JP2009272191A - Highly slippery insulated wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly slippery insulated wire capable of coping with further acceleration of alignment winding, and suitable for manufacturing various coils such as a spindle motor coil for example. <P>SOLUTION: Insulating paint for an enamel wire is applied and baked on the periphery of a conductor 1 to provide an insulated coat 2, a slipperiness imparting paint obtained by adding a fatty acid-based lubricant to a resin solution in which a 6-nylon based resin is dissolved in an organic solvent by 0.5-5.0 wt.% to the resin weight portion of the solution and mixing them is applied and baked to the periphery to form a slippery coat 3, which in turn is used as the highly slippery insulated wire 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an insulated wire. More specifically, the present invention relates to a highly-slidable insulated wire excellent in aligned winding property and high-speed winding property suitable for manufacturing various coils such as a spindle motor coil, a power transformer coil, a fan motor, and a relay coil.

Insulated wires are manufactured by applying and baking enameled wire insulation paint such as polyurethane insulation paint, polyester insulation paint, polyesterimide insulation paint, polyamideimide insulation paint, or polyimide insulation paint onto conductors such as copper wire and aluminum wire. ing. Insulated wires are widely used in various coils such as spindle motor coils and power transformer coils. These various coils are usually manufactured by using an automatic winding machine to perform aligned winding of insulated wires. In recent years, aligned winding by an automatic winding machine has been speeded up in order to improve coil production efficiency. However, the insulated wire is inferior in the sliding property of the insulating film and cannot cope with the high speed of the aligned winding. Therefore, there is a demand for a sliding insulated wire that is excellent in slipping property of the insulating film and can cope with high speed of the aligned winding. In addition, as shown in the following Patent Document 1, a method of applying liquid paraffin to the surface of an insulating film is known in order to impart sliding properties to an insulated wire.
JP-A-60-158507

Even if the method of applying liquid paraffin to the surface of the insulating film is used, the sliding property of the insulating film is insufficient, and it is not possible to cope with the further increase in the speed of the aligned winding by the automatic winding machine in recent years. There was a point.
The present invention has been made to solve the various problems of the prior art described above, and can cope with further increases in the speed of the aligned winding. Various coils such as a spindle motor coil, a power transformer coil, etc. An object of the present invention is to provide a highly slippery insulated electric wire suitable for manufacturing.

As a first aspect, the present invention provides an insulating film by coating and baking an enameled wire insulating paint on the outer periphery of a conductor, and the solution is added to a resin solution obtained by dissolving 6-nylon resin in an organic solvent on the outer periphery. Highly insulated insulated wire formed by applying and baking a lubricity-imparting paint obtained by adding and mixing 0.5 to 5.0% by weight of a fatty acid-based lubricant with respect to the resin weight of It is in.
Examples of the enamel wire insulating paint include polyurethane insulating paint, polyester insulating paint, polyesterimide insulating paint, polyamideimide insulating paint, and polyimide insulating paint.
Examples of the 6-nylon-based resin include resins such as Amilan (registered trademark) CM1014 (melting point: 225 ° C., Toray Industries, Inc.) and Amilan CM1007 (melting point: 225 ° C., Toray, Inc.).
The fatty acid-based lubricant is a resin added to contribute to the improvement of the lubricity of the film. For example, LUNAC S-40T (stearic acid-based lubricant Kao Corporation trade name), LUNAC OA (oleic acid-based lubricant Kao Corporation (Trade name) and the like.
The reason why the amount of the fatty acid-based lubricant added is limited to 0.5 to 5.0% by weight is that if the amount is less than 0.5% by weight, the effect of improving the lubricity of the film is small. This is because even if it exceeds wt%, the effect that contributes to the improvement of the slipperiness is saturated.
Further, it is sufficient that the thickness of the slipping film is 0.005 mm to 0.003 mm.
In addition, when preparing the slipperiness-imparting coating material, the 6-nylon resin is dissolved in an organic solvent to form a resin solution, and then the fatty acid lubricant is added and mixed. For dissolution, for example, it is necessary to stir at 80 ° C. for 3 hours. If the 6-nylon resin and the fatty acid lubricant are dissolved and mixed together at this high temperature and for a long time, there is a risk that the fatty acid lubricant will decompose. Because there is.
In the highly slippery insulated wire according to the first aspect, the fatty acid-based lubricant in the slipperiness-imparting coating bleeds out to the surface of the slippery film during baking and covers the surface of the slippery film. Therefore, high slipperiness is imparted to the slipping film.
As described above, since the highly slippery insulated wire of the present invention imparts high slipperiness to the outermost layer of the slip coat, the alignment of the wire at the time of coil winding is improved, so that the alignment by the automatic winding machine is performed. This is extremely suitable for further speeding up the winding.

According to a second aspect of the present invention, there is provided a highly slippery insulated electric wire characterized in that the fatty acid lubricant is a stearic acid lubricant or an oleic acid lubricant.
In the highly slippery insulated wire of the second aspect, a stearic acid-based lubricant or an oleic acid-based lubricant is preferable as the fatty acid-based lubricant because it provides excellent lubricity to the surface of the wire.

According to the highly slippery insulated wire of the present invention, since the slipperiness film of the outermost layer is imparted with a high slipperiness, it is possible to further speed up the aligned winding by the automatic winding machine, and various coils such as a spindle motor It is suitable for manufacturing a coil, a power transformer coil, and the like.
Therefore, the present invention has an extremely large effect contributing to the industry.

Hereinafter, the contents of the present invention will be described in more detail with reference to embodiments shown in the drawings. Note that the present invention is not limited thereby.
FIG. 1 is a cross-sectional view showing an example of the highly slippery insulated wire of the present invention. FIG. 2 is a perspective view showing a dynamic friction test jig for evaluating the slipperiness of the highly slippery insulated wire of the present invention. (Indicates the state under test)
In these drawings, 1 is a conductor (copper wire), 2 is an insulating film, 3 is a slippery film, 5 is a highly slippery insulated wire (test wire), 10 is a jig for dynamic friction coefficient test, 10a is a fixed base, 10b is a moving base, F is a jig pulling thread, K is a pulley, and W is a weight.

(1) Preparation of lubricity-imparting coating The preparation of the lubricity-imparting coating of the present invention will be described using Table 1 below. Table 1 is a blending composition table of the lubricity-imparting paints of Examples 1 to 6.

-Example Preparation Example 1-
In a 2000 ml separable round bottom flask equipped with a stirrer, a thermometer and a condenser tube, 100.0 g of CM1007 as the main component 6-nylon-based resin and cresol / xylene = 1 as the organic solvent according to the composition table of Table 1 / 900.0 g of a mixed solvent was added, heated and stirred at a temperature of 60 to 80 ° C. for 3 hours, dissolved to obtain a resin solution, and then the solution was cooled to room temperature.
Next, 0.5 g of stearic acid-based lubricant LUNAC S-40T (0.5% by weight with respect to the resin weight of the resin solution) is added to the resin solution as a fatty acid-based lubricant and stirred to a concentration of 10%. A slipperiness imparting paint was prepared.

-Implementation Preparation Examples 2-6-
The same resin solutions as those of Example Preparation Example 1 were used as the resin solutions of Example Preparation Examples 2 to 6, respectively.
Next, according to the composition table of Table 1, 1.0 g of LUNAC S-40T (1.0 wt% with respect to the resin content of the resin solution) in each resin solution (Example Preparation Example 2), 2.0 g (resin) 2.0% by weight with respect to the resin content of the solution) (Example Preparation Example 3), 3.0 g (3.0% by weight with respect to the resin content of the resin solution) (Example Preparation Example 4), 4.0 g (resin 4.0% by weight based on the resin content of the solution) (Example Preparation Example 5) and 5.0 g (5.0% by weight based on the resin weight content of the resin solution) (Example Preparation Example 6) were added and stirred. Thus, a slipperiness-imparting coating having a concentration of 10% was prepared.

(2) Production of highly slippery insulated wire (Comparative example is an insulated wire) An embodiment (Example) of the highly slippery insulated wire of the present invention will be described with reference to FIG. The insulated wire of the comparative example will also be described at the same time.

  A copper insulating wire (1) having a conductor diameter of 0.200 mm is coated and baked with a polyurethane insulating paint to an outer diameter of 0.220 mm to provide an insulating film (2). The slipperiness-imparting paint was applied and baked with a die to provide a slippery film (3), and a highly slippery insulated wire (5) was manufactured and wound on a bobbin (not shown).

  A copper insulating wire (1) having a conductor diameter of 0.200 mm is coated and baked with a polyurethane insulating paint so that the outer diameter is 0.220 mm to provide an insulating film (2). The slipperiness-imparting paint was applied and baked with a die to provide a slippery film (3), and a highly slippery insulated wire (5) was manufactured and wound on a bobbin (not shown).

  A copper insulating wire (1) having a conductor diameter of 0.200 mm is coated and baked with a polyester insulating paint so that the outer diameter is 0.220 mm to provide an insulating film (2). The slipperiness-imparting paint was applied and baked with a die to provide a slippery film (3), and a highly slippery insulated wire (5) was manufactured and wound on a bobbin (not shown).

-Comparative Example 1-
Although not specifically illustrated, liquid paraffin is applied to the bobbin by coating and baking polyurethane insulating paint on a copper wire having a conductor diameter of 0.200 mm so that the outer diameter is 0.220 mm and applying an insulating film. Winded up.

—Comparative Example 2—
Although not specifically illustrated, polyester resin is applied and baked to a copper wire having a conductor diameter of 0.200 mm so that the outer diameter is 0.220 mm, and liquid paraffin is applied to an insulated wire provided with an insulating film to the bobbin. Winded up.

(3) General characteristics and slipperiness evaluation test of highly slippery insulated wires (comparative example is an insulated wire) General characteristics and slipperiness of the highly slippery insulated wires of Examples 1 to 3 and the insulated wires of Comparative Examples 1 and 2 An evaluation test was conducted. The results are shown in Table 2 below. In addition, about slipperiness, it evaluated by the dynamic friction coefficient. The dynamic friction coefficient was tested using a dynamic friction coefficient test jig shown in FIG.
As is clear from Table 2, the high-sliding insulated wires of the present invention obtained according to Examples 1 to 3 have good general characteristics, and the dynamic friction coefficient is approximately that of the insulated wires of Comparative Examples 1 and 2. It can be seen that the slipperiness is extremely excellent because it is as low as half.
In addition, the high slip insulated wire manufactured similarly to the said Example 1 using the slipperiness | lubricity imparting coating material of the said Example preparation examples 2, 4, and 5 is also general characteristics similarly to the highly slipper insulated wire of the said Examples 1-3. And slipperiness was extremely excellent.

  The highly slippery insulated wire of the present invention can cope with further speeding up of the aligned winding, and is suitable for manufacturing various coils such as a spindle motor coil and a power transformer coil.

It is sectional drawing which shows an example of the highly slippery insulated wire of this invention. It is a perspective view which shows the jig | tool for dynamic friction tests for evaluating the slidability of the highly slippery insulated wire of this invention. (Indicates the state under test)

Explanation of symbols

1 Conductor (copper wire)
2 Insulating film 3 Lubricating film 5 High-sliding insulated wire (test line)
DESCRIPTION OF SYMBOLS 10 Dynamic friction coefficient test jig | tool 10a Fixing stand 10b Moving stand F Thread for jig pulling K Pulley W Weight

Claims (2)

  An insulating coating for enameled wire is applied and baked on the outer periphery of the conductor to provide an insulating film, and on this outer periphery, a fatty acid system is added to a resin solution in which a 6-nylon resin is dissolved in an organic solvent. A highly slippery insulated electric wire characterized in that a slippery coating is formed by applying and baking a slipperiness-imparting paint obtained by adding and mixing 0.5 to 5.0% by weight of the above-mentioned lubricant. 2. The highly slippery insulated wire according to claim 1, wherein the fatty acid lubricant is a stearic acid lubricant or an oleic acid lubricant.