Laminated glass for vehicle window and preparation method thereof

Abstract

The invention provides laminated glass for a vehicle window. The laminated glass comprises a first glass layer, a second glass layer and a composite middle layer arranged between the first glass layer and the second glass layer. The first glass layer and the second glass layer are non-chemically strengthened glass; the thickness of the first glass layer and the thickness of the second glass layer are both smaller than or equal to 2.1 mm. The composite middle layer comprises a first rigid layer, a flexible layer and a second rigid layer which are stacked in sequence; the first rigid layer is located between the first glass layer and the flexible layer; the second rigid layer is positioned between the flexible layer and the second glass layer; the elastic modulus of the first rigid layer and the second rigid layer is greater than or equal to 300Mpa; and the elastic modulus of the flexible layer is less than or equal to 10Mpa. The laminated glass has good impact resistance and penetration resistance, the thickness of glass in the laminated glass is small, and the weight of the laminated glass can be greatly reduced. The invention further provides a preparation method of the laminated glass for the vehicle window.

Description

technical field [0001] The application relates to the technical field of automobile windows, in particular to a laminated glass for automobile windows and a preparation method thereof. Background technique [0002] The window is an important part of the car. In order to ensure the safety of driving, the glass used for the window requires safety performance parameters such as high strength and rigidity. At the same time, the weight of the window generally accounts for 3%-10% of the total weight of the vehicle body. Therefore, reducing the weight of the window can effectively reduce the overall weight of the car, thereby reducing the fuel consumption level of the car. [0003] Laminated glass is a composite glass product consisting of two or more pieces of inorganic glass with one or more organic material layers sandwiched between them. Laminated glass has good safety and sound insulation, and can be used as front windshield glass, side window glass, skylight glass, etc. whe...

AI Technical Summary

Problems solved by technology

The weight of the laminated glass can be reduced by reducing the thickness of the single glass, but this will reduce the overall strength and sound insulation of the laminated glass, and it is difficult to ensure that the laminated glass has good safety and comfort

[0004] In the prior art, there are generally two options for reducing the thickness of a single piece of glass. One is to use chemically strengthened glass to increase the crack resistance of laminated glass. The hot wire and the silver paste antenna have certain limitations; and the adhesion between the chemically strengthened glass and the organic material layer is poor, which is prone to problems of debonding, sharp broken fragments, and falling off and splashing of fragments; in addition, chemically strengthened glass does not Conducive to adding functional coatings, not in line with the current development trend of automotive glass

Another solution to reduce the thickness of a single piece of glass is to use a rigid interlayer with a high modulus of elasticity, but the combination of thin glass and rigid layers is difficult to meet the requirements of automotive glass safety regulations to resist high energy penetration and sharp object puncture performance. In case of severe impact, the rigid middle layer is also not conducive to energy dissipation during head impact

In order to reduce the thickness of a single piece of glass, realize the thinning of laminated glass, and ensure that the window glass meets the requirements of automotive glass safety regulations, it is necessary to provide a thinner laminated glass for car windows to solve the problem of existing car windows. The problem of poor safety of thin laminated glass

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