Self-absorbing self-exhausting silica gel, preparation method and tempered glass protective film for its application

Abstract

The invention discloses self-adsorption and self-exhaust silica gel, a self-adsorption and self-exhaust silica gel preparation method and a tempered glass protection film applying the self-adsorption and self-exhaust silica gel, and belongs to the field of polymer materials. The self-adsorption and self-exhaust silica gel comprises, by weight, 1,000-4,000 parts of methyl vinyl silicone rubber, 2,000-20,000 parts of methylbenzene, 50-300 parts of silicone resin, 8-20 parts of ethynyl cyclohexanol, 20-60 parts of vinyl silicone oil, 3-18 parts of organic silicone cross-linking agents and 5-20 parts of organic silicon catalysts. The tempered glass protection film is composed of tempered glass, an acrylic adhesive layer, a PET layer and a self-adsorption and self-exhaust silica gel layer from top to bottom, and the thickness of the tempered glass protection film is 390-650 microns. According to the tempered glass protection film applying the self-adsorption and self-exhaust silica gel, the problems that common silica gel is poor in exhaust and light transmittance, has bubbles and easily produces splay marks and other problems which are always difficult to solve in the industry are solved, and meanwhile the problems that the common silica gel will have snowflake lines, splay marks and streaks and other uneven problems during self adsorption and self exhaust can be solved.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a self-absorbing and self-exhausting silica gel, a preparation method and a tempered glass protective film for its application. Background technique [0002] Tempered glass belongs to safety glass and is a kind of prestressed glass. In order to improve the strength of glass, chemical or physical methods are usually used to form compressive stress on the glass surface. When the glass is subjected to external force, it first offsets the surface stress, thereby improving Bearing capacity, enhance the glass's own wind pressure resistance, cold and heat resistance, impact resistance, etc. [0003] The tempered glass protective film is to use the strength of tempered glass and the exhaust adsorption effect of special silicone resin to make the tempered protective film perfectly adhere to the mobile phone screen, which plays a vital role in the protection of the mobile phone...

AI Technical Summary

Problems solved by technology

[0003] The tempered glass protective film is to use the strength of tempered glass and the exhaust adsorption effect of special silicone resin to make the tempered protective film perfectly adhere to the mobile phone screen, which plays a vital role in the protection of the mobile phone screen. Now the silicone The disadvantages are poor exhaust performance, poor self-adsorption performance, and poor tolerance to dust. When coating, the precision of the machine is very high. The machine must not vibrate, the guide roller must not be bent by dust, and the environmental requirements are generally above 1,000 grades. Produced in a clean room, the wet coating volume error of coating equipment is generally within 1 μm, and even higher according to the change of solid content

[0004] Some domestic companies have also launched tempered glass protective films one after another, but the layer of silica gel used to paste mobile phone screens has not yet been localized, and it mainly relies on imports.

Domestic silica gel can not solve various problems such as poor adsorption and degassing on the silica gel surface, low light transmittance, easy to leave residual glue, and easy to produce water lines and bubbles.

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