Composite functional film with high light transmission and UV (ultraviolet) filtering property

By employing a composite design consisting of a substrate layer, a bonding layer, a dual-mechanism UV filtration functional layer, an ultra-hard layer, and a surface functional layer, the problem of insufficient light transmittance and UV blocking capacity in existing technologies is solved, achieving high-efficiency UV filtration, mechanical durability, and self-cleaning functions, making it suitable for a variety of high-end applications.

CN121380951APending Publication Date: 2026-01-23CHONGQING YIGAO OPTOELECTRONICS CO LTD
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Patent Information

Application Number
CN202511548796.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-28
Publication Date
2026-01-23

AI Technical Summary

Technical Problem

Existing technologies struggle to achieve both high light transmittance and UV blocking capabilities while maintaining the mechanical durability and multifunctionality of thin films, and also suffer from issues such as durability, angle sensitivity, high cost, and complex processes.

Method used

The structure adopts a bottom-up design, including a substrate layer, a bonding layer, a dual-mechanism UV filtration functional layer, an ultrahard layer, and a surface functional layer, which are respectively composed of Cr or Ti layers, disordered multilayer dielectric films, plasmon resonance enhanced absorption layers, diamond-like carbon phase and hexagonal boron nitride nanosheet network structures, and TiO2/SiO2 composite photocatalytic layers. Through multilayer composite technology and precise interlayer design, efficient UV filtration and mechanical protection are achieved.

Benefits of technology

It achieves efficient blocking of UV light across the entire 250-420nm wavelength range, maintains extremely high visible light transmittance, possesses excellent mechanical durability and self-cleaning function, and is suitable for a variety of high-end application scenarios.

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Abstract

The invention relates to the technical field of functional films, and discloses a composite functional film with high light transmission and UV (ultraviolet) filtering property, which sequentially comprises a base material layer, a bonding layer, a dual-mechanism UV filtering functional layer, a superhard layer and a surface functional layer from bottom to top, the bonding layer is a Cr or Ti layer; the dual-mechanism UV filtering functional layer comprises a disordered multilayer dielectric film and a plasma resonance enhanced absorption layer; the superhard layer is of a three-dimensional interpenetrating network structure formed by a diamond-like carbon phase and hexagonal boron nitride nanosheets; the surface functional layer is a photocatalytic surface functional layer, and the photocatalytic surface functional layer is a TiO2 / SiO2 composite material with a micro-nano hierarchical porous structure. The composite functional film provided by the invention realizes high UV barrier and high light transmission balance, improves the mechanical durability of the film body, and is applicable to multiple scenes.
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