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Aluminum electrolytic wound capacitor element-fixing tape and aluminum electrolytic capacitor

A technology for aluminum electrolytic capacitors and components, applied in the direction of electrolytic capacitors, solid electrolytic capacitors, capacitor electrodes, etc., can solve the problems of reduced operability, difficulty in applying small capacitors, and reduced operating speed, so as to prevent adverse phenomena and reduce taping operations resistance, preventing unnecessary enlargement of the

Inactive Publication Date: 2008-11-19
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when these elements applied to aluminum electrolytic capacitors are wound and fixed, since the base of the support base is paper, the strength is relatively insufficient. For example, paper of 50 μm or less is used as a thin adhesive tape for the support base. , it will break when it is attached to the capacitor with a winding machine. In order to avoid the break, it is necessary to reduce the operating speed (tape operability), etc., which becomes the cause of the decrease in operability.
In addition, in the case of small capacitors with a width of 5 mm or less of the component winding and fixing tape, the decrease in operability is particularly noticeable.
[0004] In addition, if the thickness of the paper is increased, for example, if it exceeds 50 μm, the strength of the tape becomes relatively strong, so it is possible to avoid a reduction in the operability of the tape, but the diameter of the capacitor after winding becomes unnecessarily large. , difficult to apply in small capacitors

Method used

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  • Aluminum electrolytic wound capacitor element-fixing tape and aluminum electrolytic capacitor

Examples

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Embodiment 1

[0056] As a supporting substrate, the density is 0.9g / cm 3 1. Single-ply kraft paper with a thickness of 20 μm (manufactured by Nippon Kokoshi Kogyo).

[0057] The adhesive layer was prepared by the following method. First, an acrylic polymer as a base polymer was prepared from a monomer mixture liquid consisting of 100 parts of n-butyl acrylate and 5 parts of acrylic acid. To 100 parts of this acrylic polymer, 2 parts of an isocyanate crosslinking agent (trade name: CORONATEL, manufactured by Nippon Polyurethane Co., Ltd.) and 500 parts of toluene as a solvent were added to prepare an acrylic adhesive solution. This acrylic adhesive solution was applied onto a support substrate and dried to form an adhesive layer so that the thickness of the adhesive layer was 20 μm.

Embodiment 2

[0059] As a support substrate, use a density of 0.95g / cm 3 , single-layer kraft paper with a thickness of 15 μm (manufactured by Japan Advanced Paper Industry) and a density of 0.75 g / cm 3 1. Two-ply kraft paper (manufactured by Nippon High Paper Industry) made of single-ply kraft paper (manufactured by Nippon High Paper Industry) with a thickness of 15 μm.

[0060] The adhesive layer was prepared by the following method. First, an acrylic polymer as a base polymer was prepared from a monomer mixed liquid consisting of 70 parts of n-butyl acrylate, 25 parts of 2-ethylhexyl acrylate, and 5 parts of acrylic acid. To 100 parts of this acrylic polymer, 2 parts of an isocyanate crosslinking agent (trade name: CORONATEL, manufactured by Nippon Polyurethane Co., Ltd.) and 500 parts of toluene as a solvent were added to prepare an acrylic adhesive solution. This acrylic adhesive solution was applied on a support substrate and dried to prepare an adhesive layer so that the thickness ...

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Abstract

The invention provides an aluminum electrolytic wound capacitor-fixing pressure-sensitive adhesive tape and an aluminum electrolytic capacitor using the same. The tape can be used for aluminum electrolytic capacitors without causing tape breakage in the tape wrapping process, without causing a reduction in taping workability and with preventing the problem of an unnecessary increase in the size of the wound capacitor. The aluminum electrolytic wound capacitor element-fixing tape includes a pressure-sensitive adhesive layer provided on one side of the supporting base material, wherein the supporting base material includes at least one layer of Manila hemp paper, Kraft paper, synthetic fiber paper, or mixed paper made of two or more thereof, the supporting base material has a density of more than 0.9 g / cm 3, and the supporting base material (1) has a thickness of 15 to 50 [mu]m.

Description

technical field [0001] The present invention relates to a tape for winding and fixing aluminum electrolytic capacitor elements comprising a support base material and an adhesive layer, and an aluminum electrolytic capacitor using the tape. Background technique [0002] Conventionally, adhesives or adhesive tapes have been used for element winding and fixing of aluminum electrolytic capacitors, and the adhesive tape system, which allows easy mechanization, etc., has become the mainstream. Among such adhesive tapes for aluminum electrolytic capacitors, end-fixing adhesive tapes for aluminum electrolytic capacitors using Manila hemp paper, kraft paper, synthetic fibers, etc. as a supporting substrate have been proposed (Patent Documents 1 and 2). [0003] However, when these elements applied to aluminum electrolytic capacitors are wound and fixed, since the base of the support base is paper, the strength is relatively insufficient. For example, paper of 50 μm or less is used as...

Claims

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Application Information

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IPC IPC(8): H01G9/02C09J7/02C09J7/21C09J7/38
CPCC09J7/045H01G9/151H01G9/08H01G9/004H01G9/06C09J2201/606C09J2433/00C09J2475/00C09J7/38C09J7/21C09J2301/302H01G9/00
Inventor 村田秋桐
Owner NITTO DENKO CORP
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