Methods for producing ion exchanged glass and resulting apparatus

Abstract

A laminate structure having a first glass layer, a second glass layer, and at least one polymer interlayer intermediate the first and second glass layers. The first glass layer is comprised of a thin, chemically strengthened glass having a surface compressive stress of between about 250 MPa and about 350 MPa and a depth of layer (DOL) of compressive stress greater than about 60 μm. The second glass layer can also be comprised of a thin, chemically strengthened glass having a surface compressive stress of between about 250 MPa and about 350 MPa and a depth of layer (DOL) of compressive stress greater than about 60 μm.

We claim: 
     
         1 . A vehicle comprising: a laminate, the laminate comprising: a first glass layer; a second glass layer; and at least one polymer interlayer intermediate the first and second glass layers, wherein the first glass layer is comprised of a chemically strengthened glass having a thickness not exceeding 1.5 mm, a central tension (CT) of less than about 48 MPa, and a depth of layer (DOL) of compressive stress greater than 60 μm. 
     
     
         2 . The vehicle of  claim 1 , wherein the second glass layer is comprised of a chemically strengthened glass having a surface compressive stress of between about 250 MPa and about 350 MPa and a DOL of compressive stress greater than 60 μm. 
     
     
         3 . The vehicle of  claim 1 , wherein the surface compressive stress of the first glass layer is approximately 300 MPa. 
     
     
         4 . The vehicle of  claim 1 , wherein the second glass layer has a thickness not exceeding 1 mm. 
     
     
         5 . The vehicle of  claim 1 , wherein the thicknesses of the first and second glass layers are different. 
     
     
         6 . The vehicle of  claim 1 , wherein the composition of the first and second glass layers are different. 
     
     
         7 . The vehicle of  claim 1 , wherein a surface of the first glass layer adjacent the interlayer is acid etched. 
     
     
         8 . The vehicle of  claim 1 , wherein a surface of the second glass layer opposite the interlayer is acid etched. 
     
     
         9 . The vehicle of  claim 1 , wherein the polymer interlayer comprises a material selected from the group consisting of poly vinyl butyral (PVB), polycarbonate, acoustic PVB, ethylene vinyl acetate (EVA), thermoplastic polyurethane (TPU), ionomer, a thermoplastic material, and combinations thereof. 
     
     
         10 . The vehicle of  claim 1 , wherein the second glass layer has a thickness of 2.0 mm or more. 
     
     
         11 . The vehicle of  claim 1 , wherein the first glass layer comprises a surface compressive stress of less than about 350 MPa. 
     
     
         12 . A vehicle comprising: a laminate structure, wherein the laminate structure comprises a first glass layer; a second glass layer; and at least one polymer interlayer intermediate the first and second glass layers,
 wherein the first glass layer is comprised of a chemically strengthened glass having a central tension (CT) of less than about 48 MPa, and a depth of layer (DOL) of compressive stress greater than about 60 μm, and   wherein the second glass layer has a thickness different from the first glass layer.   
     
     
         13 . The vehicle of  claim 12  wherein the first glass layer comprises a surface compressive stress of between about 250 MPa and about 350 MPa. 
     
     
         14 . The vehicle of  claim 12  wherein the first glass layer has a thickness not exceeding 1.5 mm. 
     
     
         15 . The vehicle of  claim 12  wherein the second glass layer has a thickness of 2.0 mm or more. 
     
     
         16 . The vehicle of  claim 12 , wherein the first glass layer has a thickness not exceeding 1.5 mm and the second glass layer has a thickness of 2.0 mm or more. 
     
     
         17 . The vehicle of  claim 16 , wherein the first glass layer comprises an alkali aluminosilicate glass or an alkali aluminoborosilicate glass, and wherein the second glass layer comprises a soda lime glass. 
     
     
         18 . The vehicle of  claim 12  wherein the polymer interlayer comprises a material selected from the group consisting of poly vinyl butyral (PVB), polycarbonate, acoustic PVB, ethylene vinyl acetate (EVA), thermoplastic polyurethane (TPU), ionomer, a thermoplastic material, and combinations thereof. 
     
     
         19 . The vehicle of  claim 12 , wherein the first glass layer comprises an alkali aluminosilicate glass or an alkali aluminoborosilicate glass, and wherein the second glass layer comprises a soda lime glass. 
     
     
         20 . The vehicle of  claim 12 , wherein the first glass layer comprises a surface compressive stress of between about 250 MPa and about 350 MPa.