JPS6089093A - Flexible thermosensitive electric wire - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a flexible thermosensitive wire used as a temperature sensor or heater for electric carpets, electric blankets, etc.

Structure of a conventional example and its problems FIG. 1 shows a flexible temperature detection wire and a flexible heater conventionally used in electric carpets, electric blankets, and the like. As shown, between the inner and outer spiral electrodes (2) and (4),
It is composed of a polymer temperature sensitive layer having thermistor characteristics or a temperature fuse layer (3).

The core yarn (1) is necessary as a core material that imparts tensile strength, and also has the effect of improving the bending strength of the electrode wire. Particularly in the case of heaters for high wattage applications such as electric carpets, it is necessary to lower the heater resistance, which requires using copper wire with the highest conductivity and increasing the wire diameter.

(5) is the outer covering. For this reason, the heater easily breaks during the bending test, which means that the bending strength is weak.
This had the disadvantage of causing a decline in product performance.

OBJECTS OF THE INVENTION The object of the present invention is to eliminate the conventional drawbacks, reduce the number of manufacturing steps, reduce the material cost, and provide a flexible thermosensitive wire with good productivity.

Structure of the Invention The present invention involves forming metal conductor wires A and B having a heat-sensitive coating layer on a conductive core yarn in a spiral shape, making the conductive core yarn a metal strand, or forming a metal conductor wire on a fiber such as polyester. The conductor wire is formed in a spiral shape, the heat-sensitive coating layer of the metal conductor wire A is made of a polymer thermosensitive material that reduces impedance with respect to temperature rise, and the heat-sensitive coating layer of the metal conductor wire B is made of a crystalline polymer. A flexible thermosensitive electric wire with an integrated sensor heater can be constructed by using the metal conductor wire A as a heat generating wire and having the polymer temperature sensitive body as a heat sensitive coating layer.

DESCRIPTION OF EMBODIMENTS FIG. 2 is a partially cutaway side view of the basic structure of the flexible thermosensitive electric wire of the present invention, and FIG. 3 is a partially cutaway side view of the flexible thermosensitive electric wire of the present invention.

The same symbols as in FIG. 1 indicate the same parts. In the figure, Oa indicates a heat-sensitive coating layer, and Oa indicates a heating wire. (A) constitutes a heater wire with a metal conductor wire.

In the present invention, the conductive core yarn (1) may be a metal strand, but is constructed by winding a metal conductor wire in a spiral shape around a core yarn made of polyester, aromatic polyamide, nylon, glass fiber, or the like. When used in a high-capacity heating device, the heating wire needs to be a thick metal conductor wire with low resistance, so in this case, it is preferable to use a metal conductor wire having a heat-sensitive coating layer as the heating layer.

The heat-sensitive coating layer 03 used in the present invention has the following properties:
A polymer temperature sensitive layer that reduces impedance, a temperature fuse layer made of a crystalline polymer that melts and shorts between electrodes when the temperature rises abnormally, or a PTO that has a positive temperature coefficient of resistance.
There are resistor layers, etc.

A flexible thermosensitive electric wire with an integrated sensor heater can be constructed by arranging a wire having a polymer temperature sensitive layer and a wire having a temperature fuse layer in a spiral shape on a conductive wire core yarn.

An embodiment of the heating line of the present invention having the configuration shown in FIG. 2 will be described.

017ψ on 2000 denier aromatic polyamide core thread
Foil-made copper wire (2
) and 0.111O of nylon 12 on pure copper wire of 028ψ
Heat-sensitive coating layer 0 coated with I+ thickness: Metal conductor wire 04 with i
The metal conductor wires A each consist of a pitch of 0.711.
1II+ and 18# were simultaneously wound using a winding machine. This was coated with soft polyvinyl chloride (5) to a thickness of 0411II++ to form a flexible thermosensitive electric wire (hereinafter referred to as heating wire) shown in FIG.

An embodiment of the present invention in which the temperature detection line has the configuration shown in FIG. 2 will be described.

2000 denier polyester core yarn (1) with a width of 0.
Pinch 3an, 0.05mm thick stainless steel foil 07
It was wrapped around five layers to form a conductive core thread. Next, attach the ion conductive polymer temperature sensor to the 0.15ψ- stainless steel wire 04.
．． A metal conductor wire B coated with a thickness of 1 mm is constructed, and this is spirally coated on the conductive wire core yarn at a pitch of 1,4 + m.
Wrapped with n. After wrapping a polyester film with a thickness of 16 μm, a soft polyvinyl chloride composition (5) was applied at 0.5 μm.
4. Thick tubing.

In the present invention, two heat generating wires each having a length of 4077L are prepared as a two-bone carpet, and this and the temperature detection wire 4 are prepared.
0yx was arranged and fixed to the carpet body with an adhesive to form an electric carpet body.

This heating wire had a resistance value of 0.58 Ω/m. The bending strength as a flexible heater was 5900 times at ±90° bending with a load of 5002 in SSO++.

Humidity sensing wires were placed into the carpet as described above. This flexible thermosensitive wire has an impedance approximately three times higher than that of the structure shown in Figure 1, and has a thermistor B constant (3
0-60°C) showed 8500°K.

An example of a flexible temperature detection line that integrates a heat generation line and a temperature detection line will be described.

2000 denier aromatic polyamide core yarn (width 0 on top of 11
．． Three groups of stainless steel foil (2) with a thickness of 0.05 m+++ were wound at a pitch of 0.75 rmn to form a conductive core yarn.

Next, a nylon 12 heat-sensitive coating layer with the same specifications as those used for the heating wire and the temperature detection wire (1 metal conductor wire with 1 moat and 1 stainless steel wire (7) with ion conductive polymer temperature sensor (6))
was wound on the conductive core yarn as shown in FIG.

Next, nylon 12 was added as a migration prevention layer (8).
A flexible thermosensitive wire was constructed by coextruding a polyvinyl chloride composition as an insulating jacket (5). This flexible heat-sensitive electric wire was wired for 80 m inside the electric carpet with adhesive to form a -wire type electric carpet body. It is an electrode wire (2), (
Temperature was detected by the impedance change between 7) and 04) was converged in the circuit as a heater wire. Metal conductor wire (2), (
The nylon layer between 141 and 141 acts as a temperature fuse layer in the event of an abnormal temperature rise, and is continuous with an element that shuts off the main power circuit. When temperature was set using this carpet, the impedance was approximately the same as that of a conventional carpet with two temperature detection wires and a heater wired as shown in FIG.

This is because this heat-sensitive wire is a single-wire wire with a built-in heater, so the temperature of the temperature-sensitive layer is high, but as shown in the temperature detection wire above, the impedance-temperature characteristic is higher than that of the conventional structure. This is because they offset each other.

Effects of the Invention According to the configuration of the present invention, by forming the flexible heat-sensitive wire in the shape shown in FIGS. 2 and 3, a heat-sensitive coating layer is formed on the metal conductor wire in advance, so that (1) It has the advantages of increasing the tubing speed in the coating process, (2) reducing the material cost of the coating layer, and (3) eliminating the need for metal wire foil production, and allows simultaneous winding to be applied in the winding process as well. (4) Since the spirally wound metal conductor wire has a coating layer closely attached to it, it has a reinforcing effect and has a high bending strength. This produces effects such as increasing.

According to the above structure, a type in which the metal conductor wire having a heat-sensitive coating layer is formed on the core yarn and the conductor wire is wound spirally on top of the core thread can also be considered, but the type shown in FIG. has many structural advantages.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of a conventional flexible thermosensitive electric wire, FIG. 2 is a partially cutaway side view of the basic structure of the flexible thermosensitive electric wire of the present invention, and FIG. 3 is a partially cutaway side view of a flexible thermosensitive electric wire of the present invention. A partially cutaway side view of an embodiment of a thermosensitive electric wire is shown. 1: Core thread 2, 4, 7: Metal conductor wire 3: Heat-sensitive coating layer
5: Outer cover 6: Polymer thermosensitive layer 8: Migration prevention layer Patent applicant: Matsushita Electric Industrial Co., Ltd. Representative Patent Attorney Isao Abe Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. Metal conductor wire A having a heat-sensitive coating layer on a conductive core yarn,
A flexible thermosensitive electric wire characterized in that B is formed into a spiral shape. 2. The flexible material according to claim 1, wherein the conductive core yarn is a metal conductor wire spirally formed on a fiber selected from polyester, aromatic polyamide, nylon, and glass fiber. Sexual heat sensitive wire. 3. The flexible thermosensitive electric wire according to claim 1, wherein the conductive core yarn is a metal stranded wire. 4. The heat-sensitive coating layer of the metal conductor wire A is made of a polymer thermosensitive material that reduces impedance with respect to temperature rise, the heat-sensitive coating layer of the metal conductor wire B is made of a temperature fuse layer made of a crystalline polymer, and the The flexible thermosensitive electric wire according to claim 1, 2, or 3, characterized in that the metal conductor wire B is a heating wire.