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Preparation method of adhesive for polarizer and preparation method of polarizer

A technology of polarizers and adhesives, applied in the direction of adhesive types, polymer adhesive additives, unsaturated alcohol copolymer adhesives, etc., can solve the problem of poor high temperature resistance, high humidity and high temperature resistance, and cannot meet the requirements Product use requirements, the effect of bonding and other problems, to achieve good high temperature yellowing performance, good bonding performance, improve the effect of bonding performance and heat resistance

Active Publication Date: 2019-08-27
SHENZHEN SAPO PHOTOELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Iodine-based polarizers have the advantages of high transmittance and high degree of polarization, but their weather resistance, especially high temperature, high humidity and high temperature resistance is relatively poor
[0003] Although some researchers can make polarizers with excellent durability by adding phosphorus-containing additives in one or more of the dyeing, crosslinking and stretching processes; Medium durability under the condition of 90%RH*500Hr; at the same time, some polarizer manufacturers try to use new functional films to replace TAC film and improve the durability of polarizers to a certain extent, but these methods will As a result, the effect of the adhesive for polarizers on the bonding of opposite materials has been greatly reduced, and it still cannot meet the requirements of the product.

Method used

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  • Preparation method of adhesive for polarizer and preparation method of polarizer
  • Preparation method of adhesive for polarizer and preparation method of polarizer
  • Preparation method of adhesive for polarizer and preparation method of polarizer

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preparation example Construction

[0025] Such as figure 1 As shown, the preparation method of a polarizer in one embodiment includes the following preparation steps:

[0026] Step S110: Coating the adhesive for the polarizer on the cellulose triacetate film and the polyvinyl alcohol resin film respectively.

[0027] Specifically, the method of coating the adhesive agent for the polarizer on the cellulose triacetate film and the polyvinyl alcohol resin film is drop coating by rolling and spreading.

[0028] see figure 2 , wherein the adhesive for polarizers in step S110 is prepared by the following method:

[0029] Step S112: Swell the polyvinyl alcohol in water to obtain an aqueous solution containing swollen polyvinyl alcohol.

[0030] Among them, the degree of polymerization of polyvinyl alcohol is 1700-2500, so as to ensure the solid content and viscosity of the binder and ensure the bonding effect.

[0031] Among them, the degree of alcoholysis of polyvinyl alcohol is 85-99%.

[0032] Wherein, the st...

Embodiment 1

[0055] The preparation process of the polarizer of the present embodiment is as follows:

[0056] (1) Add polyvinyl alcohol powder into water, and soak at room temperature for 5 hours to obtain a soaking solution containing polyvinyl alcohol. Wherein, the degree of polymerization of the polyvinyl alcohol powder is 1700, and the alcoholysis degree of the polyvinyl alcohol is 88%. In the soaking solution containing the polyvinyl alcohol, the mass percentage of the polyvinyl alcohol is 10%.

[0057] (2) Under the condition of continuous stirring, the soaking solution containing polyvinyl alcohol was heated from room temperature for 35 minutes to 60°C, and kept at 60°C for 30 minutes to obtain an aqueous solution containing swollen polyvinyl alcohol. The aqueous solution of polyvinyl alcohol is heated from 60°C to 95°C for 35 minutes, then polyethylene glycol is added, kept at 95°C for 60 minutes, and then cooled down to 40°C for 45 minutes to obtain a pre-mixed solution. Wherein...

Embodiment 2

[0064] The preparation process of the polarizer of the present embodiment is as follows:

[0065] (1) Add polyvinyl alcohol powder into water, and soak at room temperature for 3 hours to obtain a soaking solution containing polyvinyl alcohol. Wherein, the degree of polymerization of polyvinyl alcohol is 2000, and the degree of alcoholysis of polyvinyl alcohol is 99%. In the soaking solution containing polyvinyl alcohol, the mass percentage of polyvinyl alcohol is 5%.

[0066] (2) Under the condition of continuous stirring, the soaking solution containing polyvinyl alcohol was heated from room temperature for 30 minutes to 50°C, and kept at 50°C for 20 minutes to obtain an aqueous solution containing swollen polyvinyl alcohol, and the immersion solution containing swollen The aqueous solution of polyvinyl alcohol is heated from 50°C to 90°C for 30 minutes, then polyethylene glycol is added, kept at 90°C for 60 minutes, and then cooled for 60 minutes to 30°C to obtain a pre-mixe...

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Abstract

The invention relates to a preparation method of a polaroid adhesive and a preparation method of a polaroid. The preparation method of the polaroid adhesive comprises swelling polyvinyl alcohol in water to obtain an aqueous solution containing swollen polyvinyl alcohol, heating the aqueous solution containing the swollen polyvinyl alcohol to 90-100 DEG C under stirring, then adding a modifier intothe mixed solution, keeping the temperature of 90-100 DEG C for 40 to 60 minutes, cooling the mixture to 40 DEG C or less to obtain a pre-mixed solution, adjusting pH of the pre-mixed solution to 1.5-2 under continuous stirring, and adding dialdehydes, additives, a cross-linking agent and alcohol into the pre-mixed solution for a cross-linking reaction at the room temperature so that an adhesiveis obtained. The polaroid adhesive obtained by the preparation method has good adhesive properties and improves high temperature and yellowing resistance of a polaroid.

Description

technical field [0001] The invention relates to a preparation method of an adhesive agent for a polarizer and a preparation method of the polarizer. Background technique [0002] Polarizer is the core material mounted on smart phones, PC monitors, TVs and other display devices. It is used to attach to LCD or OLED display panels to realize the passage and closure of light, so that the liquid crystal display device can achieve the purpose of visualizing the state of polarized light. . The current polarizer is usually a laminated structure of triacetate cellulose resin film (TAC film) and polyvinyl alcohol film (PVA film). Bond the TAC film and the PVA film together. The production principle is to use a mixture of dichroic iodine and potassium iodide or a dichroic dye as a polarizer, which is adsorbed on a stretched and oriented PVA film to produce a polarization effect. Iodine-based polarizers have the advantages of high transmittance and high polarization, but their weathe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J129/04C09J11/08C09J11/06G02B5/30
Inventor 陈学文钟伟宏陈敏徐凯
Owner SHENZHEN SAPO PHOTOELECTRIC
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