JPS54132799A - Manufacturing method of heat-resistant electric insulator - Google Patents
Manufacturing method of heat-resistant electric insulatorInfo
- Publication number
- JPS54132799A JPS54132799A JP4088478A JP4088478A JPS54132799A JP S54132799 A JPS54132799 A JP S54132799A JP 4088478 A JP4088478 A JP 4088478A JP 4088478 A JP4088478 A JP 4088478A JP S54132799 A JPS54132799 A JP S54132799A
- Authority
- JP
- Japan
- Prior art keywords
- boric acid
- zinc oxide
- electric insulator
- basic material
- heated
- 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.)
- Pending
Links
Landscapes
- Inorganic Insulating Materials (AREA)
Abstract
PURPOSE: To obtain an insulator having excellent heat-resistance and no blowing, by spraying a binder composed of boric acid and zinc oxide on a insulative basic material then after performing thermal processing pressure molding under specific condition.
CONSTITUTION: A plurality of insulative basic materials (for example, glass fiber cloth, ceramic fiber cloth, asbestos cloth, rock wool cloth, etc.) sprayed with a binder composed of a powder mixed with boric acid and zinc oxide are laminated. Wt% of boric acid and zinc oxide are 80W30, 20W70, while wt% of basic material and the binder are 30W70, 70W30. The said laminated basic material is heated more than three hours under 140W175°C and again heated more than 1 hour under 180W200°C to bring the positive boric acid to anydrous boric acid. Then it is heated under 300W350°C and molded with pressure of 100W300kg/cm2 to produce an electric insulator. When aging said electric insulator more than two hours under 300°C the water-proof performance is further improved.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4088478A JPS54132799A (en) | 1978-04-06 | 1978-04-06 | Manufacturing method of heat-resistant electric insulator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4088478A JPS54132799A (en) | 1978-04-06 | 1978-04-06 | Manufacturing method of heat-resistant electric insulator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54132799A true JPS54132799A (en) | 1979-10-16 |
Family
ID=12592930
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4088478A Pending JPS54132799A (en) | 1978-04-06 | 1978-04-06 | Manufacturing method of heat-resistant electric insulator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54132799A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5256486A (en) * | 1990-07-19 | 1993-10-26 | Rhone-Poulenc Chimie | Heat-vulcanizable organopolysiloxane compositions and protective sheathing of electrical conductors therewith |
JP2007325376A (en) * | 2006-05-31 | 2007-12-13 | Mirai Ind Co Ltd | Box cover |
-
1978
- 1978-04-06 JP JP4088478A patent/JPS54132799A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5256486A (en) * | 1990-07-19 | 1993-10-26 | Rhone-Poulenc Chimie | Heat-vulcanizable organopolysiloxane compositions and protective sheathing of electrical conductors therewith |
JP2007325376A (en) * | 2006-05-31 | 2007-12-13 | Mirai Ind Co Ltd | Box cover |
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