Low density extruded foam having high compressive strength

Details Low density extruded foam having high compressive strength Low density extruded foam having high compressive strength

B - Operations, Transporting

32

B

18/661

B32B 5/20 (2006.01) C08J 9/14 (2006.01) B29C 67/22 (1990.01)

Patent

CA 1313932

8CN 8276/8302 LOW DENSITY EXTRUDED FOAM HAVING HIGH COMPRESSIVE STRENGTH ABSTRACT OF THE DISCLOSURE A low density extruded structural foam of closed cell structure having good compressive strength comprising a engineered thermoplastic resin, alone, or containing a flame retarding agent and/or nucleating agent, optionally combined with a vinyl aromatic resin, and a blowing agent is produced by feeding said resin, or composition, into a primary extruder wherein mixing, adding a blowing agent which is essentially insoluble in the resin at room temperature but soluble in the melt and fur her mixing, then optionally passing the mixture to a second, cooling extruder, passing said extruded mixture through a die, then expanding and foaming said composition into a foam article.

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