Patent ID: 8753747
Filing Date: 2014-06-17
Classification: B32B,Y10T

Abstract:
1. An interlayer film for a laminated glass, comprising a first layer containing a polyvinyl acetal resin and a plasticizer, and a second layer containing a polyvinyl acetal resin and a plasticizer, the second layer being laminated on one face of the first layer, wherein, in the case of measuring viscoelasticity of as resin film formed from the first layer, the resin film, having a glass transition temperature of has an elastic modulus of G′(Tg+170) at (Tg+170)° C. and an elastic modulus of G′(Tg+30) at (Tg+30)° C., and provides a ratio (G′(Tg+170)/G′(Tg+30)) of 0.18 or higher, an amount of the plasticizer for each 100 parts by weight of the polyvinyl acetal resin in the first layer is larger than an amount the plasticizer for each 100 parts by weight of the polyvinyl acetal resin in the second layer, and the hydroxyl content of the polyvinyl acetal resin in the first is lower than the hydroxyl content of the polyvinyl acetal resin in the second layer.