Perforated plastic foam and process for making

Details Perforated plastic foam and process for making Perforated plastic foam and process for making

B - Operations, Transporting

29

C

B29C 67/20 (2006.01) B29C 44/56 (2006.01) C08J 9/14 (2006.01)

Patent

CA 2105870

Disclosed is a closed-cell plastic foam structure comprising a plastic foam (10) defining a multiplicity of channels (30) ex- tending from the surface of the foam into the foam. The channels are free of direction with respect to the longitudinal extension of the foam and preferably extend perpendicularly to the longitudinal extension to the foam structure. The channels are in gase- ous communication with the environment outside of the foam structure, and provide enhanced release of blowing agent. Further disclosed is a process for making a plastic foam structure comprising (a) providing the plastic foam and (b) perforating the foam at its surface to form a multiplicity of channels extending from the surface into the foam to form the foam structure.

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