JPS55125538A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS55125538A
JPS55125538A JP3222379A JP3222379A JPS55125538A JP S55125538 A JPS55125538 A JP S55125538A JP 3222379 A JP3222379 A JP 3222379A JP 3222379 A JP3222379 A JP 3222379A JP S55125538 A JPS55125538 A JP S55125538A
Authority
JP
Japan
Prior art keywords
recording medium
magnetic recording
needle
metallic powder
ferromagnetic metallic
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
JP3222379A
Other languages
Japanese (ja)
Inventor
Akihiko Hosaka
Yasuo Imaoka
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 JP3222379A priority Critical patent/JPS55125538A/en
Priority to NL8001640A priority patent/NL189161C/en
Priority to GB8009353A priority patent/GB2044789B/en
Priority to DE19803010976 priority patent/DE3010976C2/en
Publication of JPS55125538A publication Critical patent/JPS55125538A/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
    • G11B5/706—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
    • G11B5/70605—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 metals or alloys
    • G11B5/70615—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 metals or alloys containing Fe metal or alloys
    • 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

Abstract

PURPOSE: To obtain a magnetic recording medium which is excellent in sensitivity and transfer efficiency, and suitable for high density recording, by properly mixing large and small particles of needle-like ferromagnetic metallic powder in case of its use.
CONSTITUTION: At the first magnetic paint is prepared by mixing together with bonding material and stirring 40W80wt% of needle-like ferromagnetic metallic powder whose particle length is 0.1W0.3μ on the average and 60W20wt% of needle- like ferromagnetic metallic powder whose particle length is 0.4W0.8μ on the average, and a magnetic recording medium can be obtained by applying the foregoing on the supporting substance and hardening it.
COPYRIGHT: (C)1980,JPO&Japio
JP3222379A 1979-03-22 1979-03-22 Magnetic recording medium Pending JPS55125538A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP3222379A JPS55125538A (en) 1979-03-22 1979-03-22 Magnetic recording medium
NL8001640A NL189161C (en) 1979-03-22 1980-03-19 MAGNETIC REGISTRATION MEDIUM.
GB8009353A GB2044789B (en) 1979-03-22 1980-03-20 Magnetic recording medium
DE19803010976 DE3010976C2 (en) 1979-03-22 1980-03-21 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3222379A JPS55125538A (en) 1979-03-22 1979-03-22 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS55125538A true JPS55125538A (en) 1980-09-27

Family

ID=12352947

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3222379A Pending JPS55125538A (en) 1979-03-22 1979-03-22 Magnetic recording medium

Country Status (4)

Country Link
JP (1) JPS55125538A (en)
DE (1) DE3010976C2 (en)
GB (1) GB2044789B (en)
NL (1) NL189161C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5864628A (en) * 1981-10-13 1983-04-18 Hitachi Maxell Ltd Magnetic recording medium
US4565726A (en) * 1982-05-24 1986-01-21 Tokyo Shibaura Denki Kabushiki Kaisha Magnetic recording media having ferromagnetic and ferrite particles in the magnetic layer thereof

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57183626A (en) * 1981-05-07 1982-11-12 Fuji Photo Film Co Ltd Magnetic recording medium
JPS58203622A (en) * 1982-05-20 1983-11-28 Asahi Chem Ind Co Ltd Magnetic coating composition for magnetic recording medium
JPS5979432A (en) * 1982-10-29 1984-05-08 Konishiroku Photo Ind Co Ltd Magnetic recording medium
JPS5979431A (en) * 1982-10-29 1984-05-08 Konishiroku Photo Ind Co Ltd Magnetic recording medium

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS503641B1 (en) * 1965-10-30 1975-02-07
US3767464A (en) * 1968-11-13 1973-10-23 Fuji Photo Film Co Ltd Magnetic recording member and method of producing same
JPS574013B2 (en) * 1974-07-31 1982-01-23

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5864628A (en) * 1981-10-13 1983-04-18 Hitachi Maxell Ltd Magnetic recording medium
JPH0319608B2 (en) * 1981-10-13 1991-03-15 Hitachi Maxell
US4565726A (en) * 1982-05-24 1986-01-21 Tokyo Shibaura Denki Kabushiki Kaisha Magnetic recording media having ferromagnetic and ferrite particles in the magnetic layer thereof

Also Published As

Publication number Publication date
GB2044789B (en) 1983-01-12
NL189161B (en) 1992-08-17
NL189161C (en) 1993-01-18
DE3010976A1 (en) 1980-10-09
NL8001640A (en) 1980-09-24
GB2044789A (en) 1980-10-22
DE3010976C2 (en) 1984-12-13

Similar Documents

Publication Publication Date Title
FR2446669B1 (en)
JPS5586103A (en) High density magnetic recording unit
JPS54143608A (en) Magnetic recording medium
JPS5377612A (en) Cleaning tape for magnetic recorder
JPS55105253A (en) Magnetic developer and its preparation
JPS55125538A (en) Magnetic recording medium
JPS57183624A (en) Magnetic recording medium
JPS5370397A (en) Strongly magnetic metallic powder, preparation of same and magneticrecording media emplying same
JPS56117336A (en) Manufacture of magnetic recording medium
JPS57135436A (en) Magnetic recording medium
JPS57135428A (en) Magnetic recording medium
JPS5555432A (en) Magnetic recording medium
JPS5315803A (en) Magnetic recording material
JPS5619526A (en) Magnetic disc
JPS5341202A (en) Novel magnetic recording medium
JPS5758246A (en) Manufacture of vertical magnetic recording medium
JPS5597407A (en) Preparation of needle crystal metallic iron magnetic particulate powder
JPS5532252A (en) Magnetic recording medium
JPS51148407A (en) Magnetic recording medium
JPS54147008A (en) Magnetic recording medium
JPS5314489A (en) Process for manufacturing grinding tool
JPS5383707A (en) Magnetic recording medium composition and preparation thereof
JPS5279294A (en) Electric wave absorbent
JPS56166310A (en) Manufacture of needlelike iron-base ferromagnetic metallic powder
JPS5532209A (en) Magnetic recording medium