Process for the manufacture of void-free polyolefin foam molding

Details Process for the manufacture of void-free polyolefin foam molding Process for the manufacture of void-free polyolefin foam molding

1974-06-18

1976-11-16

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Autogenously or by activation of dry coated particles

2041592, 260 25B, 264 22, 264 53, 264234, 264DIG18, 425812, 425817C, B29D 2700, B29F 502

Patent

active

039925013

ABSTRACT:
Foam moldings of olefin polymers are prepared by heating, and pressing together, foamed particles of an olefin polymer, containing crosslinked constituents, in molds, a temperature gradient of from 0.5.degree. to 25.degree. C per cm of loose mass of particles being established in the mold, which has a gas-permeable wall on the lower-temperature side.

REFERENCES:
patent: 3655542 (1972-04-01), Tamai et al.
patent: 3746610 (1973-07-01), Hoegger
patent: 3832429 (1974-08-01), Charpentier
patent: 3889032 (1975-06-01), Koelsch

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