of hexyl benzene sulfonate, tributyl benzyl phosphonium salt of hexyl benzene sulfonate, tetraphenyl phosphonium salt of dodecyl benzene sulfonate, tributyl tetradecyl phosphonate of dodecyl benzene sulfonate. Preferred examples include compounds such as a nium salt, tetrabutylphosphonium salt of dodecylbenzenesulfonate, and tributylbenzylammonium salt of dodecylbenzenesulfonate. Among them, dodecylbenzenesulfonic acid tetrabutylphosphonium salt or dodecylbenzenesulfonic acid tributylbenzylammonium salt is particularly easy to obtain and has good thermal stability and high solubility in N-methyl-2-pyrrolidone. Preferably exemplified.

  The content ratio of the onium salt of alkylbenzene sulfonate is 2.5 mol% or more, preferably 3.0 to 7.0 mol with respect to poly-m-phenyleneisophthalamide in order to obtain a sufficient dyeing effect. Those in the range of% are preferred.

  In addition, as a method of mixing poly-m-phenylene isophthalamide and alkylbenzenesulfonic acid onium salt, a method of mixing and dissolving poly-m-phenyleneisophthalamide in a solvent and dissolving alkylbenzenesulfonic acid onium salt in the solvent. Any of these may be used. The dope thus obtained is formed into fibers by a conventionally known method.

The polymer used for the meta-type wholly aromatic polyamide fiber has a repeating structure in an aromatic polyamide skeleton containing a repeating structural unit represented by the following formula (2) for the purpose of improving dyeability and resistance to discoloration. It is also possible to copolymerize an aromatic diamine component or aromatic dicarboxylic acid halide component different from the main structural unit of 1 to 10 mol% with respect to the total amount of the repeating structural units of the aromatic polyamide as the third component. It is.
-(NH-Ar1-NH-CO-Ar1-CO) -... Formula (1)
Here, Ar1 is a divalent aromatic group having a bonding group other than in the meta-coordinate or parallel axis direction.

Moreover, 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, Examples include acetylphenylenediamine, aminoanisidine, benzidine, bis (aminophenyl) ether, bis (aminophenyl) sulfone, diaminobenzanilide, diaminoazobenzene, and the like. 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 Examples include '-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 it is a functional group and X represents a halogen atom.

  Further, the crystallinity of the meta-type wholly aromatic polyamide fiber is 5 to 35% in that the dye exhaustion is good and it is easy to adjust to the target color even with less dye or weak dyeing conditions. Preferably there is. Further, it is more preferably 15 to 25% in that the surface uneven distribution of the dye hardly occurs, the discoloration resistance is high, and the dimensional stability necessary for practical use can be secured.

  Further, the meta type wholly aromatic polyamide fiber may contain a flame retardant. Examples of the flame retardant to be used include those described in JP-A-10-251981, inorganic metals and carriers, and those coated on the surface of metal-containing carriers. A phosphorus flame retardant is preferred. The content is preferably 1 to 15% by weight relative to the fiber weight.

Further, the meta-type wholly aromatic polyamide fiber may contain an organic dye, an organic pigment, or an inorganic pigment.
Further, the residual solvent amount of the meta-type wholly aromatic polyamide fiber is 0.1% by weight or less (preferably 0.001 to 0.1) in that the excellent flame retardancy of the meta-type wholly aromatic polyamide fiber is not impaired. % By weight).

The meta-type wholly aromatic polyamide fiber can be produced by the following method. In particular, the crystallinity and the residual solvent amount can be adjusted to the above ranges by the method described later.
The polymerization method of the meta-type wholly aromatic polyamide polymer is not particularly limited. For example, the solution weight described in Japanese Patent Publication No. 35-14399, US Pat. No. 3,360,595, Japanese Patent Publication No. 47-10863, etc. A combination method or an interfacial polymerization method may be used.

The spinning solution is not particularly limited, but an amide solvent solution containing an aromatic copolyamide polymer obtained by the above solution polymerization or interfacial polymerization may be used, or the polymer may be removed from the polymerization solution. You may use what was isolated and melt | dissolved in the amide-type solvent.
Examples of the amide solvent used here include N, N-dimethylformamide, N, N-dimethylacetamide, N-methyl-2-pyrrolidone, dimethyl sulfoxide and the like, and in particular, N, N-dimethylacetamide. Is preferred.

The copolymerized aromatic polyamide polymer solution obtained as described above is preferably 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. Preferably, the alkali metal salt and alkaline earth metal salt are 1% by weight or less, more preferably 0.1% by weight or less, based on the total weight of the polymer solution. In that case, you may include the above flame retardants.
In the spinning / coagulation step, the spinning solution (meta-type wholly aromatic polyamide polymer solution) obtained above is spun into a coagulating solution and coagulated.

The spinning device is not particularly limited, and a conventionally known wet spinning device can be used. Further, the number of spinning holes, the arrangement state, the hole shape and the like of the spinneret are not particularly limited as long as they can be stably wet-spun. For example, the number of holes is 1,000 to 30,000, and the spinning hole diameter is 0.05. A multi-hole spinneret for ˜0.2 mm sufu may be used.
The temperature of the spinning solution (meta-type wholly aromatic polyamide polymer solution) when spinning from the spinneret is suitably in the range of 20 to 90 ° C.

  As a coagulation bath used for obtaining fibers, an amide solvent, which is substantially free of inorganic salts, preferably an aqueous solution having a concentration of NMP of 45 to 60% by mass within a temperature range of the bath solution of 10 to 50 ° C. Use. When the concentration of the amide solvent (preferably NMP) is less than 45% by mass, the skin has a thick structure, the cleaning efficiency in the cleaning step is lowered, and it is difficult to reduce the residual solvent amount of the fiber. On the other hand, when the concentration of the amide solvent (preferably NMP) exceeds 60% by mass, uniform coagulation cannot be performed up to the inside of the fiber, and therefore, the residual solvent amount of the fiber can be reduced. It becomes difficult. In addition, the range of 0.1-30 seconds is suitable for the immersion time of the fiber in a coagulation bath.

Subsequently, it is an aqueous solution having an amide solvent, preferably an NMP concentration of 45 to 60% by mass, and a stretch ratio of 3 to 4 times in a plastic stretching bath in which the temperature of the bath liquid is in the range of 10 to 50 ° C. Stretching is performed. After stretching, the film is thoroughly washed through an aqueous solution having an NMP concentration of 20 to 40% by mass at 10 to 30 ° C. and then a hot water bath at 50 to 70 ° C.
The washed fibers can be subjected to a dry heat treatment at a temperature of 270 to 290 ° C. to obtain meta-type wholly aromatic aramid fibers that satisfy the above-mentioned ranges of crystallinity and residual solvent amount.

In the meta-type wholly aromatic aramid fiber, 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 in blending with other fibers. The single fiber fineness is preferably in the range of 1 to 5 dtex.
Examples of the stretch yarn used in the present invention include elastic fibers such as polyurethane fibers and polyetherester fibers, false twisted crimped yarns made of polyester fibers, composite fibers, and the like.

  The composite fiber is a composite fiber in which two components are bonded together in a side-by-side type or an eccentric core-sheath type. In the heat treatment step of the fabric, the composite fiber takes the form of a three-dimensional coil crimp, and the stretchability is imparted to the composite yarn. As a result, the stretchability is imparted to the fabric. Examples of the two components forming the composite fiber include a combination of polyester and polyester, a combination of polyester and nylon, and the like. More specifically, a combination of polytrimethylene terephthalate and polytrimethylene terephthalate, a combination of polytrimethylene terephthalate and polyethylene terephthalate, a combination of polyethylene terephthalate and polyethylene terephthalate, or the like is preferable. As for commercially available polyurethanes, Asahi Kasei's “Roika” (trade name), and in combination with polyester and polyurethane, Asahi Kasei's “Election Pro” (trade name), “Spiel” (trade name), and polyester Kuraray "Viewfit" (product name), "Purune" (product name), Teijin's "Esviron" (product name), "Tricyclone" (product name), "Solotex" (product name), Toyobo Specialty “Lacrosse” (trade name), “Technista” (trade name), etc., manufactured by Z Trading Co., Ltd. are exemplified.

  The fabric A preferably includes a composite yarn containing a meta-type wholly aromatic polyamide fiber and a stretch yarn. At that time, the composite yarn includes a twisted yarn composed of a meta-type wholly aromatic polyamide fiber and a stretch yarn, a covering yarn obtained by covering the stretch yarn with the meta-type wholly aromatic polyamide fiber, and a meta-type wholly aromatic polyamide fiber as a short fiber. A long / short composite yarn (core yarn) in which a stretch yarn is arranged in the core and a stretch yarn is preferably used.

Here, as described in Japanese Patent Application Laid-Open No. 2001-164432, the core yarn supplies a drafted fiber bundle (sheath fiber) and stretch yarn (core fiber) to the nozzle block and the hollow guide shaft body, and is hollow. By causing a swirling airflow to act on the tip of the guide shaft body, the sheath fiber is substantially covered over the entire length of the core fiber while inverting the rear end of the fiber constituting the fiber bundle and winding it around the tip of the hollow guide shaft body. It is a composite yarn wound uniformly.
In that case, as the stretch yarn arranged in the core part (core fiber), the above composite fiber is preferable.

The present invention is a laminated fabric composed of two or more layers of fabric, and at least one layer is composed of a fabric including the meta-type wholly aromatic polyamide fiber and the stretch yarn as described above. In the present invention, such a fabric containing a meta-type wholly aromatic polyamide fiber is referred to as “fabric A”.
In the fabric A, the stretch yarn content is preferably 50% by weight or less (more preferably 1 to 25% by weight).

In addition to fabric A, para-type wholly aromatic polyamide fiber, wholly aromatic polyester fiber, polybenzoxazole (PBO) fiber, polybenzimidazole (PBI) fiber, polybenzthiazole (PBTZ) fiber, polyimide (PI) fiber, polysulfone Difficulties such as amide (PSA) fiber, polyether ether ketone (PEEK) fiber, polyetherimide (PEI) fiber, polyarylate (PAr) fiber, melamine fiber, phenol fiber, fluorine-based fiber, and polyphenylene sulfide (PPS) fiber It is preferable that 1 or more types of fuel fiber are contained.
At that time, in such flame retardancy, the limiting oxygen index LOI value is preferably 20 or more.

  Further, the fabric A is further selected from the group consisting of cellulose fiber, polyolefin fiber, acrylic fiber, rayon fiber, cotton fiber, animal hair fiber, polyurethane fiber, polyvinyl chloride fiber, polyvinylidene chloride fiber, acetate fiber and polycarbonate fiber. It is preferable that any one or more of these are included.

Here, in the fabric A, it is important that at least one of the processes has an elongation rate of 8% or more (preferably 8 to 22%). If the elongation rate is less than 8%, there is a possibility that excellent wearing comfort cannot be obtained. However, the elongation rate is measured by the JIS L1096-1990 6.14.1A method.
In order to obtain a fabric having the elongation rate as described above, for example, a composite yarn composed of a meta-type wholly aromatic polyamide fiber and a stretch yarn may be included in the fabric.

  The fabric structure of the fabric A is not particularly limited, but is preferably a woven fabric or a knitted fabric. Examples of the woven fabric include a plain structure, a twill structure, and a satin structure. Examples of the knitted fabric include machine knitting, crochet knitting, stick knitting, Afghan knitting, and lace knitting. For example, in the case of a woven fabric, the total amount of the composite yarn may be arranged in the warp direction and / or the weft direction, or the composite yarn and other yarns may be, for example, 1: 1, 2: 1, 3: 1. , 1: 2 and 1: 3. The method for knitting and weaving is not particularly limited, and a method using a normal knitting machine or loom may be used.

Subsequently, the fabric A is subjected to heat treatment such as refining, relaxation, dyeing treatment, and set, so that the composite fiber in which the two components contained in the fabric A are bonded to the side-by-side type or the eccentric core-sheath type is formed into a three-dimensional coil cage. It takes the form of contraction and gives stretchability to the fabric.
The fabric A is provided with functions such as water absorption, water repellent, brushed, flame retardant, ultraviolet shielding or antibacterial agent, deodorant, insect repellent, phosphorescent agent, retroreflective agent, and negative ion generator. Various processing may be additionally applied.

Since the fabric type A contains meta-type wholly aromatic polyamide fibers, it has excellent flame retardancy. At that time, it is important that the afterflame is 2.0 seconds or less in the flammability measurement prescribed in JIS L1091-1992 A-4 method.
In the fabric A, the carbonization length is preferably 100 mm or less (more preferably 10 to 80 mm) in the flammability measurement defined in the JIS L1091-1992 A-4 method.

Moreover, in the said fabric A, it is preferable that a fabric weight is in the range of 5-7 oz / yd < ² >, in order to make lightweight property and heat insulation compatible.
In the fabric A, when the air permeability measured by the JIS L1096-1990 6.27 Frazier method is 10 cm ³ / cm ² · sec or more (preferably 10 to 100 cm ³ / cm ² · sec), the wearing comfort is improved. It is preferable.

  The fabric A preferably has a tensile strength retention of 60% or more measured in accordance with JIS L1096-1990 6.12 after being left for 14 days in an environment of humidity 95% RH and room temperature 70 ° C. . One week of this test corresponds to one year of annual exposure time in Japan.

In the laminated fabric of the present invention, the configuration of the laminated fabric is not particularly limited, but as described in International Publication No. 2012/053460 pamphlet, a surface layer, an intermediate layer having a moisture permeable waterproof function, and / or a heat shield. It preferably consists of layers. In particular, the surface layer is preferably made of the fabric A.
Here, as the intermediate layer, an excellent moisture permeable waterproof function and resistance to water can be obtained by using a woven or knitted fabric obtained by further laminating or coating a moisture permeable waterproof layer film such as polytetrafluoroethylene. Chemical properties can also be imparted.

  Further, the heat shielding layer is shrunk by mixing 2 to 20% or less of highly shrinkable fibers and bringing the heat shielding layer structure into contact with the wet and dry heat conditions of 80 ° C. or higher, and the thickness is increased (bulky). It is preferable to obtain a thermal layer. In order to obtain a bulky heat-shielding layer, for example, when used in warp for textile manufacturing (design arrangement), when it comes into contact with wet and dry heat conditions of 80 ° C. or higher, shrinkage occurs in the warp direction, resulting in a markedly bulky light-shielding layer. A thermal layer is obtained, and a knitted fabric such as a heat insulating cushioning material (air packing) can be obtained by alternately arranging highly shrinkable fibers and fibers that are not.

Since the laminated fabric of the present invention contains the fabric A, it has extremely excellent flame retardancy and stretchability.
At that time, in the heat transfer (flame exposure) test (IS09151) in European Approach A (Section 4) described in IS011613, it is preferable that the time (HTI24) required to increase the temperature by 24 ° C. is 13 seconds or more. In addition, in the heat transfer (flame exposure) test (IS09151) in European approach A (Section 4) described in IS011613, the time required to increase the temperature by 24 ° C. (RHTI24) and the time required to increase the temperature by 12 ° C. The difference from RHTI12) is preferably 4 seconds or more. Further, in the (radiation + flame exposure) test (IS017492) in North American Approach B (Section 5) described in IS011613, it is preferable that the time (TPP) required to increase the temperature by 24 ° C. is 17.5 seconds or more.
The basis weight of the laminated fabric is preferably 400 to 600 g / m ² .

  Next, the textile product of the present invention is selected from the group consisting of protective clothing, fire fighting clothing, fire fighting clothing, rescue clothing, workwear, police uniforms, self-defense clothing, and military clothing using the laminated fabric. One of the textile products. Since such a fiber product uses the above-mentioned laminated fabric, it has extremely excellent flame retardancy and stretchability.

EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in detail, this invention is not limited at all by these. In addition, each physical property in an Example is measured with the following method.
(1) Flame retardancy of fabric (vertical combustion test)
Afterflame time and carbonization length were measured by JIS L1091-1992 A-4 method.
(2) Stretchability (elongation rate)
It measured by JIS L1096-1990 6.14.1A method.
(3) Air permeability JIS L1096-1990 6.27 It measured by the fragile method.
(4) Strength retention The tensile strength before and after being left for 14 days in an environment of humidity 95% RH and room temperature 70 ° C. was measured according to JIS L1096-1990 6.12, and calculated according to the following formula.
Strength retention (%) = tensile strength after standing / tensile strength before standing × 100
(5) Limit oxygen index LOI value The limit oxygen index LOI value was measured by the JIS L1091-1999 E method.

[Example 1]
As a spun yarn, in the spinning process, from polymetaphenylene isophthalamide fiber (“Conex” (trade name) manufactured by Teijin Limited) having a single fiber fineness of 2.2 dtex, a cut length (fiber length) of 51 mm, and a LOI value of 33 Short fiber, coparaphenylene 3,4'oxydiphenylene terephthalamide fiber with a single fiber fineness of 1.7 dtex, a cut length (fiber length) of 51 mm, and a LOI value of 25 (“Technola” manufactured by Teijin Limited) Name)) is blended at a weight ratio (the former: the latter) of 95: 5, the number of twists is 20.87 T / 2.54 cm (twisting coefficient = 3.3), and the number is 40 by single cotton count. I got a thread.

Next, the two spun yarns are combined, twisted with a double twister at an upper twist number of 20.9 T / 2.54 cm, and then set in a vacuum steam setting machine at a setting temperature of 120 ° C. and a setting time of 20 minutes. The flame retardant combined twisted yarn A was obtained.
On the other hand, as a composite fiber, a multifilament having a total fineness of 40 dtex / 24 filaments obtained by bonding two types of polytrimethylene terephthalate having different intrinsic viscosities in an eccentric core-sheath type, an elongation of 26%, and a boiling water shrinkage of 55.0% ( Long fibers).
Next, two spun yarns and one composite fiber (multifilament) are combined and twisted with a double twister at an upper twist number of 19.8 T / 2.54 cm, and then with a vacuum steam set machine A twisted set was made under the conditions of a set temperature of 80 ° C. and a set time of 20 minutes to obtain a composite yarn B.

Next, 100% of the flame retardant twisted yarn A is arranged on the warp, and 100% of the composite yarn B is arranged on the weft, and the fabric density is warp 48 / 2.54 cm, weft 48 / 2.54 cm. Woven with plain weave. The woven fabric was subjected to a finishing process of scouring-relaxing-set (temperature 190 ° C. × time 30 seconds). Here, the relaxation temperature was set to 95 ° C., and by imparting a strong stagnation effect, crimping of the composite fiber was well expressed, and in particular, stretch properties were expressed.
In the obtained stretch flame retardant fabric, the fabric density is warp 55 / 2.54 cm, weft 48 / 2.54 cm, the weight ratio of non-flame retardant fiber is 6.0 wt%, the critical oxygen index is 29.0, weft The stretch rate was 7.0% and good stretchability was obtained, and the stretch recovery rate was 75%. The evaluation results are shown in Table 1. Subsequently, when working clothes were obtained using the stretchable flame-retardant woven fabric (fabric A), it was excellent in stretchability and flame retardancy.

Next, the fabric A was used as a surface layer, and an intermediate layer and a heat shielding layer were produced as follows to obtain a laminated fabric.
The intermediate layer consists of a meta-type wholly aromatic polyamide fiber (“Conex” (trade name) manufactured by Teijin Limited, original yarn name c / # NB32.2T51), coparaphenylene 3,4′oxydiphenylene terephthalate Using spun yarn (mixed cotton ratio meta 95: para 5, para. 40/1) made of amide fiber (manufactured by Teijin Ltd., Technora, brand T330BK1.7T51), weaving and finishing by a conventional method, polytetrafluoro A laminate of an ethylene moisture-permeable waterproof film (Japan Gore-Tex) was used to obtain a moisture-permeable waterproof layer having a basis weight of 120 g / cm ² .

The heat-shielding layer is composed of meta-type wholly aromatic polyamide fiber (“Conex” (trade name) manufactured by Teijin Limited, original yarn brand name c / # NB32.2T51), coparaphenylene and 3,4′oxydiphenylene. Spinned yarn (mixed cotton ratio Meta 95: Para 5, count 40/1) made of terephthalamide fiber (“Technola” (trade name) manufactured by Teijin Ltd., brand name T330BK1.7T51), and the spun yarn and boiling water shrinkage 30% Of polyester filaments (made by Teijin Ltd., brand TFYN301SDC33T12) are alternately warped, and the wefts are spun yarns in the structure of International Publication No. 2012/053460 pamphlet, Fig. 3, warp 88 / 2.54cm Weaving at 90 weft / 2.54 cm, paste scouring and finishing were performed to obtain a heat shielding layer with a basis weight of 129 g / cm ² .
The obtained surface layer, intermediate layer and heat shield layer were washed 5 times, and after measuring the thickness of the three layers laminated, the heat shield property and the like were evaluated. The results are shown in Table 1.
Subsequently, when the fire fighting clothing was obtained using the laminated fabric, it had extremely excellent flame retardancy and stretchability.

[Example 2]
As a spun yarn, it consists of polymetaphenylene isophthalamide fiber (“Conex” (trade name) manufactured by Teijin Limited) having a single fiber fineness of 2.2 dtex, a cut length (fiber length) of 51 mm, and a LOI of 33 in the spinning process. Short fiber, coparaphenylene 3,4'oxydiphenylene terephthalamide fiber (trade name “Tenora” manufactured by Teijin Limited) having a single fiber fineness of 1.7 dtex, a cut length (fiber length) of 51 mm, and a LOI of 25 ), Short fibers made of polyethylene terephthalate fibers (manufactured by Teijin Limited) having a single fiber fineness of 1.7 dtex, a cut length (fiber length) of 51 mm, and a LOI value of 21, and a weight ratio of 80 in this order: The blend was spun at a ratio of 5:15, and the number of twists was 20.87 T / 2.54 cm (twisting coefficient = 3.3), and the number 40 single yarn was obtained with an English cotton count. The rest was the same as in Example 1. The evaluation results are shown in Table 1.

[Comparative Example 1]
In Example 1, the composite yarn B was not used, and the same procedure as in Example 1 was carried out except that 100% of the flame retardant combined twisted yarn A was woven into the warp and weft.

[Comparative Example 2]
Example 1 was the same as Example 1 except that the meta-type wholly aromatic aramid fibers and para-type wholly aromatic polyamide fibers were changed to polyethylene terephthalate (PET) fibers.

[Comparative Example 3]
In Example 1, it replaced with the composite yarn B, and it carried out similarly to Example 1 except having used the polyurethane (PU) fiber.

  According to the present invention, there is provided a laminated fabric composed of two or more layers of fabric, and has an extremely excellent flame retardancy and stretchability, and a textile product, and its industrial value is extremely large.

Claims (12)

A laminated fabric composed of two or more layers, wherein at least one layer includes a meta-type wholly aromatic polyamide fiber and a stretch yarn, and afterflame in a flammability measurement specified in JIS L1091-1992 A-4 method Is a laminated fabric characterized in that it is made of a fabric A having an elongation of 8% or more.
However, the elongation rate is measured by the JIS L1096-1990 6.14.1A method.   The laminated fabric according to claim 1, wherein the fabric A has a carbonization length of 100 mm or less in the flammability measurement specified in JIS L1091-1992 A-4 method. The laminated fabric according to claim 1 or ² , wherein the fabric A has a basis weight within a range of 5 to 7 oz / yd2. Wherein the fabric A, JIS L1096-1990 6.27 Frazier air permeability as measured by method is 10cm ³ / ^cm 2 · sec or more, laminated fabric according to claim 1.   In the fabric A, the tensile strength retention measured according to JIS L1096-1990 6.12 after standing for 14 days in an environment of humidity 95% RH and room temperature 70 ° C is 60% or more. The laminated fabric according to any one of 4 above.   The laminated fabric according to any one of claims 1 to 5, wherein the meta-type wholly aromatic polyamide fiber includes an organic dye, an organic pigment, or an inorganic pigment.   The laminated fabric according to any one of claims 1 to 6, wherein the stretch yarn is a composite fiber, an elastic fiber, or a false twist crimped yarn.   The laminated fabric according to any one of claims 1 to 7, wherein the fabric A includes a composite yarn including a meta-type wholly aromatic polyamide fiber and a stretch yarn.   Fabric A further includes para-type wholly aromatic polyamide fiber, wholly aromatic polyester fiber, polybenzoxazole (PBO) fiber, polybenzimidazole (PBI) fiber, polybenzthiazole (PBTZ) fiber, polyimide (PI) fiber, polysulfone. Group consisting of amide (PSA) fiber, polyether ether ketone (PEEK) fiber, polyetherimide (PEI) fiber, polyarylate (PAr) fiber, melamine fiber, phenol fiber, fluorine-based fiber, and polyphenylene sulfide (PPS) fiber The laminated fabric according to any one of claims 1 to 8, comprising any one or more selected from the above.   The fabric A is further selected from the group consisting of cellulose fiber, polyolefin fiber, acrylic fiber, rayon fiber, cotton fiber, animal hair fiber, polyurethane fiber, polyvinyl chloride fiber, polyvinylidene chloride fiber, acetate fiber and polycarbonate fiber The laminated fabric according to any one of claims 1 to 8, comprising at least one kind.   The laminated fabric according to any one of claims 1 to 10, wherein in the laminated fabric, the heat transfer index HTI24 is 13 seconds or more as measured by heat transferability (flame exposure) specified in ISO 9151.   A laminated fabric according to any one of claims 1 to 11, which is selected from the group consisting of protective clothing, fire-fighting clothing, fire-fighting clothing, rescue clothing, workwear, police uniforms, SDF clothing, and military clothing. One of the textile products.