Method of densifying open-celled polyurethane material

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

B - Operations, Transporting

29

C

18/653

B29C 44/56 (2006.01)

Patent

CA 1120223

METHOD OF DENSIFYING OPEN-CELLED POLYURETHANE MATERIAL ABSTRACT A method of densifying open-celled polyurethane foam is provided in which heated air at a temperature between about 425°F and 460°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°F and 435°F, the mass is then com- pressed to a desired thickness while its temperature is main- tained between 365°F and 435°F, and the mass is then immediately permitted to cool.

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