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FLAME-RETARDANT, HIGH TEMPERATURE-RESISTANT POLYIMIDE FIBRES, PREPARATION AND MOULDED BODIES THEREOF
FLAME-RETARDANT, HIGH TEMPERATURE-RESISTANT POLYIMIDE FIBRES, PREPARATION AND MOULDED BODIES THEREOF
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机译:阻燃,耐高温聚酰亚胺纤维,制备方法及其模制体
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摘要
The present disclosure describes flame-retardant, high-temperature resistant polyimide fibers, nonwovens made from said fibers, as well as the fibers and molded articles obtained after a heat treatment. A composite of such fibers is heated to a temperature in the glass transition range of the fiber, i.e. between 280 DEG and 350 DEG C. This heat treatment develops a contraction force of 0.3 to 1.1 cN in the fibers which results in a fiber shrinkage of between 20 and 60% and the formation of cohesive bonds. The fibers of the invention enable the manufacture of molded articles that are particularly strong, have a high temperature resistance and flame-retardant properties, while having a relatively low density.
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