A method of producing a laminated structure includes: a laminated structure that has high adhesion strength between resin layers and that is excellent in respect of working efficiency, the method including: a lamination step of preparing an intermediate laminate in which a first resin layer and a second resin layer are laminated with an adhesive resin layer interposed between the first resin layer and the second resin layer; a first molding step of molding the intermediate laminate; and a second molding step of forming a resin member on a surface of the molded intermediate laminate by injection molding using a raw material resin to obtain a laminated structure in which at least a part of the adhesive resin layer is thermally cured to be an adhesion layer. An adhesive resin composition constituting the adhesive resin layer contains at least an acrylic-based polymer, a crosslinking agent, and a thermal polymerization initiator.

A method of producing a laminated structure includes: a laminated structure that has high adhesion strength between resin layers and that is excellent in respect of working efficiency, the method including: a lamination step of preparing an intermediate laminate in which a first resin layer and a second resin layer are laminated with an adhesive resin layer interposed between the first resin layer and the second resin layer; a first molding step of molding the intermediate laminate; and a second molding step of forming a resin member on a surface of the molded intermediate laminate by injection molding using a raw material resin to obtain a laminated structure in which at least a part of the adhesive resin layer is thermally cured to be an adhesion layer. An adhesive resin composition constituting the adhesive resin layer contains at least an acrylic-based polymer, a crosslinking agent, and a thermal polymerization initiator.

The present invention relates to a novel process for the production of novel fiber-reinforced profile materials comprising a rigid foam core, in particular a PMI foam core. In particular, the present invention relates to a novel process which can be carried out in two variants, a short Pul-press process and a Pul-shape process. One step here produces a fiber-reinforced profile material and simultaneously inserts the rigid foam core into same. The same step moreover ensures very good binding of the rigid foam core to the fiber-reinforced profile material.

A manufacturing method and structure for a composite material racket frame includes the following steps: (a) Resin impregnation: Impregnate a composite material with resin; (b) Wrapping the core mold with composite material: Use a core mold in the shape of a racket, made of polymethacrylimide (PMI) or expanded polypropylene (EPP) material; then wrap the composite material around the core mold to form a composite material layer. The mutually wrapped composite material layers and core mold together form a semi-finished product; (c) Heating and pressurizing: Place the semi-finished product into a mold with a cavity, and heat the mold to a preset temperature. After heating, the core mold expands due to heat, forming internal pressure within the semi-finished product; (d) Cooling and curing: Stop heating and allow the semi-finished product to cool until it reaches a cured state, and (e) Finished product formation: Remove a finished racket frame from the mold.