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Double-sided adhesive film and manufacturing method thereof

A manufacturing method, double-sided adhesive technology, applied in the direction of adhesives, film/sheet adhesives, etc., can solve the problem of uneven appearance of stretched films

Inactive Publication Date: 2014-03-26
TOPPAN TDK LABEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the display panel is viewed through a polarizer, the stretched film often causes uneven appearance due to its birefringence.

Method used

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  • Double-sided adhesive film and manufacturing method thereof
  • Double-sided adhesive film and manufacturing method thereof
  • Double-sided adhesive film and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0087] refer to Figure 7 (a) First, as a release film to be the temporary support body TC, a 50-μm-thick PET film (manufactured by Fujimori Industries: DG2.5) provided with a silicon release layer was prepared. Silver mirror paint (manufactured by Seiko Advance Ltd.: Chrome Silver 300MR) was screen-printed on the release surface, and dried at 100° C. for 5 minutes to form a logo pattern with a film thickness of 1 μm. Black paint (made by Teikoku Ink Co., Ltd.: GLS-HF919-ink) was screen-printed thereon, dried at 100°C for 5 minutes, and the decorative layer 3 having a frame-like pattern of a black layer with a film thickness of 10 μm was laminated on the temporary support TC on (process (i)). The decorative layer 3 thus formed is provided on a portion corresponding to the outer peripheral portion of the display portion of the display panel, and the inside of the decorative layer 3 having the frame-like pattern corresponds to the display portion of the display panel.

[0088]...

Embodiment 2）

[0094] As in Example 1, a logo pattern was formed. Black paint (made by Imperial Ink: GLS-HF919-ink + strengthening agent for GSL glass = 100wt% + 0.5wt%) was screen-printed on it, dried and heat-cured at 90°C for 30 minutes, and a black layer with a film thickness of 10 μm was laminated. The decorative layer 3 is formed on a portion corresponding to the outer peripheral portion of the display portion of the display panel.

[0095] Next, isobutyl acrylate having a weight average molecular weight (Mw) of 400,000 was dissolved in ethyl acetate so as to have a solid content of 30 wt%, to prepare a coating material for an adhesive layer. Using an applicator, the paint was applied so that the film thickness of the display part was 20 μm to cover the decorative layer 3 and the temporary support TC, and dried at 100° C. for 2 minutes to form the first adhesive layer 2 .

[0096] After laminating a PET film with a silicon release layer (manufactured by Teijin DuPont: A31, thickness: ...

Embodiment 3）

[0099] In the same manner as in Example 1, an adhesive sheet with a decorative layer formed to the first adhesive layer 2 was produced. As a film with an adhesive layer, a tape (manufactured by Nitto Denko: CS6661T) in which a 25 μm thick adhesive layer (second adhesive layer 4) is formed on a 50 μm thick PET film with a silicon release layer was used , on the surface of the adhesive sheet with a decorative layer peeled off the release film (DG2.5) of the temporary support, the adhesive layer of the film with an adhesive layer is laminated closely, and a die-cutting die with a large blade is used Cut to a size of 60 mm x 120 mm to make a double-sided adhesive film.

[0100] Next, using this double-sided adhesive film, a display panel was formed by the same method as in Example 1.

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Abstract

The invention provides a double-sided adhesive film and a manufacturing method thereof, wherein a transparent substrate can be attached to easily form a display panel. Meanwhile, the generation of bubbles, wrinkles and the like is less likely to occur. The double-sided adhesive film is used for the adhesion of a plurality of transparent substrates to form a display panel. The double-sided adhesive film is characterized by comprising a releasable film, and a laminated body formed on the releasable film and provided with a first adhesive layer and a decorative layer. When the transparent substrates are attached together by means of the double-sided adhesive film to form the display panel, the decorative layer is arranged on the laminated body in such a manner that the other part of the display panel, except a display part, is covered by the decorative layer.

Description

technical field [0001] The invention relates to a double-sided adhesive film and its manufacturing method, which can be used in the manufacturing of display panels of mobile phones, digital cameras, televisions, computers and other electronic equipment. Background technique [0002] In a display panel of an electronic device or the like, a so-called decorative portion is provided on the outer periphery of a transparent display portion in consideration of concealment of internal wiring and design. The decorative portion includes light-shielding and designable patterns, signs, etc., and in conventional display panels, the decorative layer is formed by laminating a single layer or multiple layers of patterns on a transparent substrate made of plastic film or glass. The transparent substrate of the decorative layer is bonded to other transparent substrates via a double-sided tape. The decorative layer is mostly formed by screen printing. Generally, a film formed on a transpare...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00
Inventor 篠崎秀明饭隈明广
Owner TOPPAN TDK LABEL CO LTD
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