ptc resistor

A resistor, PTC technology, applied in the field of sheet heating elements, can solve the problems of polymer resistors 34 being inelastic, impossible to form stably, and difficult to form into a film, etc., to achieve excellent long-term durability and reliability, high Flexibility and machinability levels, the effect of increasing manufacturing yields

Inactive Publication Date: 2011-12-14
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the mass of the conductor 34 increases, the polymer resistor 34 itself becomes rigid and inelastic
Therefore, it is impossible to stably form a film of such a thin polymer resistor 34 of tens of micrometers
In addition, the film itself does not have flexibility, so there is a problem that cracks are formed during processing, making it difficult to form a film

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0142] An example of a chip heating element using the above polymer resistor will be described below. Figure 10A It is a plan view of Embodiment 1 of the sheet heating element of the present invention, Figure 10B is taken along line 10B-10B Figure 10A A cross-sectional view of a sheet-like heating element.

[0143] The sheet heating element 100 includes an insulating substrate 101 , a first wire electrode 61A, a second wire electrode 61B, and a polymer resistor 60 . The wire electrodes 61A and 61B are sometimes collectively referred to as the wire electrodes 61 . The wire electrodes 61A, 61B are arranged bilaterally symmetrically on the insulating base 101 , and are partially sewn to the insulating base 101 with wires 102 . For example, using a T-die extruder, the polymer resistor 60 is extruded into a film on an insulating base 101 to which the wire electrode 61 has been attached and welded with a laminator. together, thereby forming an electrical contact with the wire...

Embodiment 2

[0167] Figure 12A It is a plan view of the sheet heating element 120 of Embodiment 2 of the present invention, Figure 12B is along Figure 12A A cross-sectional view taken along line 12B-12B in . This structure and the structure of embodiment 1 (referring to Figure 10A , 10B ) is that the wire electrode 121 is arranged on the insulating substrate 101 as a wave-shaped wire.

[0168] like Figure 12A As shown in , the wire electrode 121 is disposed on the insulating substrate 101 as a wave wire, and is attached through the wire 102 . According to this structure, when an external force is applied to the sheet-like heating element 120, since the wire electrodes 121 are arranged in a wavy line with an allowable leeway in length, they easily respond to tension, stretching, and bending. change shape. Therefore, the corrugated wire electrode 121 has a mechanical strength superior to that of the wire electrode 61 with respect to external force.

[0169] Furthermore, in the r...

Embodiment 3

[0171] Figure 13A It is a plan view of the sheet heating element 130 of Embodiment 3 of the present invention, Figure 13B is along Figure 13A A cross-sectional view taken along line 13B-13B in . This structure and the structure of embodiment 1 (referring to Figure 10A , 10B ) is that the auxiliary wire electrodes 131 are provided between the wire electrode pairs 61 . In other words, the auxiliary wire electrode 131 is provided between the pair of wire electrodes 61, and is sewn onto the insulating base 101 by a sewing machine using a wire 132 made of polyester fiber or the like as in the case of the wire electrode 61.

[0172] exist Figure 10A In the structure shown in , the polymer resistor 60 tends to heat unevenly between the wire electrodes 61, and the resistivity of that portion increases so that the potential is concentrated there. If this state continues, the temperature of that part of the polymer resistor 60 rises more than other parts, causing a well-known...

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Abstract

A PTC resistor according to the invention comprises at least one PTC component comprising at least one resin and at least two conductive materials. The at least two conductive materials include at least two different conductive materials from each other. The at least one PTC component may comprise: a first PTC component comprising a first resin and at least one first conductive material; and a second PTC component mixed with the first PTC component and comprising a second resin and at least one second conductive material. The at least one first conductive material is at least partially different from the at least one second conductive material. One of the first resin and the second resin may include a reactive resin and a reactive resin cross-linked with the reactive resin. The PTC resistor may contain a flame retardant. The PTC resistor may include liquid-proof resin.

Description

technical field [0001] The present invention relates to a resistor having PTC characteristics, in particular, the present invention relates to a polymer resistor composition having excellent PTC characteristics and a highly reliable sheet heating element using the polymer resistor composition ). The sheet heating element is highly flexible so that it can be mounted on the surface of any shape of appliance. Background technique [0002] The PTC characteristic refers to the characteristic that the resistance increases when the temperature rises. The sheet-shaped heating element with this PTC characteristic has the temperature self-control performance of the heat it emits. Hitherto, resistors have been used in heat generating members of such chip heat generating elements. The resistor is formed from a resistor ink comprising a matrix polymer and a conductive material dispersed in a solvent. [0003] The resistor ink is printed on the base material forming the heating elemen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B3/14
CPCH05B2214/04H05B2203/006H05B3/20
Inventor 福田祐宇野克彦石井隆仁中岛启造梅田章广
Owner PANASONIC CORP
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