3878282 is referenced by 94 patents and cites 5 patents.

A multi-layer molded article is formed by injection molding two thermoplastic materials onto a mandrel, each in a separate injection molding step to form a multi-layer parison. The parison is then blow molded, cooled and removed from the mandrel. Prior to injection of the second thermoplastic material, the first layer parison is cooled to a temperature below its normal working range so that injection of the second layer on top of the first layer will not erode the first layer.The aforementioned Abstract is neither intended to define the invention of the application which, of course, is measured by the claims, nor is it intended to be limiting as to the scope of the invention in any way.

Process for molding multilayer articles
Application Number
Publication Number
Application Date
August 3, 1973
Publication Date
April 15, 1975
Abramo Ralph J
Bonis Lazlo J
Gerstman George H
Ilikon Corporation
B29f 01/10
B29c 25/00
B29c 17/07
B29C 49/22
B29C 45/16
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