Method of co-extrusion with foam core

B - Operations – Transporting – 29 – D

Patent

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18/648

B29D 27/00 (1980.01)

Patent

CA 1100726

METHOD OF EXTRUDSION WITH FOAM CORE ABSTRACT OF THE DISCLOSURE Disclosed is a method of manufacturing a co- extruded article comprising the steps of mixing ingredients for a cellular plastic including a chemical blowing agent and a thermoplastic resin in a plastic state for forming a core and at a temperature range of 300°F. to 400°F. Other ingredients for at least one solid thermoplastic resin are mixed in a plastic state at a temperature differing from the temperature by at least 25°F for forming a skin for the core, and then simultaneously co-extruding the cellular plastic and solid plastic through a die.

305094

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