| 摘要 |
PURPOSE:To unify manufacturing process and manufacture an urethane foam molding having a surface skin with a comparatively inexpensive equipment by a method wherein the powder of thermoplastic resin is coated on the inner surface of a mold for molding, thereafter, the powder is heated to melt and form the coated film of the resin, subsequently, foaming is performed by pouring the stock solution of urethane. CONSTITUTION:An uniform resin film is formed in the mold for molding urethane by employing the powder of thermoplastic resin. Thermoplastic resin powder is preferably to be the resin powder having the softening point of 200 deg.C or less as the material of a sheet for surface skin. The formation of a thermoplastic resin coated film is achieved by heating the mold to a temperature in which the powder of resin is melted and fluidized after adhered to the inside of the mold, however, the outer surface of the mold or the surface, on which the formation of the coated film is not necessitated, is masked by nylon or the like to prevent the adhesion of the resin powder. Subsequently, the stock solution of urethane is poured into the mold, formed with said resin coated film, to foam and mold it. The stock solution, mixed with toluene diisocyanate, various kinds of polymers and catalyst properly, may be used as the stock solution of urethane. |
