Surface protection film and use thereof

By synergistically designing a surface layer with UV protection, a core layer with nanofiber reinforcement, and a thermally stable adhesive layer, the problem of poor weather resistance of the surface protective film under ultraviolet light and high temperature was solved, achieving a surface protection effect with high light transmittance, low haze, and easy unwinding.

CN121450249BActive Publication Date: 2026-05-08ZHEJIANG JIEMEI ELECTRONICS & TECH
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Patent Information

Application Number
CN202610003587.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-01-05
Publication Date
2026-05-08
Estimated Expiration
2046-01-05

AI Technical Summary

Technical Problem

Existing surface protective films have poor weather resistance under ultraviolet radiation and high temperature environments, and are prone to yellowing and powdering. Furthermore, the adhesive layer softens at high temperatures, resulting in residual adhesive or inability to peel off.

Method used

The surface layer is composed of organic UV absorbers and inorganic UV shielding agents, the core layer is composed of polyaryletherketone nanofibers and flake mica powder, and the adhesive layer uses organic zinc complex and hydrogenated resin. The three layers work together to improve UV aging resistance and high temperature stability. The stepwise masterbatch and three-layer co-extrusion casting process ensures component dispersibility.

Benefits of technology

It achieves excellent adhesion under ultraviolet and high temperature conditions, is easy to unwind and leaves no residue, and has high light transmittance and low haze optical properties, making it suitable for surface protection of UV-resistant and high-temperature resistant materials.

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Abstract

The application relates to a surface protection film and a preparation method thereof, and belongs to the technical field of protective films. The surface protection film comprises a surface layer, a core layer and a bonding layer arranged in sequence; the surface layer comprises a first polypropylene base resin, an organic ultraviolet absorber and an inorganic ultraviolet shielding agent; the core layer comprises a second polypropylene base resin, polyaryletherketone nanofibers and flaky mica powder coated with cerium oxide; and the bonding layer comprises a thermoplastic SEBS elastomer, a hydrogenated bonding resin, an organic zinc compound, an ultraviolet light stabilizer and an epoxy group-containing plasticizer. The surface protection film has excellent ultraviolet aging resistance and high temperature resistance, the adhesion can be kept within a certain range under ultraviolet irradiation and high temperature conditions, the surface protection film can be easily unwound under high temperature conditions, and no residual glue is precipitated.
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