Black matte epoxy adhesive film for display module and preparation method of black matte epoxy adhesive film

By designing a four-layer composite structure and optimizing the raw material formula of the black matte epoxy film, the problems of large equipment investment, severe warping, and poor ink color consistency in COB display panel packaging have been solved, achieving efficient production and stable packaging results.

CN122104081APending Publication Date: 2026-05-29DONGGUAN XILES TECH CO LTD
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Patent Information

Application Number
CN202610380532.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-26
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing epoxy films used for COB display panel encapsulation suffer from problems such as high investment in molding equipment, low efficiency, high internal stress, severe warping, easy peeling of OCA film edges, and poor ink color consistency of black film layer, which affect the structural stability and service life of display modules.

Method used

The design incorporates a four-layer composite structure consisting of a light release film layer, a transparent adhesive film layer, a black adhesive film layer, and a heavy release film layer. The formulation of each adhesive layer is optimized, and modified UV resins and light diffusing agents are used to form a black matte epoxy film through roller coating and UV curing processes.

Benefits of technology

It improves the curing efficiency and mechanical stability of the adhesive film, avoids glare on the display panel, reduces internal stress, enhances production efficiency and product quality, ensures the consistency and flexibility of the adhesive film, and reduces production costs.

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Abstract

The invention discloses a black matte epoxy adhesive film for a display module and a preparation method thereof.The adhesive film sequentially comprises a light release film layer, a transparent adhesive film layer, a black adhesive film layer and a heavy release film layer, and the transparent adhesive film layer and the black adhesive film layer both contain epoxy resin, an epoxy curing agent, modified UV resin and other raw materials according to a specific proportion; the modified UV resin is prepared from polyol, isocyanate and hydroxyl acrylate through a specific process, black and transparent film layer glue is prepared step by step, and a four-layer composite structure is formed through double-roller coating, compounding and weak light curing. The adhesive film is excellent in matt effect and ink color consistency, low in internal stress, firm in bonding, high in environment-resistant stability, simple and efficient in preparation process and small in equipment investment, meets the packaging requirement of the display module and is suitable for large-scale mass production.
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