JPS54123922A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS54123922A JPS54123922A JP3137678A JP3137678A JPS54123922A JP S54123922 A JPS54123922 A JP S54123922A JP 3137678 A JP3137678 A JP 3137678A JP 3137678 A JP3137678 A JP 3137678A JP S54123922 A JPS54123922 A JP S54123922A
- Authority
- JP
- Japan
- Prior art keywords
- epoxy
- resin
- substrate
- liquid form
- 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.)
- Granted
Links
Landscapes
- Magnetic Record Carriers (AREA)
Abstract
PURPOSE: To improve abrasion resistance under high temperature and high pressure by using ultraviolet ray setting epoxy resins containing lubricants as a resin protection film in a magnetic recording medium comprising providing the resin protecting film on the ferromagnetic thin film formed on a substrate.
CONSTITUTION: The mixed varnish of epoxy prepolymer and epoxy monomer and a photo setting catalyst (aromatic diazonium salt of halogenide complex producing Lewis acid through radiation of ultraviolet rays) solution are mixed, to which fatty acid ester, quaternary ammonium salt, lubricants such as carbon powder or the like are added at ratios of about 0.01 to 50% based on the epoxy composition, whereby the liquid form composition is obtained. Next, the above liquid form composition is coated on the ferromagnetic material thin film formed on a substrate and ultraviolet rays are radiated thereto to allow the resin to set, thereby causing the protection film of about 0.5μ or under (preferably 0.01 to 0.1μ) to be formed.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3137678A JPS54123922A (en) | 1978-03-17 | 1978-03-17 | Magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3137678A JPS54123922A (en) | 1978-03-17 | 1978-03-17 | Magnetic recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54123922A true JPS54123922A (en) | 1979-09-26 |
JPS5749972B2 JPS5749972B2 (en) | 1982-10-25 |
Family
ID=12329524
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3137678A Granted JPS54123922A (en) | 1978-03-17 | 1978-03-17 | Magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54123922A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS578927A (en) * | 1980-06-17 | 1982-01-18 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
JPS57113422A (en) * | 1980-11-20 | 1982-07-14 | Verbatim Corp | Method of forming reinforcement around central hole of flexible recording disk |
JPS57150136A (en) * | 1981-03-09 | 1982-09-16 | Fuji Photo Film Co Ltd | Magnetic recording medium and its manufacture |
US4368239A (en) * | 1979-08-06 | 1983-01-11 | Sony Corporation | Magnetic recording medium |
US4404247A (en) * | 1982-07-02 | 1983-09-13 | Minnesota Mining And Manufacturing Company | Protective covering for magnetic recording medium |
US4537832A (en) * | 1982-12-25 | 1985-08-27 | Tdk Corporation | Magnetic recording medium |
JPS60167113A (en) * | 1984-02-10 | 1985-08-30 | Tdk Corp | Magnetic recording medium |
US4621008A (en) * | 1983-10-18 | 1986-11-04 | Tdk Corporation | Magnetic recording medium |
JPH03205632A (en) * | 1990-11-26 | 1991-09-09 | Sharp Corp | Magneto-optical recorder |
-
1978
- 1978-03-17 JP JP3137678A patent/JPS54123922A/en active Granted
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4368239A (en) * | 1979-08-06 | 1983-01-11 | Sony Corporation | Magnetic recording medium |
JPS578927A (en) * | 1980-06-17 | 1982-01-18 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
JPS57113422A (en) * | 1980-11-20 | 1982-07-14 | Verbatim Corp | Method of forming reinforcement around central hole of flexible recording disk |
JPS6343809B2 (en) * | 1980-11-20 | 1988-09-01 | Verbatim Corp | |
JPS57150136A (en) * | 1981-03-09 | 1982-09-16 | Fuji Photo Film Co Ltd | Magnetic recording medium and its manufacture |
US4404247A (en) * | 1982-07-02 | 1983-09-13 | Minnesota Mining And Manufacturing Company | Protective covering for magnetic recording medium |
US4537832A (en) * | 1982-12-25 | 1985-08-27 | Tdk Corporation | Magnetic recording medium |
US4621008A (en) * | 1983-10-18 | 1986-11-04 | Tdk Corporation | Magnetic recording medium |
JPS60167113A (en) * | 1984-02-10 | 1985-08-30 | Tdk Corp | Magnetic recording medium |
JPH03205632A (en) * | 1990-11-26 | 1991-09-09 | Sharp Corp | Magneto-optical recorder |
JPH0520818B2 (en) * | 1990-11-26 | 1993-03-22 | Sharp Kk |
Also Published As
Publication number | Publication date |
---|---|
JPS5749972B2 (en) | 1982-10-25 |
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