| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyester fiber for a seat belt which has a high strength, and a small change in entanglement before and after woven in a high density in a needle loom, is excellent in strength retention and process passage rate of raw yarn, and has good entanglement characteristics. SOLUTION: The polyester fiber having a fineness of 1,000 to 2,000 dtex and a single fiber fineness of 2-20 dtex satisfies a relationship:ΔL=¾L1n-L2n¾≤15 (cm),Δσ=¾σ1-σ2¾≤15, wherein L1 (cm) the tear length of the polyester fiber; L2 (cm) is the tear length of the polyester fiber after subjected to tension at a tension of 2 cN/dtex. COPYRIGHT: (C)2008,JPO&INPIT
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