INTERLAYER FILM FOR LAMINATED GLASS, AND LAMINATED GLASS

摘要

Provided is an interlayer film for laminated glass which can improve the penetration resistance of laminated glass.;When two surfaces on both sides of the interlayer film for laminated glass according to the present invention have different glass transition temperatures respectively, a lower glass transition temperature (° C.) between the glass transition temperatures of the two surfaces on both sides of the interlayer film is denoted by X. When the two surfaces on both sides of the interlayer film have the same glass transition temperature, the glass transition temperature (° C.) of the two surfaces on both sides of the interlayer film is denoted by X. Furthermore, a tensile breaking energy (J/mm2) of the interlayer film is denoted by Y. In this case, X is equal to or higher than 20° C. and equal to or less than 50° C., and Y is equal to or greater than (0.043X+0.83) J/mm2.

主权项

1. An interlayer film for laminated glass comprising:
a polyvinyl acetal resin; and a plasticizer, wherein when two surfaces on both sides of the interlayer film have different glass transition temperatures respectively, a lower glass transition temperature (° C.) between the glass transition temperatures of the two surfaces on both sides of the interlayer film is denoted by X, when the two surfaces on both sides of the interlayer film have the same glass transition temperature, the glass transition temperature (° C.) of the two surfaces on both sides of the interlayer film is denoted by X, a tensile breaking energy (J/mm2) of the interlayer film is denoted by Y, and in this case, X is equal to or higher than 20° C. and equal to or less than 50° C., and Y is equal to or greater than (0.043X+0.83) J/mm2.