JPS57210432A - Manufacture of magnetic recording medium - Google Patents

Manufacture of magnetic recording medium

Info

Publication number
JPS57210432A
JPS57210432A JP56095311A JP9531181A JPS57210432A JP S57210432 A JPS57210432 A JP S57210432A JP 56095311 A JP56095311 A JP 56095311A JP 9531181 A JP9531181 A JP 9531181A JP S57210432 A JPS57210432 A JP S57210432A
Authority
JP
Japan
Prior art keywords
recording medium
magnetic recording
manufacture
protective film
amount
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
JP56095311A
Other languages
Japanese (ja)
Inventor
Kazuyoshi Yoshida
Seiichi Asada
Michiharu Seki
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.)
Hitachi Ltd
Maxell Holdings Ltd
Original Assignee
Hitachi Ltd
Hitachi Maxell 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 Hitachi Ltd, Hitachi Maxell Ltd filed Critical Hitachi Ltd
Priority to JP56095311A priority Critical patent/JPS57210432A/en
Publication of JPS57210432A publication Critical patent/JPS57210432A/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
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/712—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the surface treatment or coating of magnetic particles

Abstract

PURPOSE:To improve corrosion resistance and surface smoothness by using ferromagnetic iron powder which has an oxidation protective film on the surface and also has the amount of saturated magnetism with a specific range. CONSTITUTION:A base is painted with ferromagnetic alloy powder, which consists essentially of iron having a dense oxidation protective film on the surface while having a 90-135emu/g saturated magnetism amount, together with a resin binder, thus obtaining a magnetic recording medium.
JP56095311A 1981-06-22 1981-06-22 Manufacture of magnetic recording medium Pending JPS57210432A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56095311A JPS57210432A (en) 1981-06-22 1981-06-22 Manufacture of magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56095311A JPS57210432A (en) 1981-06-22 1981-06-22 Manufacture of magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS57210432A true JPS57210432A (en) 1982-12-24

Family

ID=14134206

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56095311A Pending JPS57210432A (en) 1981-06-22 1981-06-22 Manufacture of magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57210432A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59151337A (en) * 1983-02-17 1984-08-29 Tdk Corp Magnetic recording medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59151337A (en) * 1983-02-17 1984-08-29 Tdk Corp Magnetic recording medium

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