JPS5634145A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS5634145A JPS5634145A JP10830979A JP10830979A JPS5634145A JP S5634145 A JPS5634145 A JP S5634145A JP 10830979 A JP10830979 A JP 10830979A JP 10830979 A JP10830979 A JP 10830979A JP S5634145 A JPS5634145 A JP S5634145A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- layer
- film layer
- coating film
- frequency band
- 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 improve the magnetic characteristics through two-layer construction of magnetic substance layer and to obtain high maximum output at low frequency band, by forming the magnetic coating film layer taking the cobalt as the main component on the substrate and forming the ferromagnetic metal thin layer.
CONSTITUTION: On the substrate such as polyester film, the magnetic paint preparing the metal magnetic powder of cobalt including a little amount of nickel and chromium and polyvinyl butyral resin, is coated and the magnetic coating film layer of a given thickness is formed with drying. Next, on this magnetic coating film layer, the specified ferromagnetic metal thin film layer is formed. Thus, the magnetic characteristics are improved by taking the magnetic layer as the two-layer architecture, and the maximum output at a low frequency band, e.g., 333W1,250Hz can further be improved, allowing to use for audio magnetic tape.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10830979A JPS5634145A (en) | 1979-08-25 | 1979-08-25 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10830979A JPS5634145A (en) | 1979-08-25 | 1979-08-25 | Magnetic recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5634145A true JPS5634145A (en) | 1981-04-06 |
Family
ID=14481431
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10830979A Pending JPS5634145A (en) | 1979-08-25 | 1979-08-25 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5634145A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4409281A (en) * | 1980-04-21 | 1983-10-11 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
JPS59207024A (en) * | 1983-05-10 | 1984-11-24 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
JPS63152020A (en) * | 1986-12-16 | 1988-06-24 | Fuji Photo Film Co Ltd | Magnetic recording medium |
US5057299A (en) * | 1989-12-08 | 1991-10-15 | Minnesota Mining And Manufacturing Company | Method for making beta cobaltous hydroxide |
-
1979
- 1979-08-25 JP JP10830979A patent/JPS5634145A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4409281A (en) * | 1980-04-21 | 1983-10-11 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
JPS59207024A (en) * | 1983-05-10 | 1984-11-24 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
JPS6322366B2 (en) * | 1983-05-10 | 1988-05-11 | Konika Kk | |
JPS63152020A (en) * | 1986-12-16 | 1988-06-24 | Fuji Photo Film Co Ltd | Magnetic recording medium |
US5057299A (en) * | 1989-12-08 | 1991-10-15 | Minnesota Mining And Manufacturing Company | Method for making beta cobaltous hydroxide |
US5338473A (en) * | 1989-12-08 | 1994-08-16 | Minnesota Mining And Manufacturing Company | Aqueous beta cobaltous hydroxide and method for making |
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