JPS5755533A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5755533A
JPS5755533A JP55131072A JP13107280A JPS5755533A JP S5755533 A JPS5755533 A JP S5755533A JP 55131072 A JP55131072 A JP 55131072A JP 13107280 A JP13107280 A JP 13107280A JP S5755533 A JPS5755533 A JP S5755533A
Authority
JP
Japan
Prior art keywords
specific gravity
nonmagnetic powder
recording medium
magnetic recording
magnetic layer
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
JP55131072A
Other languages
Japanese (ja)
Inventor
Isao Kubota
Kenichi Baba
Kunio Kobayashi
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP55131072A priority Critical patent/JPS5755533A/en
Publication of JPS5755533A publication Critical patent/JPS5755533A/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

Abstract

PURPOSE:To increase not only the wear resistance but the stability, by adding plural types of nonmagnetic powder of different levels of specific gravity and high level of hardness into a magnetic layer. CONSTITUTION:The nonmagnetic powder of Cr2O3, ZrSiO4, etc. having >=7 Mohs hardness plus >=4 specific gravity and another type of nonmagnetic powder of SiC, Si3N4, SiO2, Al2O3, etc. having >=7 Mohs hardness plus <=4 specific gravity are mixed into a magnetic layer 2 provided on a substrate 1.
JP55131072A 1980-09-20 1980-09-20 Magnetic recording medium Pending JPS5755533A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55131072A JPS5755533A (en) 1980-09-20 1980-09-20 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55131072A JPS5755533A (en) 1980-09-20 1980-09-20 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS5755533A true JPS5755533A (en) 1982-04-02

Family

ID=15049332

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55131072A Pending JPS5755533A (en) 1980-09-20 1980-09-20 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5755533A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6093631A (en) * 1983-10-26 1985-05-25 Hitachi Maxell Ltd Magnetic recording medium
JPS60202532A (en) * 1984-03-28 1985-10-14 Konishiroku Photo Ind Co Ltd Magnetic recording medium
JPS62109227A (en) * 1985-11-06 1987-05-20 Fuji Photo Film Co Ltd Magnetic recording medium
JPS62140238A (en) * 1985-12-13 1987-06-23 Konishiroku Photo Ind Co Ltd Magnetic recording medium
JPS62185233A (en) * 1986-02-10 1987-08-13 Matsushita Electric Ind Co Ltd Magnetic recording medium

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6093631A (en) * 1983-10-26 1985-05-25 Hitachi Maxell Ltd Magnetic recording medium
JPH0574130B2 (en) * 1983-10-26 1993-10-15 Hitachi Maxell
JPS60202532A (en) * 1984-03-28 1985-10-14 Konishiroku Photo Ind Co Ltd Magnetic recording medium
JPH0576699B2 (en) * 1984-03-28 1993-10-25 Konishiroku Photo Ind
JPS62109227A (en) * 1985-11-06 1987-05-20 Fuji Photo Film Co Ltd Magnetic recording medium
JPS62140238A (en) * 1985-12-13 1987-06-23 Konishiroku Photo Ind Co Ltd Magnetic recording medium
JPS62185233A (en) * 1986-02-10 1987-08-13 Matsushita Electric Ind Co Ltd Magnetic recording medium

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