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Heat-strippable UV (ultraviolet) tape for electronic equipment

A technology for electronic equipment and tape, applied in the field of UV tape that can be peeled off by heating, can solve the problems of failure of disassembly, multiple working hours, permanent damage of display components, etc., and achieve the effect of easy operation and simple operation.

Inactive Publication Date: 2019-04-23
络派科技(深圳)有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is an obvious defect in the use of UV glue bonding, that is, the curing of UV glue is irreversible.
After the shell of the electronic device is irradiated with UV glue, although good bonding strength can be obtained, it is very difficult to disassemble and rework, and the cured UV glue cannot be softened by heating, etc.
When the screen or shell is broken, it is often necessary to use external force to pick off the broken glass bit by bit, which takes a lot of man-hours, and the forced peeling off by external force is easy to leave scratches, and in severe cases, the display parts will be damaged. Permanent damage, easy to cause disassembly failure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] UV adhesive components: 60 parts by weight of UV glue, using ND-5204MJ series UV glue from Nano photonics chemical company; 40 parts by weight of ethylene-vinyl acetate copolymer, using EVA 230 from DuPont, which contains vinyl acetate polymerized The mass percent of substance is 28%.

[0040] Preparation of UV adhesive:

[0041] Crush the ethylene-vinyl acetate copolymer into 50 meshes, add it to the UV glue, and stir at 60 degrees to completely dissolve the ethylene-vinyl acetate copolymer into the UV glue, remove the foam and keep it for 60 minutes to prepare The UV adhesive. The UV adhesive is used as the base glue for subsequent use.

[0042] To prepare UV tape:

[0043] Add 5-10 parts by weight of tackifier, 10-20 parts by weight of solvent, 2-5 parts by weight of anti-aging agent, and 5-10 parts by weight of plasticizer in the base glue, mix and stir evenly, adjust the The content of above-mentioned solvent, until obtaining the smear glue that solid content i...

Embodiment 2

[0055] UV adhesive components: 70 parts by weight of UV glue; 30 parts by weight of ethylene-vinyl acetate copolymer.

[0056] UV glue is composed of resin, monomer and photoinitiator. The resin comprises one of epoxy acrylate resin, polyurethane resin, polyacrylate resin, polyether acrylate resin, polyurethane acrylic resin or a combination thereof. The monomers include monofunctional monomers (IBOA, IBOMA, HEMA, etc.), difunctional monomers (TPGDA, HDDA, DEGDA, NPGDA, etc.), trifunctional monomers or multifunctional monomers (TMPTA, PETA, etc.); The initiator includes benzophenone. The ethylene-vinyl acetate copolymer adopts EVA 220 of DuPont Company of the United States, and the mass percentage of vinyl acetate polymer contained therein is 28%.

[0057] Preparation of UV adhesive:

[0058] Crush the ethylene-vinyl acetate copolymer into 100 meshes, add it to the UV glue, stir at 70 degrees to make the ethylene-vinyl acetate copolymer completely dissolve into the UV glue,...

Embodiment 3

[0072] UV adhesive components: 65 parts by weight of UV glue; 35 parts by weight of ethylene-vinyl acetate copolymer.

[0073] The UV glue is composed of resin, monomer and photoinitiator. The resin is 20-40 parts by weight of epoxy acrylate resin and 15-35 parts by weight of polyacrylate resin. The monomer is 10-25 parts by weight of hydroxypropyl methacrylate and 10-25 parts by weight of isobornyl acrylate; the initiator is 1-5 parts by weight of 1-hydroxycyclohexyl phenyl ketone.

[0074] The ethylene-vinyl acetate copolymer adopts EVA 150 of DuPont Company of the United States, and the mass percentage of vinyl acetate polymer contained therein is 33%.

[0075] Preparation of UV adhesive:

[0076]Crush the ethylene-vinyl acetate copolymer into 80 meshes, add it to the UV glue, and stir at 65 degrees to completely dissolve the ethylene-vinyl acetate copolymer into the UV glue, remove the foam and keep it for 100 minutes to prepare The curable ultraviolet adhesive.

[007...

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PUM

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Abstract

Disclosed is a heat-strippable UV tape for electronic equipment. The heat-strippable UV tape for the electronic equipment can be cured by ultraviolet irradiation to bond the first bonding unit and thesecond bonding unit of the electronic equipment and can strip the first bonding unit away from the second bonding unit in a heated manner. The heat-strippable UV tape for the electronic equipment comprises a middle base material, both sides of the middle base material are coated with UV adhesives, which are covered outside by release paper; the UV adhesives are composed of UV gel containing one or combination of epoxy acrylic resin, polyurethane resin, polyacrylate resin, polyether acrylate resin and polyurethane acrylic resin, and ethylene-vinyl acetate copolymer. The heat-strippable UV tapefor the electronic equipment can be cured by ultraviolet irradiation for bonding and accordingly be easy to operate and grasp; meanwhile, the entire heat-strippable UV tape for the electronic equipment can be stripped off from the surface of a bonded object within one step, almost leave no adhesive residues and achieve convenient operation.

Description

technical field [0001] The invention relates to an adhesive tape for bonding screens or shells of electronic equipment such as mobile phones, in particular to a heat-peelable UV adhesive tape for electronic equipment. Background technique [0002] Most of the screens or casings of mobile phones, tablet computers, TVs, camera equipment, portable game consoles, etc. are glued to the fuselage with adhesive tape. Narrow, so the requirements for the adhesive performance of the adhesive are more and more stringent. At the same time, in order to facilitate maintenance and rebonding of the screen, there are further requirements for the stripping operation of the glue. [0003] The screens or glass casings of some electronic devices in the prior art are bonded with UV glue. UV glue, also known as shadowless glue or ultraviolet glue, is a one-component UV visible light curing modified acrylic structural adhesive. UV is the abbreviation of Ultraviolet Rays in English, that is, ultra...

Claims

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Application Information

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IPC IPC(8): C09J7/20C09J7/30C09J163/10C09J175/04C09J133/04C09J171/00C09J175/14C09J123/08
CPCC09J7/20C09J7/30C09J133/04C09J163/10C09J171/00C09J175/04C09J175/14C09J2301/124C08L23/0853
Inventor 刘丽梅张天旭邓毅刘汶浦郑艳红赵曦野张盛楠张威
Owner 络派科技(深圳)有限公司