RUBBER-CONTAINING GRAFT POLYMER POWDER, SOLAR CELL SEALING MATERIAL CONTAINING SAME, AND INTERLAYER FOR LAMINATED GLASS

摘要

The purpose of the present invention is to provide a film having excellent transparency, corrosion resistance, adhesive properties, and economy. The purpose of the present invention is also to provide a rubber-containing graft polymer powder contained in the film. The present invention relates to a film comprising a resin composition containing a polyvinyl acetal and a rubber-containing graft polymer powder having a refractive index of 1.469-1.519, the film also containing 0-100 ppm of calcium ions and a combined total of 1-1100 ppm of alkali metal ions and alkaline earth metal ions.