PROBLEM TO BE SOLVED: To provide an interlayer film for a glass laminate that can enhance flexural rigidity of the glass laminate even when the thickness of the glass sheet is thin.SOLUTION: There is provided an interlayer film 11 for a glass laminate having a structure of one layer or a structure of two layers or more, and the interlayer film 11 for the laminate glass comprises, as a surface layer in the interlayer film 11, a first layer 1 that contains a polyvinyl acetal resin and a plasticizer. In the interlayer film 11 for the glass laminate, the polyvinyl acetal resin contained in the first layer 1 can be obtained by acetalization of polyvinyl alcohol with an aldehyde having carbon atoms of 3 or less. In the interlayer film 11 for the glass laminate, the percentage content of hydroxyl group in the polyvinyl acetal resin contained in the first layer 1 is 30 mol% or less, and the content of the plasticizer, per 100 pts.wt. of the polyvinyl acetal resin, is 20 pts.wt. or more.
【課題】ガラス板の厚みが薄くても合わせガラスの曲げ剛性を高めることができる合わせガラス用中間膜を提供する。【解決手段】1層の構造又は2層以上の構造を有する合わせガラス用中間膜11であって、中間膜11における表面層として、ポリビニルアセタール樹脂と可塑剤とを含有する第1の層1を備え、第1の層1に含まれる前記ポリビニルアセタール樹脂が、ポリビニルアルコールを炭素数が3以下であるアルデヒドでアセタール化することにより得られる合わせガラス用中間膜11。第1の層1に含まれる前記ポリビニルアセタール樹脂の水酸基の含有率が30モル%以下であり、前記ポリビニルアセタール樹脂100重量部に対して、前記可塑剤の含有量が20重量部以上である合わせガラス用中間膜11。【選択図】図1
INTERLAYER FILM FOR GLASS LAMINATE AND THE GLASS LAMINATE
合わせガラス用中間膜及び合わせガラス
2015-11-09
Patent
Electronic Resource
Japanese
IPC: | C03C Chemische Zusammensetzungen für Gläser, Glasuren oder Emails , CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS / B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / B60J WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES , Fenster, Windschutzscheiben und bewegbare Dächer, Türen oder Ähnliches für Fahrzeuge |
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