Fabric, method for manufacturing same, and fiber product

Patent metadata

Field	Value
Publication number	US-11078608-B2
Application number	US-201716346290-A
Country	US
Kind code	B2
Filing date	Oct 25, 2017
Priority date	Nov 1, 2016
Publication date	Aug 3, 2021
Grant date	Aug 3, 2021

Abstract

The invention addresses the problem of providing a cloth that is excellent not only in flame retardancy and antistatic properties but also in appearance quality and preferably also has protection performance against electric arcs, a method for producing the same, and a textile product. A means for resolution is a cloth including a meta-type wholly aromatic polyamide fiber and an electrically conductive fiber, wherein both the meta-type wholly aromatic polyamide fiber and the electrically conductive fiber are colored.

First claim

The invention claimed is:

1. A flame-retardant and antistatic cloth, comprising:
a meta-type wholly aromatic polyamide fiber, an electrically conductive acrylic fiber, and an additional fiber being at least one selected from the group consisting of para-type wholly aromatic polyamide fibers, polyphenylene sulfide fibers, polyimide fibers, polybenzimidazole fibers, polybenzoxazole fibers, polyamideimide fibers, polyetherimide fibers, and carbon fibers;
wherein the meta-type wholly polyamide fiber and the electrically conductive fiber are contained in the form of a blend-spun yarn, wherein the meta-type wholly aromatic polyamide fiber is within the range from 80 to less than 99 mass % relative to the cloth mass;
wherein the electrically conductive acrylic fiber is a sheath-core conjugate fiber including a core part containing electrically conductive carbon microparticles and a sheath part not containing any electrically conductive microparticles, wherein the electrically conductive acrylic fiber is within the range of greater than 1 to less than 20 mass % relative to the cloth mass;
wherein both the meta-type wholly aromatic polyamide fiber and the electrically conductive acrylic fiber are colored using the same cationic dye, such that a hue difference between the meta-type wholly aromatic polyamide fiber and the electrically conductive acrylic fiber is ΔE 3 or less,
wherein the cloth comprises an ATPV value in Arc Resistance Test ASTM F1959-1999 of 8.0 cal/cm2 or more, a frictional charge quantity of 7.0 μC/m2 as measured by a JS L1094-2014, C method, and an afterflame time of 1.0 second or less in a flammability measurement according to JIS L1091-1992,A-4 Method (12-second flame application).

2. The cloth according to claim 1 , wherein the range of the electrically conductive fiber is within 5 to 15 mass % relative to the cloth mass.

3. The cloth according to claim 2 , wherein the range of the electrically conductive fiber is within 10 to 15 mass % relative to the cloth mass.

4. The cloth according to claim 1 , wherein the additional fiber comprises para-type wholly aromatic polyamide fibers, the para-type wholly aromatic polyamide fibers within a range of 1 to 10 mass % relative to the cloth mass.

5. The cloth according to claim 1 , wherein the meta-type wholly aromatic polyamide fiber is made of a polymer wherein 85 mol % or more of the repeating unit is m-phenylene isophthalamide.

6. The cloth according to claim 5 , wherein the meta-type wholly aromatic polyamide fiber contains an alkylbenzenesulfonic acid onium salt, within a range of 2.5 mol % or more relative to a total amount of m-phenylene isophthalamide units.

7. The cloth according to claim 6 , wherein the polymer is a copolymer further comprising an aromatic diamine component or aromatic dicarboxylic acid halide component, different from a main unit, in a range of less than 15 mol % relative to a total amount of repeating structural units in the copolymer.

8. The cloth according to claim 1 , wherein the residual solvent content of the meta-type wholly aromatic polyamide fiber is 0.1 mass % or less.

9. The cloth according to claim 1 , wherein the meta-type wholly aromatic polyamide fiber has a crystallinity of 5 to 35%.

10. The cloth according to claim 9 , wherein the crystallinity is 15 to 25%.

11. The cloth according to claim 10 , wherein the crystallinity is 15 to 19%.

12. The cloth according to claim 1 , wherein an electrically conductive carbon microparticle content of the core part is 20 to 60 mass % and the electrically conductive acrylic fiber comprises a single-fiber resistivity is 10 1 to 10 6 Ω·cm.

13. The cloth according to claim 1 , wherein the cationic dye is azo dye.

14. The cloth according to claim 10 , wherein the azo dye is selected from the group consisting of C.I. Basic Blue 54, C.I. Basic Blue 3, C.I. Basic Red 29, and C.I. Basic Yellow 67.

15. The cloth according to claim 1 , wherein a fiber length of each fiber of the blend-spun yarn is 25 to 200 mm.

16. The cloth according to claim 1 , wherein the blend-spun yarn comprises a fineness being a cotton count (Ecc) of 20 to 80 and comprises a twist coefficient, wherein the twist coefficient is expressed by the following equation:
twist coefficient=number of twists per 2.54 cm/Ecc 1/2 within a range of 3.6 to 4.2.

17. The cloth according to claim 1 , wherein the cloth has a weight per unit area within a range of 3.0 to 9.0 yd/oz 2 and a thickness of at least 0.30 mm.

18. The cloth according to claim 1 , wherein the cloth comprises a woven structure comprising warp yarns and weft yarns, wherein each of the warp yarns and the weft yarns comprise the blend-spun yarn.

19. The cloth according to claim 18 , wherein the woven structure comprises a warp density of 60 to 80 yarns/2.54 cm and a weft density of 60 to 80 yarns/2.54 cm.

20. A wearable textile product comprising the cloth according to claim 1 , selected from the group consisting of protective garments, workgarments, fireproof garments, camouflage uniforms, happi coats, and aprons.

Assignees

• Teijin Ltd

Inventors

• Tanaka Kengo
• Shimada Hiroki
• Iwashita Kenji
• Yoshihara Kenji

Classifications

• D10B2401/14

  Dyeability · CPC title

• D10B2331/021

  aromatic polyamides, e.g. aramides · CPC title

• D10B2321/08

  polymers of unsaturated carboxylic acids or unsaturated organic esters, e.g. polyacrylic esters, polyvinyl acetate · CPC title

• D03D15/54 Primary

  coloured · CPC title

• D03D15/533

  antistatic; electrically conductive · CPC title