Sekisui Chemical Co., Ltd.

Shogo Yoshida

Tatsuya Iwamoto

Kohei Kani

Ryousuke Komatsu

The present invention provides an interlayer film for a laminated glass capable of suppressing bubble formation and bubble growth even if the laminated glass is exposed to relatively high temperatures for a long time. An interlayer film for a laminated glass according to the present invention includes a first layer and a second layer laminated on one face of the first layer, each of the first layer and the second layer contains a polyvinyl acetal resin and a plasticizer, and in the case of measuring the viscoelasticity of the first layer as a resin film (glass transition temperature: Tg(&#xb0; C.)), or the viscoelasticity of a resin film (glass transition temperature: Tg(&#xb0; C.)) containing 100 parts by weight the polyvinyl acetal resin in the first layer and 60 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO) as a plasticizer, the resin film has an elastic modulus of G'(Tg+170) at (Tg+170)&#xb0; C. and an elastic modulus of G&#x2032;(Tg+30) at (Tg+30)&#xb0; C., and provides a ratio (G&#x2032;(Tg+170)/G&#x2032;(Tg+30)) of 0.18 or higher.

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Kouka, Japan

Shogo Yoshida