PURPOSE: To obtain laminated molding with adequate binding strength by forming a crystalline resin by injection, then setting the crystallinity of one surface only at less than a specified value and molding a thermoplastic resin on the surface by injection, when injection-molding a laminated molding of a crystalline resin and a thermoplastic resin.
CONSTITUTION: A crystalline resin in injection-molded by setting the temperature of an entire die lower than the melting point of the crystalline resin used and setting the temperature of a die corresponding to a binding surface to be laminated lower than the other surface. In addition, the crystallinity of the binding surface 3 of a molded product 1 obtained is set at less than 10% and the crystallinity of the other surface at 20 to 80%. Further, a thermoplastic resin 2 is molded by injection on the surface whose crystallinity is 1% or less. The thermoplastic resin 2 which can be used is of the same type as the crystalline resin or of any other type having affinity. In addition, a filler, a coloring agent or an antioxidant can be added to either one of the resins used or both for reinforcement.
SAITO YASUHIRO
MORIYA NORIYUKI
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