Polyimide film surface charge characteristic analysis method

A polyimide film, surface charge technology, applied in the direction of material analysis, analysis materials, measuring devices, etc. by electromagnetic means

Active Publication Date: 2016-10-12
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a method for analyzing the surface charge characteristics of polyimide films for the problem of how to accurately measure and properly process the obtained data to evaluate the characteristics of polyimide film surface charge accumulation and dissipation capabilities

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  • Polyimide film surface charge characteristic analysis method
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Embodiment Construction

[0028] In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the related drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one...

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Abstract

The invention relates to a polyimide film surface charge characteristic analysis method. The polyimide film surface charge characteristic analysis method includes the following steps that corona charging is conducted on a polyimide film sample; the polyimide film sample subjected to corona charging is rapidly detected, a change value of surface potential of the polyimide film sample with time is detected, data V(t) are recorded, wherein the V represents the surface potential, and t represents time; the relation about the product of the time with a derivative of the V(t) to the time and the time is obtained, namely tdV(t) / dt-logt; a curve corresponding to the tdV(t) / dt-logt is made, and characteristics of surface charge accumulation and dissipating capability of a polyimide film are evaluated according to the state of the curve. The method and a device do not need destroy the polyimide film, can achieve nondestructive detection, the operating process is simple and convenient, and the situations of the surface charge accumulation and dissipating capability of the sample can be visually, accurately and effectively evaluated.

Description

technical field [0001] The invention relates to a method for analyzing the surface charge characteristics of a film, in particular to a method for analyzing the surface charge characteristics of a polyimide film. Background technique [0002] Polyimide is a typical representative of organic polymer materials with good comprehensive properties. It has outstanding high and low temperature resistance, high temperature resistance above 400 ℃, and low temperature performance is also very good. . The material has no obvious melting point, and its insulating properties are particularly outstanding. The dielectric constant is 4.0 at a frequency of 103 Hz, and the dielectric loss is only 0.004 to 0.007. It belongs to the class F to H insulating material. Polyimide, a special engineering plastic, is a heat-resistant resin developed in the 1950s under the background of the US and the former Soviet Union's arms race and space development. Mass production began in 1955 and is recognized...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G01N27/60
CPCG01N27/60
Inventor傅明利侯帅田野卓然惠宝军杜伯学李进侯兆豪韩涛
OwnerELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD