A kind of antistatic silica gel protective film and preparation method thereof

Abstract

The invention provides an antistatic silica gel protective film. A base layer is a polyurethane film. The base layer is coated with a bottom polythiophene coating layer. The bottom layer is coated with an organic silica gel aqueous layer. Transparent PET is pasted to the organic silica gel aqueous layer. The organic silica gel aqueous layer comprises a low viscosity silicone resin, a high viscosity silicone resin, carbon nanotubes, anhydrous toluene, anhydrous ethyl ester, a crosslinking agent, a coupling agent and platinum. The aligned carbon nanotubes are used in the silica gel protective film, have good affinity with the organosilicone pressure sensitive adhesive, do not affect the solidification of the platinum, have good dispersibility and maintain a good antistatic effect. The bottompolythiophene coating can improve the antistatic effect of the glue.

Description

technical field [0001] The invention belongs to the field of film materials, and in particular relates to an antistatic silica gel protective film and a preparation method thereof. Background technique [0002] With the rapid development of the electronics industry, the integration of electronic circuit boards is getting higher and higher. The high density of electronic components on the motherboard, the compact wiring, and even the widespread use of surface mount components can easily lead to electrostatic damage to circuit boards. . Silicone protective film is a screen protective film mainly used to protect electronic products. It is suitable for scratch-proof, dust-proof and radiation-proof protective films on the surface of mobile phones, computers, and various screen displays. The existing silica gel protective film on the market mainly includes two production and processing methods, one is to first coat a layer of polythiophene antistatic layer on the polyethylene ter...

AI Technical Summary

Problems solved by technology

The existing silica gel protective film on the market mainly includes two production and processing methods, one is to first coat a layer of polythiophene antistatic layer on the polyethylene terephthalate (PET) film, and then coat Silicone pressure-sensitive adhesive, although the release force and antistatic performance of the processed silicone protective film are stable, but because it needs to be coated twice in the production process, the production cost is high and the economic benefit is reduced. The antistatic agent is directly added to the pressure-sensitive adhesive formula. Although the silicone pressure-sensitive adhesive with the antistatic agent only needs to be coated once, the production efficiency is high, but the antistatic agent itself will make the silicone pressure-sensitive adhesive in the production process The platinum catalyst is poisoned, and the antistatic agent itself absorbs a large amount of water in industrial production, so that the curing of the silicone pressure-sensitive adhesive becomes incomplete and unstable, resulting in unstable adhesion of the finished silicone protective film after final production and processing. The quality is low, and it is difficult to meet the needs of use. Because of the above-mentioned many problems in the production and processing of the existing silica gel protective film, it is difficult to realize the needs of industrial production.

For the protection of screen panels such as mobile phones, the protective film generally used is composed of a base material layer and an adhesive layer coated on the base material layer. The existing adhesive layer generally uses ordinary acrylic glue, which belongs to Solvent-based acrylic glue adhesives are generally difficult to coat evenly, making it easy to leave air bubbles when they are attached, and some grease, dust, etc. will enter the pores, causing corrosion to the attached surface, and it will leave behind when it is torn off. There are traces that are difficult to remove, and the residual glue is serious

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