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High-durability thin-type IPS polaroid and manufacturing method thereof

A durable and polarizer technology, applied in the direction of optics, optical components, polarizing components, etc., can solve the problems of increasing product thickness, high moisture permeability, easy film breakage or wrinkling, etc., to reduce production processes, save time, and prevent volatilization Effect

Active Publication Date: 2017-04-26
SHENZHEN SAPO PHOTOELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires stricter process control, and it is also prone to other defects, such as the thinning of the TAC film, which is easy to break or wrinkle during the saponification process, and is also prone to warpage and edge problems of the polarizer, PVA Film thinning can cause appearance-affecting defects during PVA film stretching
[0004] Although the IPS display itself is designed to compensate the viewing angle, it is still necessary to use materials with a phase difference close to zero to correct the viewing angle in high-end product applications. The existing compensation film materials include TAC, PC, COP, PET, PMMA, etc. After saponification or corona treatment, other materials except TAC still cannot be effectively bonded to the PVA film, so the TAC film can only be bonded to the PVA film first, and then the pressure-sensitive adhesive on the outside of the TAC film can be bonded to the compensation film. Fitting, which increases the thickness of the product to a certain extent
In addition, choosing a compensation film made of TAC can solve the bonding problem, but due to its high moisture permeability, the durability of the product cannot meet the high durability requirements

Method used

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  • High-durability thin-type IPS polaroid and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The first step is to prepare a hydrophilic coating solution. The polyurethane is diluted with water to obtain the hydrophilic coating mother liquor; the auxiliary agent is added to the hydrophilic coating mother liquor to obtain the hydrophilic coating solution. The auxiliary agent includes 0.1% of the mass fraction of the hydrophilic coating solution, a leveling agent, 0.4% of a wetting agent, and 0.8% of a thickening agent.

[0030] Because the bubbles in the hydrophilic coating solution can cause point defects in the coating on the polarizer, such point defects are even visible to the naked eye. Therefore, the defoaming agent, the foaming agent and the foam breaking agent which account for 0.1% of the mass fraction of the hydrophilic coating solution are respectively added.

[0031] In order to increase the adhesion of the hydrophilic coating solution, 5% of the mass fraction of the hydrophilic coating solution is added with a silane coupling agent and 5% of a curing age...

Embodiment 2

[0040] The first step is to prepare a hydrophilic coating solution. The steps are the same as in Example 1, but the added additives include a leveling agent, 0.6% wetting agent, 1% thickener, 0.2% defoamer, and 0.2% of the mass fraction of the hydrophilic coating solution. 0.2% foam breaker, 10% curing agent. Do not add any foaming agent and silane coupling agent.

[0041] After adding all the additives, stir well, and then filter the hydrophilic coating solution with 2-3 layers of cotton or filter paper.

[0042] In the second step, a surface treatment agent is applied to the surface of the PC film, and the surface treatment agent is a corona-free surface treatment agent or a PET film attachment accelerator. After the treatment agent is applied, a hydrophilic coating solution is applied to the upper layer. The thickness of the dry glue is controlled at 10-12 microns by the method of scraping.

[0043] The third step is the same as the third step in Example 1.

[0044] The fourth ...

Embodiment 3

[0049] The first step is to prepare a hydrophilic coating solution. The steps are the same as in Example 1, but the added additives are 0.15% of the mass fraction of the hydrophilic coating solution, a leveling agent, 0.5% wetting agent, 1.2% thickener, 0.15% defoamer, 0.15% foam breaker, 10% silane coupling agent. Do not add any foaming agent and curing agent.

[0050] After adding all the additives, stir well, and then filter the hydrophilic coating solution with a 1 micron filter.

[0051] The second step is the same as the second step of Example 1, but the coating thickness is controlled at 7-10 microns.

[0052] The third step is the same as the third step in Example 1.

[0053] The fourth step is the same as the fourth step of Example 1, but the drying temperature of the PVA glue is 85°C for 2.5 minutes.

[0054] The fifth step is the same as the fifth step in Example 1.

[0055] The sixth step is the same as the sixth step in Example 1.

[0056] The seventh step is the same as t...

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PUM

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Abstract

The invention relates to a high-durability thin-type IPS polaroid and a manufacturing method thereof. The polaroid comprises a release film, a first inner protection film, a PVA film, a second inner protection film and a first outer protection film which are successively pasted from top to bottom. The polaroid manufacturing method comprises the following steps that the PVA film is pasted with the first inner protection film and the second inner protection film through a PVA glue; the second inner protection film is pasted with the first outer protection film; and finally the release film is pasted with the first inner protection film through a pressure-sensitive adhesive, and the first inner protection film selects an optical film material with low moisture penetrability and good optical transparency and simultaneously possesses an IPS compensation function. A purpose of high-durability thinning is realized.

Description

Technical field [0001] The invention relates to a high-durability thin IPS polarizer and a preparation method thereof. Background technique [0002] In recent years, with the popularization of mobile products such as smart phones and tablet computers, people have a strong demand for lighter, thinner, high-performance mobile display products. As the original polarizing and analyzer of the LCD screen, the polarizer is one of the indispensable key raw materials for the LCD screen equipment. The latest high-end IPS polarizers have the advantages of full viewing angle and no image retention, and are widely used in mainstream displays of mobile display devices such as mobile phones and tablet computers. [0003] At present, the main method for thinning IPS polarizers in the market is to thin the thickness of film materials such as PVA film and TAC film. However, this approach requires stricter process control, and it is also prone to other defects. For example, the thinning of TAC film...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02B1/14
Inventor 姜富方钱琨陈敏罗子安
Owner SHENZHEN SAPO PHOTOELECTRIC
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