JPS6489024A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS6489024A JPS6489024A JP24414387A JP24414387A JPS6489024A JP S6489024 A JPS6489024 A JP S6489024A JP 24414387 A JP24414387 A JP 24414387A JP 24414387 A JP24414387 A JP 24414387A JP S6489024 A JPS6489024 A JP S6489024A
- Authority
- JP
- Japan
- Prior art keywords
- binder
- ferromagnetic material
- magnetic layer
- grain size
- average grain
- 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
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
PURPOSE:To improve dispersibility and output as well as traveling durability by incorporating two kinds of carbon blacks having specific grain sizes with respect to the average grain size (a) of a ferromagnetic material into a binder. CONSTITUTION:Two kinds of the carbon blacks having >=2/5a and below (a) average grain size and above (a) and below 10a with respect to the average grain size (a) of the ferromagnetic material are incorporated into the binder of the magnetic recording medium formed by providing a magnetic layer disposed with the ferromagnetic material which is hexagonal planar shape and has an axis of easy magnetization in the direction perpendicular to the flat plate face into the binder on a nonmagnetic base. The carbon having the particle sizes above 2/5a and below (a) wedges as nonmagnetic powder between the hexagonal ferrite particles to prevent the flocculation of the hexagonal ferrite. On the other hand, the carbon black having the large particle sizes above (a) and below 10a exists in the form of projections as the large nonmagnetic particles in the magnetic layer and contributes to a decrease in the mu value of the magnetic layer and the improvement in durability. The dispersibility and the output as well as the traveling durability are thereby improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62244143A JPH0682458B2 (en) | 1987-09-30 | 1987-09-30 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62244143A JPH0682458B2 (en) | 1987-09-30 | 1987-09-30 | Magnetic recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6489024A true JPS6489024A (en) | 1989-04-03 |
JPH0682458B2 JPH0682458B2 (en) | 1994-10-19 |
Family
ID=17114400
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62244143A Expired - Lifetime JPH0682458B2 (en) | 1987-09-30 | 1987-09-30 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0682458B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03100917A (en) * | 1989-09-12 | 1991-04-25 | Kao Corp | Magnetic recording medium |
JPH04298819A (en) * | 1991-03-27 | 1992-10-22 | Fuji Photo Film Co Ltd | Magnetic recording medium and reproduction thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63306519A (en) * | 1987-06-08 | 1988-12-14 | Toshiba Corp | Magnetic recording medium |
-
1987
- 1987-09-30 JP JP62244143A patent/JPH0682458B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63306519A (en) * | 1987-06-08 | 1988-12-14 | Toshiba Corp | Magnetic recording medium |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03100917A (en) * | 1989-09-12 | 1991-04-25 | Kao Corp | Magnetic recording medium |
JPH04298819A (en) * | 1991-03-27 | 1992-10-22 | Fuji Photo Film Co Ltd | Magnetic recording medium and reproduction thereof |
Also Published As
Publication number | Publication date |
---|---|
JPH0682458B2 (en) | 1994-10-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
EXPY | Cancellation because of completion of term |