Lightweight and high-strength electromagnetic shielding windshield and manufacturing method thereof

Abstract

The invention relates to a piece of electromagnetic shielding glass and a manufacturing method thereof, specifically, to a piece of light high-intensity electromagnetic windshield glass with an electric heating function and a manufacturing method thereof. A metal grid structure is prepared on a flexible substrate to realize the electromagnetic shielding function; combination with the traditional electric heating glass manufacturing process is carried out to prepare a piece of light high-intensity electromagnetic shield glass. On the one hand, the intensity reduction caused by preparing a low-resistance transparent conductive film on a piece of load-bearing glass is avoided; and on the other hand, the conflict between the high shielding performance and the high light transmittance requirement of the traditional electromagnetic shielding glass is eliminated. The prepared electromagnetic shielding glass has the high light transmittance larger than or equal to 75%, the reduced weight withthe surface density less than or equal to 10kg / m<2>, and the high intensity; the total thickness does not exceed 6.0 mm and the shielding performance is larger than o equal to 40 dB(0.3-18 GHz). And the glass is resistant to the impact by a bird with the weight of 1.0kg at the speed less than or equal to 330km / h without any penetration and piece spatter.

Description

technical field [0001] The present invention relates to an electromagnetic shielding glass and its manufacturing method, more specifically, to a light-weight high-strength electromagnetic shielding windshield glass with electric heating function and its manufacturing method. Background technique [0002] Electromagnetic shielding is a method of confining electromagnetic waves to a certain area through shielding bodies such as shells, boxes, and plates made of metal. Electromagnetic shielding has a wide range of applications in electronics, communications, aviation and other fields. For aircraft, the windshield is one of the weakest parts of aircraft electromagnetic shielding because it needs to have functions such as lighting, providing a clear view, anti-bird strike, and electric heating. Traditional electromagnetic shielding glass is designed according to the requirements of shielding effectiveness (CN 104582457 A, CN104841621 A, CN 101245685 B), and generally two pieces ...

AI Technical Summary

Problems solved by technology

However, for electrically heated windshields with high shielding performance requirements (the shielding performance is not less than 40dB in the range of 1-18GHz), the resistance of two transparent conductive films (electric heating film and electromagnetic shielding film) is very low (≤2Ω / □)

There are several disadvantages in this preparation method: first, the preparation of low-resistance (≤2Ω / □) thin film is difficult to realize in engineering, even if a low-resistance thin film is prepared, the light transmittance does not meet the requirements; the second electric heating power requirement The square resistance of the electric heating film cannot be too low, which requires further reduction of the resistance of the electromagnetic shielding film

Third, in the process of preparing the transparent conductive film, the stress of the strengthened glass substrate will attenuate at high temperature, resulting in a decrease in strength and affecting the service life of the product

The above three factors have become difficult problems restricting the development of high-performance electromagnetic shielding glass

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