Introduction
Enameled wire is one of the most basic electrical materials as a winding wire, and has a large market space as a product supporting the electronics and electrical industry. Due to the friction between the enameled wire and mechanical equipment (guide wheel, mold, winding machine parts, etc.) into a tight, applicable coil.
In addition, since the enameled wire is wound from the original shaft to the wire package, it needs to go through 6 winding shafts and two times of felt wiping. The diameter of the enameled wire is sometimes as small as 0.03mm, so it is easy to be scratched if it is not protected. This causes the already thin wire to become locally thinner, which affects its strength and electrical conductivity.
Material Properties
Lubricants are used in the production of enameled wires to make the wires neat and tight. The lubricant can also improve the surface wetting performance of the enameled wire, and the enameled wire with good surface wetting performance can prevent the wire diameter from being thinned and improve the wear resistance during use.
For a long time, kerosene and anhydrous transformer oil are mostly used as lubricants on the surface of the insulating layer in the production of enameled wires in my country. With the continuous improvement of the winding machine, its winding speed has been continuously increased, from the original 4000 rpm to 12000~15000 rpm, and there are higher requirements for the wear resistance of the enameled wire, and the original lubricating oil gradually cannot meet the requirements.
In the 1980s, paraffin dissolved in gasoline was used as the lubricating oil on the surface of the enameled wire. The lubricity of the enameled wire has been greatly improved, but there are still many problems. If the solubility of paraffin wax (including chemical wax) is not good and it is easy to precipitate, such enameled wire is prone to wax accumulation and wire breakage when winding coils.
In recent years, some domestic or imported enameled wire lubricating oils have come out on the market. Most of them are still wax solutions, and some products are resin solutions, but the time attached to the enameled wire is not long, and the wear resistance or slipperiness is poor. So far, no ideal enameled wire lubricating oil has been seen.
Formula
1: liquid paraffin 20g, beeswax 30g; Methicone 50g, No. 120 mineral spirits 450g; No. 200 mineral spirits 450g. Heat liquid paraffin, beeswax, and methyl silicone oil to 40 degrees and stir to mix thoroughly. After cooling down to room temperature, add No. 120 solvent oil and No. 200 solvent oil, and stir until fully mixed.
2: beeswax 20g; Methyl silicone oil 20g, cyclohexane 400g, No. 120 solvent naphtha 200g; No. 200 solvent naphtha 360g. Heat liquid paraffin, beeswax, and methyl silicone oil to 60 degrees and stir to mix thoroughly. After cooling down to room temperature, add cyclohexane, No. 120 solvent oil and No. 200 solvent oil, and stir until fully mixed.
3: liquid paraffin 20g, beeswax 80g; Methyl silicone oil 50g, cyclohexane 250g, No. 120 solvent naphtha 400g; No. 200 solvent naphtha 200g. Heat liquid paraffin, beeswax, and methyl silicone oil to 50 degrees and stir to mix thoroughly. After cooling down to room temperature, add cyclohexane, No. 120 solvent oil and No. 200 solvent oil, and stir until fully mixed.
4: liquid paraffin 20g, methyl silicone oil 50g, cyclohexane 30g, No. 120 solvent naphtha 450g; No. 200 solvent naphtha 450g. Heat liquid paraffin, beeswax, and methyl silicone oil to 50 degrees and stir to mix thoroughly. After cooling down to room temperature, add cyclohexane, No. 120 solvent oil and No. 200 solvent oil, and stir until fully mixed.
Test Experiment
1. Tensile test: Wind a 50-meter-long enameled wire with a diameter of 0.05mm into a wire package, then loosen it slowly and gently, and measure the length of the wire. The test product is 50.04 meters, and the reference product is 50.13 meters. The test shows that the film formed by the lubricating oil of the present invention on the surface of the enameled wire enhances the tensile strength of the enameled wire.
2. Pressure test: Wind a 50-meter-long enameled wire with a diameter of 0.05mm into a wire package, then loosen it slowly and gently, and test it on the enameled wire pressure tester. Before winding, the test product has a pressure resistance of 4000 volts; after winding The withstand voltage of the test product is 3800 volts; the withstand voltage of the reference product before winding is 4000 volts; the withstand voltage of the reference product after winding is 3600 volts.
3. Scratch resistance test: Enameled wire with a diameter of 0.05 mm is evaluated by an electric pencil scratch hardness tester to evaluate the scratch hardness of the enameled wire paint film. Scratch the surface of the coating at an angle of 45°, and the pencil hardness label with the hardest hardness that cannot identify the damage and scratch of the paint film is the pencil scratch value. Each of the test product and the control product was carried out 3 times, and the average value was obtained. The average value of the test product was 376 times, and the average value of the reference product was 283 times.
4. Customer experience: The customer uses the same brand winding machine to wind the wire. The test product can withstand the winding speed of 12000 rpm, and all the indicators of the wound wire package meet the standards. The reference product can only withstand the winding speed of 8000 rpm, and breakage occurs at 12000 rpm.
