Process and equipment for manufacturing high-definition thin brightening type polyester base film

Abstract

The invention discloses a process for manufacturing a high-definition thin brightening type polyester base film. The process comprises the steps of raw material proportioning, film casting, longitudinal stretching, corona treatment, chemical treatment layer coating, transverse stretching, rolling and packaging. The raw materials comprise a master batch, organic silicon resin and an optical additive in a ratio of 89: 5: 6. Equipment comprises a melt extrusion system, a die head, a quenching drum, longitudinal stretching equipment, transverse stretching equipment and traction winding equipment, wherein the output end of the melt extrusion system sequentially passes through a pre-filtering box body, a gear metering pump, a fine filtering box body and a static mixer through a melt pipeline and then is connected to the die head. The technological process is reasonable in design and easy to operate, a protective film can be well attached by optimizing the raw materials and controlling the relation between the coating thickness and the coating liquid, the phenomena of adhesive residue and film surface point missing are avoided, and a good diffusion effect is achieved; and a cured coating is matched, so that the product has relatively high hardness and very good surface tension and stripping force.

Description

technical field [0001] The invention relates to the technical field of new polymer materials, in particular to a manufacturing process and equipment for a high-definition thin brightening polyester base film. Background technique [0002] The brightness enhancement film is also called the brightness enhancement board, the brightness enhancement film, the prism film, the prism sheet, etc. It is a key component in the backlight module of the liquid crystal display, which plays the role of gathering light and improving the brightness. The angle of incident light, especially the incident light at a large angle, can concentrate the light within the angle of 70°, so as to improve the brightness, uniformity and contrast of the emitted light. Generally, one or two brightness enhancement films are required in TFT-LCD displays. The mechanism of action is to concentrate the scattered light to the front to achieve the purpose of improving the brightness of the front. Recycling can redu...

AI Technical Summary

Problems solved by technology

[0003] The thinning development trend of electronic consumer products has led to the thinning of the entire optical module, and the brightness enhancement film is one of the representatives. The thin brightness enhancement is mainly used for small screens below 180mm, including mobile phones, tablets, etc., which are structurally Using PET film as the base material, some microprism structures are made on the PET surface to form an optical film. According to the different microprisms, it can be divided into type 2 and type 3; the existing polyester base film is sometimes used in the coating process. Insufficient brightness and clarity due to poor adhesion, or lack of film surface, and poor hardness, tension and peeling performance of the polyester base film, etc.

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