INTERLAYER FILM FOR LAMINATED GLASS AND LAMINATED GLASS

摘要

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 θ 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.

主权项

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 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 wherein the sound-insulating layer comprises a polyvinyl acetal resin and a plasticizer, and the content of the plasticizer in the sound-insulating layer is 50 parts by weight or more to 100 parts by weight of the polyvinyl acetal resin, wherein the sound-insulating layer has a wedge shape as its cross-sectional shape, and wherein the protection layers has a wedge shape as its cross-sectional shape.