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Cover layer adhesive film for flexible display screen and preparation method of cover layer adhesive film

A technology for flexible display screens and cover layers, applied in coatings, adhesives, identification devices, etc., can solve the application of ultra-thin foldable displays and flexible display window covers, which cannot achieve folding performance life acceleration tests, transparent polymer films Difficulty and other problems, to achieve good interlayer adhesion, long service life, soft light effect

Active Publication Date: 2022-07-29
CHUZHOU JINQIAO TEXAS NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the application of SiO2 as the binder of the AF coating, the flexibility of the film is significantly reduced, and it cannot meet the requirements of the million-fold folding performance life acceleration test. Therefore, it is difficult to use traditional methods to manufacture transparent polymer films as ultra- Application of Thinned Foldable Displays and Window Covers of Flexible Displays

Method used

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  • Cover layer adhesive film for flexible display screen and preparation method of cover layer adhesive film
  • Cover layer adhesive film for flexible display screen and preparation method of cover layer adhesive film
  • Cover layer adhesive film for flexible display screen and preparation method of cover layer adhesive film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 4

[0038] Light transmittance, haze, water contact angle and light diffusivity were tested on the finished products of the flexible display cover film 1 prepared in Examples 1-3 and Comparative Examples 1-3, respectively. The results are shown in Table 2.

[0039] Table 2

[0040]

[0041]

[0042] Light transmittance: measure with DR81 light transmittance meter according to GB / T 2410-2008 measurement standard.

[0043] Haze: According to GB / T 2410-2008 measurement standard, measure with haze meter TH-100 equipment.

[0044] Water Contact Angle: The contact angle of deionized water was measured using a Model 590, p / n 590-F1 apparatus.

[0045] Light diffusivity: The transmittance and reflectance were measured using the goniophotometer GC5000L, and the diffusivity was calculated by a program built into the goniophotometer.

Embodiment 5

[0047] A flexible display screen was prepared by using the fully cured flexible display screen cover film 1 obtained in Examples 1 to 3 and Comparative Examples 1 to 5. The flexible display screen cover film 1, the color filter film 1 and the color filter film were laminated in sequence from top to bottom. Optical layer 2, liquid crystal layer 3, transparent electrode layer 4, lower polarizer 5, flexible backlight module 6, between the flexible display screen cover layer adhesive film 1 and the color filter layer 2, the flexible backlight module 6 and the lower The polarizers 5 are bonded together by optical glue, the lower polarizer 5 is attached under the transparent electrode layer 4, and the color filter layer 2 and the transparent electrode layer 4 are fixedly connected together by the sealant, so that the An accommodation space for filling the liquid crystal layer 3 is formed between the color filter layer 2 and the transparent electrode layer 4 . The surface of the flex...

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Abstract

The invention discloses a cover layer adhesive film for a flexible display screen and a preparation method of the cover layer adhesive film, the cover layer adhesive film comprises a base layer, a hard coating, a binder layer and a functional coating are sequentially laminated on the surface of the base layer, and the binder layer is made of an aerosol material. The binder layer is made of flexible silicon dioxide aerogel, the density value of the binder layer is 30-60 kg / m < 3 >, and the Young modulus is 1 * 10 < 5 >-1.5 * 10 < 5 > N / m < 2 >. According to the flexible display screen cover layer adhesive film provided by the invention, the synergistic effect of multiple coatings is exerted, the hard coating has high hardness, high toughness and high light transmittance, the binder layer has high light transmittance and flexibility, meanwhile, the adhesive film has good interlayer adhesion to the hard coating and the functional coating, and the functional coating has high flexibility and high light transmittance; the flexible display screen has the advantages that the flexible display screen is provided with the anti-fingerprint, anti-dazzle and anti-fogging effects, the transmitting light is soft and attractive while the permeability is not affected, in addition, the cover layer adhesive film of the flexible display screen has high repeated bending resistance, and the flexible display screen is particularly suitable for the flexible display screen and projection screen display.

Description

technical field [0001] The invention relates to the technical field of adhesive films, in particular to a flexible display screen cover layer adhesive film and its preparation. Background technique [0002] Transparent polymer films have been widely used as core materials in the optical and flexible display industries, and have been used as a substitute for glass in the display industry due to their light weight and ease of processing. [0003] With the continuous development and improvement of international and domestic flexible screens, including the continuous breakthrough in the thickness of flexible screen materials, the current domestic thinnest screen thickness is 0.03mm, and the number of folds is generally within 200,000 to 300,000 times. , The supporting research and development of the corresponding high-hardness hard coating in the flexible screen system is actively being carried out, which involves the film of foldable and flexible display including AF coating. ...

Claims

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Application Information

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IPC IPC(8): C08J7/04C08J7/046C09D4/02C09D4/06C09D7/61G09F9/30C09J1/00C08L67/02C08L81/06C08L33/04C08L79/08
CPCC08J7/042C08J7/046C09D4/06C09D7/61C09J1/00G09F9/301C08J2367/02C08J2381/06C08J2333/04C08J2379/08Y02E10/549
Inventor 王景泉
Owner CHUZHOU JINQIAO TEXAS NEW MATERIALS CO LTD