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ABA structure bonding piece and preparation method thereof

A technology of adhesive sheets and adhesive resins, which is applied in the direction of film/flaky adhesives, adhesives, etc., can solve the problems of ink frame height difference, etc. The method is simple and easy to achieve, solves glue overflow and collapse, and is conducive to application The effect of cutting

Active Publication Date: 2015-07-15
PANYU NANSHA YAN TIN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The primary purpose of the present invention is to solve the problems of existing adhesive sheet bonding touch screen display panel ink frame height difference absorption filling residual air bubbles and application cutting processing, and to provide a high bonding adhesion and high product qualification rate ABA Structural Adhesive Sheets

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A solvent-based acrylate copolymer adhesive resin with a glass transition temperature Tg of -40°C, an indentation Shore E-type hardness of 30, and a weight-average molecular weight Mw of 1 million is selected as the upper and lower adhesive resin A layers. Adhesive resin, and a solvent-based acrylate copolymer adhesive resin with a glass transition temperature Tg of -28°C, an indentation Shore E-type hardness of 50, and a weight-average molecular weight Mw of 700,000 is selected as the adhesive for the middle layer. The adhesive resin of the resin B layer is coated by three-layer slit co-extrusion while extruding the above-mentioned adhesive resin to form an ABA structural adhesive resin layer, and the obtained ABA structural adhesive resin layer is simultaneously extruded on a heavy-release polymer Above the ester resin layer (among them, the heavy-release polyester resin of the heavy-release polyester resin layer uses a release force of 28gf / inch, the model is YT-1008,...

Embodiment 2

[0023] Mix a solvent-free propionate prepolymer with a glass transition temperature Tg of -51°C, an indentation Shore E hardness of 26, and a weight-average molecular weight Mw of 1 million with an ultraviolet photoinitiator in a weight ratio of 1:200 The obtained solvent-free radiation-curable propionate adhesive resin is selected as the adhesive resin of the upper and lower layers of the adhesive resin A layer, and the glass transition temperature Tg is -30 ° C, and the indentation Shore E hardness is The solvent-free radiation-curable propionate adhesive resin obtained after mixing the solvent-free propionate prepolymer with the weight average molecular weight Mw of 600,000 and the ultraviolet photoinitiator at a weight ratio of 1:100 is selected as the intermediate The adhesive resin of layer B is the adhesive resin of B layer, adopts three-layer slit co-extrusion coating to extrude above-mentioned adhesive resin simultaneously to form ABA structure adhesive resin layer, th...

Embodiment 3

[0025] The glass transition temperature Tg is -70 ℃, the indentation Shore E-type hardness is 10, and the weight average molecular weight Mw is 800,000 polyurethane acrylic resin is selected as the adhesive resin of the upper and lower adhesive resin A layer, and with A solvent-based acrylate copolymer adhesive resin with a glass transition temperature Tg of 30°C, an indentation Shore E-type hardness of 80, and a weight-average molecular weight Mw of 500,000 was selected as the adhesive resin for the middle layer B layer adhesive resin , using three-layer slit co-extrusion coating to simultaneously extrude the above-mentioned adhesive resin to form an ABA structural adhesive resin layer, and simultaneously extrusion-coat the obtained ABA structural adhesive resin layer on the top of the heavy-release polyester resin layer (wherein, The heavy-release polyester resin for the heavy-release polyester resin layer uses a release force of 28gf / inch, the model is YT-1008, a heavy-relea...

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Abstract

The invention discloses an ABA structure bonding piece and a preparation method of the ABA structure bonding piece. The ABA structure bonding piece is provided with an ABA structure bonding resin layer, a light release polyester resin layer arranged on the top of the ABA structure bonding resin layer, and a heavy release polyester resin layer arranged at the bottom of the ABA structure bonding resin layer. The ABA structure bonding resin layer is formed by an upper bonding resin layer A, a lower bonding resin layer A and a middle bonding resin layer B in a coextrusion mode. The preparation method comprises the steps that first, the upper bonding resin layer A, the lower bonding resin layer A and the middle bonding resin layer B are processed through three-layer slot coextrusion to form the ABA structure bonding resin layer; second, the top of the heavy release polyester resin layer is coated with the ABA structure bonding resin layer in a synchronous squeezing mode, and after processing of baking or ultraviolet radiation curing, the light release polyester resin layer is arranged on the top of the ABA structure bonding resin layer in a compound mode, and the ABA structure bonding piece is obtained. The obtained ABA structure bonding piece overcomes the defect that an existing bonding piece is coated multiple times and compounded multiple times, the coating production efficiency of the ABA structure bonding piece is greatly improved, and the product yield of the ABA structure bonding pieces is greatly increased.

Description

technical field [0001] The invention relates to an adhesive sheet, in particular to an ABA structured adhesive sheet and a preparation method thereof. Background technique [0002] With the rapid development of the electronic display industry, various optical display products have been widely used in the field of life. Adhesive sheets, as a key material for bonding or fixing optical display products, have been widely used in touch screen display panel laminates with different structures. Usually, touch screen display panel laminates use inks of different colors to screen-print around the frame, or to form other required patterns. The thickness of the ink varies slightly according to the design of each product, and the thickness is usually above 8um. Therefore, when the touch screen display panel laminate is bonded and integrated with other display devices, an adhesive sheet is required in the middle, and when the adhesive sheet cannot fill the height difference of the prin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/00B29C47/06
Inventor 钟强锋李兆辉藤川昇伍益娟
Owner PANYU NANSHA YAN TIN CHEM