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Novel UV cross-linked cured multi-layer optical adhesive film and application thereof

A technology of cross-linking curing and optical glue, which is applied in the direction of adhesives, adhesive types, film/sheet adhesives, etc. It can solve the problems of insufficient processing performance, high lamination requirements, and narrow application range, etc., to achieve Good spatial extensibility, avoiding glue overflow, and wide applicability

Inactive Publication Date: 2020-01-14
SHANGHAI HIUV NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing LOCA glue has better filling properties, its processing performance is not excellent enough, it is difficult to defoam, and it is prone to glue overflow
OCA optical adhesive is currently the mainstream product on the market, but its production cost is high, the bonding requirements are high, the yield rate is low, and the application range is narrow, it is only suitable for small-size screen bonding

Method used

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  • Novel UV cross-linked cured multi-layer optical adhesive film and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Adhesive film raw material by weight:

[0029] The non-adhesive layer is 90 parts of EVA (melt index is 24) resin, 10 parts of polybutene, 0.1 part of photoinitiator 1-hydroxycyclohexyl phenyl ketone, 0.2 part of antioxidant 168, and 0.1 part of light stabilizer 770 share;

[0030] Both the thickness of the first adhesive layer and the second adhesive layer are 10 μm, and the ingredients are the same, 60 parts of polyurethane acrylate, 20 parts of isooctyl acrylate, 15 parts of isobornyl methacrylate, and 4 parts of 1-hydroxycyclohexyl phenyl ketone , phenyl bis(2,4,6-trimethylbenzoyl) phosphorus oxide 1, 0.2 part of antioxidant 168, 0.1 part of light stabilizer 770;

[0031] The first release layer and the second release layer are PET films with release forces of 10 g and 30 g, respectively.

[0032] The prepared film is UV cured.

[0033] The prepared adhesive film has a light transmittance of over 90%, is easy to degas during the bonding process, and has excellent...

Embodiment 2

[0035] Adhesive film raw material by weight:

[0036] The non-adhesive layer is 80 parts of EVA (melt index 33) resin, 20 parts of polybutene, 0.5 part of benzoylformate photoinitiator, 0.1 part of antioxidant 1010, and 0.2 part of light stabilizer 571;

[0037] Both the thickness of the first adhesive layer and the second adhesive layer are 15 μm, and the ingredients are the same, 75 parts of polyolefin acrylate, 5 parts of 4-hydroxybutyl acrylate, 15 parts of isobornyl acrylate, and 5 parts of benzoylformate photoinitiator Parts, antioxidant 1010 is 0.1 part, light stabilizer 571 is 0.2 part;

[0038] The first release layer is a PET film with a thickness of 35 μm and a release force of 15 g, and the second release layer is a PE film with a thickness of 35 μm and a release force of 40 g.

[0039] The prepared film is UV cured.

[0040] The prepared adhesive film has a light transmittance of over 90%, is easy to defoam during the bonding process, and has excellent bonding p...

Embodiment 3

[0042] Adhesive film raw material by weight:

[0043] The non-adhesive layer is 80 parts of EVA (melt index 28) resin, 19 parts of polybutene, 0.1 part of 1-hydroxycyclohexyl phenyl ketone, phenyl bis(2,4,6-trimethylbenzoyl) oxidation 0.1 part of phosphorus, 0.1 part of antioxidant 1010, 0.1 part of antioxidant 168, 0.2 part of light stabilizer 571; the thickness of the first adhesive layer and the second adhesive layer are both 8 μm, the same composition, 75 parts of polyurethane acrylate , 10 parts of isobornyl methacrylate, 10 parts of lauryl acrylate, 4 parts of 1-hydroxycyclohexyl phenyl ketone, phenyl bis(2,4,6-trimethylbenzoyl) phosphorus oxide 1 part, 0.1 part of antioxidant 1010, 0.1 part of antioxidant 168, 0.2 part of light stabilizer 571;

[0044] The first release layer and the second release layer are 50 μm PET films with release forces of 12 g and 35 g, respectively.

[0045] The prepared film is UV cured.

[0046] The prepared adhesive film has a light trans...

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Abstract

The invention relates to a novel UV cross-linked cured multi-layer optical adhesive film. The novel UV cross-linked cured multi-layer optical adhesive film sequentially comprises a first release layer, a first viscous layer, a non-viscous layer, a second viscous layer and a second release layer, wherein the first viscous layer and the second viscous layer each are an acrylate adhesive layer, the non-viscous layer is an ethylene vinyl acetate copolymer layer, and the adhesive film is subjected to UV curing. The invention further provides application of the novel UV cross-linked cured multi-layer optical adhesive film. By adopting the novel UV cross-linked cured multi-layer optical adhesive film and the application thereof, after UV curing, the adhesive layer is not prone to fracturing if being bent, good spatial malleability is achieved, and the phenomena of adhesive overflowing and difficult defoaming in the LOCA optical adhesive fitting process are avoided; in the mold cutting process, wiredrawing does not exist, and adaptability to sizes of fit screens is wide; and the production cost is low, processing is easy, the solid content is 100%, energy conservation and environmental protection are achieved, in the processing and use processes, defoaming is easy, adhesive overflowing is avoided, adaptability is wide, and the fitting good product rate is increased.

Description

technical field [0001] The invention relates to the technical field of electronic display screens, in particular to an optical adhesive film, in particular to a novel UV cross-linked and cured multilayer optical adhesive film and its application. Background technique [0002] In recent years, electronic products such as mobile phones and tablets have been updated rapidly, and electronic display screens, such as touch screens and LCD screens, have also developed rapidly. The bonding method between the touch screen and its corresponding components is conventional LOCA and OCA full lamination. Although the existing LOCA glue has better filling properties, its processing performance is not excellent enough, it is difficult to defoam, and it is prone to glue overflow. OCA optical glue is currently the mainstream product on the market, but its production cost is high, the bonding requirements are high, the yield rate is low, and the application range is narrow, so it is only suit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/24C09J7/30C09J175/14C09J4/02C09J4/06C09J123/26C09J167/06C08L23/08C08L23/20
CPCC08L23/0853C09J4/06C09J123/26C09J175/14C09J2423/045C09J2423/046C09J2423/105C09J2467/005C09J7/24C09J7/30C09J2301/124C09J2301/312C08L23/20C08L75/14C08L67/06
Inventor 沈陈李民
Owner SHANGHAI HIUV NEW MATERIALS
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