JPS6439622A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS6439622A JPS6439622A JP19522087A JP19522087A JPS6439622A JP S6439622 A JPS6439622 A JP S6439622A JP 19522087 A JP19522087 A JP 19522087A JP 19522087 A JP19522087 A JP 19522087A JP S6439622 A JPS6439622 A JP S6439622A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic layer
- recording medium
- young
- modulus
- surface roughness
- 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 stability with age and durability by incorporating a polycarbonate polyurethane resin into a magnetic layer, specifying the Young's modulus thereof within a specific range and confining the surface roughness to <=0.05mum. CONSTITUTION:This magnetic recording medium is constituted by providing the magnetic layer dispersed with fine ferromagnetic powder in a binder on a nonmagnetic base. The polycarbonate polyurethane resin is incorporated at 30-60pts.wt. into this magnetic layer, a vinyl chloride/vinyl acetate resin at 15-35pts.wt. and polyisocyanate at 20-40pts.wt., by which the Young's modulus of the magnetic layer is kept within the 2X10<4>-50X10<4>kg/cm<2> range at -10-60 deg.C. The surface roughness is confined to the smoothness of <=0.05mum (0.25mm cut off value). The output is thereby improved and the self-adhesive strength at and under a high temp. and high humidity, coefft. of friction, powder dislodgment and still durability are simultaneously improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19522087A JPS6439622A (en) | 1987-08-06 | 1987-08-06 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19522087A JPS6439622A (en) | 1987-08-06 | 1987-08-06 | Magnetic recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6439622A true JPS6439622A (en) | 1989-02-09 |
Family
ID=16337463
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19522087A Pending JPS6439622A (en) | 1987-08-06 | 1987-08-06 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6439622A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS619830A (en) * | 1984-06-25 | 1986-01-17 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
JPS61222027A (en) * | 1985-03-27 | 1986-10-02 | Fuji Photo Film Co Ltd | Magnetic recording medium |
-
1987
- 1987-08-06 JP JP19522087A patent/JPS6439622A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS619830A (en) * | 1984-06-25 | 1986-01-17 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
JPS61222027A (en) * | 1985-03-27 | 1986-10-02 | Fuji Photo Film Co Ltd | Magnetic recording medium |
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