Flame retardant high-temperature-resistant polyimide fibers and

Details Flame retardant high-temperature-resistant polyimide fibers and Flame retardant high-temperature-resistant polyimide fibers and

1993-12-16

1996-01-23

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428296, 528125, 528126, 528128, B29D 2800, D04H 104, C08G 802, C08G 1400

Patent

active

054864127

ABSTRACT:
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.degree. and 350.degree. 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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New Materials Offer Undreamed of Opportunities For The Opportunities For The Aerospace Industry.
Roughly translated, Lightweight Fiber for Aviation and Space Industry.
K. G. Buller, Heat and Thermoresistant Polymers (roughly translated); M., Chemija, 1984, 7.1.1.9, p. 744, Nauka, 1983, p. 290.

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