Corona-resistant polyimide film material and preparation method thereof

A polyimide film and polyimide resin technology, which is applied in the field of polyimide-containing film materials, can solve the problems of inability to meet mass production needs, many production processes, and limited production efficiency.

Active Publication Date: 2013-04-10
RAYITEK HI TECH FILM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the current vacuum plating and sputtering plating equipment are only suitable for sheet or narrow-width, intermittent production, the production speed

Method used

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  • Corona-resistant polyimide film material and preparation method thereof
  • Corona-resistant polyimide film material and preparation method thereof
  • Corona-resistant polyimide film material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Pyromellitic dianhydride and 4.4' diaminodiphenyl ether were reacted in dimethylacetamide at a molar ratio of 0.99:1 to prepare 100 kg of polyamic acid resin solution with a viscosity of 100,000 centipoise and a solid content of 20 %.

[0072] Add 2.8kg of 30nm silica, 4.5kg of ethanol, and 0.056kg of aminopropyltriethoxysilane into 2.644kg of dimethylacetamide, and disperse with high-speed stirring at 3000 rpm to prepare 10kg of slurry ①.

[0073] Add 2.4kg of 400nm alumina, 4.5kg of ethanol, and 0.048kg of aminopropyltriethoxysilane into 3.052kg of dimethylacetamide, and disperse with high-speed stirring at 3000 rpm to prepare 10kg of slurry②.

[0074] Add the slurries ① and ② into the prepared polyamic acid resin solution, and stir for 5 hours at 100 rpm. The obtained polyamic acid mixed resin is transported to the salivating die head through the pipeline, and then passes through the endless steel belt and is removed by the solvent. , to obtain a polyimide salivatio...

Embodiment 2

[0124] Pyromellitic dianhydride and 4.4' diaminodiphenyl ether were reacted in dimethylacetamide at a molar ratio of 0.99:1 to prepare 100 kg of polyamic acid resin solution with a viscosity of 100,000 centipoise and a solid content of 20 %.

[0125] Add 2.8kg of 30nm silica, 4.5kg of 2-pentanone, and 0.056kg of aminopropyltriethoxysilane into 2.644kg of dimethylacetamide, and disperse with high-speed stirring at 3000 rpm to prepare 10kg of slurry ①.

[0126] Add 2.4kg of 400nm alumina, 4.5kg of 2-pentanone, and 0.048kg of aminopropyltriethoxysilane into 3.052kg of dimethylacetamide, and disperse with high-speed stirring at 3000 rpm to prepare 10kg of slurry②.

[0127] Add the slurries ① and ② into the prepared polyamic acid resin solution, and stir for 5 hours at 100 rpm. The obtained polyamic acid mixed resin is transported to the salivating die head through the pipeline, and then passes through the endless steel belt and is removed by the solvent. , to obtain a polyimide s...

Embodiment 3

[0134] Pyromellitic dianhydride and 4.4' diaminodiphenyl ether were reacted in dimethylacetamide at a molar ratio of 0.99:1 to prepare 100 kg of polyamic acid resin solution with a viscosity of 100,000 centipoise and a solid content of 20 %.

[0135] Add 2.8kg of 30nm silica, 4.5kg of ethanol, and 0.056kg of isopropoxytricarboxylic acyl titanate into 2.644kg of dimethylacetamide, and disperse with high-speed stirring at 3000 rpm to prepare 10kg of slurry①.

[0136] Add 2.4kg of 400nm alumina, 4.5kg of ethanol, and 0.048kg of isopropoxytricarboxylic acyl titanate into 3.052kg of dimethylacetamide, and disperse with high-speed stirring at 3000 rpm to prepare 10kg of slurry②.

[0137] Add the slurries ① and ② into the prepared polyamic acid resin solution, and stir for 5 hours at 100 rpm. The obtained polyamic acid mixed resin is transported to the salivating die head through the pipeline, and then passes through the endless steel belt and is removed by the solvent. , to obtain ...

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Abstract

The invention relates to a corona-resistant polyimide film with a double-layer structure, and a preparation method thereof. The corona-resistant polyimide film material comprises a film layer A and a film layer B, wherein the film layer A serves as the main body structure of the polyimide film material and comprises polyimide resin and inorganic filler filled in the polyimide resin; the thickness of the film layer A accounts for 90 to 99.9 percent of the total thickness of the material; the film layer B comprises polyimide resin and inorganic filler filled in the polyimide resin; the thickness of the film layer B accounts for 0.1 to 10 percent of the total thickness of the material; the content of inorganic filler A; the film layer A and the film layer B are integrally formed; and no obvious boundary exists between the film layer A and the film layer B. The film with the structure has excellent physical and electrical properties and also has excellent corona resistance.

Description

technical field [0001] The invention belongs to the field of macromolecular polymer materials, and in particular relates to a film material containing polyimide. [0002] The invention also relates to a process for its preparation. Background technique [0003] In recent years, with the rapid construction of China's high-speed railways and the continuous increase in the installed capacity of wind turbines, the use of high-power variable frequency motors has become very common. At the same time, more stringent requirements are put forward for the reliability of various frequency conversion motors in long-term operation. However, when the variable frequency motor is working, the internal winding group is often impacted by high-frequency pulse voltage. The distribution of this high-frequency pulse voltage on the winding group is uneven, resulting in a difference of several turns in the winding group. Ten times, so that during the operation of the variable frequency motor, cor...

Claims

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Application Information

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IPC IPC(8): B32B27/28B32B27/18B32B37/15
Inventor 袁舜齐何志斌汤昌丹徐飞
Owner RAYITEK HI TECH FILM CO LTD
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