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Bendable protective film for high-flexibility curved screen and preparation method of bendable protective film

A flexible and curved screen technology, applied in the field of film materials, can solve problems such as insufficient bending resistance, scratch resistance, and insufficient bending resistance, so as to improve overall performance, improve light transmission performance, and excellent bending resistance sexual effect

Inactive Publication Date: 2020-05-22
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 2011110196112.5 discloses a flexible screen protective film and its preparation method, which has good anti-scratch and bactericidal functions, but there is still insufficient improvement in the enhancement of bending resistance

Method used

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  • Bendable protective film for high-flexibility curved screen and preparation method of bendable protective film
  • Bendable protective film for high-flexibility curved screen and preparation method of bendable protective film
  • Bendable protective film for high-flexibility curved screen and preparation method of bendable protective film

Examples

Experimental program
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Effect test

preparation example Construction

[0050] The present invention also provides a method for preparing the bendable protective film for highly flexible curved screens, including the following steps:

[0051] 1) Preparation of flexible modified PET layer 2: PET, polybutylene terephthalate, hydroxyl-terminated hyperbranched polyester, polypentylene glycol dibenzoate, calcium silicate, calcium benzoate , nano-titanium dioxide, composite modifier, and stabilizer are added into the reaction vessel, heated to 150-350° C., stirred for 1.5-4 hours, cooled and formed to obtain the flexible modified PET layer 2;

[0052] 2) The first flexible HC treatment layer 1 and the second flexible HC treatment layer 3 are respectively coated on the surface and the bottom surface of the flexible modified PET layer 2, and the adhesive layer prepared by coating on the second flexible HC treatment layer 3 4;

[0053] 3) drying in an oven, and pasting the release layer 5 on the adhesive layer 4 .

Embodiment 1

[0056] A bendable protective film for a highly flexible curved screen, comprising a first flexible HC-treated layer 1 (20 μm), a flexible modified PET layer 2 (30 μm), and a second flexible HC-treated layer 3 (15 μm) stacked in sequence , adhesive layer 4 (20 μm) and release layer 5 (20 μm);

[0057] Wherein, the raw material of flexible modified PET layer 2 comprises by weight:

[0058]

[0059]

[0060] Wherein, the raw material of compound modifier comprises by weight:

[0061]

[0062] The preparation method of the bendable protective film for the highly flexible curved screen comprises the following steps:

[0063] 1) Preparation of flexible modified PET layer 2: PET, polybutylene terephthalate, hydroxyl-terminated hyperbranched polyester, polypentylene glycol dibenzoate, calcium silicate, calcium benzoate , nano-titanium dioxide, composite modifier, and stabilizer are added to the reaction vessel, heated to 280° C., stirred for 3 hours, cooled and formed to ob...

Embodiment 2

[0067] A bendable protective film for a highly flexible curved screen, the raw materials of the flexible modified PET layer 2 include by weight:

[0068]

[0069]

[0070] The raw material of compound modifier comprises by weight:

[0071]

[0072] The preparation method is the same as in Example 1.

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Abstract

The invention discloses a bendable protective film for a high-flexibility curved screen and a preparation method of the bendable protective film. The protective film comprises a first flexible HC treatment layer, a flexible modified PET layer, a second flexible HC treatment layer, an adhesive layer and a release layer which are sequentially arranged in a stacked mode. Wherein the flexible modifiedPET layer is prepared from the following raw materials in parts by weight: 50 to 80 parts of PET, 30 to 70 parts of polybutylene terephthalate, 2-20 parts of hydroxyl-terminated hyperbranched polyester, 0.5 to 10 parts of styrene-butadiene-styrene, 0.5 to 10 parts of calcium silicate, 0.5 to 5 parts of calcium benzoate, 0.2 to 5 parts of nano titanium dioxide, 0.5-15 parts of a composite modifier, and 1-10 parts of a stabilizer. The bendable protective film has excellent bending resistance, light transmission, toughness and strength; the product provided by the invention can be well applied to protection of flexible screens and curved screens with high requirements on bending resistance.

Description

technical field [0001] The invention relates to the field of film materials, in particular to a bendable protective film for a highly flexible curved 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 2011110196112.5 discloses a flexible screen protective film and its preparation method, which has good anti-scratch and bactericidal functions, but it is not enough to improve the bending resistance. [0003] So now a more reliable solution is needed. Contents of the invention [0004] The technical problem to be solved by t...

Claims

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Application Information

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IPC IPC(8): C09J7/25C09J7/50C08L67/02C08L67/00C08L53/02C08K13/02C08K3/34C08K5/098C08K3/22C08K5/09C08K5/527C08J5/18C08J7/04
CPCC08J5/18C08J7/04C08J2367/02C08J2453/02C08J2467/00C08J2467/02C08K3/34C08K5/09C08K5/098C08K5/527C08K13/02C08K2003/2241C08K2201/011C09J2467/006C09J7/255C09J7/50
Inventor 金闯张庆杰
Owner SUZHOU SIDIKE NEW MATERIALS SCI & TECH
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