| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an interlayer for laminated glass, and the laminated glass, capable of inhibiting a decline in a TL value by relaxing coincidence effect without impairing basic performances necessary for laminated glass such as transparency, weather resistance, impact energy absorbency, adhesiveness to glass or the like and also without impairing formability and operatability of the interlayer and capable of stably exhibiting an excellent sound insulating performance at a wide temperature region for a long term. SOLUTION: This interlayer for laminated glass is produced by alternately laminating (A) a plasticized polyvinyl acetal resin layer having the maximum loss tangent value existing at a temperature of (x) deg.C [wherein, (x) is 20-40], measured by dynamic viscoelastic measurement and (B) a plasticized polyvinyl acetal resin layer having the maximum loss tangent value existing at a temperature of (y) deg.C [wherein, (y) is 0-10], measured in the same way so as for the layer A to become the outermost layers. The loss tangents of the laminated layers A and B have their maximum values at (x+5)-(x+15) deg.C and at (y-15)-(y-5) deg.C, respectively. This laminated glass is produced using the same interlayer.</p> |
