Method of densifying open-celled polyurethane material

Details Method of densifying open-celled polyurethane material Method of densifying open-celled polyurethane material

1979-05-31

1980-10-14

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264280, 264DIG66, B29D 2700

Patent

active

042280761

ABSTRACT:
A method of densifying open-celled polyurethane foam is provided in which heated air at a temperature between about 425.degree. F. and 460.degree. F. is circulated through a mass of the foam so as to rapidly and uniformly raise the temperature of the mass to between about 365.degree. F. and 435.degree. F., the mass is then compressed to a desired thickness while its temperature is maintained between 365.degree. F. and 435.degree. F., and the mass is then immediately permitted to cool.

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patent: 4073979 (1978-02-01), Pettingell

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