JPS5761067A - Production of magnetic paint - Google Patents
Production of magnetic paintInfo
- Publication number
- JPS5761067A JPS5761067A JP13720080A JP13720080A JPS5761067A JP S5761067 A JPS5761067 A JP S5761067A JP 13720080 A JP13720080 A JP 13720080A JP 13720080 A JP13720080 A JP 13720080A JP S5761067 A JPS5761067 A JP S5761067A
- Authority
- JP
- Japan
- Prior art keywords
- abrasive
- magnetic
- magnetic paint
- production
- binder
- 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
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
PURPOSE: To obtain a magnetic paint which can form a magnetic tape having excellent squareness ratio and coercive force without damaging the needle likeness of a magnetic powder, by blending an abrasive as a component of the magnetic paint, by post-addition in the production of the magnetic paint.
CONSTITUTION: In the production of a magnetic paint by using a polyurethanenitrocellulose binder, a magnetic powder, a binder such as nitrocellulose, and additives (except an abrasive) such as a lubricant, a plasticizer and a crosslinking agent are firstly stirred in a solvent to carry out primary dispersion. Then another binder such as polyurethane is added, and the mixture is stirred to carry out secondary dispersion. Finally, an abrasive is added, mixed and dispersed to form a magnetic paint. As said abrasive, alumina or silicon carbide having an average particle size of 0.05W3μ is used. The abrasive is used in an amount of 0.1W10pts.wt. per 100pts.wt. magnetic powder.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13720080A JPS5761067A (en) | 1980-09-30 | 1980-09-30 | Production of magnetic paint |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13720080A JPS5761067A (en) | 1980-09-30 | 1980-09-30 | Production of magnetic paint |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5761067A true JPS5761067A (en) | 1982-04-13 |
Family
ID=15193124
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13720080A Pending JPS5761067A (en) | 1980-09-30 | 1980-09-30 | Production of magnetic paint |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5761067A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2238648A (en) * | 1989-11-10 | 1991-06-05 | Tdk Corp | Magnetic tape cartridge |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52151898A (en) * | 1976-06-11 | 1977-12-16 | Hitachi Ltd | Manufacturing method of magnetic paint |
JPS5572305A (en) * | 1978-11-28 | 1980-05-31 | Teijin Ltd | Electrical insulator |
-
1980
- 1980-09-30 JP JP13720080A patent/JPS5761067A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52151898A (en) * | 1976-06-11 | 1977-12-16 | Hitachi Ltd | Manufacturing method of magnetic paint |
JPS5572305A (en) * | 1978-11-28 | 1980-05-31 | Teijin Ltd | Electrical insulator |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2238648A (en) * | 1989-11-10 | 1991-06-05 | Tdk Corp | Magnetic tape cartridge |
US5172288A (en) * | 1989-11-10 | 1992-12-15 | Tdk Corporation | Magnetic recording medium and a tape guide in a cartridge |
GB2238648B (en) * | 1989-11-10 | 1994-08-10 | Tdk Corp | Magnetic tape cartridge |
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