Frame sealant composition and display device

Abstract

The invention discloses a frame sealant composition capable of improving a residual image. Novel dual-cured resin materials are introduced into a conventional frame sealant system and serve as components of an auxiliary frame sealant to form a frame sealant system in a multi-cured mode. The frame sealant system has thermo-curing and / or UV curing properties of a main adhesive to endow the main adhesive with sufficient strength, the auxiliary frame sealant can be UV-cured and moisture-cured through corresponding curing groups, and a glass substrate can be combined with the main adhesive and a frame sealant together, so that the phenomenon of insufficient adhesion force caused by solvent molecules such as water vapor when the glass substrate is packaged by a conventional frame sealant is avoided, and the frame sealant is high in adhesion strength and excellent in puncture resistance.

Description

technical field [0001] The invention relates to the field of liquid crystal displays, in particular to a frame sealant composition and a display device. Background technique [0002] Currently, in the development of display devices, narrow borders and high picture quality have become the common goals of manufacturers and demanders. However, in the development of the narrow frame, the commonly used alignment film material polyimide (PI) and sealant (Sealant) are repeatedly coated (overlap, that is, polyimide and sealant are overlapped). During the cleaning process of the alignment film material polyimide after rubbing, simple air knife (Air Knife) and infrared drying (existing washing method) are difficult to remove the strong adsorption on the polar active alignment film material polyimide. Water molecules or other wash solvents on the imine surface (see figure 1 ), and then the alignment film material polyimide has insufficient adhesion to the frame sealant, resulting in ...

AI Technical Summary

Problems solved by technology

However, in the development of the narrow frame, the commonly used alignment film material polyimide (PI) and sealant (Sealant) are repeatedly coated (overlap, that is, polyimide and sealant are overlapped). During the cleaning process of the alignment film material polyimide after rubbing, simple air knife (Air Knife) and infrared drying (existing washing method) are difficult to remove the strong adsorption on the polar active alignment film material polyimide. Water molecules or other wash solvents on the imine surface (see figure 1 ), and then the alignment film material polyimide has insufficient adhesion to the frame sealant, resulting in insufficient adhesion (that is, Peel Off does not meet the standard) or high-temperature residual image in the reliability evaluation

In addition, when the alignment film material polyimide and the sealant are coated without overlapping, a certain amount of water molecules will also be adsorbed in the coated area. At the same time, water molecules or other solvent molecules will undergo friction treatment over time. Afterwards, the curved surface diffuses along the friction treatment direction, and when the diffused water molecules enter the sealant area, the phenomenon of insufficient adhesion between the alignment film material polyimide and the sealant will occur.

However, the existing sealant components are usually UV curing, heat curing or both curing methods, which cannot avoid the influence of moisture, so the adhesion performance of the sealant cannot be effectively increased. In the design, there are often problems of substandard reliability

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