BACK-PROTECTIVE SHEET FOR SOLAR CELL MODULE AND SOLAR CELL MODULE USING SAME

摘要

A back-protective sheet for a solar cell module, characterized in that: the sheet comprises a polyolefin-based resin three-layered film composed of layers (A), (B) and (C), a plastic film and an ultraviolet absorbing layer which are laminated in this order; said layer (A) comprises a resin composition obtained by mixing a polyethylene-based resin with a polypropylene-based resin; the layer (B) comprises a polypropylene-based resin composition that contains white fine particles; and the layer (C) comprises a polypropylene-based resin composition. The back-protective sheet has excellent heat resistance and hiding power, so that when thermocompression-bonded in a lamination step, the film is not so thinned by an influence of an edge of a photovoltaic device or a wiring member as to make the photovoltaic device or the wiring member visible through the sheet. Further, the back-protective sheet exhibits excellent voltage endurance characteristics by virtue of little deformation in processing, and is little deteriorated by an influence of ultraviolet light.