JPS618807A - 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 TECHNICAL FIELD The present invention relates to a surface-lubricated insulated wire in which surface lubricity is imparted to an insulated wire or a self-adhesive insulated wire used as a wire for a coil of equipment such as electric communication equipment.

Prior Art and its Problems As the winding speed of insulated wires increases in recent years, improving the processing deterioration resistance of insulated wires has become a major issue.

To deal with this problem, conventional methods have been to apply and bake a solution of a wax such as a nylon resin paint or shellac wax dissolved in a weak alkaline solvent onto the insulating layer of an insulated wire.

However, insulated wires surface-treated with this method are
Although the surface becomes lubricated and the resistance to processing deterioration increases, seizing requires a process, which increases energy costs.
There is a problem that processing costs are high.

The invention (1) has been made in view of the above circumstances, and aims to provide a surface-lubricated insulated wire that is inexpensive to process and has high lubrication performance.

Structure of the Invention The surface-lubricated insulated wire of the present invention is obtained by dissolving wax in an organic solvent to obtain a wax liquid with a concentration of 0.1 to 7 wt%, and applying this wax liquid to the insulating layer or adhesive layer of the insulated wire. It is.

DETAILED DESCRIPTION OF THE INVENTION The wax used in this invention is a mixture of several types of waxes, which can be roughly classified into the following three types: Group A, Group B, and Group 0.

[Group A wax]

The mixed wax of group A is the following 1. Second. It is composed of a third wax.

The first wax is carnauba wax.
8 or montan wax. Carnauba wax is a type of typical vegetable wax with a melting point of 78-8.
The main component is higher fatty acid ester at 4°C. In addition, Montanwatus is one of the representative mineral waxes.
A seed with a melting point of 76 to 80 °C obtained by high-temperature distillation or solvent extraction of asphaltic lignite,
Those purified by strong acid treatment, alkali treatment, etc. are preferably used. This first wax mainly provides the lubricating performance of the lubricating layer on the insulated wire.

Further, as the second wax, a wax made of a saturated hydrocarbon having a melting point of 50 to 70°C is used.

This wax is mainly composed of a saturated hydrocarbon or a cyclic hydrocarbon having a side chain, and specifically, a microcrystalline wax having a melting point within the above range is used. And the melting point is 5-0
If it is less than 70°C, the effect of improving the lubricity of the lubricating layer will be small, and if it exceeds 70°C, the solubility in organic solvents will decrease, making it impossible to obtain a wax liquid with the desired concentration.

Beeswax is used as the third wax. Beeswax is collected from honeybee hives by heating and pressing, and one with a melting point in the range of 62 to 66°C is selected.

The second wax and the third wax are used to mainly improve the adhesion of the lubricating layer on the insulated wire to the base (insulating layer, adhesive layer).

Then, the first wax, second wax, and third wax are mixed in a predetermined quantitative ratio to form a mixed wax. That is, to 100 parts by weight of carnauba wax or montan wax, 1 to 200 parts by weight of wax or beeswax made of the above-mentioned saturated hydrocarbon having a melting point of 50 to 70 DEG C., either alone or in combination, is added. If it is less than 1 part by weight, the adhesion of the lubricating layer to the substrate will be improved, but if it exceeds 200 parts by weight, the adhesion is good, but the car lubrication performance will deteriorate, resulting in a disadvantage. When using a mixture of beeswax and a wax made of a saturated hydrocarbon having a melting point of 50 to 70°C, the β ratio is not particularly limited and can be selected as appropriate. In other words, although beeswax has excellent adhesion, it tends to reduce lubricity;
The wax made of the saturated hydrocarbon at a temperature of ~70°C has good adhesion and has a low degree of deterioration of lubricity. Therefore, a wax made of saturated hydrocarbons with a melting point of 50 to 70'C is more advantageous, but this wax has a lower solubility in various solvents than beeswax, so the mixing ratio of the two waxes depends on the use of wax liquid. All you have to do is choose the appropriate one depending on the temperature. When the temperature of the wax liquid is high, the solubility of the wax increases, and the melting point is 50 to 70°.
It is possible to increase the amount of wax made of C saturated hydrocarbon, and when the wax liquid temperature is low, the amount of beeswax can be increased.

(Group B Wax) Similarly, the wax of Group B is the same as No. 1. Second. It is composed of a third wax.

Examples of the first wax include waxes made of saturated hydrocarbons having a melting point in the range of 80 to 100°C. This mainly consists of a saturated hydrocarbon having a side chain or a cyclic hydrocarbon, and specifically, a crystal material having a melting point within the above range is used. and 1
．． If the melting point is less than 80°C, the degree of improvement in lubrication performance will be small;
Furthermore, if the temperature exceeds 100°C, solubility in organic solvents cannot be obtained. This first wax mainly provides the lubricating performance of the insulating layer on the insulated wire.

Also, the second. The melting point of the third wax is 50-70℃
The saturated hydrocarbon and beeswax are the same as those described for the waxes in the group, and are used here for the same purpose, and their blending ratios are also the same.

[Group 0 Wax] Group 0 waxes include saturated hydrocarbons whose main components are side chain hydrocarbons and cyclic hydrocarbons with a melting point in the range of 50 to 100°C, specifically microcrystalline waxes. be done. If the melting point is less than 50°C, the degree of improvement in lubrication performance is small, and if it exceeds 100''C, the solubility in organic solvents decreases, and no improvement in lubrication performance can be obtained.

Next, methane series hydrocarbons (n-paraffins) having a melting point of 40 to 70°C are mentioned. This mainly has a carbon number of C20~
The main component is C30 n-paraffin, and commercially available products such as so-called 1106F paraffin, 1251:paraffin, 140''F paraffin, etc. are used. The degree of improvement in lubricating performance is small, and if the temperature exceeds 70°C, the solubility for organic materials decreases, and no improvement in lubricating performance can be obtained.

Additionally, vegetable waxes are used. Carnauba wax, ouricuri wax, candelilla wax, etc. are used for this purpose.

And mineral wax can also be used. Examples of this include montan wax and ceresin wax. These waxes may be used alone or in a mixture of two or more. Although these waxes are not as good as the above group A and B waxes in terms of adhesion to the base of the lubricating layer (insulating layer, adhesive layer) on insulated wires, the processing costs associated with their formulation etc. It is advantageous in some respects.

[Wax application]

The above wax is dissolved in an organic solvent to obtain a wax liquid with a concentration of 0.1 and 7 wt%. As the organic solvent used here, one is selected that does not attack the insulating layer and adhesive layer of the insulated wire and dissolves the wax well. Examples of substances that meet this condition include methane group hydrocarbons having 5 to 10 carbon atoms, naphtha, which is a petroleum refined product, xylene, toluene,
Examples include kerosene, but hexane, heptane, octane, nanosa, palm oil, and the like are preferable because they pose no health and safety problems and have a high evaporation rate.

Then, the wax is heated to about 50° C. and dissolved in these organic solvents to form a wax liquid having a concentration of 0.1 to 7 wt%. If the concentration is less than 0.1 wt%, the thickness of the lubricating layer formed by applying this wax liquid will be too thin and the degree of improvement in lubricating performance will not be sufficient, and if it exceeds 7 wt%, the thickness of the lubricating layer will be too thin. The wax becomes too thick, causing problems such as peeling of the wax when winding the resulting surface-lubricated insulated wire into a coil or the like. This wax liquid can be used at room temperature or at 30°C.
It is applied to insulated wires or self-adhesive insulated wires while keeping the temperature at ~50°C. 30~ if the solubility is low at room temperature
Although heating to 50° C. is preferable, sufficient lubrication performance can be obtained even at room temperature by applying a method such as two coats.

This wax liquid can be applied to the insulated wire as appropriate depending on the situation, such as by immersing the insulated wire in the wax liquid and squeezing it with a felt shibori, or by touching and running the insulated wire on felt soaked in the wax liquid. method can be taken. After applying the wax, the organic solvent is volatilized by air drying at room temperature or hot air to form a surface lubricating layer made of wax. If an organic solvent with a relatively low boiling point such as hexane or heptane is used, air drying at room temperature is sufficient;
If a material with a relatively high boiling point such as naphtha is used, it is preferable to perform hot air drying by blowing hot air such as a hot jet or by running it in a hot air oven.

The surface-lubricated insulated wire thus obtained has a lubricating layer made of wax and has a high surface temperature.
It exhibits slippery properties, and does not cause scratches on the insulating layer or adhesive layer, or peeling of these layers during high-speed winding. Furthermore, since this method only involves applying and drying the wax liquid, there is no need for the conventional baking process, and energy costs can be kept low. Furthermore, since the wax has a low melting point, it hardly impairs the adhesive performance of the self-adhesive insulated wire. Furthermore, polyurethane wire,
It can also be applied to all insulated wires such as polyvinyl formal wire, polyester wire, polyesterimide wire, and polyimide wire.

〔Example〕

Examples are shown below to clarify the effects of the present invention.

A polyester imide wire, a polyester wire, and a polyester wire with an insulating layer thickness of 40 μm obtained by enamel baking a 1.0 mm mm diameter copper wire. A self-adhesive polyester imide wire obtained by applying a 30% cyclohexanone solution of phenoxy resin to an adhesive layer thickness of 15 μm on a polyester imide wire with an insulating layer thickness of 30 μm obtained by namel baking. 1t1: each was prepared.

Separately, waxes having the formulations shown in Table 1 were prepared. This wax was dissolved in a powder at various concentrations, applied to the above various insulated wires, and hot air at 100° C. was blown using a hot jet to form a lubricating layer to produce surface-lubricated insulated wires. Regarding the obtained surface-lubricated insulated wire, J
13.1.1 of IS-C-3003. According to (2), the number of reciprocating wear was determined at a load of 700q, and the coefficient of dynamic friction was also determined. Regarding the self-adhesive insulated wire, a coil made by tightly winding the test wire around a 6.4M diameter mandrel was heated at 180°C for 30 minutes to harden the adhesive, and then the coil was heated at room temperature with a span of 45mm. Adhesive strength was evaluated by determining transverse rupture strength when bent. The results are shown in Tables 2 and 3.

Effects of the Invention As is clear from Tables 2 and 3, this surface-lubricated insulated wire exhibits high surface lubrication performance. In addition, when manufacturing this surface-lubricated insulated wire, there is no need for a baking process, and energy costs can be reduced at low temperatures.
Since it does not impair the adhesive properties of self-adhesive insulated wires, it has the advantage of being applicable to all types of wires, including self-adhesive insulated wires.

Claims (4)

[Claims] (1) Wax dissolved in an organic solvent with a concentration of 0.1~
A surface-lubricated insulated wire characterized in that a 7wt% wax liquid is applied onto an insulating layer or an adhesive layer of the insulated wire. (2) The wax has a side chain having a melting point of 50 to 70°C, based on 100 parts by weight of wax made of a saturated hydrocarbon whose main component is a side chain hydrocarbon or cyclic hydrocarbon with a melting point of 80 to 100°C. It is a mixed wax made by adding 1 to 200 parts by weight of wax and/or beeswax made of saturated hydrocarbons mainly composed of cyclic hydrocarbons and cyclic hydrocarbons, and has a concentration of 0.1 to 7 wt% when dissolved in an organic solvent. Claim 1, which is obtained by applying the wax liquid to an insulating layer or an adhesive layer of an insulated wire.
The surface-lubricated insulated wire described in . (3) The wax is a wax and/or beeswax made of a saturated hydrocarbon whose main component is a side chain hydrocarbon or a cyclic hydrocarbon with a melting point of 50 to 70°C based on 100 parts by weight of carnauba wax or montan wax. It is a mixed wax made by adding 1 to 200 parts by weight of
．． The surface-lubricated insulated wire according to claim 1, characterized in that the wax liquid has a concentration of 1 to 7 wt% and is applied onto an insulating layer or an adhesive layer of the insulated wire. (4) The wax is vegetable wax, mineral wax, saturated hydrocarbon whose main component is a side chain hydrocarbon or cyclic hydrocarbon with a melting point of 50 to 100°C, or methane with a melting point of 40 to 70°C. At least one kind selected from type hydrocarbons, which is dissolved in an organic solvent to form a wax liquid with a concentration of 0.1 to 7 wt%, and is coated on the insulating layer or adhesive layer of the insulated wire. A surface-lubricated insulated wire according to claim 1.