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

A preparation process and technology of protective film, applied in the field of preparation process and equipment of base film for polarizer protective film, can solve problems such as wire drawing, peeling difficulty, etc.

Pending Publication Date: 2021-07-06
SHANDONG SNTON OPTICAL MATERIALS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a base film preparation process and equipment for pol...

Method used

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

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Embodiment Construction

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] Such as Figure 1-Figure 7 : figure 1 It is the schematic diagram of the extruder. The temperature of each zone in the metering extruder 3 is related to the raw materials used. For raw materials with a low fluid index, the temperature of each section in the metering extruder 3 is relatively high. When the melt flow index is high The temperature of each area should be low. From the perspective of the whole body, the temperature of the two areas at the f...

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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...

Claims

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Application Information

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IPC IPC(8): B29D7/01
CPCB29D7/01
Inventor 李刚程凡宝孙艳斌杨彪李明勇李宇航刘小东杨建鹏李彬彬孙楠楠
Owner SHANDONG SNTON OPTICAL MATERIALS TECH CO LTD
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