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Preparation method of mixed PVA film and polarizer

一种混合型、混合染料的技术,应用在光学、偏振元件、光学元件等方向,能够解决碘系偏光片耐久性差、不适应高温高湿环境等问题,达到优偏光性、好偏光性和耐 High temperature and high humidity characteristics, the effect of improving the characteristics of high temperature and high humidity resistance

Active Publication Date: 2020-06-19
佛山纬达光电材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies of the prior art above, the purpose of the present invention is to provide a method for preparing a hybrid PVA film and a polarizer, aiming at solving the problem that the prior art iodine-based polarizer has poor durability and is not suitable for use in a high-temperature and high-humidity environment. Defects

Method used

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  • Preparation method of mixed PVA film and polarizer
  • Preparation method of mixed PVA film and polarizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of preparation method of mixed type PVA film, described method comprises steps:

[0034] Step S1. Washing: placing the PVA base film in a washing tank;

[0035] Step S2. swelling: place the cleaned PVA base film in a swelling tank containing 0.3% boric acid solution for swelling treatment;

[0036] Step S3. Dyeing: immerse the swollen PVA basement membrane in a dyeing tank containing a dyeing liquid for dyeing treatment, the dyeing liquid includes by mass percentage: 1.92% dichroic mixed dye, 0.7% iodine, and 1.8% potassium iodide %, boric acid 0.1%;

[0037] Step S4. Stretching: After the dyeing is finished, the PVA film is first cleaned in the cleaning tank, and then enters the stretching tank for stretching. The stretching ratio is 4.6 times that of the PVA base film, and the stretching tank solution is 3% boric acid solution. The temperature of the stretching bath is 52°C;

[0038] Step S5. Complementary color: the stretched PVA film is dipped in a color-r...

Embodiment 2

[0042] A kind of preparation method of mixed type PVA film, described method comprises steps:

[0043] Step S1. Washing: placing the PVA base film in a washing tank;

[0044] Step S2. swelling: place the cleaned PVA base film in a swelling tank containing 0.5% boric acid solution for swelling treatment;

[0045] Step S3. Dyeing: immerse the swelled PVA basement membrane in a dyeing tank containing a dyeing solution for dyeing treatment, the dyeing solution includes by mass percentage: 1.7% dichroic mixed dye, 0.85% iodine, 1.65% potassium iodide %, boric acid 0.3%;

[0046] Step S4. Stretching: After the dyeing is finished, the PVA film is first cleaned in the cleaning tank, and then enters the stretching tank for stretching. The stretching ratio is 4.93 times that of the PVA base film, and the stretching tank solution is 2.8% boric acid solution. The temperature of the stretching bath is 52°C;

[0047] Step S5. Complementary color: the stretched PVA film is dipped in a col...

Embodiment 3

[0051] A kind of preparation method of mixed type PVA film, described method comprises steps:

[0052] Step S1. Washing: placing the PVA base film in a washing tank;

[0053] Step S2. swelling: place the cleaned PVA base film in a swelling tank containing 0.5% boric acid solution for swelling treatment;

[0054] Step S3. Dyeing: immerse the swollen PVA basement membrane in a dyeing tank containing a dyeing liquid for dyeing treatment, the dyeing liquid includes: 1.6% dichroic mixed dye, 0.9% iodine, 1.75 potassium iodide by mass percentage %, boric acid 0.5%;

[0055] Step S4. Stretching: After the dyeing is finished, the PVA film is first cleaned in the cleaning tank, and then enters the stretching tank for stretching. The stretching ratio is 5.12 times that of the PVA base film, and the stretching tank solution is 3.1% boric acid solution. The temperature of the stretching bath is 52°C;

[0056] Step S5. Complementary color: the stretched PVA film is dipped in a color-rep...

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Abstract

The invention discloses a preparation method of a mixed PVA film and a polarizer. The preparation method comprises the following steps: washing, swelling, dyeing, stretching, color complementing and drying, the dyeing step comprises the steps that a swelled PVA-based film is soaked in a dyeing tank containing dyeing liquid for dyeing, dyeing liquid comprises iodine, potassium iodide, mixed dye andboric acid, and a mixed dye is formed by mixing four dichroic water-soluble dyes including yellow, blue, red and purple; the polaroid comprises a mixed type PVA (Polyvinyl Acetate) film. According tothe preparation method of the mixed PVA film, the high-temperature and high-humidity resistance of the PVA film is improved by adjusting the components and the concentration ratio of the dyeing liquid in the dyeing step, so that the prepared mixed polaroid has relatively good polarizability and high-temperature and high-humidity resistance, and has a relatively wide application range.

Description

technical field [0001] The invention relates to the technical field of polarizer preparation, in particular to a preparation method of a hybrid PVA film and a polarizer. Background technique [0002] Polarizer, referred to as polarizer for short, when natural light passes through the polarizer, the light whose vibration direction is perpendicular to the transmission axis of the polarizer will be absorbed, leaving only the polarized light whose vibration direction is parallel to the transmission axis of the polarizer. The polarization direction of a specific beam can be controlled. Polarizers are widely used in liquid crystal displays, the main function is to convert non-polarized natural light into polarized light, through the steering of liquid crystal, to control whether the light penetrates or not, and then produce the display effect of light and dark on the panel, using the liquid crystal molecules Twist the characteristics to achieve the degree of control of the passag...

Claims

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Application Information

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IPC IPC(8): G02B5/30
CPCG02B5/3033
Inventor 廖剑能
Owner 佛山纬达光电材料股份有限公司
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