HEAT-RESISTANT HIGH-TOUGHNESS FIBER, PRODUCTION METHOD THEREOF, AND HEAT-RESISTANT HIGH-TOUGHNESS FILM
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United States of America Patent
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Issued Date -
Sep 26, 2024
app pub date -
Feb 21, 2022
filing date -
Feb 24, 2021
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Abstract
Provided are: heat-resistant high-toughness fibers and film that have excellent balance of physical properties regarding strength, degree of elongation, and heat resistance. The heat-resistant high-toughness fibers according to the present invention are characterized by having a breaking strength of 3.5-15 cN/dtex, an elongation at break of 5-30%, and a melting point of at least 290° C. A production method for heat-resistant high-toughness fibers according to the present invention is characterized by using, in a yarn material, a copolymerized aramid polymer containing at least three types of monomeric units selected from the group consisting of meta-phenylenediamine, para-phenylenediamine, isophthaloyl, and terephthaloyl.
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