Plastic and nonmetallic article shaping or treating: processes – Recycling of reclaimed or purified process material – Of gaseous process material
Patent
1979-03-15
1981-01-20
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Recycling of reclaimed or purified process material
Of gaseous process material
264 54, 264140, 264DIG18, 264DIG69, 521 79, 521 81, 521 96, 521134, 521139, 521140, 521143, B29D 2700
Patent
active
042462118
ABSTRACT:
A process for the production of foam materials, particularly polyolefin foam materials, from crosslinked polyolefin scraps involves comminuting and compressing crosslinked polyolefin foam scraps at a temperature lying below the decomposition temperature of a crosslinked agent contained therein, plasticating the resulting comminuted product also at a temperature lying below the temperature of the crosslinked agent, forming a shaped article from the plasticated material and thereafter crosslinking and expanding the shaped article by heating above the decomposition temperature of the crosslinking agent and of a blowing agent contained within said material. The initial foam scraps are obtained during the formation of a crosslinked polyolefin foam containing material.
REFERENCES:
patent: 3098832 (1963-07-01), Pooley et al.
patent: 3655542 (1972-04-01), Tamai et al.
patent: 3812225 (1974-05-01), Hosoda et al.
patent: 3823213 (1974-07-01), Stastny et al.
patent: 4123584 (1978-10-01), Brewton
Anderson Philip
Dynamit Nobel Aktiengesellschaft
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