Process for fabricating bodies of polymeric material with foamed

Details Process for fabricating bodies of polymeric material with foamed Process for fabricating bodies of polymeric material with foamed

1994-07-06

1998-09-22

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 466, 264 468, 264 53, B29C 4406, B29C 4412

Patent

active

058110399

ABSTRACT:
A process is presented for fabricating composite bodies of thermoplastic material including a foamed core bonded to a compatible thermoplastic sheet. A sheet of thermoplastic material is first preheated and then thermoformed on a first half-mould. The first half-mould with the thermoformed sheet is positioned opposite a second half-mould to form a hollow chamber therebetween. A foamable thermoplastic material containing one or more liquid hydrocarbons is injected into the hollow space at a temperature sufficiently high to permit the foamable material to expand and bond to the thermoformed sheet.

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