Patent ID: 9410273
Filing Date: 2016-08-09
CPC Classification: D01F,D04H,Y10T

Claim Text:
1. A fiber bundle, wherein the fiber bundle has total denier of 10,000 to 500,000 dtex, and the fiber bundle is a bundle of thermoplastic, conjugate, continuous fibers, each of which is made of same conjugate components as the conjugate components in other fibers in the bundle of the thermoplastic, conjugate, continuous fibers, wherein the thermoplastic, conjugate, continuous fibers have single filament denier of 0.5 to 100 dtex/f, in thermoplastic, conjugate, and continuous fibers, a center of gravity of the conjugate components of the fibers in a fiber cross section varies among the conjugate components, the thermoplastic, conjugate, continuous fibers that form the fiber bundle have an apparently existent crimp of 8 to 30 crimps per 2.54 cm, the apparently existent crimp is in a shape of a serrated zigzag crimp or an Ω-shaped crimp, thermoplastic resin that forms a surface of the thermoplastic, conjugate, and continuous fiber is polyethylene-based thermoplastic resin or polypropylene-based thermoplastic resin, wherein polypropylene-based thermoplastic resin that is a binary copolymer, a tertiary copolymer, or a quaternary copolymer of propylene as a primary monomer with one or more α-olefins other than propylene is excluded, a fiber bundle density as defined by D a density ratio by spreading (which is a web density/fiber bundle density after spreading by drawing to a ratio of 1.6 in a pinch roller spreading machine at a rate of 25 m/min where a fiber bundle temperature is 25° C.) is 0.10 or less.