Method for controlling thickness of skin layer of composite resin molded product

摘要

To control the thickness of the skin layer of a composite resin molded product by a viscosity difference obtained by varying the viscosity by adding another ultra-minute substance to a raw resin material. The composite resin molded product comprising the skin layer formed of a first thermoplastic resin and the core layer formed of a second thermoplastic resin is molded by injection. The viscosity difference between the resins is controlled by adding a carbon nanomaterial to one or the other of the thermoplastic resins. The thickness of the skin layer is controlled by the viscosity difference. The first thermoplastic resin and the second thermoplastic resin are of the same kind or different kinds of resins.