| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyethylene based seal-material sheet for a solar battery module, which is subjected to a crosslinking treatment by irradiation with ionizing radioactive rays, and which has a heat resistance, adhesion and moldability.SOLUTION: A seal-material sheet for a solar battery module is a multilayer seal-material sheet 1 subjected to a crosslinking treatment by irradiation with ionizing radioactive rays, and including an intermediate layer 11 and an outermost layer 12. The multilayer sheet has a total thickness of 100-1000 μm. The intermediate layer 11 includes, as a base resin, a polyethylene-based resin having a density of 0.870-0.970 g/cm, the loss tangent average value at 80-110°C being in a range of 0.39-0.69. The outermost layer 12 includes, as a base resin, a polyethylene-based resin of a density of 0.870-0.900 g/cm, the loss tangent average value at 80-110°C being over one to 5000.SELECTED DRAWING: Figure 1 |
