Method of making a foamed resin sheet

Details Method of making a foamed resin sheet Method of making a foamed resin sheet

B - Operations, Transporting

29

C

18/672

B29C 44/08 (2006.01)

Patent

CA 1155625

ABSTRACT OF THE DISCLOSURE What is disclosed is a method for making a foamed resin sheet from a body of hot foamable synthetic resin containing a blowing agent, which method comprises heating said foamable body to a temperature which initiates foaming, limiting lateral expansion of the resulting foam by contact with a limiting surface while permitting free expansion of the foam thickness, then limiting further expansion of the foam thickness by contact with a limiting surface, and then cooling the foam below the foaming temperature while maintaining said limitations on foam expansion in the lateral and thickness directions by contact with said limiting surfaces.

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