Process for molding an integral skin foam using an evacuated mol

Details Process for molding an integral skin foam using an evacuated mol Process for molding an integral skin foam using an evacuated mol

1994-04-13

1995-12-19

Kuhns, Allan R.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 50, 264101, B29C 4406

Patent

active

054766192

ABSTRACT:
A process for molding a semi-rigid integral skin foam which comprising an integral skin having a low degree of foaming and a core having a high degree of foaming. The process includes evacuating a mold cavity to a pressure of from above 50 to 700 Torr; injecting, into the evacuated mold cavity, a polyurethane material which contains a polyol component and an isocyanate component with air bubbles introduced therein by air loading, in the substantial absence of a foaming agent; and foaming the material to fill the cavity.

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