JPS6484432A - Magnetic disk - Google Patents
Magnetic diskInfo
- Publication number
- JPS6484432A JPS6484432A JP24041387A JP24041387A JPS6484432A JP S6484432 A JPS6484432 A JP S6484432A JP 24041387 A JP24041387 A JP 24041387A JP 24041387 A JP24041387 A JP 24041387A JP S6484432 A JPS6484432 A JP S6484432A
- Authority
- JP
- Japan
- Prior art keywords
- fatty acid
- surface area
- specific surface
- magnetic
- carbon black
- 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
Abstract
PURPOSE:To improve electromagnetic conversion characteristics and traveling durability by dispersing magnetic powder having a specific surface area, carbon black having a specific surface area and oil absorption, polishing agent having specific hardness and particle size and lubricating agent contg. specific fatty acid and fatty acid ester into a magnetic layer. CONSTITUTION:The magnetic layer formed by dispersing the magnetic powder, the carbon black, the polishing agent and the lubricating agent into a resin binder is formed on the surface of a magnetic disk. Ferromagnetic metal powder having >=40m<2>/g specific surface area is used for this magnetic powder. The carbon black which has 15-80m<2>/g specific surface area and has the oil absorption in a 110-200ml/(100g) range in DBP value is used. Furthermore, the polishing agent having >= 6 Mohs' hardness and <=1mum average particle size is used. The lubricating agent contg. the fatty acid of >=12C and the fatty acid ester derived from said fatty acid and the branched alcohol of 3-18C is used. The magnetic disk having the high electromagnetic conversion characteristics and traveling durability is thus obtd.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24041387A JPS6484432A (en) | 1987-09-25 | 1987-09-25 | Magnetic disk |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24041387A JPS6484432A (en) | 1987-09-25 | 1987-09-25 | Magnetic disk |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6484432A true JPS6484432A (en) | 1989-03-29 |
Family
ID=17059102
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24041387A Pending JPS6484432A (en) | 1987-09-25 | 1987-09-25 | Magnetic disk |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6484432A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02189712A (en) * | 1989-01-18 | 1990-07-25 | Kao Corp | Magnetic recording medium |
WO2001001402A1 (en) * | 1999-06-28 | 2001-01-04 | Teijin Limited | Magnetic recording medium |
-
1987
- 1987-09-25 JP JP24041387A patent/JPS6484432A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02189712A (en) * | 1989-01-18 | 1990-07-25 | Kao Corp | Magnetic recording medium |
WO2001001402A1 (en) * | 1999-06-28 | 2001-01-04 | Teijin Limited | Magnetic recording medium |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
HK107091A (en) | Smooth,low-friction,magnetic recording medium | |
CA2111056A1 (en) | Low sediment process for forming borated dispersant | |
JPS57162128A (en) | Magnetic recording body | |
JPS57133521A (en) | Magnetic recording medium | |
JPS5414711A (en) | Magnetic recording medium | |
JPS5675659A (en) | Carrier material | |
JPS6413225A (en) | Magnetic recording medium | |
JPS6484432A (en) | Magnetic disk | |
DE3780036D1 (en) | MAGNETIC CARRIER PARTICLES. | |
EP0305819A3 (en) | Ferromagnetic metal powder and process for preparation thereof | |
JPS57200934A (en) | Magnetic recording medium | |
JPS6484431A (en) | Magnetic disk | |
JPS6427022A (en) | Magnetic recording medium and its production | |
JPS57135428A (en) | Magnetic recording medium | |
JPS5517816A (en) | Magnetic recording media | |
JPS5763804A (en) | Magnetic recording medium | |
JPS5517835A (en) | Magnetic recording media | |
JPS6484430A (en) | Magnetic disk | |
JPS557862A (en) | Solid or semisolid polishing agent | |
JPS5778631A (en) | Magnetic recording medium | |
JPS649469A (en) | Carrier for developing electrostatic charge image and manufacture of same | |
JPS544940A (en) | Friction material | |
JPS6484414A (en) | Disk-shaped magnetic recording medium | |
JPS57106526A (en) | Manufacture of needlelike fine particle of iron oxyhydroxide | |
JPS5517813A (en) | Magnetic recording media |