3D curved screen protective film and preparation method thereof

A technology of protective film and curved screen, which is applied in the direction of pressure-sensitive film/sheet, film/sheet release coating, film/sheet adhesive, etc. Curved surface R corner edge warping, difficult screen fit and other problems, to achieve high wear resistance and flexibility, low production cost, strong protection effect

Pending Publication Date: 2021-06-15
SHENZHEN XINFUYI INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, mobile phone protective films usually use silicone sub-sensitive adhesive or acrylic pressure-sensitive adhesive that is well bonded to mobile phones as the adhesive layer of the protective film. However, since the surface of the 3D curved screen is generally treated with anti-fingerprint treatment, the water contact angle> 110°, the surface energy is low, so that the adhesion betwee

Method used

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  • 3D curved screen protective film and preparation method thereof
  • 3D curved screen protective film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0053] Preparation 1

[0054] Modified acrylic pressure sensitive glue is prepared by:

[0055] At a temperature of 30 ° C, the acrylate function monomer, acrylate crosslinked monomer, acrylate monomer, initiator, crosslinking agent, graft mixed 5 min, then mixed with ethyl acetate, then add avionace The mixture was mixed for 10 min for 10 min, and finally the silane coupling agent was stirred for 30 min to give a modified acrylic pressure sensitive glue.

Example Embodiment

[0056] Preparation 2

[0057] Modified acrylic pressure sensitive glue is prepared by:

[0058] At a temperature of 35 ° C, an acrylate function monomer, an acrylate crosslinked monomer, an acrylate monomer, a trigger, a crosslinking agent, a leveling agent were stirred with ethyl acetate, and then added to the second Metaracetamide was stirred for 12.5 min, and finally the silane coupling agent was stirred for 35min to obtain a modified acrylic pressure sensitive glue.

Example Embodiment

[0059] Preparation Example 3

[0060] Modified acrylic pressure sensitive glue is prepared by:

[0061] At 40 ° C, the acrylate function monomer, acrylate crosslinked monomer, acrylate monomer, initiator, crosslinking agent, graft mixture mixed with ethyl acetate, and then added to the dimethyl The acetamide was stirred for 15 min, and finally the silane coupling agent was stirred for 40 min to obtain a modified acrylic pressure sensitive glue.

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Abstract

The invention relates to the field of screen protection films, and particularly discloses a 3D curved screen protection film and a preparation method thereof. The protective film comprises a hardened layer, a PET base material layer, a polyurethane resin layer and a bonding layer which are sequentially arranged from top to bottom; and the bonding layer is prepared from, by weight, an acrylate functional monomer, an acrylate cross-linking monomer, an acrylate monomer, an initiator, a cross-linking agent, a flatting agent, ethyl acetate, dimethylacetamide and a silane coupling agent. The preparation method comprises the following steps: S1, coating one surface of the PET base material layer with polyurethane acrylic resin, baking, and curing to form the hardened layer; S2, coating the other surface of the PET base material layer with the polyurethane resin, baking, and curing to form a polyurethane resin layer; and S3, coating one surface of the polyurethane resin layer with a modified acrylic pressure-sensitive adhesive, and baking and curing to form the bonding layer. The adhesive force between the protective film and the curved screen is high, the protective film can be perfectly attached to the curved screen, and the edge is not prone to warping.

Description

technical field [0001] The present application relates to the field of screen protective films, more specifically, it relates to a 3D curved screen protective film and a preparation method thereof. Background technique [0002] With the development of the electronics industry, many brands have successively developed and launched mobile phones with 3D curved screens, which has prompted smart phones to enter the era of curved screens and folding screens from straight touch screens. Since the screen has changed from a straight board to a 3D curved screen, the protective film that protects the screen of the mobile phone should also be changed into a 3D shape to fit the screen of the mobile phone. [0003] At present, mobile phone protective films usually use silicone sub-sensitive adhesive or acrylic pressure-sensitive adhesive that is well bonded to mobile phones as the adhesive layer of the protective film. However, since the surface of the 3D curved screen is generally treate...

Claims

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Application Information

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IPC IPC(8): C09J7/25C09J7/50C09J7/38C09J133/08C08J7/046C08F220/18C08F220/20C08F222/14C08F220/14C08L67/02
CPCC09J7/255C09J7/50C09J7/385C09J133/14C08J7/046C08F220/1808C08J2367/02C08J2475/14C08J2475/04C09J2467/006C09J2433/00
Inventor 蔡瑾
Owner SHENZHEN XINFUYI INDAL
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