Heat strengthening laminated glass

Abstract

The present invention relates to a laminated glass, particularly to a heat strengthening laminated glass with a suitable middle region mechanical strength and a high edge region mechanical strength, wherein the heat strengthening laminated glass comprises a first glass plate, a second glass plate and an intermediate film, at least one of the first glass plate and the second glass plate is a heat strengthening glass plate, the heat strengthening laminated glass comprises a middle region and an edge region, and the edge region comprises an edge compressive stress region and an edge tensile stress region, wherein the maximum edge compressive stress of the edge compressive stress region is more than 18 MPa, the maximum edge tensile stress of the edge tensile stress region is less than or equal to 7 MPa, and surface stress of the heat strengthening laminated glass is more than 6 MPa and is less than 14.8 MPa. The heat strengthening laminated glass has the following advantages that: penetration resistance is good, safety performances and regulatory requirements of vehicle parts are met, and damage on the glass periphery during an installation and use process can be avoided.

Description

Technical field: [0001] The invention relates to a laminated glass, especially a heat-strengthened laminated glass with suitable mechanical strength in the middle region and higher mechanical strength in the edge region, especially suitable for automobile windshield and skylight glass. Background technique: [0002] Even if the laminated glass is damaged by external force, there are few glass fragments, and the damage to the driver and passengers is small. It is a kind of safety glass, so laminated glass is widely used in the window glass of vehicles, aircrafts, buildings, etc. If the surface stress of the glass is too large, it is often difficult for the glass to break when people hit it, so it cannot provide the necessary buffer and safety protection for the hit person, and the high surface stress will cause fine glass fragments to be produced after the damage. Fragments sticking to the interlayer film of laminated glass will affect the vision of vehicle drivers and passen...

AI Technical Summary

Problems solved by technology

[0009] Although the above-mentioned method obtains a bendable low-E coated glass, and solves the problems of corrosion of the low-E film layer and propagation of electromagnetic waves, problems such as insufficient glass strength and easy breakage still occur in actual production.

Due to the low infrared transmittance and low infrared absorptivity of the low-e film layer, the glass in the coating area absorbs heat slowly when it is formed and heated, but the surrounding area and the area that needs electromagnetic wave transmission without low-e coating are not heated. Obstruction, and because glass is a poor conductor of heat, there is a significant temperature difference between the coated area and the uncoated area. After annealing, a large internal tensile stress is generated, and glass damage is prone to occur.

Images