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Protective cover plate and mobile terminal

A technology for protecting cover plates and soft adhesive layers. It is used in film/sheet adhesives, coatings, telephone communications, etc., and can solve the problems of low hardness and easy scratches.

Active Publication Date: 2021-04-13
HEFEI LUCKY SCI & TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the applicant found in the actual application process that the Chinese patent CN 111171742 A has a technical problem of scratches due to the use of a flexible HC treatment layer, which has a low hardness and is prone to scratches.

Method used

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  • Protective cover plate and mobile terminal
  • Protective cover plate and mobile terminal
  • Protective cover plate and mobile terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 1. Hardened layer coating

[0050] Dissolve 49 parts by weight of organopolysilazane 1500RC [DURAZANE] and 21 parts by weight of polyurethane acrylate 6197H [Changxing Chemical; functionality 6] into 30 parts by weight of propylene glycol monomethyl ether solvent, add 0.05 parts by weight for leveling agent BYK-377 [BYK], and add 3 parts by weight of photoinitiator 184 [BASF] and 0.2 parts by weight of perfluoropolyether AF-01 [Lucky] to obtain a hardening solution for later use.

[0051] The above hardening solution was applied to one side of a polyethylene terephthalate film [Lucky; elastic modulus 5000 MPa] with a thickness of 25 μm, and after drying the formed coating at 150° C. for 2 minutes, it was irradiated with 172 nm ultraviolet rays 1min, and then irradiated with 280nm ultraviolet rays for 1min to obtain a hardened layer with a thickness of 1μm.

[0052] 2. Fitting of the protective cover

[0053] Use 100 μm OCA glue [Mitsubishi] to bond 50 μm ultra-thin gl...

Embodiment 2

[0055] 1. Hardened layer coating

[0056] Dissolve 42 parts by weight of organopolysilazane 1500SC [DURAZANE] and 28 parts by weight of polyurethane acrylate UA9050 [BASF; functionality 8] into 30 parts by weight of butanone solvent, add 0.05 parts by weight of leveling agent BYK- 307 [BYK], and add 3 parts by weight of photoinitiator 1173 [BASF] and 0.2 parts by weight of perfluoropolyether DAC-HP [Dakin in Japan] to obtain a hardening solution for future use.

[0057] The above hardening solution was applied to one side of a polyethylene terephthalate film [Lucky; elastic modulus of 5873 MPa] with a thickness of 28 μm, and after drying the formed coating at 150° C. Irradiate for 1 min, and then irradiate with 295nm ultraviolet rays for 1 min to obtain a hardened layer with a thickness of 2.5 μm.

[0058] 2. Fitting of the protective cover

[0059] Use 125 μm OCA glue [Mitsubishi] to bond 80 μm ultra-thin glass [Nippon Electric Glass] to the above-mentioned polyethylene ter...

Embodiment 3

[0061] 1. Hardened layer coating

[0062] Dissolve 35 parts by weight of organopolysilazane 1800 [DURAZANE] and 35 parts by weight of polyurethane acrylate CN9013NS [Sartomer; functionality 9] into 30 parts by weight of ethanol solvent, add 0.05 parts by weight of leveling agent TEGORad 2100 [TEGO], and add 3 parts by weight of photoinitiator TPO [BASF] and 0.2 parts by weight of perfluoropolyether CoatFilmUVF-103 [Konu new material] to obtain a hardening solution for future use.

[0063] The above hardening solution was applied to one side of a polyethylene terephthalate film [Lucky; elastic modulus of 6645 MPa] with a thickness of 36 μm, and after drying the formed coating at 150° C. for 2 minutes, it was sprayed with 172 nm ultraviolet rays Irradiate for 1 min, and then irradiate with 320nm ultraviolet rays for 1 min to obtain a hardened layer with a thickness of 4 μm.

[0064] 2. Fitting of the protective cover

[0065] Use 150μm OCA glue [Fuyin Group] to bond 125μm ultr...

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Abstract

The invention belongs to the technical field of mobile terminal protection cover plate structures, and relates to a protection cover plate and a mobile terminal. The protection cover plate comprises a first flexible glue layer, ultrathin glass, a second flexible glue layer, a polyester layer and a hardening layer which are stacked in sequence, and the thickness of the first flexible glue layer is 25-50 [mu]m; the thickness of the ultrathin glass is 50-200 microns; the thickness of the second flexible glue layer is 100-175 microns; the thickness of the polyester layer is 25-50 microns; the polyester layer is a polyethylene glycol terephthalate film with an elastic modulus of 5000-8000 MPa; the thickness of the hardening layer is 1-7 [mu]m; the hardening layer is formed by irradiating ultraviolet rays to a hardening liquid containing organic polysilazane for curing; the pure water contact angle of the hardening layer is larger than 105 degrees, and the pencil hardness ranges from 3H to 5H. The protective cover plate provided by the invention has excellent bending performance and strong surface hardness.

Description

technical field [0001] The invention belongs to the technical field of a mobile terminal protection cover structure, and relates to a protection cover and a mobile terminal. Background technique [0002] With the increasing application of OLED screens in mobile terminals, especially mobile phones, foldable mobile phones have become a research hotspot for various manufacturers. Huawei, OPPO, VIVO, and Xiaomi are all conducting in-depth research in this field. [0003] Foldable mobile phones that are currently on the market, whether they are U-shaped, wedge-shaped, or drop-shaped, will inevitably face the crease problem of the screen, even if it can be restored after a period of time. Because of its ultra-thin and bendable characteristics, surface hardness and light transmittance can meet the general requirements of smart devices, CPI (Colorless Polyimide, colorless PI film) has become the mainstream application material for folding cover panels. CPI has good bending propert...

Claims

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Application Information

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IPC IPC(8): C09J7/29C09D183/16C09D175/14C09D7/65C08J7/046C08L67/02H04M1/02
CPCC09J7/29C09D183/16C09D175/14C09D7/65C08J7/046H04M1/0283C09J2400/143C09J2467/006C08L2205/03C08J2367/02C08J2483/16C08J2475/14C08L75/14C08L71/00C08L83/16
Inventor 刘玉磊吴胜徐倩倩李恒鲍时萍
Owner HEFEI LUCKY SCI & TECH IND
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