A hot-melt optical adhesive film suitable for automatic bonding and its preparation method

An optical glue, fully automatic technology, applied in the direction of heat-activated film/sheet, film/sheet without carrier, non-polymer organic compound adhesive, etc., can solve the uneven deformation of the film sheet and the difficulty of tearing the protective film , Weak initial adhesion of the film, etc.

Active Publication Date: 2021-04-27
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

As a new type of optical adhesive used in recent years, the main problems in the running-in process of hot-melt optical adhesive film and automatic laminating production line are: the deformation of the film sheet after cutting is not smooth, the protective film is difficult to tear, and the glue The initial viscosity of the film is weak, it is difficult to absorb, and it is easy to shift during the automatic assembly line process
Due to these common problems, the production efficiency of lamination automation is affected

Method used

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  • A hot-melt optical adhesive film suitable for automatic bonding and its preparation method
  • A hot-melt optical adhesive film suitable for automatic bonding and its preparation method
  • A hot-melt optical adhesive film suitable for automatic bonding and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] To 100g of ethylene-vinyl acetate copolymer, add 1.5g of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 4g of triallyl isocyanurate, 1g of γ-(methacryloyloxy ) Propyltrimethoxysilane, 3g 1,6-hexanediol diacrylate, 0.5g 2,6-di-tert-butyl-4-methylphenol, and then add 1g ethylene-octene copolymer, through the high-speed mixer Mix evenly, put it into a casting machine, melt it at 110°C, plasticize and extrude, laminate with PET protective film and PE protective film, and make a hot-melt optical adhesive film through stretching, pulling, and winding processes. The surface of the optical film has irregular frosted lines, and the surface static friction coefficient is 0.55.

Embodiment 2

[0032] To 100g ethylene-vinyl acetate copolymer, add 1.0g 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 5g triallyl isocyanurate, 1g γ-(methacryloyloxy ) Propyltrimethoxysilane, 2.4g 1,6-hexanediol diacrylate, 0.6g 2,6-di-tert-butyl-4-methylphenol, then add 2g ethylene-octene copolymer, and stir at high speed Machine mixed evenly, put into the casting machine, melted at 110 ℃, plasticized and extruded, laminated with PET protective film and PE protective film, stretched, drawn, and rolled to obtain a hot-melt optical adhesive film. The surface of the optical film has irregular frosted lines, and the surface static friction coefficient is 0.58.

Embodiment 3

[0034] In 100g ethylene-vinyl acetate copolymer, add 2.5g2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 4g triallyl isocyanurate, 1.2gγ-(methacryloyl Oxygen)propyltrimethoxysilane, 3g1,6-hexanediol diacrylate, 0.5g2,6-di-tert-butyl-4-methylphenol, then add 3g ethylene-octene copolymer, and stir at high speed Machine mixed evenly, put into the casting machine, melted at 110 ℃, plasticized and extruded, laminated with PET protective film and PE protective film, stretched, drawn, and rolled to obtain a hot-melt optical adhesive film. The surface of the optical film is irregular frosted texture, and the surface static friction coefficient is 0.5.

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Abstract

The invention discloses a hot-melt optical adhesive film suitable for automatic lamination and a preparation method thereof, and aims to provide a hot-melt optical adhesive film suitable for continuous lamination of a fully automatic lamination production line, which satisfies automatic lamination The production line has requirements for the dimensional stability of the optical adhesive film, the tearability of the protective film, and the adsorption of the adhesive film. Significantly improve or avoid the problem of low bonding efficiency caused by defects such as unevenness and deformation of the hot-melt optical adhesive film, difficult to tear the protective film, and easy slippage of the adhesive film during the automatic bonding process of the touch screen; its technical solutions include 110 parts of ethylene-vinyl acetate copolymer and functional additives, 1-10 parts of polyolefin; it belongs to the field of full-fit packaging of touch screens and liquid crystals.

Description

technical field [0001] The invention relates to an optical adhesive film, specifically, a hot-melt optical adhesive film suitable for automatic lamination. The invention also relates to a preparation method of the hot-melt optical adhesive film suitable for automatic lamination, belonging to touch Control screen and liquid crystal fully bonded packaging field. Background technique [0002] The market demand for touch screens is increasing, and optical glue is required to be used in the production process. The current optical adhesive market is divided into three categories: one is OCA, that is, transparent double-sided tape without substrate, which has a long history of application, but the disadvantage is that the initial adhesion is too high, the fluidity is extremely low, and it is difficult to discharge during the process. Bubbles, mainly for mobile phones or screens below 10 inches; the second type is LOCA, that is, liquid optical glue, which is liquid during processin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J4/06C09J4/02C09J11/06C09J7/35C09J7/10
CPCC09J4/06C09J11/06C09J7/10C09J7/35
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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