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A method for detecting corona resistance of polyimide composite film material

A technology of composite film and polyimide, applied in the field of materials

Active Publication Date: 2020-11-13
NANJING ZHONGHONG RUNNING ADVANCED MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still no scientific method for evaluating the corona resistance performance of polyimide composite film materials.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The present invention is further described below.

[0019] The polyimide composite film material corona resistance detection method comprises the following steps:

[0020] (1) Before the test, the polyimide film standard product not doped with other materials and the polyimide composite film doped with other materials with excellent corona resistance were used as standard products for testing, and the results of the two standard products were obtained. A value, and compare the test result with the standard product as the standard for judging the corona resistance performance;

[0021] Tested:

[0022] A=0.25×10000 / 600+0.25×3000 / 180+0.5×2000 / 1600×10=14.584 of a commercially available polyimide film standard product not doped with other materials

[0023] A=0.25×8000 / 480+0.25×2500 / 150+0.5×2100 / 1800×10=14.164 of a batch of polyimide composite film doped with other materials prepared in the laboratory

[0024] (2) Connect the surface of the polyimide composite film mater...

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Abstract

A method for detecting the corona resistance performance of a polyimide composite film material provided by the invention comprises the following steps: connecting the surface of the polyimide composite film material sample to be tested to a metal plate electrode and setting a surface potentiometer, and In the detection container, vacuumize; apply a 2-5kV DC voltage to the two pole plates of the polyimide composite film material sample to be tested and carry out corona charging for 3min. After charging, use a surface potentiometer to measure the surface potential v of the sample with time t Change value; when the surface potential is zero, continue to apply a 0‑10V DC voltage to the two pole plates of the polyimide composite film material sample to be tested, and start to increase the voltage value at a certain rate until the polyimide composite film material to be tested The surface of the sample is broken down, record the breakdown voltage v2 and the moment t2, and calculate the corona resistance performance of the polyimide composite film material. The method for detecting the corona resistance performance of the composite film material provided by the invention has objective test results and scientific evaluation.

Description

technical field [0001] The invention relates to the field of materials, in particular to a method for detecting the corona resistance performance of a polyimide composite thin film material. Background technique [0002] Polyimide refers to a class of polymers containing imide rings (-CO-NH-CO-) on the main chain, among which polymers containing phthalimide structures are the most important. Polyimide is one of the organic polymer materials with the best comprehensive performance. It has the advantages of high temperature resistance, low dielectric constant, and corrosion resistance. Its high temperature resistance can reach above 400 ° C, and the long-term use temperature range is -200 ~ 300 ° C , has high insulating properties. [0003] Corona-resistant polyimide (PI) film is a heterocyclic polymer material characterized by imide ring structure. It has excellent mechanical properties, electrical properties, heat resistance and radiation resistance at 200~400 °C. , is a k...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
CPCG01R31/1263
Inventor 徐勇陈坚汤学妹
Owner NANJING ZHONGHONG RUNNING ADVANCED MATERIAL TECH CO LTD