A kind of 3D curved screen hot-melt optical adhesive film and preparation method thereof

A hot-melt adhesive film and optical adhesive technology, applied in the field of optical adhesive, can solve the problems of low initial viscosity, air bubbles, displacement, etc., and achieve the effect of good initial viscosity and easy adsorption

Active Publication Date: 2021-09-07
广东隆创新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the bonding process of 3D curved screens, low initial viscosity will lead to displacement and air bubbles, which limits the application range of hot-melt optical adhesive films

Method used

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  • A kind of 3D curved screen hot-melt optical adhesive film and preparation method thereof
  • A kind of 3D curved screen hot-melt optical adhesive film and preparation method thereof
  • A kind of 3D curved screen hot-melt optical adhesive film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 45g of pentaerythritol triacrylate, 1.5g of 1-hydroxycyclohexyl phenyl ketone, 0.5g of 2,6-di-tert-butyl-4-methylphenol, 1g of toluene diisocyanate to 55g of urethane acrylate prepolymer, and mix Stir to form optical glue precoating solution;

[0033] The optical adhesive pre-coating solution is coated on a layer of release film (the release film is a commonly used release film in the art) by a coating machine, the coating thickness is 0.05mm, and UV curing is carried out to form a pressure-sensitive optical film. Glue-coated OCA;

[0034] Add 1.2g benzophenone, 4g trimethylolpropane trimethacrylate, 0.8g γ-aminopropyltrimethoxysilane, 2.5g 1,6-hexanediol diol to 100g ethylene-vinyl acetate copolymer Acrylate, 0.5g of 2,6-di-tert-butyl-4-methylphenol, mixed evenly by a high-speed mixer at 300 rpm, and fully dried at 40°C for 2 hours to form a hot-melt optical adhesive HCA premix.

[0035] Put the hot-melt optical adhesive HCA premix into the hopper of the casting ...

Embodiment 2

[0037] Add 45g of pentaerythritol triacrylate, 1.5g of 1-hydroxycyclohexyl phenyl ketone, 0.5g of 2,6-di-tert-butyl-4-methylphenol, 1g of toluene diisocyanate to 55g of urethane acrylate prepolymer, and mix Stir to form optical glue precoating solution;

[0038] The optical adhesive pre-coating solution is coated on a layer of release film through a coating machine, the coating thickness is 0.1mm, and it is cured by UV to form a pressure-sensitive optical adhesive coating OCA;

[0039] Add 1.2g benzophenone, 4g trimethylolpropane trimethacrylate, 0.8g γ-aminopropyltrimethoxysilane, 2.5g 1,6-hexanediol diol to 100g ethylene-vinyl acetate copolymer Acrylic esters, 0.5g of 2,6-di-tert-butyl-4-methylphenol, mixed evenly by a high-speed mixer at a speed of 300 rpm, and fully dried at 40°C for 2 hours to learn glue HCA premix.

[0040] Put the hot-melt optical adhesive HCA premix into the hopper of the casting machine, melt it at 110°C, plasticize and extrude it, and laminate it wi...

Embodiment 3

[0042] Add 45g of pentaerythritol triacrylate, 1.5g of 1-hydroxycyclohexyl phenyl ketone, 0.5g of 2,6-di-tert-butyl-4-methylphenol, 1g of toluene diisocyanate to 55g of urethane acrylate prepolymer, and mix Stir to form optical glue precoating solution;

[0043] The optical adhesive pre-coating solution is coated on a layer of release film by a coating machine, the coating thickness is 0.15mm, and it is cured by UV to form a pressure-sensitive optical adhesive coating OCA;

[0044] Add 1.2g benzophenone, 4g trimethylolpropane trimethacrylate, 0.8g γ-aminopropyltrimethoxysilane, 2.5g 1,6-hexanediol diol to 100g ethylene-vinyl acetate copolymer Acrylic ester, 0.5g of 2,6-di-tert-butyl-4-methylphenol, mixed evenly with a high-speed mixer at a speed of 300 rpm, and fully dried at 40°C for 2 hours to form a hot-melt optical adhesive HCA premix.

[0045] Put the hot-melt optical adhesive HCA premix into the hopper of the casting machine, melt it at 110°C, plasticize and extrude it,...

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Abstract

The invention discloses a hot-melt optical adhesive film for a 3D curved screen and a preparation method thereof, aiming to provide a hot-melt optical adhesive film suitable for bonding a 3D curved surface and its touch screen, and improve bonding efficiency and yield of a curved screen Hot-melt optical adhesive film; its technical scheme includes two layers of release film and three-layer structure core adhesive film layer; wherein the core adhesive layer consists of one layer of optical hot-melt adhesive film (HCA) and two layers of optical pressure-sensitive adhesive coating ( OCA), which belongs to the field of 3D curved surface and its touch screen bonding package.

Description

technical field [0001] The invention relates to an optical adhesive, specifically, a hot-melt optical adhesive film for a 3D curved screen. The invention also relates to a preparation method for the hot-melt optical adhesive film for a 3D curved screen, which belongs to the 3D curved surface and its touch screen stickers. Combined packaging field. Background technique [0002] Hot-melt optical adhesive film is a new type of optical adhesive widely used in recent years. It is different from traditional pressure-sensitive optical adhesive OCA and water adhesive LOCA. Explosiveness and other advantages. The initial tack of the hot melt optical adhesive film is low or no initial tack, which is conducive to its application in the alignment of flat screens. However, in the bonding process of 3D curved screens, low initial viscosity will lead to displacement and air bubbles, which limits the application range of hot-melt optical adhesive films. Therefore, there is an urgent need...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/10C09J7/35C09J7/38C09J4/02C09J4/06C09J11/06C09J175/14
CPCC09J4/06C09J11/06C09J175/14C09J7/10C09J7/35C09J7/381C09J2301/208C09J2301/302C09J2301/304
Inventor 余鹏李伟博林炎群张伟陈海龙
Owner 广东隆创新材料有限公司
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