Densified and re-expanded polyurethane foam and a method for...

Details Densified and re-expanded polyurethane foam and a method for... Densified and re-expanded polyurethane foam and a method for...

C - Chemistry, Metallurgy

08

J

C08J 9/36 (2006.01) C08G 18/48 (2006.01)

Patent

CA 2045901

ABSTRACT Polyurethane foams having a specified glass transition temperature are densified for transportation or other purposes by heating the foam to a temperature above its Tg, compressing the heated foam, and then cooling the compressed foam to a temperature below its Tg. The cooled foam remains in a densified state until re-heated to a temperature above its Tg, whereupon it re-expands to assume its original dimensions. 37,711-F

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