Interlayer film for laminated glass and laminated glass

Details Interlayer film for laminated glass and laminated glass Interlayer film for laminated glass and laminated glass

C - Chemistry, Metallurgy

03

C

C03C 27/12 (2006.01) B32B 17/10 (2006.01) B60J 1/00 (2006.01)

Patent

CA 2646038

An intermediate film for laminated glass and laminated glass having excellent sound insulation properties and particularly suitably used for a head-up display etc. where the driver can view both a forward field and instrument display at the same time without dropping their line of vision. The intermediate film for laminated glass is constructed from at least a pair of protective layers and a sound insulation layer sandwiched between the pair of protective layers. The intermediate film has a wedge shape cross-section, a cross-section wedge angle .theta. of 0.1 - 0.7 mrad, a maximum thickness of not more than 2000 µm, and a minimum thickness of not less than 400 µm. The minimum thickness of the sound insulation layer is not less than 20 µm.

La présente invention concerne un film intermédiaire destiné à du verre stratifié et un verre stratifié présentant d'excellentes propriétés d'insonorisation qui convient particulièrement à une utilisation destinée à un affichage à tête haute, etc., ce qui permet au conducteur de voir simultanément un champ avant et un affichage d'instrument sans perdre leur axe visuel. Le film intermédiaire destiné au verre stratifié est obtenu à partir au moins d'une paire de couches protectrices et d'une couche d'insonorisation intercalée entre la paire de couches protectrices. Le film intermédiaire comprend une section transversale cunéiforme dont l'angle ? est compris entre 0,1 et 0,7 mrad, l'épaisseur maximale ne dépasse pas 2000 µm et l'épaisseur minimale ne descend pas en dessous de 400 µm. L'épaisseur minimale de la couche d'insonorisation ne descend pas en dessous de 20 µm.

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