DE3480970D1 - Magnetisches aufzeichnungsmedium und magnetische teilchen hierfuer. - Google Patents

Magnetisches aufzeichnungsmedium und magnetische teilchen hierfuer.

Info

Publication number
DE3480970D1
DE3480970D1 DE8484109720T DE3480970T DE3480970D1 DE 3480970 D1 DE3480970 D1 DE 3480970D1 DE 8484109720 T DE8484109720 T DE 8484109720T DE 3480970 T DE3480970 T DE 3480970T DE 3480970 D1 DE3480970 D1 DE 3480970D1
Authority
DE
Germany
Prior art keywords
magnetic
recording medium
magnetic recording
magnetic particles
particles therefor
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.)
Expired - Lifetime
Application number
DE8484109720T
Other languages
English (en)
Inventor
Haruo Andoh
Seiji Matsumoto
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
Sakai Chemical Industry Co Ltd
Original Assignee
Sakai Chemical Industry Co Ltd
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 Sakai Chemical Industry Co Ltd, Hitachi Maxell Ltd filed Critical Sakai Chemical Industry Co Ltd
Application granted granted Critical
Publication of DE3480970D1 publication Critical patent/DE3480970D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • G11B5/714—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 the dimension of the magnetic particles
    • 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
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • 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
    • G11B5/706—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 the composition of the magnetic material
    • G11B5/70626—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 the composition of the magnetic material containing non-metallic substances
    • G11B5/70642—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 the composition of the magnetic material containing non-metallic substances iron oxides
    • G11B5/70652—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 the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3
    • 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
    • G11B5/712—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 the surface treatment or coating of magnetic particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
DE8484109720T 1983-08-18 1984-08-16 Magnetisches aufzeichnungsmedium und magnetische teilchen hierfuer. Expired - Lifetime DE3480970D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58151116A JPS6042804A (ja) 1983-08-18 1983-08-18 磁気記録媒体及び磁気記録媒体用磁性粉末

Publications (1)

Publication Number Publication Date
DE3480970D1 true DE3480970D1 (de) 1990-02-08

Family

ID=15511706

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484109720T Expired - Lifetime DE3480970D1 (de) 1983-08-18 1984-08-16 Magnetisches aufzeichnungsmedium und magnetische teilchen hierfuer.

Country Status (5)

Country Link
US (1) US4693931A (de)
EP (1) EP0135774B1 (de)
JP (1) JPS6042804A (de)
KR (1) KR920003489B1 (de)
DE (1) DE3480970D1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5028483A (en) * 1990-06-01 1991-07-02 Minnesota Mining And Manufacturing Company Magnetic recording medium comprising acicular dendrite free iron oxide magnetic pigment particles
JP2883229B2 (ja) * 1990-09-14 1999-04-19 富士写真フイルム株式会社 磁気記録媒体
US5397826A (en) * 1993-12-22 1995-03-14 Eastman Kodak Company Coating compositions for a transparent magnetic recording layer
JPH08102034A (ja) * 1994-09-19 1996-04-16 Minnesota Mining & Mfg Co <3M> 磁気記録媒体
KR20020031823A (ko) * 2000-10-24 2002-05-03 김동수 파우더 고착 방지 수단을 구비한 배기가스 이송 파이프
AU2003274417A1 (en) * 2002-10-30 2004-05-25 Council Of Scientific And Industrial Research Process for preparing nanosized acicular magnetic maghemite phase iron oxide particles
KR100840851B1 (ko) * 2003-11-10 2008-06-23 마츠시타 덴끼 산교 가부시키가이샤 기록매체, 재생장치, 재생방법, 시스템 집적회로
DE102014206349A1 (de) * 2014-04-02 2015-10-08 Tesa Se Klebeband

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3003965A (en) * 1953-09-29 1961-10-10 Philips Corp Method of preparing a magnetic sound carrier
JPS52142756A (en) * 1976-05-24 1977-11-28 Tdk Corp Nitrocellulose and magnetic recording media
US4202871A (en) * 1977-11-14 1980-05-13 Sakai Chemical Industry Co., Ltd. Production of acicular ferric oxide
JPS54107709A (en) * 1978-02-10 1979-08-23 Victor Co Of Japan Ltd Magnetic recording material
JPS554694A (en) * 1979-05-10 1980-01-14 Canon Inc Electronic apparatus
JPS5661035A (en) * 1979-10-24 1981-05-26 Hitachi Maxell Ltd Magnetic recording medium
JPS5677926A (en) * 1979-11-28 1981-06-26 Tdk Corp Magnetic recording medium using cobalt adhesion type iron oxide
EP0043882A1 (de) * 1980-07-16 1982-01-20 Kodak-Pathe Magnetisches Aufzeichnungselement, Verfahren zu seiner Herstellung und seine Verwendung beim Aufzeichnen
JPH0721854B2 (ja) * 1981-05-29 1995-03-08 富士写真フイルム株式会社 磁気記録体
JPS5819735A (ja) * 1981-07-25 1983-02-04 Tdk Corp 磁気記録媒体
JPS6057527A (ja) * 1983-09-08 1985-04-03 Fuji Photo Film Co Ltd 磁気記録媒体
US4584242A (en) * 1984-05-31 1986-04-22 Toda Kogyo Corp. Plate-like barium ferrite particles for magnetic recording and process for producing the same

Also Published As

Publication number Publication date
EP0135774B1 (de) 1990-01-03
JPS6042804A (ja) 1985-03-07
KR850002138A (ko) 1985-05-06
EP0135774A2 (de) 1985-04-03
JPH0544163B2 (de) 1993-07-05
US4693931A (en) 1987-09-15
KR920003489B1 (ko) 1992-05-01
EP0135774A3 (en) 1987-04-08

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee