Laminated Sheet And Method For Producing Same

Abstract: With respect to a sheet in which an olefin resin is laminated on one surface layer of a PET film by melt extrusion lamination a conventional melt extrusion lamination method has drawbacks that because the PET film and the olefin resin are different in terms of a heat shrinkable property and a crystalline property they are extremely curled when laminated handling becomes very difficult and the secondary workability is poor. In view of the conventional drawbacks the present invention provides a backsheet for a solar cell which has favorable long term durability curling property inter layer adhesion property partial discharge voltage and workability. Provided is a laminated sheet formed by laminating at least a layer (P1 layer) mainly composed of a polyester resin an adhesive resin layer (P2 layer) and a layer (P3 layer) mainly composed of a polyolefin resin in this order with the total thickness of the laminated sheet being 30 to 50 µm the thickness of the P2 layer being 0.1 to 3 µm and the ratio of the thicknesses of the P1 layer and P3 layer (P1/P3) being 0.2 to 5.

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