JPS56143540A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS56143540A
JPS56143540A JP4717780A JP4717780A JPS56143540A JP S56143540 A JPS56143540 A JP S56143540A JP 4717780 A JP4717780 A JP 4717780A JP 4717780 A JP4717780 A JP 4717780A JP S56143540 A JPS56143540 A JP S56143540A
Authority
JP
Japan
Prior art keywords
layer
ferromagnetic metallic
recording medium
metallic layer
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.)
Pending
Application number
JP4717780A
Other languages
Japanese (ja)
Inventor
Yasuyuki Yamada
Ryuji Shirahata
Akio Yanai
Tatsuji Kitamoto
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film 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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP4717780A priority Critical patent/JPS56143540A/en
Priority to DE3114248A priority patent/DE3114248C2/en
Priority to US06/252,762 priority patent/US4448843A/en
Priority to NL8101770A priority patent/NL8101770A/en
Publication of JPS56143540A publication Critical patent/JPS56143540A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/72—Protective coatings, e.g. anti-static or antifriction

Landscapes

  • Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To improve wear resistance, scratch resistance and running stability, by providing a specific resin layer on the surface of a ferromagnetic metallic layer. CONSTITUTION:On a base body, a ferromagnetic metallic layer is vapor-deposited and on the ferromagnetic metallic layer, a layer made of polyurethane resin of about 5,000-500,000 in average molecular weight is provided to a thickness of 0.002- 0.3 micron. Into the protective layer made of polyurethane resin, a 0.2-30wt% cellulose derivative, vinyl polymer and lubricant may adequately be added.
JP4717780A 1980-04-10 1980-04-10 Magnetic recording medium Pending JPS56143540A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP4717780A JPS56143540A (en) 1980-04-10 1980-04-10 Magnetic recording medium
DE3114248A DE3114248C2 (en) 1980-04-10 1981-04-08 Magnetic recording medium with a protective layer
US06/252,762 US4448843A (en) 1980-04-10 1981-04-10 Magnetic recording medium
NL8101770A NL8101770A (en) 1980-04-10 1981-04-10 MAGNETIC MEMORY MATERIAL WITH PROTECTIVE LAYER.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4717780A JPS56143540A (en) 1980-04-10 1980-04-10 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS56143540A true JPS56143540A (en) 1981-11-09

Family

ID=12767787

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4717780A Pending JPS56143540A (en) 1980-04-10 1980-04-10 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS56143540A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58196624A (en) * 1982-05-12 1983-11-16 Fuji Photo Film Co Ltd Manufacture of magnetic recording medium
JPS58218042A (en) * 1982-06-10 1983-12-19 Konishiroku Photo Ind Co Ltd Magnetic recording medium

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5151306A (en) * 1974-10-31 1976-05-06 Fuji Photo Film Co Ltd JIKIKIROKUBAITAI
JPS53118104A (en) * 1977-03-25 1978-10-16 Dainippon Ink & Chemicals Magnetic combination type recording material

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5151306A (en) * 1974-10-31 1976-05-06 Fuji Photo Film Co Ltd JIKIKIROKUBAITAI
JPS53118104A (en) * 1977-03-25 1978-10-16 Dainippon Ink & Chemicals Magnetic combination type recording material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58196624A (en) * 1982-05-12 1983-11-16 Fuji Photo Film Co Ltd Manufacture of magnetic recording medium
JPS58218042A (en) * 1982-06-10 1983-12-19 Konishiroku Photo Ind Co Ltd Magnetic recording medium
JPH0247007B2 (en) * 1982-06-10 1990-10-18 Konishiroku Photo Ind

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