JPS57183628A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS57183628A
JPS57183628A JP6764381A JP6764381A JPS57183628A JP S57183628 A JPS57183628 A JP S57183628A JP 6764381 A JP6764381 A JP 6764381A JP 6764381 A JP6764381 A JP 6764381A JP S57183628 A JPS57183628 A JP S57183628A
Authority
JP
Japan
Prior art keywords
magnetic
powder
chosen
recording medium
sic
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
JP6764381A
Other languages
Japanese (ja)
Inventor
Masaaki Fujiyama
Nobuo Tsuji
Nobutaka Yamaguchi
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 JP6764381A priority Critical patent/JPS57183628A/en
Priority to DE19823217209 priority patent/DE3217209C3/en
Publication of JPS57183628A publication Critical patent/JPS57183628A/en
Priority to US06/878,405 priority patent/US4668568A/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 reduce the wear of a video head and to increase the lifetime and S/N for a magnetic recording medium, by incorporating a ferromagnetic material, a binder, powder chosen from Cr2O3 and SiC plus inorganic powder chosen from Al2O3, TiO2, SiO2 and ZnO respectively, into a magnetic layer.
CONSTITUTION: The following materials are incorporated into a magnetic layer: the 100pts.wt. ferrormagnetic fine powder; 10W400pts. wt. binder (a thermosetting resin, thermoplastic resin or reaction type resin); ≤0.5wt% inorganic powder having 8.5W9.5 Mohs' hardness and 0.2W5μ grain size which is chosen from Cr2O3 and SiC and to the magnetic powder; ≤5wt% inorganic powder which is chosen from Al2O3, TiO2, SiO2 and ZnO based on the magnetic powder; and a magnetic coating material which is ≥10 times as much as Cr2O3 and SiC and contains a proper amount of necessary additive like a dispersant, an antistatic agent, etc. This coating material is coated on a supporter and then dried to obtain a video magnetic recording medium. This recording medium has a long still lie, a large S/N and a small dropout with reduced deterioration in the above-mentioned properties regardless of the repetitive use for a long time of period.
COPYRIGHT: (C)1982,JPO&Japio
JP6764381A 1981-05-07 1981-05-07 Magnetic recording medium Pending JPS57183628A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP6764381A JPS57183628A (en) 1981-05-07 1981-05-07 Magnetic recording medium
DE19823217209 DE3217209C3 (en) 1981-05-07 1982-05-07 Magnetic recording material
US06/878,405 US4668568A (en) 1981-05-07 1986-06-20 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6764381A JPS57183628A (en) 1981-05-07 1981-05-07 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS57183628A true JPS57183628A (en) 1982-11-12

Family

ID=13350887

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6764381A Pending JPS57183628A (en) 1981-05-07 1981-05-07 Magnetic recording medium

Country Status (2)

Country Link
JP (1) JPS57183628A (en)
DE (1) DE3217209C3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61260423A (en) * 1985-05-14 1986-11-18 Konishiroku Photo Ind Co Ltd Magnetic recording medium
JPS62185233A (en) * 1986-02-10 1987-08-13 Matsushita Electric Ind Co Ltd Magnetic recording medium

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3227335A1 (en) * 1982-07-22 1984-01-26 Basf Ag, 6700 Ludwigshafen MAGNETIC RECORDING CARRIER
US4639389A (en) * 1983-12-12 1987-01-27 Tdk Corporation Magnetic recording medium
DE3407721A1 (en) * 1984-03-02 1985-09-12 Basf Ag, 6700 Ludwigshafen MAGNETIC RECORDING CARRIERS
JPH0690782B2 (en) * 1987-04-17 1994-11-14 富士写真フイルム株式会社 Magnetic recording medium and manufacturing method thereof
DE3731066A1 (en) * 1987-09-16 1989-04-06 Basf Ag MAGNETIC RECORDING CARRIERS
DE4022221A1 (en) * 1990-07-12 1992-01-23 Basf Magnetics Gmbh MAGNETIC BAND WITH ABRASIVES

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1804393A1 (en) * 1968-10-22 1970-05-27 Basf Ag Process for the production of magnetic recording media
DE1929171C3 (en) * 1969-06-09 1979-06-07 Basf Ag, 6700 Ludwigshafen Layer magnetogram carrier
JPS54143608A (en) * 1978-04-29 1979-11-09 Victor Co Of Japan Ltd Magnetic recording medium
JPS5613525A (en) * 1979-07-16 1981-02-09 Tdk Corp Magnetic recording medium

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61260423A (en) * 1985-05-14 1986-11-18 Konishiroku Photo Ind Co Ltd Magnetic recording medium
JPH0435807B2 (en) * 1985-05-14 1992-06-12 Konishiroku Photo Ind
JPS62185233A (en) * 1986-02-10 1987-08-13 Matsushita Electric Ind Co Ltd Magnetic recording medium

Also Published As

Publication number Publication date
DE3217209C3 (en) 1994-09-01
DE3217209C2 (en) 1994-09-01
DE3217209A1 (en) 1982-11-25

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