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Hot-melting light-curing optical adhesive for laminating capacitance-type touch screen and preparation method

A capacitive touch screen and light-curing technology, applied in the direction of adhesives, adhesive types, adhesive additives, etc., can solve problems such as difficult lamination, difficult removal of air bubbles, easy flow of glue, etc., to achieve excellent shock resistance and explosion resistance Performance, maintenance stability and long-term, superior moisture resistance, heat resistance and weather resistance

Inactive Publication Date: 2018-07-27
惠州市飞世尔实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional solid-state laminating adhesive is OCA optical adhesive in the form of pressure-sensitive adhesive, mainly based on 3M Company, mainly optical acrylic adhesive without substrate, and then attaching a layer of release film on the upper and lower bottom layers, which is a kind of The double-sided laminating tape without matrix material needs to be laminated and then laminated. However, the lamination is difficult, the precision is high, it is easy to produce air bubbles, and it is difficult to rework after lamination. It is not suitable for some large-scale tapes. size or expensive product applications
[0005] On the basis of OCA optical adhesive, liquid optical adhesive LOCA is developed. LOCA is a single-component, UV-curable acrylate liquid optical adhesive, which is suitable for bonding touch screens and LCD panels, but this process also exists. Defects, easy glue flow, difficult to remove air bubbles, low production efficiency, etc. It is also not suitable for some large-sized or expensive products.

Method used

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  • Hot-melting light-curing optical adhesive for laminating capacitance-type touch screen and preparation method

Examples

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preparation example Construction

[0029]The present invention also proposes a method for preparing the above-mentioned hot-melt light-curable optical adhesive for laminating the capacitive touch screen, comprising the following steps:

[0030] Step 1: According to parts by weight, weigh 50-70 parts of main resin, 10-30 parts of auxiliary resin, 10-15 parts of tackifier, 1-5 parts of photoinitiator, and 0.5-2 parts of antioxidant.

[0031] Step 2: Mix the weighed components with an open mill to obtain a uniformly dispersed rubber mix.

[0032] Step 3: Put the compounded rubber into the laminating machine to melt and form a film to obtain a hot-melt light-curable optical adhesive product for laminating the capacitive touch screen.

Embodiment 1

[0034] Take the following components:

[0035] 50g of main resin (50g of EVA resin of Dupont 150 grade is selected);

[0036] Auxiliary resin 30g (select the 15g grade to be the acrylate modified isoprene rubber resin of Kuraray LIR-102 and the 15g grade to be the acrylate modified isoprene rubber resin of Kuraray LIR-203);

[0037] Tackifier 15g (select 10g trade mark to be the terpene resin of Pinova PiccolyteS115 and the 5g trade mark to be the polybutadiene rubber resin of Kuraray LBR-305);

[0038] Photoinitiator 3g (select 3g photoinitiator 184 for use);

[0039] Antioxidant 2g (select 2g antioxidant 1076).

[0040] Mix the weighed components with an open mill to obtain a uniformly dispersed rubber mix.

[0041] Put the mixed glue into the laminating machine, melt and form the film, and obtain the hot-melt light-curable optical adhesive product for laminating the capacitive touch screen.

Embodiment 2

[0043] Take the following components:

[0044] 65g of main resin (select 65g of Mitsui 40W EVA resin);

[0045] Auxiliary resin 23g (select 23g brand to be the acrylate modified isoprene rubber resin of Kuraray LIR-203);

[0046] Tackifier 10g (select the terpene resin of Pinova PiccolyteS115 and the polybutadiene rubber resin of Kuraray LBR-300 for use with the 5g trade mark for use);

[0047] Photoinitiator 1g (select 1g photoinitiator TPO);

[0048] Antioxidant 1g (choose 1g antioxidant CA).

[0049] Mix the weighed components with an open mill to obtain a uniformly dispersed rubber mix.

[0050] Put the mixed glue into the laminating machine, melt and form the film, and obtain the hot-melt light-curable optical adhesive product for laminating the capacitive touch screen.

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Abstract

The invention relates to hot-melting light-curing optical adhesive for laminating a capacitance-type touch screen. The hot-melting light-curing optical adhesive is prepared from the following components in parts by weight: 50 to 70 parts of main body resin, 10 to 30 parts of auxiliary resin, 10 to 15 parts of tackifier, 1 to 5 parts of light initiator, and 0.5 to 2 parts of antioxidant; the main body resin is vinyl-vinyl acetate copolymeric resin; the auxiliary resin is acrylate modified isoprene rubber resin; the tackifier is a mixture of one or two of the following substances: terpene resinand polybutadiene rubber resin; and the antioxidant is a mixture of one or more of the following substances: beta-(3,5-di-tert-butyl-4-hydroxyphenyl)N-octadecanol propionate, 1,1,3-tri(2-methyl-4-hydroxyl-5-tert-butylphenyl)butane, dilauroyl thiodipropionate and organic phosphite. The adhesive is suitable for laminating a large-sized CTP as well as fully laminating a panel computer, a computer, aliquid crystal display, an one-piece machine, a vehicle-mounted navigator and the like, and can provide a perfect visual effect for the display of the touch screen.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to a hot-melt light-curable optical adhesive for bonding capacitive touch screens and a preparation method thereof. Background technique [0002] With the rapid development of the information industry, especially with the application and explosive development of touch screen technology in electronic products such as mobile phones and notebook computers, the touch screen technology has also been rapidly developed and widely used. The bonding process of the touch screen is an important link in the production process of the touch screen, including the bonding between the sensor (sensor) and the glass cover (Coverlens) and the full bonding between the capacitive touch screen (CTP) and the liquid crystal module (LCM) All need to use the bonding process, and the accuracy and appearance of the bonding directly affect the quality and yield of the product. There are two main t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C09J115/00C09J11/08C09J11/06C09J7/30
CPCC09J123/0853C08L2205/025C08L2205/035C09J7/00C09J11/06C09J11/08C09J2423/04C08L15/00C08L45/00C08L9/00C08K5/1345
Inventor 戚仁宏
Owner 惠州市飞世尔实业有限公司
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