JPS6439623A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS6439623A JPS6439623A JP19522187A JP19522187A JPS6439623A JP S6439623 A JPS6439623 A JP S6439623A JP 19522187 A JP19522187 A JP 19522187A JP 19522187 A JP19522187 A JP 19522187A JP S6439623 A JPS6439623 A JP S6439623A
- Authority
- JP
- Japan
- Prior art keywords
- polycarbonate polyurethane
- magnetic layer
- powder
- phenoxy resin
- recording medium
- 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
- Magnetic Record Carriers (AREA)
- Paints Or Removers (AREA)
Abstract
PURPOSE:To improve durability by dispersing fine ferromagnetic powder into a binder consisting of polycarbonate polyurethane and phenoxy resin, thereby forming a magnetic layer. CONSTITUTION:The magnetic layer of a magnetic recording medium constituted by providing the magnetic layer dispersed with the fine ferromagnetic powder in a binder on a nonmagnetic base is formed by dispersing the fine ferromagnetic powder into the binder consisting of the polycarbonate polyurethane which is low in Young's modulus but is elongatable and the phenoxy resin which is brittle but is hard and durable. Namely, the polycarbonate polyurethane and the phenoxy resin are incorporated in a 1.5:1-5:1 range by weight into the magnetic layer. Powder dislodgment increases and still durability is degraded if the content by weight of the polycarbonate polyurethane is <=1.5. The powder dislodgment and still durability are similarly degraded if the content of the polycarbonate polyurethane is >=5.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19522187A JPS6439623A (en) | 1987-08-06 | 1987-08-06 | Magnetic recording medium |
US07/229,411 US4970121A (en) | 1987-08-06 | 1988-08-08 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19522187A JPS6439623A (en) | 1987-08-06 | 1987-08-06 | Magnetic recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6439623A true JPS6439623A (en) | 1989-02-09 |
Family
ID=16337480
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19522187A Pending JPS6439623A (en) | 1987-08-06 | 1987-08-06 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6439623A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6126041A (en) * | 1984-07-16 | 1986-02-05 | Mitsubishi Paper Mills Ltd | Silver halide photographic emulsion |
JPS623421A (en) * | 1985-06-28 | 1987-01-09 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
JPS62195719A (en) * | 1986-02-21 | 1987-08-28 | Konishiroku Photo Ind Co Ltd | Durable magnetic recording medium |
-
1987
- 1987-08-06 JP JP19522187A patent/JPS6439623A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6126041A (en) * | 1984-07-16 | 1986-02-05 | Mitsubishi Paper Mills Ltd | Silver halide photographic emulsion |
JPS623421A (en) * | 1985-06-28 | 1987-01-09 | Konishiroku Photo Ind Co Ltd | Magnetic recording medium |
JPS62195719A (en) * | 1986-02-21 | 1987-08-28 | Konishiroku Photo Ind Co Ltd | Durable magnetic recording medium |
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