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Adhesive sheet and preparation method thereof

An adhesive sheet, adhesive resin technology, applied in the direction of adhesive types, ester copolymer adhesives, chemical instruments and methods, etc., can solve the problem of residual gaps or air bubbles in the frame, achieve simple manufacturing process, avoid frame Residual air bubbles, high yield effect

Active Publication Date: 2015-03-25
PANYU NANSHA YAN TIN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of residual voids or air bubbles in the frame caused by the rebound of the cooling colloid after lamination and defoaming of the existing adhesive sheet, and to provide an adhesive sheet with no residual air bubbles after lamination and high product yield

Method used

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  • Adhesive sheet and preparation method thereof
  • Adhesive sheet and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Preparation of Adhesive Layer A : 100 parts of solvent-based acrylate copolymer adhesive resin YTF-03 (weight average molecular weight of 1 million, solid content of 30%) with a Tg of -46°C and a hydroxyl value of 29 mgKOH / g and 1 part of unsaturated bond-containing acrylic acid Prepolymer and 0.04 parts of UV photoinitiator 184 are mixed uniformly to prepare coating solution;

[0041] Preparation of support layer B : 100 parts of solvent-based acrylate copolymer adhesive resin YTF-04 (weight-average molecular weight: 950,000, solid content: 35%) with a Tg of -44°C and an acid value of 14 mgKOH / g and 0.4 parts of epoxy glycidol Prepare the coating liquid after mixing and stirring the ether curing agent evenly;

[0042] Adhesive sheet preparation : Then the adhesive layer A of the upper and lower layers and the support layer B of the middle layer are coated with a three-layer slit co-extrusion die and extruded simultaneously to form an ABA structural adhesive resin...

Embodiment 2

[0045] The preparation of adhesive layer A and support layer B is the same as in Example 1;

[0046] Adhesive sheet preparation : Coating the adhesive layer A coating solution on the heavy-release polyester film layer, and volatilizing the solvent in an oven at 90°C for 3 minutes, so that the dry thickness is 35um, and then lightly release the polyester film layer; the support layer Coating solution B is coated on the heavy-release polyester film layer, and after the solvent is volatilized in an oven at 90°C for 7 minutes, the dry thickness is 100um, and then compounded with the heavy-release polyester film layer; figure 1 The multiple composite processes shown in the figure obtain the adhesive sheet;

[0047] UV radiation curing: After the above-mentioned adhesive sheet is attached to the laminate, it is placed in an autoclave for degassing. The pressure of degassing is 0.3Mpa; the temperature is 40°C; the time is 60min, and finally the laminate is cured and fixed by ultr...

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Abstract

The invention discloses an adhesive sheet and a preparation method thereof. The adhesive sheet comprises an ABA-structural adhesive resin layer, a light-release-type polyester film layer and a heavy-release-type polyester film layer, wherein the light-release-type polyester film layer is arranged on the ABA-structural adhesive resin layer and the heavy-release-type polyester film layer is arranged under the BA-structural adhesive resin layer. The adhesive sheet is characterized in that the ABA-structural adhesive resin layer comprises adhesive layers A as upper and lower layers and a support layer B as an intermediate layer, each of the adhesive layers A comprises a solvent-based polyacrylate copolymer adhesive resin, a monomer containing unsaturated bonds and a UV initiator and the support layer B comprises the solvent-based polyacrylate copolymer adhesive resin and a crosslinking curing agent. The adhesive layers and the support layer are completely made of solvent-based thermosetting materials, after the adhesive sheet and a laminate are adhered, degassed by virtue of an autoclave and the rear section is fixed and cured by UV radiation so that the problem that bubbles remain in a border caused by the cold contraction of a colloid can be completely avoided; the yield rate of the product is high, the preparation process is simple and the coating process can be specifically selected according to a device.

Description

technical field [0001] The invention relates to an adhesive sheet, in particular to an adhesive sheet based on the post-stage radiation curing process of a laminate and a preparation method thereof. Background technique [0002] With the rapid development of the electronic display industry, various electronic products have been widely used in the field of life. Adhesive sheet, as a key material for bonding or fixing optical display products, has been widely used in touch screen display panel laminates with different structures. [0003] With the continuous in-depth development of touch screen technology and the more precise division of labor in the industrial chain, OGS full lamination has become the mainstream process of touch display screens. The cutting of optical lamination sheets and the step difference of lamination ink height (<60um) The requirements for characteristics such as absorption and lamination strength have also increased accordingly, especially the prob...

Claims

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Application Information

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IPC IPC(8): C09J7/02C09J133/04C09J4/02C09J4/06B32B37/12
Inventor 钟强锋李兆辉藤川昇陈伟梅伍益娟
Owner PANYU NANSHA YAN TIN CHEM
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