JPS54123922A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

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
Application number
JP3137678A
Other languages
Japanese (ja)
Other versions
JPS5749972B2 (en
Inventor
Takashi Suzuki
Isao Sumita
Akihiro Imai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP3137678A priority Critical patent/JPS54123922A/en
Publication of JPS54123922A publication Critical patent/JPS54123922A/en
Publication of JPS5749972B2 publication Critical patent/JPS5749972B2/ja
Granted legal-status Critical Current

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
JP3137678A 1978-03-17 1978-03-17 Magnetic recording medium Granted JPS54123922A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (11)

* Cited by examiner, † Cited by third party
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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