Composite foam adhesive and liquid crystal display comprising same

Abstract

The invention provides a composite foam adhesive and a liquid crystal display comprising the same. According to the composite foam adhesive, through the five-layer structural design of the first acrylic acid adhesive layer, the TPU stretchable layer, the polyurethane foam layer, the PET layer and the second acrylic acid adhesive layer, the composite foam adhesive which is light in weight and better in softness and has a certain compression amount is prepared. The composite foam adhesive can effectively solve the problems of flexible screen fragmentation, vertical lines and adhesive tape cracking caused by friction in the repeated movement process of changing a prepared liquid crystal display from a straight surface to a curved surface or changing the liquid crystal display from the curved surface to the straight surface, and has important research value.

Description

technical field [0001] The invention belongs to the technical field of display devices, and in particular relates to a composite foam glue and a liquid crystal display comprising the same. Background technique [0002] There are two fixed forms of TVs on the market: straight and curved. Generally, ordinary PU foam tape is used to assemble the screen body and the metal or plastic backplane structural parts. The TV is fixed in a straight or curved state, and with the With the development of TV display screens and consumer demand for scene-based applications, OLED flexible screens make it possible for large-size TV screens to change from flat to curved. Foam tape adopts advanced automatic continuous coating line, and uses PU, PE, EVA, XPE, EPDM, rubber and plastic, needle felt, hot-melt felt and other foam as the base material to coat various High-quality self-adhesive with various high-quality auxiliary materials, soft, heat-insulating, heat-preserving, and sealing adhesive t...

AI Technical Summary

Problems solved by technology

[0004] However, ordinary PU foam is weak in strength, and it is easy to crack when it is applied to the repeatedly bent flexible screen and the metal or plastic backplane, which will cause the screen to fall off; while the cost of OCA laminating tape is high, and large-size die-cutting is difficult. The environment and equipment requirements are high, and the requirements for the lamination environment, lamination equipment precision, and material tolerance are high, the lamination yield is low, and lamination inspection is difficult. At the same time, the film (less than 0.25mm) is thin, and it is used for TV. When the upper screen is bonded to a metal or plastic backplane, there is no buffer space during the bending process of the backplane, and friction is prone to cause defects such as screen fragmentation and vertical lines.

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