Extruded closed cell thermoplastic foam

Details Extruded closed cell thermoplastic foam Extruded closed cell thermoplastic foam

1985-04-09

1987-04-07

Foelak, Morton

Stock material or miscellaneous articles

Pile or nap type surface or component

Particular backing structure or composition

264 54, 264DIG18, 428 85, 521 81, 521134, 521137, 521139, 521143, 521 79, B32B 302

Patent

active

046560742

ABSTRACT:
Useful resilient extruded closed cell foam compositions are produced by the present invention by forming an extrudable blend comprising a heat activatible chemical blowing agent and a polymer component consisting essentially of chlorinated polyethylene and at least one other thermoplastic polymer. The amount of chlorinated polyethylene is from 0.025 to 0.5 parts per part of the thermoplastic polymer. The blend is extruded at a temperature below the activation temperature of the blowing agent to form an unfoamed thermoplastic sheet, and the sheet is thereafter heated to a temperature sufficient to activate the blowing agent and expand the sheet and produce a non-crosslinked closed cell thermoplastic foam.

REFERENCES:
patent: 3651183 (1972-03-01), Hosoda et al.
patent: 3812225 (1974-05-01), Hosoda et al.
patent: 3819543 (1974-06-01), Stastny et al.
patent: 4146598 (1979-03-01), Coyne
patent: 4209473 (1980-06-01), Coyne
patent: 4220730 (1980-09-01), Coyne
patent: 4384049 (1983-05-01), Rametsteiner

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