A method for manufacturing a multilayer member that provides excellent adhesiveness without using a primer. An embodiment of the present invention provides a method for manufacturing a multilayer member including a first member containing a crystalline thermoplastic resin, an adhesion layer, and a second member in this order, the method including a surface treatment step of performing dry treatment on a surface of the first member containing a crystalline thermoplastic resin, satisfying the following condition A, an adhesive application step of forming an adhesive layer in a surface subjected to the dry treatment of the first member by applying an adhesive to the surface subjected to the dry treatment of the first member without interposing a primer composition, and an adhering step of making the second member adhere onto the adhesive layer.

A laminate including a base member, and a hydrogel layer whose forming material is a hydrogel, the hydrogel layer being provided on a surface of the base member. An adhesive region and a non-adhesive region are formed at an interface between the base member and the hydrogel layer, the adhesive region being a region where the base member and the hydrogel layer adhere to each other, the non-adhesive region being a region where the base member and the hydrogel layer do not adhere to each other.

A method for manufacturing a multilayer member that provides excellent adhesiveness without using a primer. An embodiment of the present invention provides a method for manufacturing a multilayer member including a first member containing a crystalline thermoplastic resin, an adhesion layer, and a second member in this order, the method including a surface treatment step of performing dry treatment on a surface of the first member containing a crystalline thermoplastic resin, satisfying the following condition A, an adhesive application step of forming an adhesive layer in a surface subjected to the dry treatment of the first member by applying an adhesive to the surface subjected to the dry treatment of the first member without interposing a primer composition, and an adhering step of making the second member adhere onto the adhesive layer.

A laminate including a base member, and a hydrogel layer whose forming material is a hydrogel, the hydrogel layer being provided on a surface of the base member. An adhesive region and a non-adhesive region are formed at an interface between the base member and the hydrogel layer, the adhesive region being a region where the base member and the hydrogel layer adhere to each other, the non-adhesive region being a region where the base member and the hydrogel layer do not adhere to each other.