Tension-free heat-treatment of aramid fiber and fibrids

Details Tension-free heat-treatment of aramid fiber and fibrids Tension-free heat-treatment of aramid fiber and fibrids

1991-04-26

1992-12-22

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Treating shaped or solid article

By a temperature change

264184, 26421117, 264234, D01F 660

Patent

active

051732408

ABSTRACT:
Amorphous fibers or fibrids of poly [4,4'-(2,2'-dicarboxy) biphenyleneterephthalamide] are strengthened and heat stabilized by a relaxed heat-treatment. The fiber or fibrids are heated at temperatures in the range of 310.degree. C. to 365.degree. C. and preferably at temperatures above 325.degree. C. but below decomposition temperatures. The heating is conducted for at least 2 minutes, preferably from 5 to 15 minutes. Increases in tenacity of at least 25%, preferably at least 50% or more are attained. The fiber or fibrids are treated while free of ternsion as they would be in a loose batt, woven or knitted fibric or paper.

REFERENCES:
patent: 3386965 (1968-06-01), Huffman et al.
patent: 4957807 (1990-09-01), McCullough, Jr. et al.
Hinderer et al., "Aromatic Copolyamides Containing Pendent Carboxyl Groups", Applied Polymes Symposium No. 21 1-9 (1973).

Affiliated with

Also associated with

Rating

Tension-free heat-treatment of aramid fiber and fibrids does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tension-free heat-treatment of aramid fiber and fibrids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tension-free heat-treatment of aramid fiber and fibrids will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-973645