Method of reducing pinch deformation and contour lines in...

Details Method of reducing pinch deformation and contour lines in... Method of reducing pinch deformation and contour lines in...

B - Operations, Transporting

29

C

B29C 67/20 (2006.01) B29C 44/08 (2006.01) B29C 44/34 (2006.01)

Patent

CA 2168050

An improved process for cell opening of cellular polyurethane molded foam using timed partial pressure release (TPPR) reduces pinch deformation and contour lines by releasing the internal mold pressure in a curing cellular molded polyurethane foam product in a controlled manner which allows gas to escape from the mold, but which prohibits relative movement of the mold sealing surfaces by more than an imperceptible amount.

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