Process for preparing base film for polaroid protective film, and equipment

Abstract

The invention relates to a process for preparing a base film for a polaroid protective film, and equipment. The equipment comprises a die head, a material conveying pipeline, a metering extruder, a filter, a mixing container, a direct current motor, an electronic element, a control system, a metering pump and a polyester casting sheet. According to the process for preparing the base film for the polaroid protective film, and the equipment, a produced base film product has excellent optical apparent performance, the surface of the protective film is free of defects such as foreign matter, white points, scratching and creases, polaroid apparent testing can be conveniently carried out under the condition that the protective film is not removed, meanwhile, damage and pollution of various defects to a TAC film are prevented, weather resistance and permanent adhesion stability are achieved, the stripping force is not obviously increased after several days or longer, and the protective film is easy to tear off, has no residual glue and no mark on a protected surface, has good adhesion performance on the protected surface, does not tilt or fall off in a material carrying or processing process, and is subjected to antistatic treatment so as to be low in electric quantity and prevent electrostatic dust adsorption from polluting the surface of a polaroid.

Description

technical field [0001] The invention relates to the technical field of polyester optical films, in particular to a preparation process and equipment for a base film for a polarizer protective film. Background technique [0002] The base film for polarizer protective film is provided by the upstream manufacturer of the polarizer manufacturer. From the perspective of the polarizer structure, there are protective film, TAC film, PVA film, PSA pressure-sensitive adhesive, etc., and PVA film is the substrate of polarized light, which is the polarizer. The core part of the film determines the key optical indicators such as the polarizing performance, transmittance, and color tone of the polarizer, but the PVA film is easily affected by external moisture to change its orientation and affect the polarization effect. Adhere to the PVA protective film (base film) with excellent optical properties. The common polarizer protective films mainly include PE series and PET series. In the po...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a base film preparation process and equipment for polarizer protective film to solve the problems of pulling wires and difficult peeling when peeling off the release film

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