JPS5724026A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5724026A
JPS5724026A JP9626580A JP9626580A JPS5724026A JP S5724026 A JPS5724026 A JP S5724026A JP 9626580 A JP9626580 A JP 9626580A JP 9626580 A JP9626580 A JP 9626580A JP S5724026 A JPS5724026 A JP S5724026A
Authority
JP
Japan
Prior art keywords
powder
abrasive
magnetic
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
JP9626580A
Other languages
Japanese (ja)
Inventor
Norifumi Kajimoto
Nobuhiro Sato
Yoshio Kawakami
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.)
TDK Corp
Original Assignee
TDK 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 TDK Corp filed Critical TDK Corp
Priority to JP9626580A priority Critical patent/JPS5724026A/en
Priority to DE19813128005 priority patent/DE3128005A1/en
Publication of JPS5724026A publication Critical patent/JPS5724026A/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

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

Abstract

PURPOSE: To obtain a magnetic recording medium with which a reduction of the reproduced output can be avoided for a repetitive travelling with no increment of the head wear, by compounding the abrasives having a hardness higher than a prescribed value and different pure specific gravities into a magnetic coating film.
CONSTITUTION: The following two types of impalpable powder are used: (a) an abrasive impalpable powder (such as the powder of SiC, TiO2, SiO2, etc.) having (a) ≥6 old Mohs' hardness and a ≤4.2 pure specific gravity; and (b) an abrasive impalapable powder (such as the powder of ZrO2, CeO2, α-Fe2O3, etc.) having a ≥6 old Mohs' hardness and a ≥5 pure specific gravity. In other words, a magnetic coating material obtained by compounding the above-mentioned two types of abrasive powder into a magnetic powder, a binder, etc. is coated on a supporter film to obtain a magnetic recording medium. The total amount of the abrasive powder is set at ≤20wt% or so to the magnetic powder, and the grain size of the abrasive is properly set within a range of 0.1W2μ.
COPYRIGHT: (C)1982,JPO&Japio
JP9626580A 1980-07-16 1980-07-16 Magnetic recording medium Pending JPS5724026A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP9626580A JPS5724026A (en) 1980-07-16 1980-07-16 Magnetic recording medium
DE19813128005 DE3128005A1 (en) 1980-07-16 1981-07-15 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9626580A JPS5724026A (en) 1980-07-16 1980-07-16 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS5724026A true JPS5724026A (en) 1982-02-08

Family

ID=14160328

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9626580A Pending JPS5724026A (en) 1980-07-16 1980-07-16 Magnetic recording medium

Country Status (2)

Country Link
JP (1) JPS5724026A (en)
DE (1) DE3128005A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5930238A (en) * 1982-08-10 1984-02-17 Victor Co Of Japan Ltd Magnetic recording medium
JPS5954036A (en) * 1982-09-21 1984-03-28 Victor Co Of Japan Ltd Magnetic recording medium
JPS61226936A (en) * 1985-03-30 1986-10-08 Toshiba Corp Wire bonding method and apparatus therefor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5758227A (en) * 1980-09-25 1982-04-07 Tdk Corp Magnetic recording medium
DE3407721A1 (en) * 1984-03-02 1985-09-12 Basf Ag, 6700 Ludwigshafen MAGNETIC RECORDING CARRIERS
DE3522681A1 (en) * 1985-06-25 1987-01-08 Basf Ag METHOD FOR PRODUCING MAGNETIC RECORDING CARRIERS

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5930238A (en) * 1982-08-10 1984-02-17 Victor Co Of Japan Ltd Magnetic recording medium
JPH039530B2 (en) * 1982-08-10 1991-02-08 Victor Company Of Japan
JPS5954036A (en) * 1982-09-21 1984-03-28 Victor Co Of Japan Ltd Magnetic recording medium
JPH039531B2 (en) * 1982-09-21 1991-02-08 Victor Company Of Japan
JPS61226936A (en) * 1985-03-30 1986-10-08 Toshiba Corp Wire bonding method and apparatus therefor
JPH0438136B2 (en) * 1985-03-30 1992-06-23 Tokyo Shibaura Electric Co

Also Published As

Publication number Publication date
DE3128005A1 (en) 1982-05-13

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