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AssigneeToyoda Gosei Co., Ltd.
InventorsMichihiko Nakamura, Masanao Ishikake, Yukio Kawakita, Akira Mabuchi, Osamu Yamanaka
Estimating the term…
A process and a polyurethane material 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 reduce the pressure thereof below atmospheric pressure; injecting into the evacuated mold cavity a polyurethane material; and foaming the material to fill the cavity. The polyurethane material contains a polyol component and an isocyanate component with, at most, 5 parts by weight of a solvent for 100 parts by weight of the polyol component, in the absence of freon.
A process for molding a semi-rigid foam, having an integral skin comprising the steps of:
A polyurethane material consisting essentially of a polyol component and an isocyanate component and containing 0.5 to 5 parts by weight of a solvent for restricting initial increase in viscosity of the polyurethane material for 100 parts by weight of said polyol component, said material being substantially free of freon.
Dependencies are inferred from the claim text.