Online lamination protection film of light guide plate and preparation process of online lamination protection film

Abstract

The invention discloses an online lamination protection film of a light guide plate and a preparation process of the online lamination protection film. The online lamination protection film of the light guide plate comprises a base material surface layer, a core layer and an elastomer layer, wherein the core layer is arranged between the base material surface layer and the elastomer layer, and the base material surface layer, the core layer and the elastomer layer are integrally formed by virtue of a co-extrusion process. The protection film is stable in viscosity, good in light guiding property, excellent in high-temperature high-humidity aging resistance, and free from scratching a protected surface; and the viscosity of the protection film is not changed along with the temperature rising/lowering, can be repeatedly laminated and can avoid the adhesive residue phenomenon. Therefore, the protection film is very suitable for being used as the protection film of the light guide plate.

Description

Technical field [0001] The invention relates to a protective film, in particular, to a protective film used for online bonding of light guide plates and a preparation process thereof. Background technique [0002] The light guide plate is a product with high transparency and high clarity. It has high requirements for the production environment and surface quality. In order to avoid the light guide plate from being rubbed during processing, handling and transportation, or the surface is scratched due to improper operation Or sticking to the problem of dust and oil, it is necessary to stick a protective film on the surface of the light guide plate, and then remove the film after finishing transportation, storage, processing and assembly. At present, most of the protective films on the market (take the poly-terephthalic acid and dilipid protective film as an example), this protective film has various defects: [0003] 1. The viscosity of the protective film is mainly determined by th...

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Problems solved by technology

[0004] 2. Generally, there is a tear line on the protective film, and the process of tearing or cutting along the tear line is carried out. However, when the existing protective film is cut and torn along the tear line, it is often damaged and the tearing force is small. and so on

[0005] 3. Since the viscosity of the protective film will increase with the increase of temperature

When cutting, the saw blade runs at high speed and the temperature rises, so the film and the film often stick together during cutting, resulting in inconvenient operation and other problems

[0006] 4. The existing protective film is prone to residual glue in the production process. The main reasons for the residual glue are: ①Aging of the glue; ②Poor temperature resistance. The properties of the substances are similar, resulting in the migration of residual glue between molecules; ④Exceeding a certain tensile strength and peel strength, each adhesive product has its limit. glue

The appearance of residual glue makes it difficult to fit the entire protective film, and its temperature resistance is also poor

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