| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminate which is excellent in adhesiveness or dynamic strength when used as an interlayer for laminated glass, is excellent in sound insulation performance and hardly causes delamination even when used for a long time under environments in which the daily temperature difference is large and the lowest temperature is significantly low.SOLUTION: There is provided laminate which is formed by laminating a layer A containing 30 to 50 pts.mass of a plasticizer based on 100 pts.mass of a polyvinyl acetal (A) having an average residual hydroxyl group amount of 27 to 33 mol% and a layer B containing 40 to 70 pts.mass of a plasticizer based on 100 pts.mass of a polyvinyl acetal (B) having an average residual hydroxyl group amount of 15 to 24 mol%, where the dissolved content when dissolving 1g of the polyvinyl acetal (A) in 100g of methanol at 25°C is 70 to 100% and the dissolved content when dissolving 1g of the polyvinyl acetal (B) in 100g of methanol at 25°C is 10 to 40 mass%. |
