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Photocuring PET coating and preparation method thereof, and preparation method and application of PET base material

A light-curing and coating technology, which is applied in the direction of coatings, film/sheet adhesives, adhesives, etc., can solve the problems of mold restrictions, poor durability, and high thermoplasticity, so as to improve compactness and strength. The effect of strong scraping and low resilience

Pending Publication Date: 2022-03-11
GUANGZHOU EHANG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a certain error between the hot-bent tempered glass and the glass cover of the mobile phone screen, and it is impossible to achieve a perfect fit. There is a hollow phenomenon in some positions, which will lead to ineffective touch
TPU (thermoplastic polyurethane elastomer rubber) material can perfectly fit large-curved screens, but due to its poor scratch resistance, surface gravure problems occur during use, and the durability is not good, which affects customer experience
However, hot-bent PET (poly-terephthalate plastic) protective film has high thermoplasticity, so the rebound after hot-press molding is large after cooling, there is a risk of white edge warping, and it is easy to be restricted by the mold, so it is necessary to constantly adjust the mold

Method used

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  • Photocuring PET coating and preparation method thereof, and preparation method and application of PET base material
  • Photocuring PET coating and preparation method thereof, and preparation method and application of PET base material
  • Photocuring PET coating and preparation method thereof, and preparation method and application of PET base material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A light-cured PET coating, comprising the following components in parts by mass:

[0051]

[0052] As a further embodiment, the active monomer is isobornyl acrylate;

[0053] The polymethacrylate is methyl methacrylate;

[0054] The particle diameter of described nano silicon dioxide is 5nm;

[0055] The photoinitiator is preferably a photoinitiator IRGACURE184 from BASF, Germany.

[0056] The leveling aid is preferably YK-UV 3500 from BYK, Germany.

[0057] The preparation method of described light-cured PET paint, comprises the following steps:

[0058] S1: After mixing urethane and methacrylate according to the formula, heat and stir, the temperature is 115°C, the pressure is 1.1MPa, and nitrogen is poured into it for protection for 1.2h, then the pressure is released to be consistent with the indoor air pressure, and the temperature is lowered to 40 After ℃, obtain the first mixture, standby;

[0059] S2: Mix and stir silicon dioxide and an appropriate amoun...

Embodiment 2

[0063] A preparation method for light-cured PET substrate, comprising the following steps:

[0064] 1) Coating the photocurable PET coating of Example 1 on the bottom film to obtain a photocurable PET coating; the coating adopts the method of straight scraping coating, the angle of the scraper is 58°, and the thickness is 100 μm;

[0065] 2) drying the photocured PET coating, and then irradiating it with UV light, the wavelength of the UV light is 365nm, and the irradiation energy is 15MJ / cm 2 , to obtain a light-cured PET base material, and protect the roll material with an opaque aluminum foil to avoid storage and contact with ultraviolet rays; The drying temperature is 95°C, the drying temperature of the third stage is 125°C, the drying temperature of the fourth stage is 95°C, the drying temperature of the fifth stage is 85°C, and the drying time of each stage is 2 minutes.

[0066] Apply the above-mentioned light-cured PET substrate to the protective film of the curved sc...

Embodiment 3

[0080] A light-cured PET coating, comprising the following components in parts by mass:

[0081]

[0082] Further, the active monomer is isobornyl acrylate;

[0083] The polymethacrylate is ethyl methacrylate;

[0084] The particle diameter of described nano silicon dioxide is 5nm;

[0085] The photoinitiator is preferably the photoinitiator Esacure KIP 150 from IGM Company.

[0086] The leveling aid is preferably a general-purpose wetting and dispersing agent TEGO Dispers 655 from German Tego Company.

[0087] The preparation method of described light-cured PET paint, comprises the following steps:

[0088] S1: After mixing urethane and methacrylate according to the formula, heat and stir at a temperature of 110°C and a pressure of 1.1MPa, and pour nitrogen into it for protection for 1.6h, then release the pressure until it is consistent with the indoor air pressure, and cool down to 40 After ℃, obtain the first mixture, standby;

[0089] S2: Mix and stir silicon diox...

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Abstract

The invention discloses a photocuring PET coating and a preparation method thereof, and a preparation method and application of a PET base material, and relates to the field of protective films. Comprising the following components in parts by mass: 35-45 parts of polyurethane; 50 to 65 parts of polymethacrylate; 1-5 parts of nano silicon dioxide; 10 to 20 parts of an active monomer; 2-6 parts of a photoinitiator; and 0.1-1 part of a leveling agent. A coating layer obtained after the photocuring PET coating is cured is low in resilience force, high in scratch resistance and high in hardness. The photocuring PET base material is applied to a protective film of an electronic product, so that the photocuring PET base material can be tightly attached to the electronic product, especially for a curved screen part, the effects of no warping and no white edge are achieved, and the photocuring PET base material has certain surface hardness and hydrophobic and scratch-resistant performance.

Description

technical field [0001] The invention belongs to the field of protective films, and in particular relates to a light-cured PET coating and a preparation method thereof, a preparation method of a PET base material and an application thereof. Background technique [0002] With the development of the mobile phone industry, large-curved screens have become a major trend of mobile phone screens. Curved screen mobile phones will dominate for a long time in the future, so there is a lot of room for development in protective films suitable for curved mobile phones. The existing flat protective film matches the flat surface of the mobile phone with a large radian, and there will be problems such as difficulty in lamination, easy rebound and warping of white edges. [0003] At present, there are thermal bending film and TPU on the market for all-round protection of mobile phone screens with curved screens. There is a certain error between the hot-bent tempered glass and the glass cove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/06C09D4/02C09D7/61C08J7/046C08J7/04C08L67/02C09J7/29
CPCC09D4/06C09D7/61C08J7/046C08J7/0427C09J7/29C08J2367/02C08J2451/08C09J2301/122C09J2301/162C09J2467/006C09J2483/00
Inventor 李艾娟郑岳勤
Owner GUANGZHOU EHANG ELECTRONICS CO LTD
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