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High-performance corona-resistant powder coating for varnished wire and preparation method and application thereof

A powder coating, enameled wire technology, applied in polyester coatings, epoxy resin coatings, coatings, etc., can solve the problems of poor breakdown resistance and corona resistance, and the physical and chemical properties of the coating film cannot solve the corona resistance. Achieve excellent corona damage resistance, improve inter-turn electric field distribution characteristics, and improve thermal conductivity.

Pending Publication Date: 2015-09-30
山东朗法博粉末涂装科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stability of the physical and chemical properties of the coating film cannot solve the improvement in its corona resistance performance, and the anti-puncture and corona resistance performance is not so excellent

Method used

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  • High-performance corona-resistant powder coating for varnished wire and preparation method and application thereof
  • High-performance corona-resistant powder coating for varnished wire and preparation method and application thereof
  • High-performance corona-resistant powder coating for varnished wire and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The high-performance corona-resistant powder coating for enameled wire is made of the following raw materials in weight percentage:

[0031]

[0032] The above raw materials are mixed evenly, melted and extruded by an extruder, tableted, air-cooled, pulverized, sieved, and demagnetized to obtain a high-performance corona-resistant powder coating for enameled wires.

[0033] The high-performance corona-resistant powder coating for enameled wire prepared in this example is sprayed on the surface of the workpiece with an electrostatic spray gun, the voltage is controlled at 82kV, and the air pressure is controlled at 0.20MPa, and then it is heated and cured in an electric blast drying oven at a curing temperature of 200 ℃, curing time is 8min.

[0034] The performance test results of the obtained coating film after curing are shown in Table 1.

[0035] Table 1 Performance Test Results of Example 1

[0036]

[0037]

Embodiment 2

[0039] The high-performance corona-resistant powder coating for enameled wire is made of the following raw materials in weight percentage:

[0040]

[0041] The above raw materials are mixed evenly, melted and extruded by an extruder, tableted, air-cooled, pulverized, sieved, and demagnetized to obtain a high-performance corona-resistant powder coating for enameled wires.

[0042] The high-performance corona-resistant powder coating for enameled wire prepared in this example is sprayed on the surface of the workpiece with an electrostatic spray gun, the voltage is controlled at 88kV, and the air pressure is controlled at 0.23MPa, and then it is heated and cured in an electric blast drying oven at a curing temperature of 190 ℃, curing time is 10min.

[0043] The performance test results of the obtained coating film after curing are shown in Table 2.

[0044]Table 2 Example 2 Performance Test Results

[0045]

[0046]

Embodiment 3

[0048] The high-performance corona-resistant powder coating for enameled wire is made of the following raw materials in weight percentage:

[0049]

[0050] The above raw materials are mixed evenly, melted and extruded by an extruder, tableted, air-cooled, pulverized, sieved, and demagnetized to obtain a high-performance corona-resistant powder coating for enameled wires.

[0051] The high-performance corona-resistant powder coating for enameled wire prepared in this example is sprayed on the surface of the workpiece with an electrostatic spray gun, the voltage is controlled at 86kV, the air pressure is controlled at 0.21MPa, and then it is heated and cured in an electric blast drying oven at a curing temperature of 180 ℃, curing time is 12min.

[0052] The performance test results of the obtained coating film after curing are shown in Table 3.

[0053] Table 3 Example 3 coating film performance testing results

[0054]

[0055]

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Abstract

The invention belongs to the technical field of powder coating, and particularly relates to a high-performance corona-resistant powder coating for a varnished wire and a preparation method and application thereof. The high-performance corona-resistant powder coating for the varnished wire is made of the following raw materials of 68 to 86 % of resin, 0.1 to 0.5 % of solidification promoting agent, 0.8 to 3 % of inorganic nano-materials, 0.1 to 1.5 % of flatting agent, 0.3 to 0.6 % of benzoin, 0.2 to 1 % of degassing agent, 0 to 0.5 % of organic bentonite, 0.6 to 0.8 % of antioxidant, 8.12 to 23.15 % of filler and 0.8 to 4.5 % of pigment. The high-performance corona-resistant powder coating for the varnished wire has the advantages of being simple in formula, stable in coating gloss, good in oil resistance and adhesive force, good in outdoor durability and the like, the mechanical property of the high-performance corona-resistant powder coating for the varnished wire is better than that of a traditional paint-type varnished wire, and the high-performance corona-resistant powder coating for the varnished wire is environmentally friendly and free from pollution.

Description

technical field [0001] The invention belongs to the technical field of powder coatings, and in particular relates to a high-performance corona-resistant powder coating for enameled wires, a preparation method and application thereof. Background technique [0002] With the development of power electronics technology, frequency conversion speed regulation has been rapidly promoted. The speed regulation structure is simple, the investment cost is light, and the use is convenient, which is beneficial to control the production process and improve the quality, and can save about 30-40% of the motor energy. Therefore, frequency conversion motors have wide application prospects in mining, metallurgy, electric power, transportation, household appliances, military industry, etc. However, the pulse wave provided by frequency conversion IGBT and PWM speed control device has a towering peak, a steep rise space, plus variable or extremely high frequency, and factors such as partial disch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/02C09D167/00C09D7/12
Inventor 张剑肖建刚李国威
Owner 山东朗法博粉末涂装科技有限公司
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