Method of producing laminated structure

A method of producing a laminated structure, the method comprising:

• 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 said intermediate laminate by press molding;
• and
• a second molding step of forming a resin member on a surface of said molded intermediate laminate by injection molding using a raw material resin to obtain the laminated structure,
• wherein
• an adhesive resin composition constituting said adhesive resin layer contains at least (A) an acrylic-based polymer, (B) a crosslinking agent, and (C) a thermal polymerization initiator,
• during the preparation of said intermediate laminate in said lamination step, a first separator is peeled from a structure having said first separator, a second separator, and said adhesive resin layer laminated between said first separator and said second separator;
• an exposed surface of said adhesive resin layer is stuck to one of said first resin layer and said second resin layer;
• then said adhesive resin layer is pressed via said second separator using a pressing roller before said second separator is peeled;
• said second separator is then peeled;
• and an exposed surface of said adhesive resin layer is stuck to another of said first resin layer and said second resin layer,
• in said first molding step, a temperature of said adhesive resin layer is 100 to 250° C., and by heating for 30 seconds to 10 minutes, a part of said adhesive resin layer is thermally cured to be an adhesion layer,
• in said second molding step, a melting temperature of said raw material resin is 100 to 250° C., said (C) thermal polymerization initiator has a 1-minute half-life temperature lower than the melting temperature of said raw material resin by 20° C. or higher, a temperature of a mold for injection molding is 100 to 300° C.,
• said adhesive resin layer has an adhesion strength to said first resin layer or said second resin layer of said intermediate laminate of less than 20 N/25 mm,
• said adhesion layer has an adhesion strength to said first resin layer or said second resin layer of said laminated structure of 20 N/25 mm or more, and
• said first resin layer, said second resin layer, and said resin member include polyester as a raw material resin.