Bendable protective film for folding screen and preparation method thereof

A protective film, bending technology, applied in the direction of film/sheet release liner, film/sheet release coating, film/sheet adhesive, etc., can solve the problem of insufficient bending resistance and scratch resistance , The bending resistance performance is difficult to meet the needs of the folding screen, so as to achieve the effect of good anti-fingerprint, anti-oil pollution, improved light transmission performance, and excellent scratch resistance.

Inactive Publication Date: 2020-05-19
SUZHOU SIDIKE NEW MATERIALS SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing planar protective film has deficiencies in bending resistance, scratch resistance, etc., and it is difficult to meet the current needs
For example, patent 201910437720.7 discloses a non-crease protective film for flexible mobile phones and its preparation method, but its bending resistance is still difficult to meet the needs of folding screens

Method used

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  • Bendable protective film for folding screen and preparation method thereof
  • Bendable protective film for folding screen and preparation method thereof
  • Bendable protective film for folding screen and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0042] Wherein, the preparation method of the bendable protective film for the folding screen includes the following steps:

[0043] 1) Preparation of anti-rebound OCA optical glue: mix polyacrylate, polyisoprene, diluent, modifier, photoinitiator, crosslinking agent, and antioxidant evenly, heat to 50-120°C, and stir for 2.0 ~4 hours, vacuumize to remove air bubbles, cool to obtain anti-rebound OCA optical glue;

[0044] 2) On the surface and the bottom surface of the bendable substrate layer 2, the first flexible HC treatment layer 1 and the second flexible HC treatment layer 3 are respectively coated, and the prepared anti-bounce layer is coated on the second flexible HC treatment layer 3. OCA optical glue, after curing, an anti-rebound OCA optical glue layer 4 is obtained;

[0045] 3) drying in an oven, and pasting the release isolation layer 5 on the anti-rebound OCA optical adhesive layer 4 .

Embodiment 1

[0048] A bendable protective film for a folding screen, comprising a first flexible HC treatment layer 1 (15 μm), a bendable substrate layer 2 (25 μm), a second flexible HC treatment layer 3 (10 μm), and an anti- Rebound OCA optical adhesive layer 4 (15 μm) and release isolation layer 5 (20 μm);

[0049] Among them, the anti-rebound OCA optical glue includes the following raw materials by weight:

[0050]

[0051] The modifying agent comprises the following raw materials in parts by weight:

[0052]

[0053] The preparation method of the bendable protective film for the folding screen comprises the following steps:

[0054] 1) Preparation of anti-rebound OCA optical glue: mix polyacrylate, polyisoprene, diluent, modifier, photoinitiator, crosslinking agent, and antioxidant evenly, heat to 50-120°C, and stir for 2.0 ~4 hours, vacuumize to remove air bubbles, cool to obtain anti-rebound OCA optical glue;

[0055] 2) On the surface and the bottom surface of the bendable ...

Embodiment 2

[0058]A bendable protective film for a folding screen, comprising a first flexible HC treatment layer 1 (15 μm), a bendable substrate layer 2 (25 μm), a second flexible HC treatment layer 3 (10 μm), and an anti- Rebound OCA optical adhesive layer 4 (15 μm) and release isolation layer 5 (20 μm);

[0059] Among them, the anti-rebound OCA optical glue includes the following raw materials by weight:

[0060]

[0061] The modifying agent comprises the following raw materials in parts by weight:

[0062]

[0063] The preparation method of the bendable protective film for the folding screen is the same as that of Example 1.

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Abstract

The invention discloses a bendable protective film for a folding screen and a preparation method thereof. The protective film comprises a first flexible HC processing layer, a bendable base material layer, a second flexible HC processing layer, an anti-rebound OCA optical adhesive layer and a release isolation layer which are sequentially arranged in a stacked mode. The anti-rebound OCA optical adhesive layer is obtained by coating the surface of the second flexible HC processing layer with an anti-rebound OCA optical adhesive and then curing the anti-rebound OCA optical adhesive. The bendableprotective film for the folding screen is excellent in bending resistance, high in light transmittance, low in haze, excellent in scratch resistance and rebound resistance, excellent in bonding strength, relatively good in fingerprint resistance and oil stain resistance, small in dynamic friction coefficient, smooth in surface and relatively good in hand feeling; the bendable protective film canbe well applied to protection of flexible screens and curved screens which require bending performance and have scratch resistance and wear resistance.

Description

technical field [0001] The invention relates to the field of film materials, in particular to a bendable protective film for a folding screen and a preparation method thereof. Background technique [0002] At present, folding mobile phones are popular, and various mobile phone brands are vigorously promoting foldable screens. Folding screens are expensive and easy to be damaged, so folding screens need to be protected with bendable protective film materials. However, the existing planar protective films have deficiencies in bending resistance, scratch resistance, etc., and it is difficult to meet the current demand. For example, patent 201910437720.7 discloses a non-crease protective film for flexible mobile phones and its preparation method, but its bending resistance performance is still difficult to meet the needs of folding screens. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a bendable protective film f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/25C09J7/20C09J7/30C09J7/40C09J7/50C09J11/04C09J11/06C09J4/06C09J4/02
CPCC09J4/06C09J11/04C09J11/06C09J2203/318C09J2467/005C09J2467/006C09J2479/086C09J7/20C09J7/25C09J7/255C09J7/30C09J7/40C09J7/50
Inventor 金闯张庆杰
Owner SUZHOU SIDIKE NEW MATERIALS SCI & TECH
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