| 摘要 |
PROBLEM TO BE SOLVED: To provide: a backside protective sheet for solar battery modules which is sufficient in the resistance against scratch and abrasion, adhesion strength, the initial characteristic of an ultraviolet light shielding performance, and the long-term durability thereof; and a solar battery module arranged by use of such a backside protective sheet for solar battery modules.SOLUTION: A backside protective sheet for solar battery modules comprises: a polyester film as a base material; and a resin layer formed on at least one surface of the polyester film. The resin layer includes: acrylic polyol copolymer (A); polycarbonate urethane/acrylic copolymer (B); polyisocyanate (C); titanium oxide (D); and wax (E). The acrylic polyol copolymer (A) has a glass transition temperature of 20-60°C, a weight-average molecular weight of 10,000-60,000, and a hydroxyl value of 5-80(mg KOH/g). In the polycarbonate urethane/acrylic copolymer(B), the proportion of weights of the polycarbonate urethane component to the acrylic component is 20:80 to 70:30; the weight-average molecular weight is 40,000-100,000; the hydroxyl value is 10-120(mg KOH/g); and the acrylic component has a glass transition temperature of 20-80°C. |
