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A kind of protective film and preparation method thereof

A protective film, protective film technology, applied in chemical instruments and methods, other household appliances, lamination and other directions, can solve the problems of UV glue cracking, screen protection, arc edge rebound and other problems

Active Publication Date: 2018-07-13
NALI OPTICAL MATERIAL DONGGUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the structure of the protective film on the market includes a protective film layer, a use layer and a peeling layer in turn. The conventional protective film use layer includes a UV hard glue layer, a substrate layer and an adhesive layer in turn. , because of the hardness of the UV hard glue layer, the UV glue at the corners of the arc will appear fragmentation, and the arc edge of the product will rebound after hot pressing, and cannot be shaped for a long time, which will cause the arc edge of the screen to fail better protection

Method used

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  • A kind of protective film and preparation method thereof
  • A kind of protective film and preparation method thereof
  • A kind of protective film and preparation method thereof

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preparation example Construction

[0049] The present invention also provides a kind of preparation method of protective film, comprises the following steps:

[0050] A) Coating the UV soft glue solution on one side of the substrate to be used, and curing by ultraviolet light to obtain the substrate to be compounded with the UV soft glue layer; the hardness of the UV soft glue layer is <1H;

[0051] B) coating the UV hard glue on the UV soft glue layer, and curing by ultraviolet light to obtain the UV hard glue layer;

[0052] C) coating the viscose glue solution on the other side of the base material for use, and obtaining the viscose glue layer after drying;

[0053] D) Compounding a release layer on the surface of the adhesive layer used, and compounding a protective film layer on the surface of the UV hard adhesive layer to obtain a protective film.

[0054] In the present invention, the UV soft glue is first coated on one side of the base material, and after being cured by ultraviolet light, the base mate...

Embodiment 1

[0067] Coat the UV soft glue on the 50μm optical grade PET substrate through a micro concave roller, then dry the solvent in a 100°C oven for 60s, and then pass the UV lamp, at 500mJ / cm 2 Under irradiate for 3s to make it fully cured to obtain a UV soft rubber coating with a thickness of 2 μm.

[0068] Then apply UV hard glue on the surface of the UV soft glue coating through a micro concave roller, dry the solvent in an oven at 100°C for 60s, and then pass the UV lamp, at 500mJ / cm 2 Irradiate for 3s to make it fully cured to obtain a UV hard glue coating with a thickness of 3μm

[0069] The silicone pressure-sensitive adhesive was coated on the back of the substrate with a doctor blade, and dried in an oven at 150° C. for 120 seconds to obtain an adhesive layer with a thickness of 50 μm. At this point, the used layer is obtained.

[0070] Take another PET base material with a thickness of 50 μm, apply UV soft glue on the PET base material through a micro concave roller, hea...

Embodiment 2

[0073] Coat the UV soft glue on the 100μm optical-grade PET substrate through a micro-concave roller, then dry the solvent in an oven at 80°C for 50s, and then pass the UV lamp at 400mJ / cm 2 Under irradiate for 5s to make it completely cured to obtain a UV soft rubber coating with a thickness of 3 μm.

[0074] Then apply UV hard glue on the surface of the UV soft glue coating through a micro concave roller, dry the solvent in an oven at 100°C for 80s, and then pass the UV lamp, at 600mJ / cm 2 Irradiate for 2s to make it completely cured to obtain a UV hard glue coating with a thickness of 5 μm

[0075] The silicone pressure-sensitive adhesive was coated on the back of the substrate by a doctor blade, and dried in an oven at 130° C. for 150 seconds to obtain an adhesive layer with a thickness of 50 μm. At this point, the used layer is obtained.

[0076]Take another PET base material with a thickness of 50 μm, apply UV soft glue on the PET base material through a micro concave ...

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Abstract

The invention provides a protective film, comprising: a protective film layer; a UV (ultraviolet) hard rubber layer combined to the protective film layer; an application UV soft rubber layer combined to the UV hard rubber layer; an application base layer combined to the application UV soft rubber layer; an application viscose layer combined to the application base layer; a release layer combined to the viscose layer; the hardness of the application UV soft rubber layer is <1H. By coating the bottom of the UV hard rubber layer with one UV soft rubber layer, the hardness of an application layer decreases gradually from top to bottom with overall hardness of the application layer decreased; rebound of the protective film is prevented by using memory function of the viscose layer and UV soft rubber layer that are hot-pressed, and shredding of UV face corners is effectively prevented. Experimental results show that the protective film has good hot-pressing performance and has lasting shape performance after being hot-pressed. The invention also provides a preparation method of the protective film.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a protective film and a preparation method thereof. Background technique [0002] With the development of the electronics industry, many smartphones have curved edges and screen glass for a better visual experience on the screen. With the popularity of touch screens with curved edges, there is a huge market for protective films that can be attached to curved edges. [0003] At present, the structure of the protective film on the market includes a protective film layer, a use layer and a peeling layer in turn. The conventional protective film use layer includes a UV hard glue layer, a substrate layer and an adhesive layer in turn. , because of the hardness of the UV hard glue layer, the UV glue at the corners of the arc will appear fragmentation, and the arc edge of the product will rebound after hot pressing, and cannot be shaped for a long time, which will...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B7/06B32B7/12B32B27/06B32B27/32B32B27/36B32B37/12B32B38/10B32B38/16
CPCB32B7/06B32B7/12B32B27/06B32B27/32B32B27/36B32B27/365B32B37/12B32B38/10B32B38/16B32B2307/308B32B2457/208
Inventor 朱文峰
Owner NALI OPTICAL MATERIAL DONGGUAN
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