JPS5774830A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5774830A
JPS5774830A JP55151128A JP15112880A JPS5774830A JP S5774830 A JPS5774830 A JP S5774830A JP 55151128 A JP55151128 A JP 55151128A JP 15112880 A JP15112880 A JP 15112880A JP S5774830 A JPS5774830 A JP S5774830A
Authority
JP
Japan
Prior art keywords
metallic
magnetic
mohs
hardness
sendust
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
JP55151128A
Other languages
Japanese (ja)
Other versions
JPH0721855B2 (en
Inventor
Atsutaka Yamaguchi
Tsunemi Oiwa
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.)
Maxell Ltd
Original Assignee
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 Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP55151128A priority Critical patent/JPH0721855B2/en
Publication of JPS5774830A publication Critical patent/JPS5774830A/en
Publication of JPH0721855B2 publication Critical patent/JPH0721855B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B5/708—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 addition of non-magnetic particles to the layer

Landscapes

  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To obtain a metallic tape which makes a magnetic head made of sendust hardly worn out, by making a magnetic layer contain solid particles having lower Mohs' hardness than that of metallic iron, by a proper quantity. CONSTITUTION:Magnetic paint is prepared by dispersing 0.1-10wt% (basing on metallic magnetic powder consisting essentially of metallic iron) solid particles (PbO, ZnO, Cu2O, WO3, MoO3, CaF2, BN, etc.) having a Mohs' hardness lower than Mohs' hardness of metallic iron, that is to say, 4.5, in a solution of a resin binder together with the metallic magnetic powder and adding an additive such as dispersant or lubricant, if necessary. This magnetic paint is applied on the substrate of polyester film, etc. and is dried, by which a magnetic layer of about 5mu is formed. In this way, it is possible to obtain a metallic tape for high density recording, by which a magnetic head made of sendust is scarcely worn out.
JP55151128A 1980-10-27 1980-10-27 Magnetic recording medium Expired - Lifetime JPH0721855B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55151128A JPH0721855B2 (en) 1980-10-27 1980-10-27 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55151128A JPH0721855B2 (en) 1980-10-27 1980-10-27 Magnetic recording medium

Publications (2)

Publication Number Publication Date
JPS5774830A true JPS5774830A (en) 1982-05-11
JPH0721855B2 JPH0721855B2 (en) 1995-03-08

Family

ID=15511970

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55151128A Expired - Lifetime JPH0721855B2 (en) 1980-10-27 1980-10-27 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPH0721855B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4636806A (en) * 1984-03-30 1987-01-13 Research Development Corporation Of Japan Recording medium
EP0270171A3 (en) * 1986-11-27 1988-07-06 PD Magnetics B.V. Magnetic recording element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4636806A (en) * 1984-03-30 1987-01-13 Research Development Corporation Of Japan Recording medium
EP0270171A3 (en) * 1986-11-27 1988-07-06 PD Magnetics B.V. Magnetic recording element

Also Published As

Publication number Publication date
JPH0721855B2 (en) 1995-03-08

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