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US 2025/0075381 A1Published application
Liquid crystal polyester multi-filament and method for manufacturing same
AssigneeKuraray Co., Ltd.
InventorsKeiichi IKEHATA, Junya IDE
Life of this patent
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Abstract
A liquid crystal polyester multifilament has an initial modulus variation of 3.0% or less and a tensile strength of 18 cN/dtex or more.
Claims6
The method of claim 4, wherein said process produces a liquid crystal polyester multifilament having an initial modulus variation of 3.0% or less and a tensile strength of 18 cN/dtex-30 cN/dtex.
(canceled)
A method for manufacturing a liquid crystal polyester multifilament having an initial modulus variation of 3.0% or less and a tensile strength of 18 cN/dtex or more, the method comprising:
- subjecting a spun raw yarn of the liquid crystal polyester multifilament to heat treatment, wherein the spun raw yarn undergoes the heat treatment under tension and while being transferred at an extension ratio of 1.001 times to 1.200 times, and wherein the tension applied during the heat treatment is 0.001 cN/dtex to 0.06 cN/dtex.
Dependencies are inferred from the claim text.