JPS5584035A - Manufacture of magnetic recording medium - Google Patents
Manufacture of magnetic recording mediumInfo
- Publication number
- JPS5584035A JPS5584035A JP15957178A JP15957178A JPS5584035A JP S5584035 A JPS5584035 A JP S5584035A JP 15957178 A JP15957178 A JP 15957178A JP 15957178 A JP15957178 A JP 15957178A JP S5584035 A JPS5584035 A JP S5584035A
- Authority
- JP
- Japan
- Prior art keywords
- silicone oil
- powder
- oil film
- magnetic powder
- soaked
- 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
Abstract
PURPOSE: To obtain a magnetic recording medium featuring the narrow magnetism keeping power distribution width and small aging of the characteristics by coating the specific ferromagnetic metal powder with the silicone oil film formed on the surface onto the substrate via the bonding agent of the mixture of the functional group content vinyl chloride-vinyl acetate copolymer and the isocyanate.
CONSTITUTION: The iron oxide powder (such as the α-Fe2O3 powder obtained by heating and dehydrating the α-oxy-iron hydroxide obtained from the alkaline solution) is soaked into the silicone oil solution with the heat reduction applied to obtain the ferromagnetic metal powder. Then this magnetic powder is soaked into the silicone oil solution and then dried at about 200W300°C to form the silicone oil film on the surface of the magnetic powder. After this, the magnetic powder with the silicone oil film is coated onto the substrate along with the mixture of the vinyl chloride-vinyl acetate copolymer (like that manufactured by VAGH, UCC company) containing the hydroxyl group or the carboxyl group in the molecule and the isocyanate compound (like Takenate L-1007 manufactured by TAKEDA YAKUHIN KK).
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15957178A JPS5584035A (en) | 1978-12-20 | 1978-12-20 | Manufacture of magnetic recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15957178A JPS5584035A (en) | 1978-12-20 | 1978-12-20 | Manufacture of magnetic recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5584035A true JPS5584035A (en) | 1980-06-24 |
Family
ID=15696620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15957178A Pending JPS5584035A (en) | 1978-12-20 | 1978-12-20 | Manufacture of magnetic recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5584035A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56169304A (en) * | 1980-05-30 | 1981-12-26 | Mitsui Toatsu Chem Inc | Ferromagnetic metal iron corpuscle for magnetic recording |
-
1978
- 1978-12-20 JP JP15957178A patent/JPS5584035A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56169304A (en) * | 1980-05-30 | 1981-12-26 | Mitsui Toatsu Chem Inc | Ferromagnetic metal iron corpuscle for magnetic recording |
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