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Electroconductive pressure-sensitive adhesive tape

A conductive and adhesive tape technology, which is applied in the direction of conductive adhesives, film/sheet adhesives, adhesives, etc., can solve the problems of inability to exert long-term conduction reliability, increase in resistance value, and decrease in adhesive force, etc. problems, to achieve excellent adhesion, low resistance, and good workability

Inactive Publication Date: 2011-12-28
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the conventional conductive adhesive tape, especially when used in a narrow shape, can exhibit sufficient conductivity immediately after the electronic device is manufactured, but after a long period of use or in a harsh environment When used under certain conditions, the resistance value will rise slowly, and there is a problem that sufficient long-term conduction reliability cannot be exhibited.
In addition, when a large amount of filler is added to ensure long-term conduction reliability, there is also a problem that the adhesive force decreases
From this, it can be seen that the current situation is that even when used in a narrow shape, it has both high electrical conductivity and adhesive force, and can exhibit stable electrical conductivity even when used for a long time or under severe environmental conditions. conductive adhesive tape

Method used

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  • Electroconductive pressure-sensitive adhesive tape
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  • Electroconductive pressure-sensitive adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0148] Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples.

Embodiment 1

[0152] In the acrylic polymer solution A, 2 parts by weight of "Colorite L" (manufactured by Nippon Polyurethane Industry Co., Ltd., isocyanate crosslinking agent) was blended as a crosslinking agent with respect to 100 parts by weight of the acrylic polymer A. 30 parts by weight of polymerized rosin pentaerythritol ester (manufactured by Arakawa Chemical Co., Ltd., "Pencell D-125") as a tackifier resin was used to prepare an acrylic adhesive composition solution (solid content concentration: 46.8% by weight). With respect to 100 parts by weight of the solid content constituting the acrylic adhesive composition, 35 parts by weight of "Ag-HWQ-400" (manufactured by Fukuda Metal Foil Powder Industry Co., Ltd., silver filler, filler diameter d 50 : 13.2μm, filler diameter d 95 : 43.0 μm, spherical), and mixed with a mixer for 10 minutes to obtain an adhesive composition (conductive adhesive composition). That is, the content of the conductive filler was 35 parts by weight with re...

Embodiment 2

[0155] Except having changed the compounding quantity of the electroconductive filler into 70 weight part, it carried out similarly to Example 1, and obtained the electroconductive adhesive tape.

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Abstract

The present invention has an object to provide an electroconductive pressure-sensitive adhesive tape that achieves excellent tackiness and high electrical conductivity even when it is used in a finer shape (in particular, a narrow shape) and that has a small change in resistance value over time and achieves stable electrical conductivity even when it is used for a long time or in a harsh environment. The electroconductive pressure-sensitive adhesive tape of the present invention is an adhesive tape including a metal foil and a pressure-sensitive adhesive layer having an electroconductive filler on at least one side of the metal foil. The electroconductive pressure-sensitive adhesive tape has a surface exposure ratio of the electroconductive filler on a surface of the pressure-sensitive adhesive layer of 2 to 5%.

Description

technical field [0001] The present invention relates to a conductive adhesive tape. More specifically, it relates to a conductive pressure-sensitive adhesive tape for applications such as electrically conducting between two spaced apart locations. Background technique [0002] Conductive adhesive sheets or conductive adhesive tapes have electrical conductivity (conductivity) (especially electrical conductivity in the thickness direction), so they are used for electrical conduction between two parts in the middle of an electronic device, etc., electromagnetic wave shielding Use etc. As the conductive adhesive sheet or conductive adhesive tape, a conductive adhesive sheet having a metal foil and having an adhesive layer or an adhesive layer containing conductive particles on at least one surface of the metal foil is known. or a conductive adhesive tape (for example, refer to Patent Documents 1 to 4); comprising a metal foil and an adhesive layer disposed on one side of the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J9/02C09J133/00G01B15/00C09J7/28
CPCC09J7/0292C09J2201/602C09J9/02C09J7/28Y10T428/266Y10T428/2804Y10T428/263C09J2301/314
Inventor 中尾航大武藏岛康村上亚衣野中崇弘
Owner NITTO DENKO CORP
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