LIQUID CRYSTALLINE POLYESTER FIBER AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a liquid crystalline polyester fiber free from single fiber welding trouble in the case of performing solid-phase polymerization in a package form, having excellent processability in a higher-order processing and having little defects and fibrils.

SOLUTION: Provided are a liquid crystalline polyester fiber and its production method including the application of a fluorine compound having 40 or less carbon atoms and a polysiloxane to a fiber obtained by the melt-spinning of a liquid crystalline polyester and the solid-phase polymerization of the product.

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