JPS60208009A - Noise preventing high voltage resistance wire conductor and method of producing same - 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 The present invention relates to a conductor for a noise-prevention high-voltage resistance wire used in a cable for an internal combustion engine of an automobile, and a method for manufacturing the same.

Conventionally, high-voltage resistance wires such as those mentioned above are made by winding a nichrome wire around a tension member such as glass fiber to maintain strength, and then winding an insulating thread in the gap between the two nichrome wires and adding chloride to this wire. It is coated with an outer covering such as vinyl.

The above-mentioned high-voltage resistance wire is made by winding nichrome wire to lengthen the distance of the conductive path and obtain high resistance, which also prevents electrical noise when igniting an internal combustion engine, for example. .

However, in the case of high-voltage resistance wires as mentioned above, a nichrome wire is wound around the tension member, and an insulating material thread is further wound in the gap between the windings of the nichrome wire, which takes time to manufacture and is prone to breakage in practical use. There was a drawback.

In order to improve this drawback, as shown in FIG. 1, a semiconductive resin layer 2 is formed around the fiber bundle 1, which is the tension member, and an insulating material layer 3 is formed on this resin layer 2. Electric wires using semiconductive resin have been developed, such as a high-voltage resistance electric wire for noise prevention (Japanese Patent Application Laid-open No. 107410/1983) which is coated with a reinforcing layer 4 of interwoven fabric and has an outer sheath 5 formed thereon. High-voltage resistance wires using conductive resin have the advantage of being inexpensive and easy to manufacture, but have the disadvantage of lacking stability in resistance value.

In particular, when using the above-mentioned high-voltage resistance wire in an internal combustion engine, as shown in FIG. 2 is exposed, and this resin N2 is bent 180 degrees to form the terminal fitting 7.
was fitted onto the high voltage resistance electric wire 6 to form a terminal portion. However, the above-described high-voltage resistance wire 6 has a drawback that the resin layer 2 is bent at an acute angle when the terminal fitting 7 is attached, and cracks occur in the resin layer 2 at this bent portion 2o. or may cause separation from the fiber bundle 1, which may lead to poor conductivity.

The present invention aims to eliminate the above-mentioned drawbacks,
It is an object of the present invention to provide a high-voltage resistance wire for noise prevention that can be manufactured easily at low cost, has excellent strength, and is highly reliable.

Therefore, the conductor for a high-voltage resistance wire for noise prevention according to the present invention has a tension member formed by twisting a plurality of fiber bundles formed with a semiconductive resin layer into a tow shape, and a semiconductive resin layer similar to the above semiconductive resin layer. It is characterized by the formation of

Further, according to the method for manufacturing a conductor for noise-preventing high-voltage resistance wires according to the present invention, a plurality of fiber bundles are prepared, each of the fiber bundles is immersed in a semiconductive resin composition bath, and the plurality of semiconductive This method is characterized in that the fiber bundles coated with a conductive resin are twisted together and further immersed in a bath of a semiconductive resin composition similar to the above-mentioned semiconductive resin composition.

The conductor for high-voltage resistance wires for noise prevention according to the present invention is not only inexpensive and easy to manufacture, but also has high strength because it uses a plurality of semiconductive resin-coated fiber bundles and twists them into a tow-like tension member. A noise-preventing high-voltage resistance wire with particularly excellent bending strength can be obtained. In other words, when the semiconductive resin layer is exposed and bent at 180 degrees, the tension member is twisted, so it no longer bends at an acute angle, but instead bends in an arc, and the semiconductive resin layer This has the advantage that there is no risk of cracks or gaps forming in the area.

Furthermore, according to the method for manufacturing a conductor for a high-voltage resistance wire for noise prevention according to the present invention, since a semiconductive resin layer is formed on the fiber bundle in advance, the above-mentioned high-voltage resistance wire for noise prevention can be easily manufactured. There is an advantage.

The present invention will be explained in more detail.

As shown in FIG. 3, which is a cross-sectional view of one embodiment of the wire using the noise-preventing high-voltage resistance wire conductor of the present invention, the fiber bundle, which is the tension member, is covered with a semiconductive resin layer 2 as in the past. A reinforcing material layer 4 is covered around this semiconductive resin layer 2 via an insulating material layer 3, and this reinforcing material layer 3 is further covered with an outer cover 5.

However, the conductor for a noise-preventing high-voltage resistance wire according to the present invention has a semi-conductive resin-coated fiber bundle 10 coated with a semi-conductive resin 11 as a fiber bundle which is the center of the noise-preventing high-voltage resistance wire.
is used, and the plurality of semiconductive resin-coated fiber bundles 10
A twisted material is used as a tension member. Forming the semi-conductive resin layer 11 on the fiber bundle to be twisted in this way is to infiltrate the fiber bundle itself with semi-conductive resin, making it semi-conductive, and partly reducing the function of the noise-preventing high-voltage resistance wire. Even if the semiconductive resin layer 2 further coated on the semiconductive resin-coated fiber bundle 10 peels off or cracks, the function of the noise-preventing high-voltage resistance wire is not lost. This is to ensure that. Therefore, there are advantages in that the strength due to bending etc. is improved and the resistance value is stabilized. Furthermore, the semiconductive resin layer 11 covering the fiber bundle improves the adhesion with the outer semiconductive resin layer 2, resulting in an advantage of improved peel strength.

The resin component of such a semiconductive resin may be any material conventionally used in this type of material. For example, one or more of NBR, EPM, fluororubber, acrylic, butyl rubber, silicone resin, silicone rubber, urethane, nylon, fluorosilicone, etc. can be used.

etc. can be used.

The conductive material for imparting conductivity to the resin described above is basically not limited, but for example, one or more types of conductive carbon black (such as Ketjen black), graphite, and carbon fiber may be used. Can be used.

Furthermore, examples of the fiber material used as the fiber bundle coated with such semiconductive resin 11 include Kevlar fiber, glass fiber, polyester fiber, nylon fiber, and natural fiber.

Twisting a plurality of such semiconductive resin-coated fiber bundles 10,
In the tension member according to the present invention, the number of the semiconductive resin-coated fiber bundles IO to be twisted is:
Although three are shown in this embodiment, this number is not fundamentally limited in the present invention. In order to obtain the required strength, if the semiconductive resin-coated fiber bundle 10 is thin, a large number of the semiconductive resin-coated fiber bundles 10 is required, and if the semiconductive resin-coated fiber bundle 10 is thick, a small number is required compared to the above case. This is because it will be sufficient. Generally 1.
It is preferable to set the diameter to 0 to 2.0 in terms of the thickness and strength of the noise-preventing high-voltage resistance wire.

The twisting pitch is preferably 10 to 20M. If the twist pitch is less than 10u+, elongation will occur, resulting in poor stability of the resistance value, and if the twist pinch exceeds 20 fl, there will be no effect on bending.

A plurality of twisted semiconductive resin-coated fiber bundles 10
A semiconductive resin layer 2 is further formed on the surface of the tension member. Such a semiconductive resin layer 2 is not limited in the present invention, and may be of any type as long as it is conventionally used as a high resistance conductive part of this type of noise-preventing high-voltage resistance wire, for example, as a resin component. is NBR
, EPM, fluororubber, acrylic, )chill rubber, silicone resin, silicone rubber, urethane, nylon, fluorosilicone, and the like can be used.

Further, the conductive material that imparts conductivity to the resin component is not fundamentally limited, and one or more of graphite, conductive carbon blank (Ketjen blank, etc.), carbon fiber, etc. can be used.

As the insulating material layer 3 covering such a semiconductive resin layer 2, it is preferable to use a material having good peelability from this semiconductive resin layer 2. This is because the insulating material layer 3 must be peeled off from the semiconductive resin layer 2 when attaching the noise-preventing high-voltage resistance wire 6 to the terminal fitting 7.

The insulating material layer 3 is covered with a reinforcing material layer 4 and a jacket 5, and the reinforcing material layer 4 and jacket 5 are made of reinforcing materials conventionally used in this type of noise-preventing high-voltage resistance wire. and outer covering material can be used effectively.

Next, a method of manufacturing a noise-preventing high-voltage resistance wire according to the present invention will be explained.

To produce the noise-preventing high-voltage resistance wire according to the present invention, first, a plurality of fiber bundles are prepared, and the plurality of fiber bundles are immersed in a semiconductive resin bath. Pre-coating the fiber bundle with semi-conductive resin in this way is done by infiltrating the fiber bundle itself with semi-conductive resin, making it semi-conductive and partly reducing the function of the noise-preventing high-voltage resistance wire. Even if the semiconductive resin layer 2 further coated on the semiconductive resin-coated fiber bundle 10 peels off or cracks, the function of the noise-preventing high-voltage resistance wire is not lost. In addition to this, in forming the semiconductive resin layer 2, when immersed in a semiconductive resin bath, the adhesion of the semiconductive resin liquid is improved, which facilitates manufacturing. It is from.

The solvent used in the semiconductive resin bath may be any solvent as long as it can effectively dissolve the semiconductive resin. For example, toluene, xylene, acetone,
One or more of MEK, MIBK, butyl acetate, cyclohexane, etc. can be effectively used.

After the semiconductive resin is attached to the fiber bundle in this way, it is heated to scatter the solvent and harden it.

The plurality of semiconductive resin-coated fiber bundles thus produced are twisted using a twisting machine or the like.

Preferred twisting pinches are as described above.

The thus twisted semiconductive resin coated fiber bundle is further immersed in a semiconductive resin bath to form a semiconductive resin layer.

After the semiconductive resin is attached to the semiconductive resin-coated fiber bundle in this manner, it is heated to scatter the solvent and harden to form a semiconductive resin layer.

The semiconductive resin layer is thus coated with an insulating material layer and a reinforcing layer by conventional methods, and finally covered with an outer sheath to obtain a noise-preventing high-voltage resistance wire.

The present invention will be explained in detail below.

A Kevlar fiber bundle of Example 1500d was thoroughly dipped in a semiconductive paint having the following composition, pulled up through a die of 1.3 ljφ, dried and vulcanized in a hot air dryer at 150° C. for 10 minutes. At this time, the resistance value was 150Ω/■. Next, the three conductive fiber bundles were twisted into 15fl by a twisting machine.
Pitch stranded wire was made. This stranded wire is again dipped in the paint of formulation B, pulled up through a die of 2 wφ, dried and vulcanized at 150°C for 10 minutes, and then continuously dipped in the paint of formulation B, passed through a die of 2 wφ. It was pulled up through a filter and dried at 150° C. for 10 minutes. The resistance value of this stranded wire conductor was 18±2Ω/I11. Finally 200℃
After drying for 24 hours, vulcanization was performed. The resistance value of the final product was 16±IKΩ/m.

Compound A B Fluorosilicone rubber 100 100 Keftien carbon 4030 Graphite 302゜Dicumyl peroxide 2015 Toluene 5000 5000 Cyclohexane 4000 4000 (parts by weight) As explained above, according to the noise-preventing conductor for high-voltage resistance wire according to the present invention, the fiber bundle Since the fiber bundle is coated with a semiconductive resin in advance, the semiconductive resin permeates into the fiber bundle itself, making it semiconductive and partially functioning as a noise-preventing high-voltage resistance wire. Even if the semiconductive resin coated fiber 2 is further coated on the semiconductive resin coated fiber,
It has the advantage that even if it peels off or cracks, the function of the noise-preventing high-voltage resistance wire is not lost. Furthermore, there is an advantage that the adhesion between the semiconductive resin-coated fiber bundle and the semiconductive resin layer coated thereon is improved, and the strength is improved.

In addition, by using a plurality of such semiconductive resin-coated fiber bundles,
Since this is twisted to form a tension member, even if it is bent 180 degrees, it will not bend at an acute angle.
Since the wire is bent into a circular arc, there is an advantage that there is no risk of breaking the wire at the bent portion.

Furthermore, according to the method for manufacturing a conductor for noise-preventing high-voltage resistance wires according to the present invention, a semiconductive resin layer is formed on a tension member made by twisting a plurality of semiconductive resin-coated fiber bundles. When immersed in a semiconductive resin bath, there is also the advantage that the adhesion of the semiconductive resin liquid is improved.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of an example of a conventional noise-preventing high-voltage resistance wire.
FIG. 2 is a cross-sectional view of a noise-preventing high-voltage resistance wire attached to a terminal fitting, and FIG. 3 is a cross-sectional view of a specific example of the noise-preventing high-voltage resistance wire according to the present invention. 1...Fiber bundle, 2...Semiconductive resin layer, 3.
... Insulating material layer, 4 ... Reinforcement layer, 5 ... Outer covering, 1
0...Semiconductive resin coated fiber bundle, 11...Semiconductive resin layer. Applicant's representative: Masaki Amemiya BglfJ5'$f - June 13th, Director of the Japan Patent Office Kazuo Wakasugi 1, Indication of the case, 2005 Patent Application No. 064396, 2, Name of the invention: Conductor for high-voltage resistance wire for noise prevention and Its manufacturing method 3,
Relationship with the case of the person making the amendment Patent applicant Address: 2-11-20-4 Nishigotanda, 711-ku Tokyo Parts, Agent: Mushroom 03-264-35666, Contents of amendment 11) Page 7, line 4, U etc. can be used. ” will be deleted. (2) Page 11, line 5, “twist” is “j, su, su”
I am corrected. (3) Page 11, last line, ``Correct J to [bath J and δj.

Claims (1)

[Claims] +11 A tension member formed by twisting a plurality of fiber bundles each having a semiconductive resin layer formed thereon in a tow shape is characterized by forming a semiconductive resin layer similar to the above semiconductive resin layer. Noise-prevention conductor for high-voltage resistance wires. (2) Prepare a plurality of fiber bundles, immerse each of the fiber bundles in a semiconductive resin composition bath, further twist the plurality of semiconductive resin-coated fiber bundles, and further add the semiconductive resin composition. 1. A method for producing a conductor for noise-preventing high-voltage resistance wires, which comprises immersing the conductor in a semiconductive resin composition bath similar to that of the conductor.