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JPS5753825A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5753825A
JPS5753825A JP55112721A JP11272180A JPS5753825A JP S5753825 A JPS5753825 A JP S5753825A JP 55112721 A JP55112721 A JP 55112721A JP 11272180 A JP11272180 A JP 11272180A JP S5753825 A JPS5753825 A JP S5753825A
Authority
JP
Japan
Prior art keywords
particle
recording medium
inorganic
inorganic powder
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
JP55112721A
Other languages
Japanese (ja)
Inventor
Takahito Miyoshi
Toshimitsu Okutsu
Masaaki Fujiyama
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co 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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP55112721A priority Critical patent/JPS5753825A/en
Priority to US06/292,851 priority patent/US4474843A/en
Priority to DE3132604A priority patent/DE3132604C2/en
Publication of JPS5753825A publication Critical patent/JPS5753825A/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 obtain a magnetic recording medium which excels in traveling durability without causing any deterioration of S/N property, any increment of friction coefft., by providing a back layer that contains the inorganic powder obtained by combining fine and coarse particles. CONSTITUTION:Inorganic powder is obtained by mixing a pts. vol. inorganic coarse particle (such as Al2O3 particle) of 0.1-0.8mu mean grain size (a) and 10pts.vol. inorganic coarse particles (such as CaCO3 particle) of 0.01-0.1mu mean grain size (b). Then a coating material containing above-mentioned inorganic powder and a binder in a ratio of about 2.5-0.1/1wt% is coated on the back (opposite to the magnetic layer) of a supporter and dried to from a back layer of <=2mu thickness (preferably 0.5-1mu).
JP55112721A 1980-08-18 1980-08-18 Magnetic recording medium Pending JPS5753825A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP55112721A JPS5753825A (en) 1980-08-18 1980-08-18 Magnetic recording medium
US06/292,851 US4474843A (en) 1980-08-18 1981-08-14 Magnetic recording medium
DE3132604A DE3132604C2 (en) 1980-08-18 1981-08-18 Magnetic recording material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55112721A JPS5753825A (en) 1980-08-18 1980-08-18 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS5753825A true JPS5753825A (en) 1982-03-31

Family

ID=14593856

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55112721A Pending JPS5753825A (en) 1980-08-18 1980-08-18 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5753825A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59193535A (en) * 1983-04-19 1984-11-02 Fuji Photo Film Co Ltd Magnetic recording body
JPS59223937A (en) * 1983-06-03 1984-12-15 Fuji Photo Film Co Ltd Magnetic recording medium
JPS59227026A (en) * 1983-06-06 1984-12-20 Fuji Photo Film Co Ltd Magnetic recording medium
JPS6032122A (en) * 1983-07-30 1985-02-19 Hitachi Maxell Ltd Magnetic recording medium
JPS6038725A (en) * 1983-08-09 1985-02-28 Fuji Photo Film Co Ltd Magnetic recording medium
JPS60107729A (en) * 1983-11-16 1985-06-13 Fuji Photo Film Co Ltd Magnetic recording medium
US5616398A (en) * 1993-05-14 1997-04-01 Tdk Corporation Magnetic recording medium
US5932330A (en) * 1993-09-30 1999-08-03 Imation Corp. Coated magnetic recording medium, paint for coated magnetic medium and method for producing coated magnetic medium
US6030695A (en) * 1996-03-28 2000-02-29 Imation Corp. Coated magnetic recording medium, paint for coated magnetic medium and method for producing coated magnetic medium

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59193535A (en) * 1983-04-19 1984-11-02 Fuji Photo Film Co Ltd Magnetic recording body
JPS59223937A (en) * 1983-06-03 1984-12-15 Fuji Photo Film Co Ltd Magnetic recording medium
JPS59227026A (en) * 1983-06-06 1984-12-20 Fuji Photo Film Co Ltd Magnetic recording medium
JPS6032122A (en) * 1983-07-30 1985-02-19 Hitachi Maxell Ltd Magnetic recording medium
JPH0568007B2 (en) * 1983-07-30 1993-09-28 Hitachi Maxell
JPS6038725A (en) * 1983-08-09 1985-02-28 Fuji Photo Film Co Ltd Magnetic recording medium
JPS60107729A (en) * 1983-11-16 1985-06-13 Fuji Photo Film Co Ltd Magnetic recording medium
US5616398A (en) * 1993-05-14 1997-04-01 Tdk Corporation Magnetic recording medium
US5932330A (en) * 1993-09-30 1999-08-03 Imation Corp. Coated magnetic recording medium, paint for coated magnetic medium and method for producing coated magnetic medium
US6030695A (en) * 1996-03-28 2000-02-29 Imation Corp. Coated magnetic recording medium, paint for coated magnetic medium and method for producing coated magnetic medium

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