JPS5778631A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5778631A
JPS5778631A JP55152613A JP15261380A JPS5778631A JP S5778631 A JPS5778631 A JP S5778631A JP 55152613 A JP55152613 A JP 55152613A JP 15261380 A JP15261380 A JP 15261380A JP S5778631 A JPS5778631 A JP S5778631A
Authority
JP
Japan
Prior art keywords
acid
powder
alpha
base body
iron oxide
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
JP55152613A
Other languages
Japanese (ja)
Inventor
Takeshi Matsuura
Seiji Wataya
Akira Morioka
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 JP55152613A priority Critical patent/JPS5778631A/en
Publication of JPS5778631A publication Critical patent/JPS5778631A/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
    • 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

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

Abstract

PURPOSE:To elevate the running property whose electromagnetic conversion characteristic is not deteriorated, by providing a back coating layer containing nonmagnetic iron oxide powder and fatty acid, on the reverse side of a base body film. CONSTITUTION:A back coating layer containing nonmagnetic iron oxide powder whose mean particle diameter is <=0.5mu such as alpha-Fe2O3 powder, alpha-FeOOH powder, etc., and fatty acid such as lauric acid, muristic acid, palmitic acid, stearic acid, oleic acid, etc., ina binder such as vinyl chloride-vinyl acetate-vinyl alcohol copolymer, etc. is provided on the reverse side of a base body film having a magnetic layer on its one surface.
JP55152613A 1980-10-29 1980-10-29 Magnetic recording medium Pending JPS5778631A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55152613A JPS5778631A (en) 1980-10-29 1980-10-29 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55152613A JPS5778631A (en) 1980-10-29 1980-10-29 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS5778631A true JPS5778631A (en) 1982-05-17

Family

ID=15544209

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55152613A Pending JPS5778631A (en) 1980-10-29 1980-10-29 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5778631A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5030332A (en) * 1990-04-19 1991-07-09 Massachusetts Institute Of Technology Method for making magnetic oxide precipitates

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4917203A (en) * 1972-06-02 1974-02-15
JPS518561A (en) * 1974-07-09 1976-01-23 Tokyo Shibaura Electric Co Shoketsufukugotaino seizohoho

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4917203A (en) * 1972-06-02 1974-02-15
JPS518561A (en) * 1974-07-09 1976-01-23 Tokyo Shibaura Electric Co Shoketsufukugotaino seizohoho

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5030332A (en) * 1990-04-19 1991-07-09 Massachusetts Institute Of Technology Method for making magnetic oxide precipitates

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