Method of extruding a foamed thermoplastic core and extruding an

Details Method of extruding a foamed thermoplastic core and extruding an Method of extruding a foamed thermoplastic core and extruding an

1983-09-12

1986-07-15

Anderson, Philip

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 78, 15624427, 264 461, 264293, 264321, B29C 4730, B29C 6302, B29C 6500

Patent

active

046004610

ABSTRACT:
The present invention concerns an apparatus and process for producing an improved extruded plastic material product which consists of an inner foamed thermoplastic cellular core and an outer non-porous thermoplastic skin extending along at least one side of the core. In the process, a foamable thermoplastic material is extruded through a first die outlet to produce a foamed thermoplastic material. After exiting the die outlet, a film of non-porous thermoplastic material is applied along at least one side of extruded foamed material. Next, the extruded foamed material and the non-porous film is fed through a forming die which shapes and seals the materials into the desired cross-sectional shape.

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