C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
18/1038
C08J 5/18 (2006.01) H05K 1/03 (2006.01) H05K 3/28 (2006.01)
Patent
CA 1152277
TITLE Film of Aromatic Polyamide and Process Therefor 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 to 300°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.
372829
Garlington William D.
Swerlick Isadore
E. I. Du Pont de Nemours And Company
Mccallum Brooks & Co.
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