Electroconductive composite fibers and fiber structure using same

Patent metadata

Field	Value
Publication number	US-2022112630-A1
Application number	US-202117555820-A
Country	US
Kind code	A1
Filing date	Dec 20, 2021
Priority date	Jun 27, 2019
Publication date	Apr 14, 2022
Grant date	—

Abstract

Provided is an electroconductive composite fiber having excellent antistatic capability and cationic dyability as well as a fiber structure including the same. The electroconductive composite fiber at least includes an electroconductive layer and a non-electroconductive layer disposed in contact with the electroconductive layer, wherein the electroconductive layer contains an electroconductive substance, and the non-electroconductive layer contains a modified polyester comprising a phosphonium-containing dicarboxylic acid component as a copolymerization component.

First claim

What is claimed is:

1 . An electroconductive composite fiber at least comprising an electroconductive layer and a non-electroconductive layer disposed in contact with the electroconductive layer,
wherein the electroconductive layer contains an electroconductive substance, and the non-electroconductive layer contains a modified polyester comprising a phosphonium-containing dicarboxylic acid component as a copolymerization component.

2 . The electroconductive composite fiber according to claim 1 , wherein the copolymerization component of the modified polyester is a dicarboxylic acid component containing a phosphonium sulfonate group.

3 . The electroconductive composite fiber according to claim 2 , wherein the copolymerization component of the modified polyester is a phosphonium sulfoisophthalate component.

4 . The electroconductive composite fiber according to claim 1 , wherein the modified polyester contains the phosphonium-containing dicarboxylic acid component as the copolymerization component in a proportion of from 1.0 to 3.5 mol % based on a total amount of all dicarboxylic acid components.

5 . The electroconductive composite fiber according to claim 1 , wherein the modified polyester has an intrinsic viscosity of from 0.6 to 0.8.

6 . The electroconductive composite fiber according to claim 1 , wherein the electroconductive substance is an electroconductive carbon black or titanium oxide particles which are coated with an electroconductive material.

7 . The electroconductive composite fiber according to claim 6 , wherein the electroconductive layer contains the electroconductive carbon black in a proportion of from 20 to 40 wt % and a thermoplastic resin, and
a weight ratio of the electroconductive layer to the non-electroconductive layer falls within a range of from 0.5:99.5 to 10:90.

8 . The electroconductive composite fiber according to claim 6 , wherein the electroconductive layer contains the titanium oxide particles which are coated with the electroconductive material in a proportion of from 30 to 85 wt % and a thermoplastic resin, and
a weight ratio of the electroconductive layer to the non-electroconductive layer falls within a range of from 3:97 to 50:50.

9 . The electroconductive composite fiber according to claim 6 , wherein the electroconductive layer contains the electroconductive substance and a thermoplastic resin, and
the thermoplastic resin is a thermoplastic polyamide or a thermoplastic polyolefin.

10 . A fiber structure comprising electroconductive composite fibers as recited in claim 1 in at least a part of the fiber structure.

Assignees

• Kuraray Co

Inventors

• Onogi Shoji
• Yamasaki Kohei
• Nakatsuka Hitoshi

Classifications

• C08G63/6926

  Dicarboxylic acids and dihydroxy compounds · CPC title

• C08G63/199

  Acids or hydroxy compounds containing cycloaliphatic rings · CPC title

• C08G63/183

  Terephthalic acids · CPC title

• D01F1/09

  for making electroconductive or anti-static filaments · CPC title

• D01F8/06

  with at least one polyolefin as constituent · CPC title