Method and apparatus for producing integral skin polyurethane fo

Details Method and apparatus for producing integral skin polyurethane fo Method and apparatus for producing integral skin polyurethane fo

1992-09-18

1995-09-12

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

528 48, 528 49, 528499, 264 405, 264 53, 264 54, 425812, 425817R, C08J 934

Patent

active

054496985

ABSTRACT:
Disclosed herein is a process for producing an integral skin polyurethane foam which comprises expanding a reacting mixture containing substantially no blowing agent in an evacuated mold cavity. Disclosed also herein is an apparatus for producing said an integral skin polyurethane foam which comprises a mold having a cavity and a vent hole, a vacuum chamber communicating with the cavity through the vent hole, a vacuum pump to evacuate the cavity through the vacuum chamber, and a sight glass attached to the vacuum chamber so as to make the vicinity of the vent hole visible from the outside of the vacuum chamber.

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