Interlayer for laminated glass, and laminated glass
AssigneeSekisui Chemical Co., Ltd.
InventorsTatsuya Iwamoto, Nami Minakuchi, Yuuma Takeda
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Abstract
Provided is an interlayer film for laminated glass that can improve bending rigidity and sound insulating properties of laminated glass and can inhibit the occurrence and growth of foam in the laminated glass. An interlayer film for laminated glass according to the present invention has a single-layer structure or a two or more-layer structure and includes a first layer containing a polyvinyl acetal resin and a plasticizer, in which a glass transition temperature of the first layer is 10° C. or lower, and an elastic modulus of the first layer at 30° C. is 285,000 Pa or greater.
Claims14
An interlayer film for laminated glass that has one-layer structure or a two or more layer-structure, the interlayer film comprising:
- a first layer containing a polyvinyl acetal resin and a plasticizer,
- wherein the first layer has a glass transition temperature of 10° C. or lower, and has an elastic modulus of 285,000 Pa or greater at 30° C., and
- wherein a ratio of an elastic modulus of the first layer at a temperature of the glass transition temperature (° C.) of the first layer+80° C. to an elastic modulus of the first layer at a temperature of the glass transition temperature (° C.) of the first layer+30° C. ranges from 0.48 to 0.62.
Dependencies are inferred from the claim text.