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Blue-light-proof film and preparation method thereof

An anti-blue light, film technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of falling and cracking, the edge of the film is prone to warping, and the curved display screen is lost, and achieves good flexibility and is not easy to interlayer. Separation, good recoat adhesion effect

Inactive Publication Date: 2019-04-02
安徽屹珹新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Blue-light-proof film and preparation method thereof
  • Blue-light-proof film and preparation method thereof
  • Blue-light-proof film and preparation method thereof

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preparation example Construction

[0077] The present invention also provides a method for preparing the aforementioned anti-blue light film, including:

[0078] Coating the anti-blue light coating liquid on a thermoplastic substrate, and after curing, obtain a thermoplastic substrate coated with an anti-blue light coating; the anti-blue light coating liquid has an acrylic coating liquid with an anti-blue light function;

[0079] Coating the functionalized coating liquid on the anti-blue light coating to obtain a thermoplastic substrate coated with the functional coating after curing; the functionalized coating liquid is a UV-cured acrylic coating liquid;

[0080] Hot-press forming the thermoplastic substrate coated with the functional coating to obtain an anti-blue light film;

[0081] Or coating the anti-blue light coating liquid on the thermoplastic substrate, and after curing, obtain the thermoplastic substrate coated with the anti-blue light coating, the anti-blue light coating liquid is an acrylic coating liquid w...

Embodiment 1

[0100] The anti-blue light coating is formed by the following components by weight: 60 parts of urethane acrylate (a reaction product of dipentaerythritol pentaacrylate and hexamethylene diisocyanate, with a functionality of 10) naphthalenediimides 1 part of compound, 5 parts of hydroxyethyl acrylate and 1 part of a-hydroxyketone photoinitiator.

[0101] The functional coating is formed by the following parts by mass: 50 parts of urethane acrylate oligomer (a reaction product of dipentaerythritol pentaacrylate and hexamethylene diisocyanate, with a functionality of 10), 1,6 -10 parts of hexanediol diacrylate (HDDA) and 1 part of a-hydroxyketone photoinitiator.

[0102] The substrate is a polycarbonate (PC) film with a thickness of 50 μm, a light transmittance of 95%, and a haze of 0.5%.

[0103] The anti-blue light coating and the functional coating are located on the same side of the substrate in turn. The anti-blue light film for curved display screens is prepared by the following...

Embodiment 2

[0109] The anti-blue light coating is composed of the following parts by weight: 40 parts of urethane acrylate (a reaction product of pentaerythritol triacrylate and isophorone diisocyanate, with a functionality of 6), hydroxypropyl methacrylate (HPMA) 2 parts, nematic liquid crystal compound (formula 1, n=4) 30 parts, chiral compound 2 parts (formula 2 below), a-hydroxyketone photoinitiator 0.1 part, leveling agent 1 part .

[0110]

[0111] The functional coating is composed of the following parts by weight: 50 parts of urethane acrylate (a reaction product of pentaerythritol triacrylate and isophorone diisocyanate, with a functionality of 6), dipentaerythritol hexaacrylate (DPHA) 10 parts, 10 parts of propoxytrimethylolpropane trimethylol ester (POTMPTA), 0.3 parts of a-hydroxyketone photoinitiator, 2 parts of nano silica particles, and 1 part of leveling agent.

[0112] The substrate is a polymethacrylate (PMMA) film with a thickness of 50 μm, a light transmittance of 95%, and...

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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...

Claims

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Application Information

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IPC IPC(8): C08J7/04C09D175/14C08L69/00C08L33/12C08L67/02
CPCC08J7/04C08J7/042C08J2333/12C08J2367/02C08J2369/00C09D175/14
Inventor 滕超王国伟李言
Owner 安徽屹珹新材料科技有限公司
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