BACK SHEET FOR SOLAR BATTERY MODULE AND SOLAR BATTERY MODULE

• Main Authors: AMIOKA TAKAO, SHIBATA MASARU
• Format: Patent
• Language: English; Japanese
• Published: 04.04.2016
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PERFORMING OPERATIONS; SEMICONDUCTOR DEVICES; TRANSPORTING

PROBLEM TO BE SOLVED: To provide: a back sheet for a solar battery module, which is arranged to have both of a high diffusion and a high reflection and thus increased in power generation efficiency, and which is superior in productivity and low cost effectiveness; and a solar battery module.SOLUTION: A back sheet for a solar battery module according to the present invention comprises: two layers consisting of a diffusion layer and a reflective layer. The diffusion layer includes inorganic particles, and has a thickness of 12 μm or more. The reflective layer includes cavities. The reflective layer is formed from a polyester resin composition which includes 10-50 pts.mass of an incompatible polymer to 100 pts.mass of a polyester resin. The diffusion layer includes 15-80 mass% of the inorganic particles to 100 mass% of all of components of the diffusion layer.SELECTED DRAWING: Figure 2 【課題】本発明は、高拡散と高反射を併せ持つことにより、発電効率が向上し、しかも生産性及び低コスト性に優れた太陽電池モジュール用バックシートと太陽電池モジュールを提供する。【解決手段】本発明の太陽電池モジュール用バックシートは、拡散層と反射層の２層を有する太陽電池モジュール用バックシートであって、前記の拡散層は無機粒子を含み、かつ厚みが１２μｍ以上であり、前記の反射層は空洞を含む太陽電池モジュール用バックシートであって、反射層が、ポリエステル樹脂１００質量部に対し、非相溶ポリマーを１０質量部〜５０質量部含むポリエステル樹脂組成物からなり、拡散層が、その拡散層の全成分１００質量％中に無機粒子を１５質量％〜８０質量％含む。【選択図】 図２