US 11,885,047 B2
Twisted cord of liquid-crystal polyester multifilaments, production method therefor, and product comprising said twisted cord
Ryosuke Sakae, Okazaki (JP); Hisatoshi Tanaka, Okazaki (JP); and Munekazu Matoba, Okazaki (JP)
Assigned to TORAY INDUSTRIES, INC., Tokyo (JP)
Appl. No. 16/971,161
Filed by Toray Industries, Inc., Tokyo (JP)
PCT Filed Feb. 26, 2019, PCT No. PCT/JP2019/007220
§ 371(c)(1), (2) Date Aug. 19, 2020,
PCT Pub. No. WO2019/167923, PCT Pub. Date Sep. 6, 2019.
Claims priority of application No. 2018-037381 (JP), filed on Mar. 2, 2018.
Prior Publication US 2021/0087332 A1, Mar. 25, 2021
Int. Cl. D02G 3/02 (2006.01); D03D 15/283 (2021.01); D01F 6/62 (2006.01); D02G 3/22 (2006.01); D03D 15/62 (2021.01)
CPC D02G 3/02 (2013.01) [D01F 6/62 (2013.01); D02G 3/22 (2013.01); D03D 15/283 (2021.01); D03D 15/62 (2021.01)] 11 Claims
 
1. A twisted cord of liquid-crystal polyester multifilaments, the twisted cord having a coefficient of variation in cord diameters in a longitudinal direction, X, of less than 30%, the coefficient of variation in cord diameters that is calculated from (Formula 1) described below:
Coefficient of variation in cord diameters, X (%)={standard deviation of cord diameters in a longitudinal direction, σ (mm)÷average cord diameter, D (mm)}×100   (Formula 1).