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Organic glass protective film and preparation method thereof

A plexiglass, protective film technology, applied in pressure-sensitive film/sheet, film/sheet release liner, film/sheet release coating, etc., can solve the problem of high cost, poor crack resistance and cumbersome production procedures and other problems, to achieve the effect of low cost, short process and improved production yield

Pending Publication Date: 2018-08-17
NALI OPTICAL MATERIAL DONGGUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the hardness of the above-mentioned tempered glass protective film needs to be improved, and the degree of anti-fragmentation is relatively poor. It cannot directly wrap arc edges and curved screens. The production process is cumbersome and the cost is high.

Method used

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  • Organic glass protective film and preparation method thereof
  • Organic glass protective film and preparation method thereof
  • Organic glass protective film and preparation method thereof

Examples

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preparation example Construction

[0054] The present invention also provides a method for preparing the plexiglass protective film described in the above technical solution, comprising the following steps:

[0055] a) coating the silicone pressure-sensitive adhesive on the substrate layer, and curing for the first time to obtain a silica gel layer; and then covering the silica gel layer with a release film;

[0056] b) Coating a mixture of epoxy resin and polyetheramine on the other side of the substrate layer in step a), and curing for the second time to obtain an epoxy resin layer;

[0057] c) coating UV glue on the epoxy resin layer obtained in step b), curing for the third time to obtain a UV glue layer; finally covering the UV glue layer with a protective film layer to obtain a plexiglass protective film; VU glue is made by mixing acrylic resin and solvent with a mass ratio of 12: (5-6).

[0058] In the invention, the silicone pressure-sensitive adhesive is firstly coated on the substrate layer, and cure...

Embodiment 1

[0074] (1) Take a PET base material with a thickness of 100 μm as the base material layer, apply a 35 μm silicone pressure-sensitive adhesive with a comma scraper, dry and cure in an oven at 165° C., and obtain a silica gel layer; PET release film;

[0075] (2) On the other side of the substrate layer described in step (1), use a doctor blade to coat a mixture of epoxy resin and polyetheramine (the mass ratio of epoxy resin and polyetheramine is 3:1) with a thickness of 175 μm. Bake at 155°C for 4 minutes to obtain an epoxy resin layer;

[0076] (3) On the epoxy resin layer obtained in step (2), apply 2 μm of UV glue (mixed by acrylic resin and methyl malonate acetate with a mass ratio of 12:5.4) with dimples, first pass Dry and cure in an oven at 90°C for 1.5 minutes, and then pass UV energy to 780mj / cm 2 The UV lamp is cured, the energy of the UV lamp is 70%, and the UV adhesive layer is obtained, and the hardness reaches 4H; finally, the protective film adhesive layer (10...

Embodiment 2

[0078] (1) Take a PET substrate with a thickness of 75 μm as the substrate layer, apply a 35 μm silicone pressure-sensitive adhesive with a comma scraper, dry and cure in an oven at 165° C., and obtain a silica gel layer; then cover the silica gel layer with 50 μm PET release film;

[0079] (2) On the other side of the substrate layer in step (1), use a doctor blade to coat a mixture of 200 μm epoxy resin and polyetheramine (the mass ratio of epoxy resin and polyetheramine is 3:1), after Bake at 155°C for 5 minutes to obtain an epoxy resin layer;

[0080] (3) On the epoxy resin layer obtained in step (2), use dimples to coat 2-3 μm UV glue (mixed with acrylic resin and butanone with a mass ratio of 12:5.4), and first pass through a 90°C oven Dry and solidify for 2 minutes, and then the UV energy is 780mj / cm 2 The UV lamp is cured, the energy of the UV lamp is 85%, and the UV adhesive layer is obtained, and the hardness reaches 5H; finally, the protective film adhesive layer ...

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Abstract

The invention provides an organic glass protective film. The organic glass protective film comprises a release film, a silica gel layer, a substrate layer, an epoxy resin layer, a UV (ultraviolet) glue layer and a protective film layer, wherein the silica gel layer is compounded onto the release film; the substrate layer is compounded onto the silica gel layer; the epoxy resin layer is compoundedonto the substrate layer; the UV glue layer is compounded onto the epoxy resin layer; the protective film layer is compounded onto the UV glue layer; the UV glue layer is prepared by mixing acrylic resin and solvent according to a mass ratio of 12:(5 to 6) and curing the UV glue; the thickness of the UV glue is 2 to 4mu m. Compared with the prior art, the organic glass protective film has the advantages that the special UV glue layer is adopted, and is matched with the special layer structure, so as to enhance the integrity of the product; the hardness of the product is higher, the lyophobic and oleophobic functions are realized, the arc edge and curved screens can be automatically coated, and the anti-cracking degree is better; proofed by experiment results, the hardness of the organic glass protective film is 4 to 5H, and is obviously better than the hardness of the existing tempered glass protective film.

Description

technical field [0001] The invention relates to the technical field of optical protective films, and more specifically, relates to an organic glass protective film and a preparation method thereof. Background technique [0002] Tempered glass protective film is a new type of mobile phone protective film, which is currently a high-end product used for screen protection. As early as 2012, relevant researchers in the United States used tempered glass known as "safety glass" in the field of mobile phones, and designed a tempered glass protective film for protecting the screen. In 2013, some powerful domestic manufacturers also introduced relevant high-tech raw materials and technologies from abroad to develop their own brands of tempered glass mobile phone protective films to provide professional protection for domestic users. [0003] At present, most of the tempered glass protective films on the market are tempered glass plus a piece of AB adhesive protective film, the produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/25C09J7/38C09J7/40C09J7/50C09D163/00
CPCC09J7/25C09J7/38C09J7/405C09J7/50C09J2203/318C09J2467/005C09J2467/006C09J2463/003C09J2301/1242C09J2301/124C09J2301/302
Inventor 李林克
Owner NALI OPTICAL MATERIAL DONGGUAN