JPS57141018A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS57141018A
JPS57141018A JP2450081A JP2450081A JPS57141018A JP S57141018 A JPS57141018 A JP S57141018A JP 2450081 A JP2450081 A JP 2450081A JP 2450081 A JP2450081 A JP 2450081A JP S57141018 A JPS57141018 A JP S57141018A
Authority
JP
Japan
Prior art keywords
magnetic
added
epoxy compound
liquid epoxy
powder
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
JP2450081A
Other languages
Japanese (ja)
Inventor
Sadamu Kuze
Masayoshi Kawarai
Seiji Wataya
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 Holdings 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 JP2450081A priority Critical patent/JPS57141018A/en
Publication of JPS57141018A publication Critical patent/JPS57141018A/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
    • G11B5/708—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
    • G11B5/7085—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 non-magnetic abrasive particles

Landscapes

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

Abstract

PURPOSE:To prevent thickening and gelling of a magnetic coating material to obtain a magnetic tape or the like superior in electromagnetic conversion characteristic and surface smoothness, by adding magnetic powder, nonmagnetic powder having a hardness higher than a specific value, and a liquid epoxy compound to a binder containing cellulose resin. CONSTITUTION:Nonmagnetic powder of >=6 Mohs' hardness such as alumina is mixed with magnetic powder for the purpose of improving the durability of a magnetic layer, and a liquid epoxy compound, specially, a cycloaliphatic epoxy compound is added to the magnetic layer containing cellulose resin such as nitro cellulose. 0.1-20wt% liquid epoxy resin is added to the overall quantity of a binder. Polyurethane elastomer may be added for the purpose of giving flexibility, and polyisocyanate may be added for the purpose of giving strength. Thus, the magnetic coating material is prevented from thickening and gelling during the production and the use, and a magnetic tape superior in electromagnetic conversion characteristic and smoothness is obtained.
JP2450081A 1981-02-20 1981-02-20 Magnetic recording medium Pending JPS57141018A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2450081A JPS57141018A (en) 1981-02-20 1981-02-20 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2450081A JPS57141018A (en) 1981-02-20 1981-02-20 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS57141018A true JPS57141018A (en) 1982-09-01

Family

ID=12139900

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2450081A Pending JPS57141018A (en) 1981-02-20 1981-02-20 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57141018A (en)

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