JPH0458403A - Conductor - Google Patents

Abstract

PURPOSE:To reduce cost per unit length as well as to increase the tensile strength, to decrease the weight and to reduce the diameter of a conductor by coating the surface of core materials of electrically non-conductive fibers having low specific gravity, high strength and high elasticity with metallic film having electrically high conductivity. CONSTITUTION:A conductor 1 is constituted in such a way that the surface of core materials 2 created by twisting a plurality of electrically non-conductive fibers 3 having low specific gravity, high strength and high elasticity is coated with an electrically conductive substrate plating layer 4 and a copper film 5 having approximately a plating thickness of 85mum by means of a plating device. Inorganic hollow glass fibers, ceramic alumina lint, tyranno lint or organic-paraffin-related total aromatic polyamide fibers are used for electrically non-conductive fibers 3. In this way, fibers having the low specific gravity, high strength and high elasticity are used as core materials so that an increase in tensile strength, weight reduction and diameter reduction can be realized. An obtained conductor has greater utility for an electrically conductive part of an electric power transmission aerial cable or a voice coil conductor.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to winding wires for electrical machines, power transmission lines, and power distribution lines.

It relates to conducting wires used as indoor electric wires or power supply lines for various devices.

[Conventional technology]

Conventional conductors include bare copper wire and tin-plated copper wire.

Nickel-plated copper wire, aluminum wire, etc. are known, and copper wire has excellent conductivity, and plated copper wire prevents oxidation of the copper wire, and at the same time, soldering improves performance.
Aluminum wire has characteristics such as being extremely lightweight.

[Problem to be solved by the invention]

However, when these conductive wires are used as power transmission lines or power feed lines for various devices that require mechanical strength, they have the disadvantage that they lack tensile strength and are susceptible to wire breakage.

There is also cored copper wire that increases tensile strength by interposing a core in the copper wire, but it is heavy due to its high specific gravity, and it is necessary to make the core to a certain thickness in order to obtain sufficient tensile strength. Therefore, there was a problem in that there was a limit to how thin the conducting wire could be made.

For this reason, the present applicant proposed a conductor wire with a core made of light, strong, and conductive carbon fiber and coated with a metal film on the surface (Japanese Patent Application No. 18197), but the conductor wire was made of expensive carbon fiber. Since fibers are used, the cost per unit length is relatively high, making it unsuitable for power transmission lines and the like that are laid over long distances.

In addition, in order to meet the various conditions required for conductors,
Stronger and lighter than conductor wire with carbon fiber core material
It was hoped that a new conductor would be developed.

Therefore, an object of the present invention is to increase the tensile strength of a conducting wire, reduce its weight and diameter, and reduce the cost per unit length.

[Means to solve the problem]

In order to solve this problem, the present invention provides low specific gravity, high strength,
It is characterized by having a core material made of highly elastic non-conductive fibers coated with a highly conductive metal film.

[Effect]

Since the conducting wire of the present invention uses a fiber with low specific gravity, high strength, and high elasticity as a core material, it has strong tensile strength and can be made lighter and smaller in diameter.

In particular, if inexpensive ceramic or hollow glass fibers are used as fibers with low specific gravity, high strength, and high elasticity, it is possible to make a very light conductor and reduce the cost per unit length. can.

Furthermore, if para-based wholly aromatic polyamide fibers are used, the tensile strength can be dramatically increased, and the weight can also be significantly reduced.

These low specific gravity, high strength, and high elastic fibers are all non-conductive due to their physical properties, but by coating their surfaces with a highly conductive metal film, they can be made to have good conductivity. It can be a conductor.

Furthermore, by twisting a plurality of these conductive wires together, the tensile strength can be further increased.

〔Example〕

Embodiments of the present invention will be specifically described below based on the drawings.

FIG. 1 is a sectional view showing an example of the conductive wire according to the present invention, and FIG.
The figure and FIG. 3 are a front view and a plan view of the Menki apparatus for manufacturing the conducting wire.

The conducting wire 1 shown in FIG.
A conductive base plating layer 4 and a copper film 5 having a plating thickness of about 85 μm are coated by the plating apparatus shown in FIGS. 2 and 3.

The non-conductive fibers 3 include inorganic hollow glass fibers (
Single fiber diameter: 20ttm, number of tili fibers: 250.

Tensile strength: 350kgf/mrd, density:
2.54g/cj) and 1. Ceramic alumina long fibers (single fiber diameter: 3pm, number of fibers: 1500, tensile strength: 100kgf/mm, density: 3.4
g / cl), tyranno long fibers, or organic rose-based fully aromatic polyamide fibers (single fiber diameter: 10 μm, number of fibers: 2,500, tensile strength: 369 kgf / m rd
, density: 1.44 g/cd), etc. are used.

The plating device shown in FIGS. 2 and 3 is composed of an electroless plating device A at the front stage and an electroplating device B at the rear stage.

The electroless plating device A includes a pretreatment tank 6 that activates the surface of the core material 2 unwound from a feeding device such as a recoiler by immersing it in a 5% sulfuric acid aqueous solution, and a pretreatment tank 6 that removes the pretreatment liquid from the core material 2. A pre-treatment washing tank 7 is used to prepare catalyst nuclei (Pd.

a catalyst-imparting treatment tank 8 that forms a substance (Ag, Au, etc.) on the core material 2; an electroless plating tank 9 that performs electroless plating of copper;
It is comprised of a plating solution washing tank 10 that washes with water the surface of the core material 2 that has been plated by the electroless plating tank 9, and a drying device 11 that dries and removes the washing water.

A guide roller 12 for conveying various types and core material 2.
12- and its rotating shafts 13 and 13- are both molded from corrosion-resistant resin.

On the other hand, the electroplating device B includes a pre-treatment washing tank 14 for cleaning the surface of the core material 2 on which the base plating layer 4 has been formed by the electroless plating device A, and a pretreatment water washing tank 14 for cleaning the surface of the core material 2 on which the base plating layer 4 has been formed by the electroless plating device A, and a copper sulfate solution for cleaning the surface of the core material 2. an electroplating tank 15 that is immersed in a copper plating bath to form a copper film 5 on its surface; and a post-treatment washing tank 16 that washes the surface of the copper film 5 formed by electroplating.
and a drying device 17 for drying and removing the washing water.

The electroplating tank 15 has conductor rollers 18a and 1 for cathode electrodes made of copper, which supply power by contacting the core material 2 which has been given conductivity by base plating, on the entry side and the exit side of the electroplating tank 15.
8b, and guide rollers 19a and 19b are provided for immersing the core material 2 conveyed across the conductor rollers 18a and 18b in the bath of the electroplating tank 15.

The guide rollers 19a, 19b, their rotating shafts 20, 20, and the electroplating tank 15, which are immersed in the plating bath, are all molded from a corrosion-resistant resin.

Further, inside the electroplating tank 15, a guide roller 19a,
On both sides of the core material 2 passing between 19b,
A pair of anode electrodes 22.22 formed of phosphorous copper plates
is provided.

Therefore, in the electroless plating device A, on the surface of the core material 2,
A chemical etching treatment that increases the adhesion of the plating film and imparts hydrophilicity is carried out in the pretreatment tank 6, and then catalyst nuclei (Pd, Ag,
The catalyst application treatment to form U, etc.) is carried out in the catalyst application treatment tank 8.
It will be held in

The catalyst-applied core material 2 is then immersed in a 50° C. plating bath containing copper ions and a reducing agent in an electroless plating tank 9, and copper is deposited on the surface of the core material 2, forming a base plating layer 4. is formed.

This base plating layer 4 makes the core material 2 made of non-conductive fibers 3 conductive, and then it is transported to the electroplating equipment ff1B.

In the electroplating tank 15 of the electroplating device B,
Ion dissociation (CuSO4
--Cu + So4) occurs, and when a direct current electric field is applied to this solution via the core material 2, which becomes the cathode electrode, and the anode electrode 2222, ionic conduction occurs, and the copper ions Cu2'' are transferred to the electrode of the core material 2. Close to the interface, metal copper is deposited on the surface of the core material 2 by a partial cathode reaction,
A copper coating 5 with high conductivity is formed.

In addition, these 7 electrical machines are shown in attached Table 1. and Table 2,
hollow glass fibers, according to the bath composition and working conditions shown in
When applied to the core material 2 made of alumina long fibers or loose wholly aromatic polyamide fibers, the results are shown in Appendix Table 3. A conductive wire 1 having the characteristics shown in was obtained.

As is clear from this result, the conducting wire l according to the present invention is
If you compare it with electrical annealed copper wire which has the same outer diameter,
Although there is a drawback that the conductivity decreases, the tensile strength increases by about 2 to 5 times, and the weight can be reduced by about 40%.

In addition, compared to conducting wires with a core material of carbon fiber, hollow glass fibers, alumina long fibers, and rose-based wholly aromatic polyamide fibers are superior in terms of lightness, and hollow glass fibers are superior in terms of tensile strength. Fibers and loose wholly aromatic polyamide fibers have achieved an increase of about 60%.

Furthermore, in terms of conductivity, although the conductive wire 1 according to the present invention uses non-conductive fibers, it achieves a conductivity of 58%, which is comparable to conductive wires using conductive carbon fibers.

Furthermore, by using inexpensive hollow glass fibers or alumina long fibers, it is possible to significantly reduce the cost per unit length.

Note that if a core material 2 made by twisting a plurality of non-conductive fibers 3.3- is used, some unevenness will occur on the surface of the conducting wire 1, and the smoothness of the surface will be slightly impaired. When subjected to mild cold working with a wire drawing die, the tensile strength and
It is possible to eliminate irregularities and smooth the surface without significantly changing characteristics such as electrical conductivity, and at the same time, the gloss of the copper coating 5 on the surface is also improved.

Further, the present invention is not limited to coating the surface of the core material 2 made of a plurality of non-conductive fibers 3.3 with the metal coating 5; The surface may be coated with a metal film 5, or
The conducting wire 1 may be formed by twisting a plurality of conductors coated with the metal film 5 in this manner.

The non-conductive fibers 3 are not limited to hollow glass fiber alumina long fibers, rose-based wholly aromatic polyamide fibers, but also meta-aromatic polyamide fibers, tyranno long fibers, long fibers made by twisting whiskers, etc. Alternatively, ordinary glass fiber or the like may be used.

Further, the plating bath used for electroplating is not limited to a copper sulfate bath, but may also be a copper sulfate bath, a copper cyanide bath, a copper birophosphate bath having an excellent leveling effect, or the like.

Furthermore, the present invention is not limited to forming a metal coating by electroplating after base plating by electroless plating as shown in the examples, but also by setting a long metal deposition time only by electroless plating. Alternatively, a metal coating having a sufficient thickness may be formed.

In this case, the electroplating process that requires an external power source can be omitted.

Further, the conducting wire according to the present invention includes a conducting wire 1 in which the surface of the core material 2 is coated with a metal coating 5 such as a copper coating, and the outer periphery of the conducting wire 1 is coated with an insulating coating made of vinyl chloride resin or the like.

〔Effect of the invention〕

As described above, the grooved wire according to the present invention uses fibers with low specific gravity, high strength, and high elasticity as its core material, so it has strong tensile strength and can be made lighter and smaller in diameter. There is an excellent effect that can be done.

In particular, when using cheap inorganic hollow glass fibers or ceramic fibers as fibers with low specific gravity, high strength, and high elasticity, the conductor can be made very light and the cost per unit length can be reduced. This has the effect of being able to reduce the

Furthermore, when organic rose-based wholly aromatic polyamide fibers are used, the tensile strength can be dramatically increased and the weight can be significantly reduced.

These low specific gravity, high strength, and high elasticity fibers are all non-conductive due to their physical properties, but because their surfaces are coated with a highly conductive metal film, they have good conductivity. It can be made into a grooved wire, and is extremely useful as a conductor part of an overhead power transmission cable or a conductor wire for a voice coil.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a conductive wire according to the present invention, and FIGS. 2 and 3 are a front view and a plan view of a plating device for manufacturing the conductive wire. Table 1. 〉“Bath composition” Explanation of symbols 1-conductor wire, 2-core material, 3-non-conductive fiber, 4-base plating layer, 5-copper coating (metal coating).

Claims (1)

[Scope of Claims] [1] A metal coating (5) with high conductivity on the surface of a core material (2) made of non-conductive fibers (3) with low specific gravity, high strength, and high elasticity.
A conductor wire characterized by being coated with. [2] The non-conductive fiber (3) is a ceramic fiber,
The conducting wire according to claim 1, which is a para-based wholly aromatic polyamide fiber or a hollow glass fiber. [3] Highly conductive metal coating (5) on the surface of the core material (2) made of low specific gravity, high strength, high elasticity non-conductive fiber (3)
A conductor wire characterized by being made by twisting together multiple coated wires. [4] The conducting wire according to any one of claims 1 to 3, wherein the outer periphery is coated with an insulating coating.