JPH0520808B2 - - Google Patents

Info

Publication number
JPH0520808B2
JPH0520808B2 JP59077882A JP7788284A JPH0520808B2 JP H0520808 B2 JPH0520808 B2 JP H0520808B2 JP 59077882 A JP59077882 A JP 59077882A JP 7788284 A JP7788284 A JP 7788284A JP H0520808 B2 JPH0520808 B2 JP H0520808B2
Authority
JP
Japan
Prior art keywords
magnetic
magnetic layer
layer
acid
coating
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 - Fee Related
Application number
JP59077882A
Other languages
English (en)
Japanese (ja)
Other versions
JPS60223018A (ja
Inventor
Takahito Myoshi
Masaaki Fujama
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 JP59077882A priority Critical patent/JPS60223018A/ja
Priority to US06/724,723 priority patent/US4643941A/en
Publication of JPS60223018A publication Critical patent/JPS60223018A/ja
Publication of JPH0520808B2 publication Critical patent/JPH0520808B2/ja
Granted 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
    • G11B5/716—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 two or more magnetic layers
    • 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
    • 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
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • Y10T428/265—1 mil or less

Landscapes

  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
JP59077882A 1984-04-18 1984-04-18 磁気記録媒体 Granted JPS60223018A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP59077882A JPS60223018A (ja) 1984-04-18 1984-04-18 磁気記録媒体
US06/724,723 US4643941A (en) 1984-04-18 1985-04-18 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59077882A JPS60223018A (ja) 1984-04-18 1984-04-18 磁気記録媒体

Publications (2)

Publication Number Publication Date
JPS60223018A JPS60223018A (ja) 1985-11-07
JPH0520808B2 true JPH0520808B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1993-03-22

Family

ID=13646442

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59077882A Granted JPS60223018A (ja) 1984-04-18 1984-04-18 磁気記録媒体

Country Status (2)

Country Link
US (1) US4643941A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS60223018A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH077499B2 (ja) * 1986-01-29 1995-01-30 ソニー株式会社 磁気記録媒体
JPH0719360B2 (ja) * 1986-03-13 1995-03-06 富士写真フイルム株式会社 磁気記録媒体
JPS6339124A (ja) * 1986-08-01 1988-02-19 Hitachi Maxell Ltd 磁気記録媒体及びその製造方法
JPH0690782B2 (ja) * 1987-04-17 1994-11-14 富士写真フイルム株式会社 磁気記録媒体及びその製造方法
JPH0770047B2 (ja) * 1987-07-06 1995-07-31 富士写真フイルム株式会社 磁気記録媒体
JPH0727631B2 (ja) * 1987-09-21 1995-03-29 富士写真フイルム株式会社 磁気記録媒体
JP2641051B2 (ja) * 1987-10-19 1997-08-13 富士写真フイルム株式会社 磁気テープ
JP2581570B2 (ja) * 1987-10-19 1997-02-12 富士写真フイルム株式会社 ビデオ用磁気記録媒体
JP2581583B2 (ja) * 1988-02-12 1997-02-12 富士写真フイルム株式会社 磁気記録媒体
JP2631685B2 (ja) * 1988-02-29 1997-07-16 富士写真フイルム株式会社 磁気記録媒体
JP2632197B2 (ja) * 1988-10-14 1997-07-23 富士写真フイルム株式会社 磁気記録媒体
EP0373563A3 (en) * 1988-12-12 1991-09-18 Konica Corporation Magnetic recording medium
US5089317A (en) * 1989-01-20 1992-02-18 Fuji Photo Film Co, Ltd. Magnetic recording medium
JP2631562B2 (ja) * 1989-07-06 1997-07-16 富士写真フイルム株式会社 磁気記録媒体
JPH043316A (ja) * 1990-04-20 1992-01-08 Fuji Photo Film Co Ltd 磁気記録媒体及びその製造方法
US5384182A (en) * 1990-05-11 1995-01-24 Kabushiki Kaisha Toshiba Magnetic recording medium and a method for producing the same wherein the medium has two magnetic layers differing in degree of orientation
JPH04117617A (ja) * 1990-07-13 1992-04-17 Konica Corp 磁気記録媒体
DE4142052C2 (de) * 1990-12-20 1999-07-15 Fuji Photo Film Co Ltd Magnetaufzeichnungsmedium
JPH05135353A (ja) * 1991-05-20 1993-06-01 Toshiba Corp 磁気記録媒体
US5494732A (en) * 1992-01-06 1996-02-27 Kabushiki Kaisha Toshiba Magnetic recording medium and a method for producing the same wherein the medium has two magnetic layers differing in degree of orientation
US5776590A (en) * 1995-04-04 1998-07-07 Kao Corporation Magnetic recording medium

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS545705A (en) * 1977-06-16 1979-01-17 Fuji Photo Film Co Ltd Double layer magnetic recording medium
JPS54162666A (en) * 1978-06-15 1979-12-24 Sony Corp Manufacture of needlelike magnetic alloy particle
JPS57183630A (en) * 1981-05-07 1982-11-12 Fuji Photo Film Co Ltd Magnetic recording medium
JPS57195329A (en) * 1981-05-26 1982-12-01 Fuji Photo Film Co Ltd Magnetic recording medium
JPS58119609A (ja) * 1982-01-11 1983-07-16 Fuji Photo Film Co Ltd 磁気記録媒体
JPS58203625A (ja) * 1982-05-24 1983-11-28 Toshiba Corp 磁気記録媒体
JPS58205928A (ja) * 1982-05-25 1983-12-01 Toshiba Corp 磁気記録媒体
US4493874A (en) * 1983-03-08 1985-01-15 Tokyo Shibaura Denki Kabushiki Kaisha Production of a magnetic powder having a high dispersibility
JPS59167843A (ja) * 1983-03-14 1984-09-21 Hitachi Maxell Ltd 磁気記録媒体
JPH0624062B2 (ja) * 1984-04-06 1994-03-30 日立マクセル株式会社 磁気記録媒体

Also Published As

Publication number Publication date
US4643941A (en) 1987-02-17
JPS60223018A (ja) 1985-11-07

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees