JPS57152541A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS57152541A
JPS57152541A JP56039844A JP3984481A JPS57152541A JP S57152541 A JPS57152541 A JP S57152541A JP 56039844 A JP56039844 A JP 56039844A JP 3984481 A JP3984481 A JP 3984481A JP S57152541 A JPS57152541 A JP S57152541A
Authority
JP
Japan
Prior art keywords
epoxy compound
binder
liquid epoxy
recording medium
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
JP56039844A
Other languages
Japanese (ja)
Inventor
Sadamu Kuze
Masayoshi Kawarai
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 JP56039844A priority Critical patent/JPS57152541A/en
Publication of JPS57152541A publication Critical patent/JPS57152541A/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
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/735—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer characterised by the back layer
    • G11B5/7356—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer characterised by the back layer comprising non-magnetic particles in the back layer, e.g. particles of TiO2, ZnO or SiO2
    • G11B5/7358—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer characterised by the back layer comprising non-magnetic particles in the back layer, e.g. particles of TiO2, ZnO or SiO2 specially adapted for achieving a specific property, e.g. average roughness [Ra]

Landscapes

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

Abstract

PURPOSE:To improve coating operability and to form a back-coating layer which has excellent strength, by adding a liquid epoxy compound to back-coating paint obtained by bonding nonmagnetic powder to a specific binder. CONSTITUTION:A back-coating layer formed by adhering nonmagnetic powder, such as alumina powder, having >=6 Mohs' hardness to a binder containing cellulose resin contains a liquid epoxy compound. As this liquid epoxy compound, an cyclic aliphatic epoxy compound such as 3.4-epoxy cyclohexyl methyl-3.4-epoxy cyclohexane calboxylate is used by 0.1-20wt% and favorably 1-10wt% for the whole binder.
JP56039844A 1981-03-18 1981-03-18 Magnetic recording medium Pending JPS57152541A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56039844A JPS57152541A (en) 1981-03-18 1981-03-18 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56039844A JPS57152541A (en) 1981-03-18 1981-03-18 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS57152541A true JPS57152541A (en) 1982-09-20

Family

ID=12564265

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56039844A Pending JPS57152541A (en) 1981-03-18 1981-03-18 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS57152541A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59188831A (en) * 1983-04-11 1984-10-26 Fuji Photo Film Co Ltd Magnetic recording medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59188831A (en) * 1983-04-11 1984-10-26 Fuji Photo Film Co Ltd Magnetic recording medium
JPH0479053B2 (en) * 1983-04-11 1992-12-14 Fuji Photo Film Co Ltd

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