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Adhesive for flexible display and flexible display assembly layer

A flexible display and adhesive technology, applied in the direction of adhesive types, ester copolymer adhesives, polymer adhesive additives, etc., can solve problems such as insufficient bending performance, and achieve modulus stability. , to meet performance requirements and improve the effect of bending life

Active Publication Date: 2021-04-09
新纶电子材料(常州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the OCAs used for flexible displays on the market are mainly acrylic systems, but the bending performance is far from meeting the needs of actual products and consumers

Method used

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  • Adhesive for flexible display and flexible display assembly layer
  • Adhesive for flexible display and flexible display assembly layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Mix 100 parts of acrylate polymer 1 and 0.2 parts of polyurethane crosslinking agent evenly, coat it on the polyester release film, put it in an oven at 80°C for 5 minutes, wait for the solvent to evaporate completely, and then apply another layer of polyester release film. type film, put the formed three-layer structure film in a 60°C oven for 48hrs, and then use 1000mj / cm 2 UV energy is used for curing to form a cross-linked network structure.

[0058] Examples 2-6 and Comparative Example 1 were cross-linked and cured according to the formulation information in Table 1 and the same process as in Example 1. In comparative example 2, only thermal curing was performed without subsequent UV curing.

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Abstract

The invention provides an adhesive for flexible display and a flexible display assembly layer. The adhesive for flexible display includes: an acrylate polymer, which has a reactive group in a side chain of the polymer molecular chain; a flexible cross-linking agent, which is an oligomer of which the weight-average molecular weight is greater than or equal to 1kDa; wherein the polymer and the flexible cross-linking agent are cured to form a cross-linked network structure. The adhesive provided by the invention has excellent high and low temperature modulus stability, rapid creep recovery and stress relaxation performance, and greatly prolongs the bending life of the flexible display device on the premise of realizing effective adhesion.

Description

technical field [0001] The invention relates to the technical field of adhesives, and specifically discloses an adhesive for flexible display and a flexible display component layer. Background technique [0002] Foldable display devices, such as foldable mobile phones, can not only realize the integration with large-screen devices such as tablets, meet consumers' needs for large screens, but also meet the requirements for portability. However, the difficulty of foldable display is that each layer of material needs to have good bending resistance, including organic light emitting display (OLED, Organic Light Emitting Display) module, touch module and cover plate, etc. On the one hand, it is more difficult to avoid abnormalities such as bubbles, delamination and peeling between layers during the bending process. For general hard-screen OLED or liquid crystal display (LCD, Liquid Crystal Display), layers are effectively bonded by optical clear adhesive (OCA, Optical Clear Adhe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J11/08G09F9/30
CPCC09J133/066C09J11/08G09F9/301C08L2205/03C08L2205/035C08L75/04C08L101/00Y02E10/549
Inventor 方龙江华
Owner 新纶电子材料(常州)有限公司
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