Laminated glass

Abstract

A laminated glass having a surface density of at most 12 kg/m 2 and comprising a plurality of glass sheets laminated one on another with an interliner provided between the respective adjacent glass sheets, wherein the interliner has an ability to shield infrared rays and an ability to insulate sounds having a frequency of 5,000 Hz.

What is claimed is:  
     
         1 . A laminated glass having a surface density of at most 12 kg/m 2  and comprising a plurality of glass sheets laminated one on another with an interliner provided between the respective adjacent glass sheets, wherein the interliner has an ability to shield infrared rays and an ability to insulate sounds having a frequency of 5,000 Hz.  
     
     
         2 . The laminated glass according to  claim 1 , which has a sound transmission loss at a frequency of 5,000 Hz of at least 35 dB when it has a flat sheet shape and a size of 1,480 (mm)×850 (mm) as viewed from the front.  
     
     
         3 . The laminated glass according to  claim 1 , wherein the interliner has a multi-layer structure.  
     
     
         4 . The laminated glass according to  claim 3 , wherein the interliner is one having a layer comprising an organic resin material for insulating sounds having a frequency of 5,000 Hz and infrared shielding fine particles incorporated therein, sandwiched between two layers made of polyvinyl butyral or polyethylene terephthalate.  
     
     
         5 . The laminated glass according to  claim 3 , wherein at least one layer constituting the multi-layer structure has the ability to insulate sounds having a frequency of 5,000 Hz, and other layers constituting the multi-layer structure have the ability to shield infrared rays.  
     
     
         6 . The laminated glass according to  claim 1 , wherein the interliner has infrared shielding fine particles incorporated and dispersed therein.  
     
     
         7 . The laminated glass according to  claim 6 , wherein the infrared shielding fine particles are inorganic fine particles made of a metal, oxide, nitride, sulfide or silicide of Re, Hf, Nb, Sn, Ti, Si, Zn, Zr, Fe, Al, Cr, Co, Ce, In, Ni, Ag, Cu, Pt, Mn, Ta, W, V and/or Mo, or made of such a material doped with Sb or F, or a composite made of such inorganic fine particles.  
     
     
         8 . The laminated glass according to  claim 7 , wherein the infrared shielding fine particles are a mixture having a single product or composite of the inorganic fine particles mixed to an organic resin, or a coated product having a single product or composite of the inorganic fine particles coated with an organic resin.  
     
     
         9 . The laminated glass according to  claim 6 , wherein the infrared shielding fine particles are tin oxide fine particles doped with antimony, or indium oxide fine particles doped with tin.  
     
     
         10 . The laminated glass according to  claim 6 , wherein the infrared shielding fine particles are an organic infrared absorber.  
     
     
         11 . The laminated glass according to  claim 10 , wherein the organic infrared absorber is a phthalocyanine type material.  
     
     
         12 . The laminated glass according to  claim 6 , wherein the infrared shielding fine particles have an average particle size of at most 0.2 μm.  
     
     
         13 . The laminated glass according to  claim 6 , wherein the infrared shielding fine particles have an average particle size of from 0.15 to 0.001 μm.  
     
     
         14 . The laminated glass according to  claim 6 , wherein the infrared shielding fine particles are incorporated and dispersed in the material constituting the interliner in a proportion of from 0.1 to 10 parts by mass per 100 parts by mass of the total mass of the material constituting the interliner.  
     
     
         15 . The laminated glass according to  claim 1 , wherein at least one glass sheet among the plurality of glass sheets is made of a colored transparent glass.  
     
     
         16 . The laminated glass according to  claim 15 , wherein the colored transparent glass is a green-colored soda lime silica glass.  
     
     
         17 . The laminated glass according to  claim 16 , wherein the colored transparent glass is a soda lime silica glass containing from 0.3 to 10% by mass of total iron calculated as Fe 2 O 3 .  
     
     
         18 . The laminated glass according to  claim 16 , wherein the colored transparent glass is a soda lime silica glass wherein the mass of FeO calculated as Fe 2 O 3  in the total iron calculated as Fe 2 O 3  and represented by mass percentage is from 20 to 40%.  
     
     
         19 . The laminated glass according to  claim 16 , wherein the sum of contents of total iron calculated as Fe 2 O 3  contained in the respective glass sheets constituting a laminated glass specimen of 1 cm 2  cut out from the laminated glass, is from 2 to 7 mg.  
     
     
         20 . The laminated glass according to  claim 1 , wherein the glass sheets have a thickness of from 1.0 to 2.5 mm.  
     
     
         21 . The laminated glass according to  claim 1 , wherein the glass sheets have a thickness of from 1.0 to 2.0 mm.  
     
     
         22 . The laminated glass according to  claim 1 , wherein the interliner is sandwiched between a first glass sheet having a thickness of from 1.0 to 1.6 mm and a second glass sheet having a thickness of from 1.5 to 2.0 mm.  
     
     
         23 . The laminated glass according to  claim 1 , wherein the interliner is made of at least one member selected from the group consisting of a polyvinyl butyral (PVB) modified material, an ethylene/vinyl acetate copolymer (EVA) material, a urethane resin material, a vinyl chloride resin material and a silicone resin material.  
     
     
         24 . The laminated glass according to  claim 1 , wherein the laminated glass is used as a window glass for an automobile.