JPS6451460A - Sheetlike object - Google Patents
Sheetlike objectInfo
- Publication number
- JPS6451460A JPS6451460A JP20829887A JP20829887A JPS6451460A JP S6451460 A JPS6451460 A JP S6451460A JP 20829887 A JP20829887 A JP 20829887A JP 20829887 A JP20829887 A JP 20829887A JP S6451460 A JPS6451460 A JP S6451460A
- Authority
- JP
- Japan
- Prior art keywords
- aromatic
- mica particles
- sheetlike
- mica
- ashed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Organic Insulating Materials (AREA)
Abstract
PURPOSE:To obtain a sheetlike object improved in reliability and suited as an electrical insulation material used under severe conditions of high temperature and high voltage, by incorporating an aromatic polymer and specified calcined mica particles in a sheetlike material. CONSTITUTION:A sheetlike object containing an aromatic polymer and mica particles. Said mica particles are those characterized in that the particle diameter of an ashed ceramic formed after calcining at 800 deg.C for 1hr is 1-50mu, and the content of the ashed ceramic is 7ppm or below based on the sheetlike material. Examples of the aromatic polymers used include aromatic polyamides, aromatic polyimides, and aromatic polyazoles. In order to obtain said mica particles, it is necessary that the purity of mica particles be increased to a value higher than the conventional. In order to purity mica, purification is performed in several stages by using a sedimentation tank, a classifier, etc.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20829887A JPS6451460A (en) | 1987-08-24 | 1987-08-24 | Sheetlike object |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20829887A JPS6451460A (en) | 1987-08-24 | 1987-08-24 | Sheetlike object |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6451460A true JPS6451460A (en) | 1989-02-27 |
JPH0531897B2 JPH0531897B2 (en) | 1993-05-13 |
Family
ID=16553933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20829887A Granted JPS6451460A (en) | 1987-08-24 | 1987-08-24 | Sheetlike object |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6451460A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0483621A2 (en) * | 1990-11-02 | 1992-05-06 | Watlow Electric Manufacturing Company | Heater assembly, especially in form of a band or strip |
EP0553831A2 (en) * | 1992-01-29 | 1993-08-04 | Ebara Corporation | Thermotropic liquid crystal polymer composition and insulator |
-
1987
- 1987-08-24 JP JP20829887A patent/JPS6451460A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0483621A2 (en) * | 1990-11-02 | 1992-05-06 | Watlow Electric Manufacturing Company | Heater assembly, especially in form of a band or strip |
EP0553831A2 (en) * | 1992-01-29 | 1993-08-04 | Ebara Corporation | Thermotropic liquid crystal polymer composition and insulator |
Also Published As
Publication number | Publication date |
---|---|
JPH0531897B2 (en) | 1993-05-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |