Preparing method of explosion-proof glass with electromagnetic shielding function

Abstract

The invention discloses a preparing method of explosion-proof glass with an electromagnetic shielding function. The method includes the following steps of firstly, conducting cleaning treatment on the surface; secondly, conducting drying treatment; thirdly, conducting spray-coating treatment on a bottom membrane; fourthly, conducting sputter coating treatment; fifthly, conducting thermal insulation treatment. The preparing method is simple in overall process, all the steps are reasonably matched, the use stability of the glass can be remarkably improved, the electromagnetic shielding capacity of the glass is improved, the service life is long, the comprehensive performance is good, and the great market competitiveness and economic benefits are realized.

Description

Technical field [0001] The invention belongs to the technical field of functional glass processing, and specifically relates to a method for preparing explosion-proof glass with electromagnetic shielding function. Background technique [0002] Due to the universal application of electronic technology, in order to prevent interference and information leakage within or between electronic equipment, special requirements for high shielding effectiveness and high light transmission are put forward for the human-computer interaction parts of electronic equipment, that is, when the light transmission rate is not lower than Under the premise of 70%, the electromagnetic shielding effectiveness is required to reach 40dB or more in the 30M~18GHz frequency band. At present, the electromagnetic shielding visual materials that have been widely used in electronic products and military products are mainly metal wire mesh, and some of them are realized by the technology of magnetron sputtering co...

AI Technical Summary

Problems solved by technology

At present, the electromagnetic shielding visible materials that have been widely used in electronic products and military products are mainly wire mesh, and some of them are realized by the technology of magnetron sputtering coated glass. The wire mesh shielding glass is made of two layers of float glass. Or chemically tempered glass is sandwiched with wire mesh, which has an absolute advantage in shielding effectiveness, but its light transmittance is relatively low, and there are also appearance problems such as wrinkles and mesh feeling. For example, the shielding effectiveness of 250-mesh or 100-mesh stainless steel can meet the requirements. However, its light transmittance is 42%~60%. Coated glass deposits a transparent conductive film on the glass surface by magnetron sputtering. At present, ITO is widely used, which has good conductivity and high Visible light transmittance, but the shielding effectiveness of coated glass with good conductivity still cannot meet the performance requirements of electronic equipment for electromagnetic shielding, and the shielding effectiveness in the GHz frequency band can only reach 20dB

In this regard, the existing technology focuses on enhancing the shielding performance of glass. For example, the application number is: CN201510988325.X discloses a method for improving the electromagnetic shielding efficiency of shielding glass in the GHz frequency band, wherein the upper end of the PET film or glass is used as a conductive grid, and then A multi-target magnetron sputtering coating machine is used to deposit a transparent conductive film on the surface to improve the shielding performance of the glass, which has achieved good results, but the light transmittance of the glass is weak, which affects the competitiveness and scope of application of the product.