Heating element and production method thereof

A manufacturing method and a heating element technology, which can be used in chemical instruments and methods, electric heating devices, heating element materials, etc., and can solve problems such as insufficient bonding strength

Inactive Publication Date: 2007-03-14
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

General conductive adhesives are formed by dispersing gold, silver, nickel, carbon, etc. as conductive particles in epoxy resin. However, if a room-temperature-curing resin is used in consideration of workability, the adhesive strength will decrease. insufficient

Method used

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  • Heating element and production method thereof
  • Heating element and production method thereof
  • Heating element and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0029] 1 is a plan view showing the structure of a heat generating body according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view of the heat generating body shown in FIG. 1 along line A-A, and FIG. 3 is a main part of the heat generating body shown in FIG. 1 Zoom in on the section view.

[0030] The substrate 1 is made of, for example, a polyethylene terephthalate film with a thickness of 188 μm. A pair of electrodes 2 are provided on the substrate 1 by printing and drying a conductive silver paste. The conductive silver paste constituting the electrode 2 is produced by dispersing silver powder as a conductivity-imparting material in a copolyester resin, and adding an appropriate amount of isocyanate as a curing agent. That is, the electrode 2 contains a resin and conductive powder dispersed therein. The electrode 2 is composed of a main electrode 2A and branch electrodes 2B branched from the main electrode 2A, and the branch electrodes 2B of the ...

Embodiment approach 2

[0068]Fig. 10 is a plan view showing a heat generating body according to Embodiment 2 of the present invention. In this embodiment, the base material 1C has the first reinforcement layer 1A and the first resin layer 1B, and the exterior material 6C has the second reinforcement layer 6A and the second resin layer 6B. The structure of the power feeding part of the electrode 2 is the same as that of the first embodiment.

[0069] Reinforcing layer 1A is a non-woven fabric interwoven with polyethylene terephthalate fibers as a polyester material and long fibers of polyethylene terephthalate as the first fiber are arranged in a specific direction. Reinforcing layer made of laminated non-woven fabrics. The long fibers have high tensile strength and can limit stretchability in the direction in which they are arranged. Also, because of its high bulk density, it does not exhibit the physical properties of a cushioning material. On the other hand, the non-woven fabric layer formed by...

Embodiment approach 3

[0091] The heating element of this embodiment has the same structure as that of FIG. 10 , but the structure of the substrate 1C and the material of the electrodes 2 are different. That is, in such a manner that the thermoplastic polyurethane-based elastomer forming the resin layer 1B is impregnated on the surface of the nonwoven fabric in which polyethylene terephthalate fibers are interwoven to form the reinforcing layer 1A, it is heated at a high temperature. The substrate 1C is formed by lamination by pressing. In addition, the reinforcing layer 1A also contains the same long fibers as in the second embodiment. In addition, the electrodes 2 are formed using a copolyester resin-based conductive paste that is more excellent in flexibility.

[0092] In Embodiment 2, if a conductive paste obtained by dispersing silver powder as a conductivity-imparting agent in a copolyester resin and adding a solvent to adjust the viscosity is used, the flexibility of the electrode 2 can be e...

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Abstract

A heating element includes a base substrate, a pair of electrodes, a resistor capable of generating heat, a conductive resin, a terminal member, a hot melt adhesion metal, a hot melt cohesion metal, and a lead wire. The pair of electrodes is provided on the base substrate, and the resistor is formed between the pair of electrodes. The conductive resin is provided on each of the electrodes, and the terminal member is provided on the conductive resin. The adhesion metal is provided on the terminal member, and the cohesion metal forms a molten phase along with the adhesion metal. An end of the lead wire is welded to the cohesion metal. The conductive resin is provided in the vicinity of the adhesion metal so as to be affected by heat of the adhesion metal.

Description

technical field [0001] The present invention relates to a heat generating body that can be used as a heat source for heating, heating, drying, etc., and a method for producing the same. Background technique [0002] A conventional heating element is disclosed in, for example, WO2004 / 001775A1. Hereinafter, its structure will be described with reference to the drawings. Fig. 18A is a partially cutaway plan view of a conventional heating element, and Fig. 18B is a sectional view of a main part of the heating element. [0003] A pair of electrodes 112 are formed by drying a silver paste (paste) on a flexible base material 111 made of a mesh and a film. Between the pair of electrodes 112, a heat generating body 113 is provided. At the end of the electrode 112, a terminal portion 114 is provided. In addition, a covering material 115 is provided to cover them. To the terminal portion 114 , a terminal member (hereinafter referred to as member) 116 such as copper foil is bonded ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/20H05B3/02H05B3/16B32B27/18H05B3/14
CPCH05B2203/006H05B3/20
Inventor 中岛启造石井隆仁安井圭子寺门诚之重冈武彦小原和幸米山充
Owner PANASONIC CORP
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