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EMMA optical film for full fitting of electronic screen and preparation method thereof

A fully laminating, optical film technology, applied in the direction of non-polymer adhesive additives, non-polymer organic compound adhesives, adhesive additives, etc., can solve the problem of incompatibility of tackifiers or coupling agents Instable bonding, poor storage stability, etc., to achieve the effects of guaranteed bonding performance, easy filling of gaps, and low yellowing index

Inactive Publication Date: 2018-06-15
GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the base material of UV curable polyolefin optical film is polyolefin resin, which is a kind of non-polar macromolecule, and there is a phenomenon of incompatibility with polar low-molecular tackifier or coupling agent, so that the low-molecular tackifier Or the phenomenon of diffusion and migration of the coupling agent leads to problems such as poor storage stability and unstable bonding of UV-cured polyolefin optical films

Method used

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  • EMMA optical film for full fitting of electronic screen and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 0.5 parts of photoinitiator benzophenone and 1.5 parts of crosslinking agent trimethylolpropane to 100 parts by weight of ethylene-methyl methacrylate copolymer with a methyl methacrylate content of 24% and a melting point of 80 °C Trimethacrylate, 1.0 part tackifier γ-methacryloxypropyltrimethoxysilane, 0.1 part light stabilizer bis(2,2,6,6-tetramethyl-4-piperidinyl ) sebacate, 1.1 parts of plasticizer diisooctyl phthalate, 0.8 parts of antioxidant bis(2.4-di-tert-butylphenyl) pentaerythritol diphosphite, added to the high-speed mixer for premixed to obtain a premix. The obtained premix is ​​put into the hopper of the single-screw casting machine, melted and plasticized at 100°C, and the film thickness of the middle layer is obtained through extrusion, upper and lower protective film, stretching, traction, and winding processes. 0.2mm EMMA optical film.

Embodiment 2

[0026] Add 1.2 parts of photoinitiator 1-hydroxycyclohexyl phenyl ketone, 0.8 parts of cross-linked Agent triallyl cyanurate, 0.7 parts of tackifier γ-glycidyl ether propyl trimethoxysilane, 0.3 parts of light stabilizer bis (2,2,6,6-tetramethyl-4-piperidine base) sebacate, 0.2 parts of plasticizer di-isooctyl phthalate, 1.0 parts of antioxidant tris(2,4-di-tert-butylphenyl) phosphite, added to the high-speed mixer Premixing is carried out to obtain a premix. The obtained premix is ​​put into the hopper of the single-screw casting machine, melted and plasticized at 100°C, and the film thickness of the middle layer is obtained through extrusion, upper and lower protective film, stretching, traction, and winding processes. 0.2mm EMMA optical film.

Embodiment 3

[0028]Add 1.7 parts of photoinitiator benzophenone, 0.3 parts of crosslinking agent pentaerythritol triacrylate, 0.5 parts of tackifier vinyltrimethoxysilane, 0.4 parts of light stabilizer bis-2,2,6,6-tetramethylpiperidinol sebacate, 0.8 parts of plasticizer dioctyl phthalate , 0.3 parts of antioxidant tris (2, 4-di-tert-butylphenyl) phosphite, added to a high-speed mixer for pre-mixing to obtain a pre-mix. The obtained premix is ​​put into the hopper of the single-screw casting machine, melted and plasticized at 100°C, and the film thickness of the middle layer is obtained through extrusion, upper and lower protective film, stretching, traction, and winding processes. 0.2mm EMMA optical film.

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Abstract

The invention discloses an EMMA optical film for full fitting of an electronic screen and a preparation method thereof. The EMMA optical film for full fitting of the electronic screen is prepared by pre-mixing 100 parts by weight of an ethylene-methyl methacrylate copolymer (EMMA), 0.5-2.0 parts by weight of a photoinitiator, 0.3-1.5 parts by weight of a crosslinking agent, 0.3-1.2 parts by weightof a tackifier, 0.1-0.6 part by weight of an optical stabilizer, 0.1-1.1 parts by weight of a plasticizer and 0.2-1.0 part by weight of an antioxidant by a stirrer, putting the mixture into a single-screw tape-casting machine and tape-casting into the optical film according to set process parameters. The prepared EMMA optical film has the advantages of excellent bonding properties, high light transmittance, low water vapor transmittance and high weather resistance, also is in thermal plasticity before curing, easily fills segment gaps, adapts to the complex interface fitting, and can adapt torequirements of fitting of electronic screen protection layers, touch control layers and display layers with different sizes.

Description

technical field [0001] The invention belongs to the field of optical films of electronic components, and in particular relates to an EMMA optical film for full bonding of electronic screens and a preparation method thereof. Background technique [0002] With the rapid development of electronic technology, in order to meet people's demand for large-size electronic screens, large-size electronic screens continue to emerge in the electronics industry. Traditional electronic screen bonding materials include OCA optical glue and LOCA optical glue. Among them, OCA optical adhesive is a double-sided laminating tape without matrix material. It has good adhesive performance, high light transmittance, small shrinkage after curing and can be cured at room temperature or medium temperature. , especially when laminating large-size panels, there are problems such as difficulty in laminating and easy occurrence of air bubbles. LOCA optical adhesive is a UV-curable acrylate liquid optical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/10C09J4/02C09J4/06C09J11/06
CPCC09J4/06C09J7/00C09J11/06C09J2301/312
Inventor 吴建东严迎燕张艳林
Owner GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
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