Film of aromatic polyamide and process therefor

Details Film of aromatic polyamide and process therefor Film of aromatic polyamide and process therefor

1981-07-17

1982-08-24

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528183, 528229, 528337, C08G 6932, C08G 6946

Patent

active

043462154

ABSTRACT:
Film of a wholly aromatic polyamide, at least 85% of the repeating units of which are meta-phenylene isophthalamide units, which is undrawn and noncrystalline and which has improved impact strength. Such film is made by heat-treating film of the polyamide which is undrawn and noncrystalline at 400.degree. to 300.degree. C. for from 2 seconds to 2 minutes while maintaining the film at constant length and width or while permitting it to shrink by at most 20% in each of the length and width.

REFERENCES:
patent: 2244192 (1941-06-01), Flory
patent: 2999788 (1961-09-01), Morgan
patent: 3063966 (1962-11-01), Kwolek
patent: 3068188 (1962-12-01), Beste et al.
patent: 3133138 (1964-05-01), Alexander, Jr.
patent: 3287324 (1966-11-01), Sweeny
patent: 3300450 (1967-01-01), Clay
patent: 3414645 (1968-12-01), Morgan, Jr.
patent: 3560137 (1971-02-01), Hahn
patent: 3696076 (1972-10-01), Vogelfanger
patent: 3822202 (1974-07-01), Hoehn
patent: 4070433 (1978-01-01), Miyoshi et al.
patent: 4073837 (1978-02-01), Kouzai et al.
English Language Translation-Japanese Published Application, 51-122167, Oct. 26, 1976; 53-11995, Feb. 2, 1978.

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