LIQUID CRYSTAL POLYESTER FIBERS AND METHOD FOR PRODUCING SAME
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United States of America Patent
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Issued Date -
Oct 19, 2023
app pub date -
May 23, 2023
filing date -
Nov 25, 2020
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Abstract
Provided is a liquid crystal polyester fiber achievable of good mechanical properties by a heat treatment at a lower temperature for a shorter time and excellent in heat aging resistance. The liquid crystal polyester fiber includes at least one metallic element selected from the group consisting of metallic elements belonging to from Group 8 to Group 11 in Periodic Table. For example, the liquid crystal polyester fiber may contain the selected one or more metallic elements in a total content of from 1 to 1000 ppm by weight. The liquid crystal polyester fiber may contain the selected one or more metallic elements as one or more metallic compounds each having a melting point of (Mp0 + 30)°C or lower, wherein the Mp0 denotes a melting point of a liquid crystal polyester constituting the fiber.
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