| 摘要 |
PROBLEM TO BE SOLVED: To provide an intermediate film for laminated glass which can suppress generation of bubbles and growth of bubbles of the laminated glass.SOLUTION: There is provided an intermediate film 1 for laminated glass which has first and second layers 2 and 3 containing a polyvinyl acetal resin and a plasticizer, where a content of a hydroxyl group of the polyvinyl acetal resin in the first layer 2 is lower than a content of a hydroxyl group of the polyvinyl acetal resin in the second layer 3 by 5.9 mol% or more, and when viscoelasticity of a resin film (glass transition temperature Tg (°C)) using the first layer 2 or a resin film (glass transition temperature Tg (°C)) containing 100 pts.wt of the polyvinyl acetal resin in the first layer 2 and 60 pts.wt of triethylene glycol di-2-ethylhexanoate (3GO) as the plasticizer is measured, a ratio of a coefficient of elasticity G' (Tg+80) at (Tg+80)°C to a coefficient of elasticity G' (Tg+30) at (Tg+30)°C is 0.65 or more.SELECTED DRAWING: Figure 1 |
