Electromagnetic shielding polaroid and preparation method thereof

Abstract

The invention discloses an electromagnetic shielding polaroid and a preparation method thereof. The electromagnetic shielding polaroid implements a function of shielding electromagnetic waves througha silver nanowire hardening layer coated on the surface of a TAC film on the outer layer of the Polaroid, wherein the silver nanowire hardening layer is composed of the following components by weight:10% - 30% of urethane acrylate monomer, 2% - 10% of aliphatic urethane diacrylate, 1% - 10% of pentaerythritol triacrylate, 0.5% - 5% of light Initiator 184, 2% - 10% of silver nanowire emulsion, 10%- 50% of MIBK and 10% - 50% of PMG. The above materials are uniformly mixed and then the mixture is coated on the TAC film, and then a silver nanowire hardening layer is formed on the surface of theTAC film, so that a polaroid is prepared, wherein the polaroid can be applied to a liquid crystal display of a vehicle-mounted wireless walkie-talkie to shield signal interference of external electromagnetic waves on the wireless walky-talky system; and the polaroid also has the advantages of high light transmittance, high water resistance, high heat resistance, antistatic property and the like.

Description

technical field [0001] The invention relates to the technical field of optical protective films, in particular to a polarizer that can shield electromagnetic waves and has excellent properties such as high light transmittance, good water resistance, good heat resistance, and antistatic properties. Background technique [0002] The wireless walkie-talkie is a two-way mobile communication tool that can be used for calls without any network support. It is suitable for relatively fixed and frequent calls. It is widely used in residential areas, buildings, and areas where the outdoor network is difficult to cover. Especially in vehicle products, its market demand is increasing. [0003] The vehicle-mounted walkie-talkie has a long distance, and the networking application distance is even longer. Therefore, it is widely used in many industries such as transportation, social services, disaster relief, forest fire prevention, and emergency communications. It is an important wireless...

AI Technical Summary

Problems solved by technology

The radio frequency power of the car walkie-talkie is large, which can easily cause various radio frequency interference to its own circuit, especially when the antenna is mismatched, the antenna is damaged and the mismatch causes large reflection power in actual use, which interferes with the car walkie-talkie and damages the final power tube. happens often

[0004] External electromagnetic waves interfere with the signal of the wireless intercom system, which not only leads to poor call quality but also greatly affects the performance and user experience of the vehicle-mounted intercom. Therefore, it is always desirable for those skilled in the art to effectively reduce various electromagnetic interferences on the car. pursued

[0005] With the development of information technology, displays have been widely used in various fields of information science. Liquid crystal displays are also used in vehicle-mounted wireless walkie-talkies, and polarizers are an important part of liquid crystal displays. Currently, in the existing technology, polarizers are often improved The performance of the polarizer is used to improve the function of the liquid crystal display, thereby improving the performance and power of the entire system; but the current polarizer basically only has some common properties, and does not have the performance of shielding electromagnetic waves. For example, a Chinese patent application 201310372840.6 discloses a An antistatic polarizer, which only improves the antistatic performance of the polarizer; another example is a high temperature resistant polarizer disclosed in Chinese patent application 201310236399.9; none of the polarizers disclosed in the above prior art has the performance of shielding electromagnetic waves , In addition, at present, the heat resistance and water resistance of the polarizer of the liquid crystal display are increasingly required. At the same time, static electricity and electrostatic discharge are ubiquitous in daily life. In the process of product manufacturing, the antistatic performance of the polarizer attached to the surface of the product LCD screen is particularly important, which is directly related to the performance and yield of the final product

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