JPS5562530A - Non-expanding and contracting hard smooth magnetic medium - Google Patents
Non-expanding and contracting hard smooth magnetic mediumInfo
- Publication number
- JPS5562530A JPS5562530A JP13446778A JP13446778A JPS5562530A JP S5562530 A JPS5562530 A JP S5562530A JP 13446778 A JP13446778 A JP 13446778A JP 13446778 A JP13446778 A JP 13446778A JP S5562530 A JPS5562530 A JP S5562530A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- foams
- sheets
- magnetic medium
- orthogonal
- 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
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Magnetic Record Carriers (AREA)
- Hard Magnetic Materials (AREA)
Abstract
PURPOSE: To obtain a non-expanding and contracting smooth magnetic medium of a large hardness by extending a sheet of air-foamed polypropylene, etc., and laminating sheets so that the extending direction may be orthogonal mutually and forming a magnetic coating layer on these sheets through a specific coating layer.
CONSTITUTION: A sheet of air-foamed polypropylene, etc., is extended in one direction, and sheets where foams are extended into an oval are laminated in three layers so that extending directions may be orthogonal mutually, for example, foams 17 and 16 of sheets 5 and 7 may be in the extending direction and foam 12 of sheet 6 may be have an extending direction orthogonal to foams 17 and 16. Coating layer 4 with one smooth face is formed on this three-layer carrier so that concave 8 in the polypropylene layer 5 side may be anchored with convex part 19 of layer 4, and magnetic layer 3 is provided on layer 4. Thus, the carrier increases its hardness and has a non-expansion and contraction property because foams 17, 12 and 16 are orthogonal to one another, so that a magnetic medium of good characteristic such as S/N ratio can be obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13446778A JPS5562530A (en) | 1978-11-02 | 1978-11-02 | Non-expanding and contracting hard smooth magnetic medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13446778A JPS5562530A (en) | 1978-11-02 | 1978-11-02 | Non-expanding and contracting hard smooth magnetic medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5562530A true JPS5562530A (en) | 1980-05-12 |
Family
ID=15128996
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13446778A Pending JPS5562530A (en) | 1978-11-02 | 1978-11-02 | Non-expanding and contracting hard smooth magnetic medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5562530A (en) |
-
1978
- 1978-11-02 JP JP13446778A patent/JPS5562530A/en active Pending
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