A method for producing a multilayer member having a first member containing a crystallizable thermoplastic resin, an adhesion layer, and a second member includes performing a dry treatment on a surface of the first member containing a crystallizable thermoplastic resin so as to satisfy conditions A and B, applying an adhesive to the surface of the first member to form an adhesive layer on the surface, and adhering the second member to the adhesive layer. (A) The ultimate temperature of the first member is lower than the peak temperature of endothermic peak obtained by DSC of the crystallizable thermoplastic resin. (B) The high temperature holding time of the first member is less than 3.0 seconds, which is when the first member is continuously held at a temperature not lower than a temperature at the starting point of the endothermic peak obtained by DSC of the crystallizable thermoplastic resin.

A fiber-reinforced resin material includes: a first fiber-reinforced resin layer; a second fiber-reinforced resin layer having higher ductility and lower elasticity than those of the first fiber-reinforced resin layer; and a third fiber-reinforced resin layer having higher ductility and lower elasticity than those of the second fiber-reinforced resin layer. The first layer, the second layer, and the third layer are laminated and integrated in this order is made of the fiber-reinforced resin material. The manufacturing method includes: stacking a sheet-shaped product obtained by forming continuous fibers into a sheet shape and a resin sheet that serves as a first thermoplastic resin, a second thermoplastic resin, or a third thermoplastic resin so as to obtain a laminated structure in which the first layer, the second layer, and the third layer are laminated in this order; and heating and compressing the obtained stacked product in a stacking direction.

A fiber-reinforced resin material includes: a first fiber-reinforced resin layer; a second fiber-reinforced resin layer having higher ductility and lower elasticity than those of the first fiber-reinforced resin layer; and a third fiber-reinforced resin layer having higher ductility and lower elasticity than those of the second fiber-reinforced resin layer. The first layer, the second layer, and the third layer are laminated and integrated in this order is made of the fiber-reinforced resin material. The manufacturing method includes: stacking a sheet-shaped product obtained by forming continuous fibers into a sheet shape and a resin sheet that serves as a first thermoplastic resin, a second thermoplastic resin, or a third thermoplastic resin so as to obtain a laminated structure in which the first layer, the second layer, and the third layer are laminated in this order; and heating and compressing the obtained stacked product in a stacking direction.

A recording medium, including: an ink-receiving layer configured to receive an ink for inkjet recording; and a transparent sheet having a total luminous transmittance of 50% or more, wherein the recoding medium has a layered structure in which the transparent sheet and the ink-receiving layer are sequentially stacked, and the ink-receiving layer includes a gap-absorption-type ink-receiving layer including a composition including at least inorganic fine particles and polyvinyl alcohol having a weight-average polymerization degree of 2,000 or more and 5,000 or less and a saponification degree of 70 mol % or more and 90 mol % or less.

A recording medium, including: an ink-receiving layer configured to receive an ink for inkjet recording; and a transparent sheet having a total luminous transmittance of 50% or more, wherein the recoding medium has a layered structure in which the transparent sheet and the ink-receiving layer are sequentially stacked, and the ink-receiving layer includes a gap-absorption-type ink-receiving layer including a composition including at least inorganic fine particles and polyvinyl alcohol having a weight-average polymerization degree of 2,000 or more and 5,000 or less and a saponification degree of 70 mol % or more and 90 mol % or less.

A coating of structures or elements or parts made of plastic material obtained by molding includes a finish layer; a reinforcement layer coupled to the finish layer, from the opposite side to the exposed face, to form a sandwich; and a heat-sealable film coupled in its solid form to the reinforcing layer, wherein this sandwich is suited to be coupled to a support part in a plastic material obtained by molding, and wherein this coupling occurs during the molding of the support part by way of the heat-sealable film suited to be activated at the molding temperature.

A coating of structures or elements or parts made of plastic material obtained by molding includes a finish layer; a reinforcement layer coupled to the finish layer, from the opposite side to the exposed face, to form a sandwich; and a heat-sealable film coupled in its solid form to the reinforcing layer, wherein this sandwich is suited to be coupled to a support part in a plastic material obtained by molding, and wherein this coupling occurs during the molding of the support part by way of the heat-sealable film suited to be activated at the molding temperature.

To provide a manufacturing method of a laminate body, including: a step of forming onto a supporting body a curable resin composition layer formed from a thermosetting resin composition to obtain a curable resin composition layer with a supporting body; a step of laminating the curable resin composition onto a substrate on a curable resin composition layer forming surface side to obtain a pre-cured composite with a supporting body formed from a substrate and a curable resin composition layer with a supporting body; a step of performing a first heating of the pre-cured composite and thermally curing the curable resin composition layer to obtain a cured composite with a supporting body formed from a substrate and a cured resin layer with a supporting body; a step of performing hole punching from the supporting body side of the cured composite with a supporting body to form a via hole in the cured resin layer; step of removing resin residue in the via hole of the cured composite with a supporting body; a step of peeling the supporting body from the cured composite with a supporting body to obtain a cured composite formed from a substrate and a cured resin layer, and a step of forming a dry plated conductor layer by dry plating on an inner wall surface of the via hole of the cured composite and on the cured resin layer.

To provide a manufacturing method of a laminate body, including: a step of forming onto a supporting body a curable resin composition layer formed from a thermosetting resin composition to obtain a curable resin composition layer with a supporting body; a step of laminating the curable resin composition onto a substrate on a curable resin composition layer forming surface side to obtain a pre-cured composite with a supporting body formed from a substrate and a curable resin composition layer with a supporting body; a step of performing a first heating of the pre-cured composite and thermally curing the curable resin composition layer to obtain a cured composite with a supporting body formed from a substrate and a cured resin layer with a supporting body; a step of performing hole punching from the supporting body side of the cured composite with a supporting body to form a via hole in the cured resin layer; step of removing resin residue in the via hole of the cured composite with a supporting body; a step of peeling the supporting body from the cured composite with a supporting body to obtain a cured composite formed from a substrate and a cured resin layer, and a step of forming a dry plated conductor layer by dry plating on an inner wall surface of the via hole of the cured composite and on the cured resin layer.

A method for producing a sandwich panel with a reinforced foam core includes inserting rod-shaped, thermoplastic reinforcing elements into a thermoplastic foam material such that the reinforcing elements extend through the foam material. End regions of the reinforcing elements project out of the foam material. The foam material is thermoformed to form a reinforced foam core, wherein the end regions of the reinforcing elements are integrally formed by applying temperature and pressure to the cover surfaces of the foam material and are bonded to the foam material in a fused connection. A thermoplastic cover layer is laminated on either side by applying temperature and pressure to the reinforced foam core on the cover surfaces of the foam material in order to form the sandwich panel, wherein the cover layers are bonded to the reinforced foam core in a fused connection.