JPS5683842A - Base film for magnetic recording - Google Patents
Base film for magnetic recordingInfo
- Publication number
- JPS5683842A JPS5683842A JP16086179A JP16086179A JPS5683842A JP S5683842 A JPS5683842 A JP S5683842A JP 16086179 A JP16086179 A JP 16086179A JP 16086179 A JP16086179 A JP 16086179A JP S5683842 A JPS5683842 A JP S5683842A
- Authority
- JP
- Japan
- Prior art keywords
- film
- average height
- longitudinal
- surface protrusion
- magnetic recording
- 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
- Compositions Of Macromolecular Compounds (AREA)
- Magnetic Record Carriers (AREA)
Abstract
PURPOSE: To improve running, resistance to wear, and planeness of the film, by secifying strength for elongation in longitudinal and transversal directions, average height of surface protrusion, and the ratio of average height of surface protrusion to the incorporated particle average diameter.
CONSTITUTION: This base film for magnetic recording is the biaxial oriented polyester film where F-5 value (strength for 5% elongation) in longitudinal and transversal direction, the average height of surface protrusion, and the ratio of average height of surface protrusion to the incorporated particle average diameter of the incorporated particle are 9W15kg/mm2, ≤0.040μ, and ≤5.1×10-5 respectively Polyester incorporating corpuscles is melted and pressed out from a slit-form mouth piece to generate an nonoriented film, and next, this film is oriented in longitudinal and transversal directions and is orientated biaxially, and a calendar process is provided in the orientation process or after this process to press in surface protrusions of the film, and the surface state is adjusted, thereby producing this film.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16086179A JPS5683842A (en) | 1979-12-13 | 1979-12-13 | Base film for magnetic recording |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16086179A JPS5683842A (en) | 1979-12-13 | 1979-12-13 | Base film for magnetic recording |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58158107A Division JPS5982629A (en) | 1983-08-31 | 1983-08-31 | Base film for magnetic recording |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5683842A true JPS5683842A (en) | 1981-07-08 |
JPH0219525B2 JPH0219525B2 (en) | 1990-05-02 |
Family
ID=15723955
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16086179A Granted JPS5683842A (en) | 1979-12-13 | 1979-12-13 | Base film for magnetic recording |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5683842A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5919231A (en) * | 1982-07-26 | 1984-01-31 | Fuji Photo Film Co Ltd | Magnetic recording body |
JPS5975432A (en) * | 1982-10-22 | 1984-04-28 | Fuji Photo Film Co Ltd | Magnetic recording body |
-
1979
- 1979-12-13 JP JP16086179A patent/JPS5683842A/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5919231A (en) * | 1982-07-26 | 1984-01-31 | Fuji Photo Film Co Ltd | Magnetic recording body |
JPH0479058B2 (en) * | 1982-07-26 | 1992-12-14 | Fuji Photo Film Co Ltd | |
JPS5975432A (en) * | 1982-10-22 | 1984-04-28 | Fuji Photo Film Co Ltd | Magnetic recording body |
JPH0479059B2 (en) * | 1982-10-22 | 1992-12-14 | Fuji Photo Film Co Ltd |
Also Published As
Publication number | Publication date |
---|---|
JPH0219525B2 (en) | 1990-05-02 |
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