JPS621761A - Surface-lubricated insulated 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 Industrial Application" The present invention relates to a surface-lubricated insulated wire used as a wire for equipment coils such as electrical and communication equipment.

``Prior art'' As the winding speed of insulated wires used in equipment coils has increased in recent years, improving the resistance to deterioration during processing has become a major issue. There is a method to reduce friction during the winding process by adding lubricity to the surface of the wire.

Conventionally, the above-mentioned surface temperature s'ii wire has been made by applying a lubricating material such as Snifoil or Transura lubricating oil, paraffin, or wax to the surface of an insulated wire such as enameled wire, or the above-mentioned insulated wire. A sheet of paper with nylon paint or the like applied and baked is used.

``Problems to be Solved by the Invention'' 1. Conventional surface-lubricated electric wires require two steps: baking an insulating material such as enamel, and applying a lubricating material. For this reason, the manufacturing process for the above-mentioned electric wire is complicated and has the problem of high cost.

Furthermore, among the above electric wires, it is difficult to apply lubricating oil, wax, or paraffin evenly, and since these lubricating materials are only coated, friction This has the disadvantage that the wire easily comes off, causing the winding device to be damaged during the winding process.

``Object of the Invention'' This invention was made in view of the above circumstances, and aims to provide a surface-lubricated insulated wire having a simple manufacturing process, low cost, and high insulation performance.

``Structure of the Invention'' The surface-lubricated insulated wire of the present invention is obtained by applying a paint made by adding a wax-based lubricant to a powder paint in an amount of 0.5 to low L, and then baking it onto the conductor surface.

"Specific Structure of the Invention and Its Effects" FIG. 1 is a diagram showing a first embodiment of the surface-lubricated insulated wire of the present invention. In this figure, reference numeral 1 denotes a conductor having a circular cross section and made of a conductive material such as copper or aluminum. An insulating layer 2 having a uniform thickness is formed on the outer periphery of the conductor l. This insulating layer 2 is made of a base resin such as epoxy resin, polyamide resin, or polyester resin in which a wax-based lubricant is uniformly dispersed.

Next, a method for manufacturing this self-lubricating insulated wire will be explained.

Suitable wax-based lubricants for use in this invention include carnauba wax, montan wax, paraffin wax, Nerac, and low molecular weight polyethylene, and these may be used alone or in combination.

Base resins include epoxy, polyamide, polyester, acrylic, and polyetheretherketone (PEE).
K), urethane, vinyl chloride resin, etc., and these may be used alone or in an appropriate combination of two or more.

Next, 0.5 to 10 wt% of this wax-based lubricant is added to the base powder coating and kneaded.

If the addition rate is less than 0.5wt%, the surface lubrication effect will be low, and if it is more than 10wt%, a bleed phenomenon will occur where the lubricant will precipitate on the surface of the insulating layer, even though it has excellent lubricity. This impairs the appearance of the insulating layer, and further deteriorates the heat resistance and electrical properties of the insulating layer. Next, the powder coating thus prepared is uniformly applied to the conductive wire and baked. As a coating method, a film is formed using an ordinary electrostatic powder coating method.

The surface-lubricated insulated wire manufactured in this way has extremely high surface lubricity, and even if it is wound at high speed when manufacturing equipment coils, etc., the insulation layer 2 will not crack or the insulation layer 2 will be damaged. It will not peel off.

Furthermore, this electric wire has a single-layer structure in which the insulating layer 2 itself has lubricating properties, and is manufactured by applying and baking operations twice, so that the manufacturing process is simpler and the cost can be lowered than in the past.

Furthermore, even when the wire surface is strongly rubbed, the wax-based lubricant is always exposed on the wire surface and maintains slipperiness, so it has extremely high resistance to processing deterioration.

Note that, as shown in FIG. 2, it is possible to provide a structure in which an insulating layer 3 made of another insulating material is provided between the conductor 1 and the above-mentioned insulating layer 2.

Further, the conductor 1 may have a cross section other than a circular shape, and various modifications such as a flat A1 wire can be considered as necessary.

"Experiment example" Hereinafter, the effects of the present invention will be made clearer by giving experimental examples.

(Experiment Example 1) Powder Epoquin Resin X R-5256 97 manufactured by Kahei 3M
3 parts by weight of 125°F paraffin (melting point 52°C) as an anti-friction agent was added to the weight part and ground at low temperature to prepare a powder coating having an average particle size of 25 μm. Next, this powder coating was applied and baked on a 1.0+x copper wire so that the thickness of the insulating layer was 40 μm, thereby producing a surface-lubricated insulated wire.

(Experiment Example 2) Montan wax (unbleached Montan No. 2) was used as a lubricant.
418.1ko Fine Products (melting point 76-80℃)
The same operation as in (Experimental Example 1) was performed except that .

(Comparative Example 1) Powdered Evokin resin X R-5256 manufactured by Kahei 3M Co., Ltd.
The insulating layer was coated and baked on a 0 mm copper wire so that the thickness of the insulating layer was 40 μm. Next, Snifoil was applied as a lubricant to the outer periphery of the wire to create a surface-lubricated insulated wire.

(Comparative Example 2) The same operation as in Comparative Example 1 was carried out except that 125° F. rough-in was used as the lubricant.

Next, the comparison results shown in Table 1 were obtained for the four lubricated insulated wires obtained as described above.

As is clear from the results in Table 1, this self-lubricating insulated wire exhibits high wear resistance.

``Effects of the Invention'' The surface-lubricated insulated wire of the present invention uses a wax-based coating agent added to an insulating powder coating and uniformly dispersed powder, which is coated directly or directly onto the conductor wire. Since it is formed by coating and baking with another insulating layer interposed therebetween, it is possible to skip the manufacturing process by one coating and baking process, and the cost can be reduced.

In addition, since this surface-lubricated insulated wire has lubricity in its insulating layer itself, it does not lose lubricity due to friction or the like, and has excellent processing deterioration resistance.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a first embodiment of the surface-lubricated insulated wire of the present invention, and FIG. 2 is a sectional view showing a second embodiment of the surface-lubricated insulated wire. 1... Conductor wire 2... Insulating layer 3... Other insulating layer

Claims (1)

[Claims] A surface-lubricated insulated wire made by applying and baking a powder coating containing 0.5 to 10 wt% of a wax-based lubricant on the conductor directly or through another insulating layer.