Interlayer film for laminated glass and laminated glass

Abstract

It is an object of the present invention to provide an interlayer film for a laminated glass excellent in a sound-insulating property, which is preferably usable for a head up display and the like wherein a driver can look at the front view and an instrument display simultaneously without requiring to look down, and to provide a laminated glass. The present invention is directed to interlayer film for a laminated glass, which comprises at least a pair of protection layers and a sound-insulating layer sandwiched between the pair of the protection layers, and which has a wedge shape as a cross-sectional shape, a wedge angle e of 0.1 to 0.7 mrad, the maximum thickness of 2000 μm or thinner, and the minimum thickness of 400 μm or thicker, the minimum thickness of the sound-insulating layer being 20 μm or thicker.

1 . An interlayer film for a laminated glass,
 which comprises at least a pair of protection layers and a sound-insulating layer sandwiched between the pair of the protection layers,   and which has a wedge shape as a cross-sectional shape, a wedge angle θ of 0.1 to 0.7 mrad, the maximum thickness of 2000 pm or thinner, and the minimum thickness of 400 μm or thicker, the minimum thickness of the sound-insulating layer being 20 μm or thicker.   
     
     
         2 . The interlayer film for a laminated glass according to  claim 1 ,
 which further comprises a shape assisting layer laminated on at least one layer of the pair of the protection layers.   
     
     
         3 . The interlayer film for a laminated glass according to  claim 1 , wherein the protection layer, and/or the sound-insulating layer contain a heat-insulating agent 
     
     
         4 . The interlayer film for a laminated glass according to  claim 2 ,
 wherein the shape assisting layer contains a heat-insulating agent.   
     
     
         5 . A laminated glass,
 which is obtained by using the interlayer film for a laminated glass according to  claim 1 .   
     
     
         6 . A laminated glass,
 which is obtained by using the interlayer film for a laminated glass according to  claim 2 .   
     
     
         7 . A laminated glass,
 which is obtained by using the interlayer film for a laminated glass according to  claim 3 .   
     
     
         8 . A laminated glass,
 which is obtained by using the interlayer film for a laminated glass according to  claim 4 .