Blue-light-proof film and preparation method thereof

Abstract

The invention provides a blue-light-proof film which comprises a thermoplastic base material and a functional coating arranged on the thermoplastic base material; a blue-light-proof coating is arranged on one surface, opposite to the functional coating, of the thermoplastic base material, and / or, the blue-light-proof coating is arranged between the thermoplastic base material and the functional coating. Compared with the prior art, two UV-cured optical coatings are arranged on the thermoplastic base material, the two UV-cured optical coatings are the blue-light-proof coating and the functional coating respectively; by mixing the ratio of components in a reactive diluent, the blue-light-proof coating has good flexibility and re-coating adhesive force, and interlayer separation is not easyto occur; no blue light blocking agent is contained in the functional coating, the influence of the blue light blocking agent on the UV curing condition is eliminated, the functional coating can be easily endowed with other properties, by mixing the types and proportions of main body resin and the reactive diluent, the functional coating has good flexibility, and cracking and falling of the coating cannot be caused in the hot-pressing molding process.

Description

Technical field [0001] The invention belongs to the technical field of optical films, and in particular relates to an anti-blue light film and a preparation method thereof. Background technique [0002] Smart devices represented by smart phones and smart watches are playing an increasingly important role in people's lives. In order to satisfy people's pursuit of display effect and personalization, the 2.5D, 3D and other curved display screens represented by Samsung have become the trend of the future development of smart devices. However, curved display screens are more likely to be scratched or broken during use than flat display screens, so they need to be protected by a film on the surface. [0003] At present, the protective film for curved display screens on the market mainly adopts the following solutions: 1) Use the traditional flat protective film to protect only the flat part of the curved display; 2) Use the method of adding a frame to the flat protective film to display...

AI Technical Summary

Problems solved by technology

However, these solutions have obvious defects: 1) The use of traditional flat protective film exposes the curved surface, which is easy to scratch and fall, and the flat protective film also affects the operating feel of the curved surface; 2) The flat film with frame The method makes the curved surface part unusable and loses the meaning of the curved display screen design; 3) Although the flat soft film can fully protect the curved display screen, with the prolongation of use time, the edge of the film is prone to warping, and the soft film The hardness of the film is relatively low, which is easy to cause scratches and scratches, affecting light transmittance and aesthetics

However, the production process of film biaxial stretching is complicated and the cost is high, and it is monopolized by a few suppliers such as Toray and 3M; 2) The blue light blocking agent is mixed into the optical coating hardening liquid, and the anti-blue light hardening liquid is coated on one side of the film and then UV cured , to form an anti-blue light hardening coating, the process is simple and easy, and the cost is low, but the blue light blocker also absorbs ultraviolet rays, which affects the UV curing of the hardening solution, and brings great benefits to the formula adjustment and multi-functionalization of the anti-blue light coating big limit

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