Laminated glass with asymmetric thickness and production method thereof

Abstract

The invention relates to the technical field of laminated glass, in particular to laminated glass with an asymmetric thickness. The laminated glass with the asymmetric thickness comprises a thick glass plate and a thin glass plate which are subjected to brake bent forming and have different thickness, and a polymer intermittent layer which is arranged between the thick glass plate and the thin glass plate, and is characterized in that a softening-point temperature Tf1 of the thick glass plate and a softening-point temperature Tf2 of the thin glass plate satisfy the following relation: 10(15a-b+1)<=Tf2-Tf1<=15(20a-b+1), wherein equations are as shown in the description, t1 is the thickness of the thick glass plate, t2 is the thickness of the thin glass plate, R1 is infrared absorptivity ofunit thickness of the thick glass plate, R2 is infrared absorptivity of unit thickness of the thin glass plate, K1 is heat conductivity of the thick glass plate, K2 is heat conductivity of the thin glass plate, C1 is mean specific heat capacity, between a room temperature and the corresponding softening point temperature, of the thick glass plate, and C2 is mean specific heat capacity, between theroom temperature and the corresponding softening point temperature, of the thin glass plate.

Description

Technical field: [0001] The invention relates to the technical field of laminated glass, in particular to a laminated glass with an asymmetric thickness and a manufacturing method thereof, and is especially suitable for the laminated glass of a vehicle window. Background technique: [0002] In the forming process of laminated glass, two pieces of glass are generally laminated together, placed in the same temperature uniform thermal environment, and then hot-bent and formed. For glass of the same thickness, two pieces of glass can be bent at the same time, and there is a tight fit between them. For two pieces of glass with different thicknesses, due to the difference in thickness and thermal conductivity, the two pieces of glass have different temperature distributions before reaching complete thermal equilibrium. When the softening points of the two are the same or simply similar, the thick and thin glasses will have different Bending molding tends to lead to warping of gla...

AI Technical Summary

Problems solved by technology

However, with the diversification of automotive glass combinations and functions, a single viscosity control can no longer meet the molding needs of existing asymmetric combinations.

For example, for coated glass or tinted glass, the two pieces of glass will have different temperature distributions during molding due to the difference in heat transfer rate or heat reflectivity, and this factor will also significantly affect the bending properties of the double-piece glass

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