LAMINATED FILM FOR SOLAR CELL REAR SURFACE PROTECTIVE FILM

摘要

PROBLEM TO BE SOLVED: To provide a laminated film for a solar cell rear surface protective film and the solar cell rear surface protective film having an excellent weather resistance and an excellent hydrolysis resistance.

SOLUTION: The laminated film for the solar cell rear surface protective film includes: a layer (A) with 20-200μm thickness constituted by 98-70 wt.% syndiotactic polystyrene and 2-30 wt.% thermoplastic polyester; and a layer (B) with 5μm or larger thickness provided on at least one surface of the layer (A) and constituted by 10-30 wt.% rutile type titanium dioxide particles with 0.1-5.0μm average particle diameter and 90-70 wt.% thermoplastic polyester, wherein the thickness of the layer (B) is 25% or less of the total thickness of the laminated film, and a change in a yellow indexΔYI when irradiated by a high-pressure mercury lamp with 200 w/m2for 8 hours is less than 8.

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