Sealing material sheet for solar-cell module and solar-cell module using the same

A sealing material sheet for a solar-cell module, the sealing material sheet being a multi-layer sheet comprising:

• a core layer composed of a polyethylene-based resin as a base resin and skin layers, which are laminated directly on both sides of the core layer and disposed on both outermost surfaces of the core layer and are composed of a polyethylene-based resin as a base resin,
• the core layer and the skin layers contain a silane-modified polyethylene-based resin, a weight average molecular weight of the silane-modified polyethylene-based resin present in the core layer and the skin layers in terms of polystyrene is 70000 or more;
• wherein the core layer has a melting point of 70° C. or higher and 110° C. or lower, and the skin layer has a melting point of 70° C. or higher and 90° C. or lower,
• wherein tensile shear adhesion strength measured by a tensile shear adhesion strength measurement experiment below is at least 1000 N,
• wherein the tensile shear adhesion strength measurement experiment measures the tensile shear adhesion strength by the test method according to JIS K7197 at a tensile rate of 1.27 mm/min, after preparing an evaluation sample using two colorless strengthened glass having a flat surface, and placing a sealing material sheet cut to 2.5 cm×1.27 cm between two glass plates, and performing a vacuum heating lamination treatment at a set temperature of 150° C. under a vacuum aspiration for 3 minutes and an atmospheric pressurization of 7 minutes.