JPS5626411A - Surface treatment of magnetic powder - Google Patents

Surface treatment of magnetic powder

Info

Publication number
JPS5626411A
JPS5626411A JP10290379A JP10290379A JPS5626411A JP S5626411 A JPS5626411 A JP S5626411A JP 10290379 A JP10290379 A JP 10290379A JP 10290379 A JP10290379 A JP 10290379A JP S5626411 A JPS5626411 A JP S5626411A
Authority
JP
Japan
Prior art keywords
magnetic powder
radiation
thin film
paint
magnetic
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
JP10290379A
Other languages
Japanese (ja)
Inventor
Kaoru Nakajima
Kunio Kobayashi
Yoshiaki Kugen
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP10290379A priority Critical patent/JPS5626411A/en
Publication of JPS5626411A publication Critical patent/JPS5626411A/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
    • G11B5/712—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

Landscapes

  • Application Of Or Painting With Fluid Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

PURPOSE:To improve the combination with a binder when a hydrophobic thin film is securely stuck to the surface of the magnetic powder and blended with a magnetic paint, by suspending the magnetic powder in a kind of solution of radiation polymerization compounds, and irradiating radiation to said suspension liquid. CONSTITUTION:The magnetic powder is suspended in at least one kind of solution of radiation polymerization compounds, and radiation is irradiated to said suspension liquid. Of the ion pairs and the radicals caused by electrolytic dissociation of radiation, the radicals are mainly combined with sensitive unsaturated bonds to cause so-called radical reaction, thereby the hydrophobic thin film is securely stuck to the surface of the magnetic powder. Thus, in the case the magnetic powder which is subjected to hydrophobic treatment is blended with the magnetic paint, affinity of binder is good, distribution in paint is excellent, and packing property is improved. Since the hydrophobic thin film is a material hardened by the radical reaction, it has excellent abrasion resisting property.
JP10290379A 1979-08-13 1979-08-13 Surface treatment of magnetic powder Pending JPS5626411A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10290379A JPS5626411A (en) 1979-08-13 1979-08-13 Surface treatment of magnetic powder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10290379A JPS5626411A (en) 1979-08-13 1979-08-13 Surface treatment of magnetic powder

Publications (1)

Publication Number Publication Date
JPS5626411A true JPS5626411A (en) 1981-03-14

Family

ID=14339812

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10290379A Pending JPS5626411A (en) 1979-08-13 1979-08-13 Surface treatment of magnetic powder

Country Status (1)

Country Link
JP (1) JPS5626411A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57130230A (en) * 1981-02-04 1982-08-12 Fuji Photo Film Co Ltd Manufacture of magnetic recording material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57130230A (en) * 1981-02-04 1982-08-12 Fuji Photo Film Co Ltd Manufacture of magnetic recording material
JPH0325852B2 (en) * 1981-02-04 1991-04-09 Fuji Photo Film Co Ltd

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