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A kind of 3D curved surface AF coating screen mobile phone protective film and preparation method thereof

A protective film and curved surface technology, which is applied in the field of 3D curved surface AF coated screen mobile phone protective film and its preparation, can solve the problems of low production efficiency, complex molding process, and high production cost

Active Publication Date: 2022-05-13
NINGBO HUGHSTAR ADVANCED MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing curved screen protective film is usually a multi-layer structure, but generally can only be bent and formed by high temperature heating
Therefore, in the manufacturing process of the existing curved screen protective film, it is necessary to customize bending molding molds of different specifications according to different sizes of curved screen mobile phones. process, although the size of the curved screen protective film after hot-press forming is completely matched with the curved screen mobile phone, but the molding process is complicated, so that the overall production efficiency is low and the production cost is relatively high

Method used

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  • A kind of 3D curved surface AF coating screen mobile phone protective film and preparation method thereof
  • A kind of 3D curved surface AF coating screen mobile phone protective film and preparation method thereof
  • A kind of 3D curved surface AF coating screen mobile phone protective film and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] Embodiment one: if figure 1As shown, a 3D curved surface AF coated screen mobile phone protective film, including a top protection layer 1 laminated from top to bottom, a hardening layer 2, a PET layer 3 with a polarization angle of 90°, and a modified photothermal dual-curing acrylic polyurethane Layer 4, no optical axis optical elastic layer 5, special silicone pressure-sensitive adhesive layer 6 for AF screen and fluorine release film 7, the material components of the modified photothermal dual-curing acrylic polyurethane layer 5 are: 100 parts by weight of dual-curing resin (Ding Lisen DSU-1630A), 30 parts by weight photosensitive monomer (City Blue Material CM8003), 7 parts by weight curing agent (Ding Lisen DSU-1630B), 5 parts by weight photoinitiator (2-hydroxyl-2-methyl -1-[4-(2-hydroxyethoxy) phenyl]-1-acetone), 1 part by weight of UV absorber (477), 0.5 parts by weight of UV stabilizer (292) and 20 parts by weight of the first solvent ( (Toluene and ethyl est...

Embodiment 2

[0041] Embodiment 2: This embodiment is basically the same as Embodiment 1, the only difference is that in this embodiment, the PET layer 3 with a polarization angle of 70° and the optical elastic layer 5 without an optical axis are optical-grade soft TPU elastic layers. The optical grade soft TPU elastic layer has a thickness of 20 μm and a Young’s modulus of 58.6 MPa (5% tensile strain).

Embodiment 3

[0042] Embodiment 3: This embodiment is basically the same as Embodiment 1, except that the preparation method is different. The 3D curved surface AF coated screen mobile phone protective film of this embodiment is prepared by the following method:

[0043] (1) Coating the glue used to prepare the hardened layer on the upper surface of the PET layer 3 with a thickness of 25 μm and a polarization angle of 90°, the coating thickness is 3 μm, and the glue is cured under UV curing to form a hardened layer;

[0044] (2) Coat the optical grade glue on the lower surface of the PET release film, dry the optical grade glue at 90-135°C to form an optical elastic layer without optical axis, and cure it at 40°C for 5 hours, the optical grade is hard The modulus of the TPU layer is 1500MPa (5% tensile strain), and the special silicone pressure-sensitive glue for AF screen is coated on the lower surface of the school-grade hard TPU glue, and the special silicone pressure-sensitive glue for A...

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Abstract

The invention discloses a 3D curved surface AF coating screen mobile phone protective film and a preparation method thereof, which adopts a hardened layer, a PET layer with a polarization angle of 70-100°, a modified photothermal double-cured acrylic polyurethane layer, and optical axis-free optical elasticity. Layer and special silicone pressure-sensitive adhesive layer for AF screen as the main structure, the optical elastic layer without optical axis has no polarization angle, the upper protection layer can realize self-separation function, and the modified photothermal dual-curing acrylic polyurethane layer adopts specific material components, both It can be heat-cured and light-cured; the advantage is that it is not necessary to customize bending molding molds of different specifications according to the size of different 3D curved AF coated screen mobile phones during production. It only needs to be cut and made to complete the molding. At the end, the film can be pasted only by positioning the film and UV curing and pasting with ultraviolet lamps. In the whole process, there is no need for hot pressing and high temperature operation and demoulding, the overall production efficiency is significantly improved, and the production cost is greatly reduced.

Description

technical field [0001] The invention relates to a protective film for a mobile phone with an AF coating screen, in particular to a protective film for a mobile phone with a 3D curved surface AF coating screen and a preparation method thereof. Background technique [0002] With the rapid development of smart technology, smart phones have become one of the important communication tools and entertainment tools in people's daily life, but the screen of the mobile phone is easily scratched or broken during use, in order to protect the appearance and feel of the mobile phone , A layer of protective film is often pasted on the screen of the mobile phone. Traditional protective films are usually PET single-layer films, PET+TPU structural films, self-healing films, and tempered films. [0003] With the continuous innovation of smartphone design, curved screen mobile phones have appeared on the market. In order to increase the sensory experience and hand-held feeling of mobile phone...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B25/08B32B25/20B32B27/06B32B27/08B32B27/32B32B27/36B32B27/40B32B7/06B32B7/12
CPCB32B25/20B32B25/08B32B27/32B32B27/36B32B27/40B32B27/08B32B27/06B32B7/06B32B7/12
Inventor 李妍董红星宫载胜姚维波
Owner NINGBO HUGHSTAR ADVANCED MATERIAL TECH
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