Patent ID: 7318905

Claim:
An in-mold decorating injection molding method for injection molding a decorative molding comprising the steps of: preparing a decorative sheet for in-mold decorating injection molding including a base sheet and a resin layer formed on a surface of the base sheet to be brought into contact with an injection-molded resin molding and containing an acrylic-modified polyolefin resin; inserting the decorative sheet in a space between a pair of molds in an open state; clamping the pair of molds; injecting an injection-molding resin into a cavity formed by the pair of molds so that the injection-molding resin comes into contact with the resin layer containing an acrylic-modified polyolefin resin; solidifying the injection-molding resin injected into the cavity in an injection-molded resin molding and adhesively bonding the decorative sheet for in-mold decorating injection molding to a surface of the injection-molded resin molding to form a decorative molding formed of the decorative sheet for in-mold decorating injection molding and the injection-molded resin molding; and parting the pair of molds and taking out the decorative molding from the pair of molds, wherein the decorative molding comprises: the decorative sheet for in-mold decorating injection molding, the decorative sheet comprising the base sheet having a first surface and a second surface, the decorative layer formed on the first surface, and the resin layer formed on the second surface; and the injection-molded resin molding to which the resin layer is bonded; wherein: the decorative layer comprises a binder resin, the binder resin comprising at least one of an acrylic resin and a polyvinyl chloride-acetate resin; the resin layer comprises an acrylic-modified polyolefin resin formed by graft-copolymerizing at least one of an acrylic monomer and an acrylic prepolymer on principal chains of a polypropylene resin.