JP2555175B2 - Self-lubricating insulated wire - Google Patents

Description

The present invention relates to a self-lubricating insulated electric wire.

(Prior Art) In recent years, labor-saving and rationalization have been actively carried out in manufacturing electric devices. Insulated electric wires, such as the enamel wire used, may be complicatedly processed in various ways and may be seriously damaged. Such damage is due to, for example, rationalization during coil processing, automation and speedup through the introduction of a high-speed automatic winding machine, and the increase in space factor due to downsizing and high performance of the equipment itself. is there. Such speedup and improvement of the space factor are
It becomes a very severe condition for the enameled wire used.
That is, as the speed increases, friction and wear with pulleys and guides increase, the insulating layer is broken in some cases, and the space factor improvement causes complicated bending deformation and the like, which is a cause of problems such as electrical characteristics. Can be. Therefore, the lubricity represented by the slipperiness of the enameled wire is one of the important characteristics of the enameled wire from the viewpoint of preventing the damage.

Conventionally, in order to improve the lubricity of the electric wire surface, for example, a method of applying a lubricating oil or paraffin wax or a method of applying a resin having lubricity has been used.

(Problems to be Solved by the Invention) However, in the case of a refrigerator using a refrigerant such as an air conditioner or a refrigerator, wax is eluted into the refrigerant to accelerate the decomposition of the refrigerant or to prevent equipment failure. It is known to be the cause.

In addition, in the overcoating method using a lubricious polyamod resin or the like, it is the actual situation that the productivity cannot be expected to be improved so much in the severe coil processing process such as today.

The present invention, as a result of earnest research in view of such a situation,
This is a self-lubricating insulated wire that is particularly excellent in self-lubricating property.

(Means for Solving the Problems) The present invention relates to a macromonomer 0.01 to 5.0 parts by weight having a silicone unit, and a montanic acid on a conductor directly or through another insulating layer with respect to 100 parts by weight of an insulating resin. A self-lubricating insulated wire comprising a coating layer made of a composition containing 0.1 to 5.0 parts by weight of a wax.

In the present invention, the macromonomer having silicone as a unit can be obtained, for example, by the method described in JP-A-58-164656. Specifically, a macromonomer having a methacryloyl terminal group is obtained by a condensation reaction of 1 mol of α, ω-hydroxydimethylpolysiloxane and 0.25 to 1 mol of γ-methacryloxypropylmethyldichlorosilane. As a commercial product, macromonomer
There is AK-5 (manufactured by Toagosei Chemical Industry Co., Ltd.).

Here, the reason why the amount of the macromonomer having silicone as a unit to 100 parts by weight of the resin content is limited to 0.01 to 5.0 parts by weight is that the coating layer obtained with the lower limit of less than 0.01 parts by weight has a self-lubricating effect. This is because in the case where the composition does not occur and the upper limit of 5.0 parts by weight is compounded, the resulting insulated wire loses the smoothness of the coating surface.

Next, in the present invention, examples of the montanic acid-based wax include montanic acid ester wax and saponified montanic acid ester wax. These show better lubricity than conventional stearic acid, dodecanoic acid and the like. Here, the reason for limiting the compounding amount of this montanic acid-based wax to 0.1 to 5.0 parts by weight is the lower limit of 0.
This is because when the content is 1 part by weight or less, the insulated electric wire obtained does not exhibit surface lubricity, and when the upper limit of 5.0 parts by weight is exceeded, the resulting insulated electric wire has a problem that the surface is roughened, which is not preferable.

These montanic acid-based waxes are obtained as commercial products,
For example, Hoechst wax E, Hoechst wax OP, Hoechst wax P (made by Hoechst Japan), BASF wax E (made by BASF), and the like are available.

As the insulating resin used in the present invention, generally used insulating resins are used without exception, and there is no particular limitation as long as the resin can be applied and baked on the conductor surface. In particular,
Examples thereof include polyester, polyurethane, polyimide, polyamide imide, polyester imide, polyester amide imide, and polyvinyl formal.

And the above additives, macromonomers and waxes
There is a method of adding it so that it is contained in all layers of the insulating film on the conductor, or adding it only to the outermost layer portion through another insulating layer, but good results are obtained in each case. However, since the lubricity of the insulated wire is caused by the outermost layer of the insulating layer, it is preferable to add an additive to the outermost layer forming material of the insulating layer.

Further, the macromonomer and montanic acid-based wax having the silicone as a unit have little effect by themselves, and their coexistence is essential.

(Function) The insulated wire according to the present invention comprises 0.01-5.0 parts by weight of a macromonomer having a silicone unit and 100 parts by weight of a montanic acid-based wax with respect to 100 parts by weight of an insulating resin content directly or via another insulating layer on the conductor. The coating layer is composed of a composition containing ˜5.0 parts by weight, and the macromonomer and montanic acid-based wax act in a synergistic manner to exert a remarkably increased surface lubricity.

(Examples) The present invention will be described below with reference to specific examples.

Example 1 A commercially available polyesterimide resin paint (Telebec 850, manufactured by Dainichiseika Kogyo Co., Ltd.) was applied onto a copper wire diameter (1.0 mm), and this was baked several times at a furnace temperature of 400 ° C.
After that, macromonomer AK-5 was added to the same paint at a resin weight ratio.
Enameled insulated wires with a coating thickness of 40μ were obtained by coating and baking 0.02% and Hoechst wax OP added so that the resin weight ratio was 0.5%, respectively, under the same conditions. When the static friction coefficient of the insulated wire thus obtained was measured, it was 0.045.
The wear resistance (according to JIS C3003) was 2100 g.

Example 2 A commercially available polyesterimide resin coating material (Televec 850 above) was applied onto a copper wire diameter (1.0 mm), and the furnace temperature was 400 ° C.
The baking operation was repeated several times. After that, macromonomer AK-5 was added to the same paint at a resin weight ratio of 5.0%, and Hoechst wax OP was added at a resin weight ratio of 5.0%.
A μ enamel insulated wire was obtained. The coefficient of static friction of the insulated wire thus obtained was measured to be 0.040, and the similar wear resistance was 2000 g.

Comparative Example 1 A commercially available polyesterimide resin paint (Telebec 850 above) was applied on a copper wire diameter (1.0 mm), and the furnace temperature was 400 ° C.
The baking operation was repeated several times to obtain an enamel insulated wire with a film thickness of 40μ. When the static friction coefficient of the insulated wire thus obtained was measured, it was 0.130, and the same abrasion resistance was 1350 g.

Comparative Example 2 A commercially available polyesterimide resin paint (Televec 850 above) was applied onto a copper wire diameter (1.0 mm), and the furnace temperature was 400 ° C.
The baking operation was repeated several times. After that, macromonomer AK-5 was added to the same paint so that the resin weight ratio was 7.0% and Hoechst wax OP was added to the resin weight ratio to be 10.0%, respectively, and applied and baked to obtain an enamel insulated wire with a film thickness of 40μ. It was The static friction coefficient of the insulated wire thus obtained was measured to be 0.100, and the abrasion resistance was 155.
At 0g, the surface of the insulated wire was not smooth.

Example 3 On a copper wire diameter (1.0 mm), in a commercially available polyesterimide resin coating (the above Telebeck 850), the macromonomer AK-5 was 0.02% in resin weight ratio, and Hoechst wax OP was resin weight ratio.
The addition of 0.5% of each was applied, and this was baked at a furnace temperature of 400 ° C several times to obtain an enamel insulated wire having a film thickness of 40μ. When the static friction coefficient of the insulated wire thus obtained was measured, it was 0.045,
The abrasion resistance was 1950 g.

Example 4 A commercially available polyamide-imide resin paint (HI-406-30 manufactured by Hitachi Chemical Co., Ltd.) was applied onto a copper wire diameter (1.0 mm), and baking was repeated several times, and then the macromonomer AK-5 was added to the paint.
Resin weight ratio 1.0%, Hoechst wax E resin weight ratio
The enamel insulated wire with a film thickness of 40μ was obtained by coating and baking each of the added substances so that the content was 1.0%. The static friction coefficient of the insulated wire thus obtained was measured and found to be 0.063.
And the abrasion resistance was 1980 g.

Example 5 Commercially available urethane resin paint (TPU-F) on copper wire diameter (1.0 mm)
_2- NCA Tokushu Paint Co., Ltd.) was applied and baked at a furnace temperature of 400 ° C. for several times. After that, macromonomer AK-5 was added to the same paint at a resin weight ratio of 1.0%, Hoechst wax O.
P was added so that the resin weight ratio was 1.0%, and coating and baking were performed to obtain an enamel insulated wire with a film thickness of 25μ. The coefficient of static friction of the insulated wire thus obtained was measured to be 0.060, and the abrasion resistance was 1250 g.

(Effects of the Invention) As described in detail above, the self-lubricating insulated wire of the present invention has remarkably high surface lubricity due to the mutual action of the macromonomer and montanic acid-based wax coexisting in the insulating layer. It can solve various problems at once, and its industrial effect is very large.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-62-193014 (JP, A) JP-A-58-164656 (JP, A) JP-A-2-194001 (JP, A) JP-A-1- 144504 (JP, A) JP 61-273732 (JP, A) JP 57-103126 (JP, A) JP 1-49117 (JP, A)

Claims (1)

(57) [Claims] 1. A macromonomer of 0.01 to 5.0 parts by weight and a montanic acid wax of 0.1 to 5.0 parts by weight per 100 parts by weight of an insulating resin content directly on a conductor or through another insulating layer. A self-lubricating insulated wire provided with a coating layer made of a composition containing a.