Protective film and preparation method thereof

A technology of protective film and protective film, which is applied in the direction of chemical instruments and methods, film/sheet adhesives, coatings, etc., and can solve the problem of low hardness of protective film

Active Publication Date: 2014-09-03
NALI OPTICAL MATERIAL DONGGUAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this results in a lower hardness of the protective film

Method used

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  • Protective film and preparation method thereof

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preparation example Construction

[0051] The preparation method of the protective film of an embodiment, comprises the steps:

[0052] Step S210 , sequentially coating one surface of the main film layer 150 to prepare the first softening layer 140 and the first hardening layer 130 .

[0053] The material of the main film layer 150 is polyethylene terephthalate (PET).

[0054] Preferably, the thickness of the main film layer 150 is 50 μm˜300 ​​μm.

[0055] Preferably, the light transmittance of the main film layer 150 is greater than 90%.

[0056] Preferably, the haze of the main film layer 150 is less than 2%.

[0057] Preferably, before the step of sequentially coating one surface of the main film layer 150 to prepare the first softening layer 140 and the first hardening layer 130 , a step of corona treatment is also included on the two opposite surfaces of the main film layer 150 . Wherein, the first softening layer 140 is disposed on one of the corona-treated surfaces. The corona-treated surface imparts...

Embodiment 1

[0089] (1) One side of the main film layer that has been treated with double-sided corona is coated with a layer of photocurable resin with an antistatic agent, dried and cured, and then coated with a second layer of photocurable resin, and then After drying and curing, the thickness of each dry film is 10 μm to obtain the first softening layer. Wherein, the material of the main film layer is PET, the thickness is 125 μm, the light transmittance is 95%, and the haze of the main film layer is 0.5%. The thickness of the first softening layer is 20 μm, and the material of the first softening layer is a mixture of polyurethane acrylate, epoxy acrylate, polyester acrylate and antistatic agent. In the first softening layer, the mass ratio of polyurethane acrylate, epoxy acrylate and polyester acrylate is 4:3:3, and the antistatic agent is diisobutylene-maleic acid disodium salt, polyethylene polyamine and polyether A mixture of esters, the mass ratio of diisobutylene-maleic acid di...

Embodiment 2

[0095] (1) One side of the main film layer that has been treated with double-sided corona is coated with a layer of photocurable resin with an antistatic agent, dried and cured, and then coated with a second layer of photocurable resin, and then After drying and curing, the thickness of each dry film is 9 μm to obtain the first softening layer. Wherein, the material of the main film layer is PET, the thickness is 100 μm, the light transmittance is 93%, and the haze of the main film layer is 0.5%. The thickness of the first softening layer is 18 μm, and the material of the first softening layer is a mixture of polyurethane acrylate, epoxy acrylate, polyester acrylate and antistatic agent. In the first softening layer, the mass ratio of polyurethane acrylate, epoxy acrylate and polyester acrylate is 3:3:4, and the antistatic agent is octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate, antistatic The mass ratio of the agent to the total mass of polyurethane acrylate, ep...

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Abstract

The invention relates to a protective film. The protective film comprises a film protecting layer, a first adhesive layer, a first hardening layer, a first softening layer, a main film layer, a second softening layer, a second hardening layer, a second adhesive layer and a peeling layer which are sequentially stacked, wherein the first hardening layer and the second hardening layer are of a mixture of urethane acrylate, epoxy acrylate and polyester acrylate which are mixed according to the mass ratio of 6:(1-3):(1-3); and the first softening layer and the second adhesive layer are of a mixture of the urethane acrylate, the epoxy acrylate, the polyester acrylate and an antistatic agent which are mixed according to the mass ratio of (3-6):(1-4):(1-4); and the main film layer is made of polyethylene glycol terephthalate. The protective film has a high hardness. In addition, the invention further provides a preparation method of the protective film.

Description

technical field [0001] The invention belongs to the field of liquid crystal display screens, in particular to a protective film and a preparation method thereof. Background technique [0002] With the rapid development of electronic technology, all kinds of electronic products are constantly being introduced, and their prices are also acceptable to consumers. Such as mobile phones, cameras and laptops, etc. are all in one hand. In order to prevent the surface of the screen of your favorite phone from being scratched or worn by hard objects and prolong its service life, pasting a protective film on the screen has become the first choice for those who love phones. [0003] An antistatic agent is usually added to the main film layer of the protective film to make the protective film have an antistatic function. However, this results in a lower hardness of the protective film. Contents of the invention [0004] In view of this, it is necessary to provide a protective film w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02B32B27/06B32B27/18C08J7/04C09D175/14C09D163/10C09D167/06
Inventor 陈克勇朱文峰杨忠芝虞礼森
Owner NALI OPTICAL MATERIAL DONGGUAN
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