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Device and stripping method for stripping polyimide copper-clad wire coating layer

A polyimide and coating technology, applied in the field of surface treatment of polymer materials, can solve the problems of reducing strength, copper core surface oxidation, heating temperature, etc., to reduce copper core temperature, reduce copper core oxidation, and improve reliability. sexual effect

Active Publication Date: 2021-12-07
BEIJING INST OF AEROSPACE CONTROL DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, mechanical stripping will cause mechanical damage such as scratches on the copper core of the enameled wire, reducing its strength; the laser stripping method uses the instantaneous high temperature generated by the laser to decompose polyimide, but for the enameled wire with a small wire diameter, the instantaneous high temperature will be in A thicker oxide layer is formed on the surface of the copper core and even the copper core is melted; the method of chemical corrosion is to heat the solid alkali to above 400°C to melt it and decompose the polyimide coating. After removal, the surface of the copper core is severely oxidized, which affects the welding quality and takes a long time to prepare

Method used

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  • Device and stripping method for stripping polyimide copper-clad wire coating layer
  • Device and stripping method for stripping polyimide copper-clad wire coating layer
  • Device and stripping method for stripping polyimide copper-clad wire coating layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Enameled wire diameter 0.15mm, coating thickness 0.01mm. Pour the paint stripping powder into an iron crucible, set the temperature at 200°C, heat until the paint stripping powder is completely melted, and keep it warm for 5 minutes. Pass the enameled wire through the collimator, insert it vertically into the molten liquid, the length of immersion in the liquid is 5mm, let it stand for 8s, and take it out. Rinse in deionized water for 5 seconds, take it out, and blow dry.

[0057] The paint remover 2 includes the following components in mass percent: 13% sodium hydroxide, 42% potassium hydroxide, 20% sodium acetate, and 25% sodium cellulose.

[0058] The surface of the copper core of the enameled wire after removing the coating layer in the embodiment of the present invention is bright and free of oxidation, the coating is completely removed without residue, the boundary is neat and there is no transition, the coating stripping length is 5 mm, and the schematic diagram...

Embodiment 2

[0060] The diameter of the enameled wire is 0.2mm, and the thickness of the coating is 0.015mm. Pour the paint stripping powder into an iron crucible, set the temperature at 210°C, heat until the paint stripping powder is completely melted, and keep it warm for 5 minutes. Pass the enameled wire through the collimator, insert it vertically into the molten liquid, and immerse it in the liquid to a length of 15 mm, let it stand for 10 seconds, and then take it out. Rinse in deionized water for 5 seconds, take it out, and blow dry.

[0061] The paint remover 2 includes the following components in mass percentage: 11% sodium hydroxide, 44% potassium hydroxide, 18% sodium acetate, and 27% sodium cellulose.

[0062] The surface of the copper core of the enameled wire after removing the coating layer in the embodiment of the present invention is bright and free of oxidation, the coating is completely removed without residue, the boundary is neat and there is no transition, and the coa...

Embodiment 3

[0064] The wire diameter of the enameled wire is 0.3mm, and the thickness of the coating is 0.02mm. Pour the paint stripping powder into an iron crucible, set the temperature at 210°C, heat until the paint stripping powder is completely melted, and keep it warm for 5 minutes. Pass the enameled wire through the collimator, insert it vertically into the molten liquid, and immerse it in the liquid for a length of 10 mm, let it stand for 12 seconds, and then take it out. Rinse in deionized water for 5 seconds, take it out, and blow dry.

[0065] The paint remover 2 includes the following components in mass percentage: 114% sodium hydroxide, 45% potassium hydroxide, 21% sodium acetate, and 20% sodium cellulose.

[0066] The surface of the copper core of the enameled wire after removing the coating layer in the embodiment of the present invention is bright and free from oxidation, the coating is completely removed without residue, the boundary is neat and there is no transition, and...

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Abstract

The invention relates to a device and a stripping method for stripping the coating layer of polyimide copper-clad wire. By designing a special stripping tool and preparing a paint stripping powder with a specific component content, the low melting point paint stripping powder is heated to Above the melting point, the paint stripping powder is melted into a liquid state, and the polyimide coating layer is quickly decomposed by the molten paint stripping powder. The molten paint stripping powder does not react with the copper core, does not damage the copper core, and realizes the polyimide coating Non-destructive stripping, at the same time, a threading device perpendicular to the liquid surface is used to guide the enameled wire to be inserted vertically into the molten liquid of paint stripping powder to ensure the neatness of the removal interface; the stripping device and stripping method of the present invention have the advantages of fast speed, no damage to the wire core and neat interface, etc. Advantages, it can be used for surface treatment of polyimide-coated enameled wires of precision electromechanical products such as precision instruments and precision motors before welding, so as to improve the reliability of welding.

Description

technical field [0001] The invention belongs to the technical field of surface treatment of polymer materials, and in particular relates to a device and a stripping method for quickly and non-damagingly stripping the coating layer of a polyimide copper-clad wire. Background technique [0002] Polyimide-coated enamelled copper wire is referred to as enameled wire for short. It has the advantages of high temperature resistance, good mechanical properties, and excellent insulation performance. It is widely used in high-tech industries such as aerospace, microelectronics, electrical, chemical, and energy technology. In actual use, enameled wires often need to be welded with other electronic components. In order to ensure the welding performance and contact reliability, the polyimide coating layer on the welding part of the enameled wire needs to be stripped before welding. For precision instruments with high reliability requirements, it is usually required that the wire core is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01R43/28C09D9/00
CPCC09D9/00H01R43/28
Inventor 邱增帅李彦博崔庆龙刘建梅严小军
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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