INTERLAYER FILM FOR LAMINATED GLASS, AND LAMINATED GLASS

• Main Author: ARISHIMA, Hiroyuki
• Format: Patent
• Language: English; French; German
• Published: 05.05.2021
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; MINERAL OR SLAG WOOL; PERFORMING OPERATIONS; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FORVEHICLES; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; TRANSPORTING; VEHICLES IN GENERAL; WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILARDEVICES FOR VEHICLES

The present invention relates to an interlayer film for a laminated glass, comprising in sequence an A layer, a C layer, and an A layer, and comprising at any place between or outside these layers, a B layer, wherein each A layer is a layer containing a first thermoplastic resin, a resin material constituting each A layer has a peak at which a tan δ measured by performing a complex shear viscosity test under a condition of a frequency of 1 Hz according to JIS K 7244-10: 2005 is maximum in a range of -30°C or more and 10°C or less, the resin material of at least one layer of the A layers has a height of the peak of a tan δ of 1.5 or more, the C layer is a layer composed of an inorganic glass having a thickness of 0.1 mm or more and 1.5 mm or less, or a layer having a thickness of 0.25 mm or more and 2.5 mm or less and containing a third thermoplastic resin, and when the C layer is the layer containing a third thermoplastic resin, a resin material constituting the C layer has a tensile storage elastic modulus at 0°C measured by performing a dynamic viscoelasticity test under a condition of a frequency of 0.3 Hz according to JIS K 72444:1999 of 1.0 GPa or more, and the B layer is a layer containing a second thermoplastic resin, and is constituted of a resin material different from the resin material constituting the A layer.