Method for improving impact strength in high nitrile polymers by

Details Method for improving impact strength in high nitrile polymers by Method for improving impact strength in high nitrile polymers by

1975-05-27

1977-02-01

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Stretching or stretch forming

264182, 264210R, 264289, 264346, B29D 724

Patent

active

040062112

ABSTRACT:
High nitrile polymer articles having improved impact strength and dimensional stability are prepared by stretching in more than one direction a solvent-free, thermoformed polymer article having less than 0.5 percent water and then heat setting the oriented article while in a restrained position at orientation temperatures for about 5 seconds to 2.5 minutes.

REFERENCES:
patent: 3275612 (1966-09-01), Bechtold
patent: 3388202 (1968-06-01), Opferkuch, Jr. et al.
patent: 3458617 (1969-07-01), Isley et al.
patent: 3821348 (1974-06-01), Planz

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