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Water and high temperature resistant polarizer and preparation process thereof

A polarizer and high-temperature-resistant technology, applied in optics, optical components, polarizing components, etc., can solve the problems of long-wave light leakage, redness, erosion, etc., and achieve the effects of improving optical high-temperature resistance, improving water resistance, and avoiding erosion

Inactive Publication Date: 2018-06-05
恒美光电股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current polarizers and liquid crystal panels are eroded by water vapor during storage and transportation; the long-wave light leakage reddish reddish in the high-temperature reliability test of polarizers

Method used

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  • Water and high temperature resistant polarizer and preparation process thereof
  • Water and high temperature resistant polarizer and preparation process thereof
  • Water and high temperature resistant polarizer and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 ----- Improvement of water resistance and high temperature resistance (to prevent the polarizer from being corroded by external moisture)

[0030] ② TAC on the layer: the material used is hydrophobic material or hydrophobic material plus surface treatment (anti-glare effect), preferably the water transmission rate is 2 .day (WVTR) material, the thickness is 20 ~ 120um, and the optical transmittance is above 88%. Plastic transparent film materials, such as PET, PMMA and other materials with relatively low water permeability.

[0031] ③&⑤Layer: UV curing adhesive is used, and the curing mechanism of the UV adhesive is as follows

[0032] ◆absorption

[0033]

[0034] ◆Energy conversion energy conversion

[0035] PI*→I (the covalent bond is broken and becomes a free radical)

[0036] ◆polymerization

[0037] I+monomer→polymer (polymerization reaction between free radical and monomer)

[0038] The UV photoinitiator is a free radical photoinitiator, such ...

Embodiment 2

[0042] Embodiment 2--improvement of optical high temperature resistance (to prevent the color of the polarizer from turning red after high temperature)

[0043] When the water-based adhesive polarizer is subjected to high temperature, due to the absorption of long-wave I 5 - The chemical equilibrium changes after absorbing heat (I 5 - +I - →2I 3 -) , due to I 5 - The reduction of the long-wavelength band leads to an increase in the light leakage of the long-wavelength band (mainly the long-wavelength light leakage at 700nm), so after the polarizer is subjected to high temperature reliability, the display screen of the LCD panel will be reddish, such as figure 2 shown.

[0044] The polarizer manufacturing process is as follows:

[0045] PVA dyeing → stretching → complementary color → polarized photon heat drying → UV adhesive coating on both sides of PVA + upper / lower TAC bonding → UV ultraviolet curing

[0046] PVA dyeing: After the PVA film passes through the iodine ...

Embodiment 3

[0068] 1. The upper TAC adopts optical PET film, the thickness is preferably 20-120um, and the phase difference is >7000nm;

[0069] 2.UV glue is made of -OH-rich monomer oligomer, free radical photoinitiator is used, and the UV irradiation wavelength is 200-400nm;

[0070] 3. The lower TAC is made of cellulose triacetate, and the thickness is preferably 20-80um;

[0071] 4. PSA uses acrylate polymers with a molecular weight of 1 million to 2 million and adds hardeners, conductive agents, and silane coupling agents.

[0072] 5. The KI concentration of the extended and complementary color tanks is low KI concentration <5%, preferably 3-4%. This experiment uses 6%, 5%

[0073] 6. The drying oven adopts high temperature conditions, the temperature range is 40-100°C, preferably 75-95°C;

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Abstract

The invention relates to a water and high temperature resistant polarizer and a preparation process thereof. The water and high temperature resistant polarizer is formed by sequentially stacking a protective film, an upper TAC, a first UV adhesive layer, a polarized photon layer, a second UV adhesive layer, a lower TAC, a PSA layer and a release film, wherein the upper TAC adopts a material with the water penetration rate being less than 200g / m<2>.d, the thickness being 20-120um and the optical transmittance being over 88% or above. Compared with the prior art, the water and high temperature resistant polarizer and the preparation process thereof realize the beneficial effects that the water resistance of the polarizer is improved, and the erosion on the polarizer by moisture in the storage and transportation process of a liquid crystal panel is avoided; and the optical high temperature resistance of the polarizer is improved, and medium-long waveband light leakage and reddening in a polarizer high-temperature reliability test are prevented.

Description

technical field [0001] The invention relates to a water-resistant and high-temperature-resistant polarizer and a preparation process thereof. Background technique [0002] Polarizers are widely used in liquid crystal displays and other display devices. Especially with the rapid development of artificial intelligence in recent years, the application range of liquid crystal displays has become wider and wider, and the diversification of use environments and needs has led to market demand for polarizers with water resistance and high temperature resistance. High humidity performance is becoming more and more stringent. However, the current polarizers and liquid crystal panels are eroded by water vapor during storage and transportation; the long-wave light leakage in the high-temperature reliability test of the polarizers turns reddish. Contents of the invention [0003] In order to overcome the above-mentioned defects, the present invention provides a water-resistant and hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02B1/14G02F1/1335
CPCG02B1/14G02B5/305G02F1/133528
Inventor 朱洪彬
Owner 恒美光电股份有限公司