INTERMEDIATE FILM FOR LAMINATED GLASS, AND LAMINATED GLASS

摘要

The present invention aims to provide an interlayer film for a laminated glass providing excellent overall sound insulation at temperatures in the wide range of from 10 to 60°C. The present invention is an interlayer film for a laminated glass, including: a sound insulation layer 1; a middle layer; and a sound insulation layer 2, the layers each containing a polyvinyl acetal resin and a plasticizer and being laminated in the stated order, wherein the amount of the plasticizer per 100 parts by weight of the polyvinyl acetal resin in the sound insulation layer 1 is different by from 5 to 60 parts by weight from the amount of the plasticizer per 100 parts by weight of the polyvinyl acetal resin in the sound insulation layer 2, and the amounts of acetyl groups in the polyvinyl acetal resin contained in the sound insulation layer 1 and the sound insulation layer 2 each are larger than the amount of acetyl groups in the polyvinyl acetal resin contained in the middle layer.