Interlayer for laminated glass and laminated glass

摘要

The present invention provides an interlayer film for laminated glass, that exhibits an excellent sound-insulating performance for solid-borne sound in an environment at or below 0° C. Another object is to provide laminated glass that is obtained using this interlayer film for laminated glass. The present invention is an interlayer film for laminated glass, that has a sound-insulating layer for which a temperature T1, which is the temperature that gives the maximum value of tan δ at a frequency of 1 Hz, is in the range from −30° C. to 0° C.

主权项

1. An interlayer film for laminated glass,
comprising a sound-insulating layer for which a temperature T1, which is a temperature that gives a maximum value of tan δ at a frequency of 1 Hz, is in a range from −30° C. to 0° C., wherein the sound-insulating layer contains 80 parts by weight or more of plasticizer with respect to 100 parts by weight of polyvinyl acetal resin that has 3 or 4 carbons in an acetal group, and wherein the sound-insulating layer is interposed between two protective layers, and the temperature T2, which is the temperature that gives the maximum value of tan δ for the protective layer at a frequency of 1 Hz, is greater than T1.