Patent ID: 8628856

Claim:
An interlayer film for a laminated glass, comprising a first layer that contains a polyvinyl acetal resin and a plasticizer, and a second layer that contains a polyvinyl acetal resin and a plasticizer and is laminated on one face of the first layer, wherein an amount of the plasticizer for each 100 parts by weight of the polyvinyl acetal resin in the first layer is 50 parts by weight or higher, the hydroxyl content of the polyvinyl acetal resin in the first layer is lower than the hydroxyl content of the polyvinyl acetal resin in the second layer, the difference between the hydroxyl content of the polyvinyl acetal resin in the first layer and the hydroxyl content of the polyvinyl acetal resin in the second layer is at most 9.2 mol %, and the polyvinyl acetal resin in the first layer has a degree of acetylation of at most 8 mol % when the difference between the hydroxyl content of the polyvinyl acetal resin in the first layer and the hydroxyl content of the polyvinyl acetal resin in the second layer is more than 8.5 mol % and at most 9.2 mol %.