PURPOSE: To improve the weatherability of a laminated product for use in natural lighting material and the heat resistance thereof at the time of its production by laminating successively an acryl multi-layer elastic body layer, a specific copolymer, an acryl polymer and an acryl resin layer consisting of a multi-layer elastic body on a polycarbonate resin plate.

CONSTITUTION: An acryl multi-layer elastic body layer 2 is laminated on a polycarbonate resin plate 1. An acryl resin mixture is made up consisting of 1-100% of monomer mixture comprising 98-40wt.% of methyl methacrylate, 1-30wt.% of N-cyclohexylmaleimide and 1-30wt.% of aromatic vinyl compound and 90-0% of the acryl polymer containing at least 70% of methyl methacrylate. An elastic body of multi-layer structure is obtained by polymerizing 70-90wt.% of the cross-linked acrylic ester copolymer resulting from polymerization of acrylic alkyl ester having alkyl group of 1-8 carbon atoms, styrene and multifunctional monomers and 30-10wt.% of the cross-linked monomer mixture of the same kind. The resin composition having 2-50 pts.wt. of the aforesaid elastic body of multi-layer structure mixed with 50-98 pts.wt. of the aforesaid acryl resin mixture is further layered on the laminated body as an acryl resin layer 3.