GB1416200A - Process and apparatus for the production of magnetic recording meida - Google Patents

Process and apparatus for the production of magnetic recording meida

Info

Publication number
GB1416200A
GB1416200A GB5664072A GB5664072A GB1416200A GB 1416200 A GB1416200 A GB 1416200A GB 5664072 A GB5664072 A GB 5664072A GB 5664072 A GB5664072 A GB 5664072A GB 1416200 A GB1416200 A GB 1416200A
Authority
GB
United Kingdom
Prior art keywords
magnetic
support
drying
flat surface
dispersion
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
Application number
GB5664072A
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.)
BASF SE
Original Assignee
BASF SE
Badische Anilin and Sodafabrik AG
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 BASF SE, Badische Anilin and Sodafabrik AG filed Critical BASF SE
Publication of GB1416200A publication Critical patent/GB1416200A/en
Expired 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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/842—Coating a support with a liquid magnetic dispersion
    • G11B5/845—Coating a support with a liquid magnetic dispersion in a magnetic field

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

1416200 Magnetic recording media BADISCHE ANILIN- & SODA-FABRIK AG 8 Dec 1972 [9 Dec 1971] 56640/72 Heading B2E [Also in Division Dl] A process for the production of a magnetic recording medium comprises applying a layer of a fluid magnetic dispersion of uniaxially shaped magnetically anisotropic particles to a moving non-magnetisable support on a flat surface, orienting the magnetically anisotropic particles in the still fluid magnetic dispersion in a preferred direction parallel to the flat surface of the support using a uniform magnetic field whose lines of force are parallel to the flat surface and drying the dispersion at least partially within the magnetic field to form a coating and lock the magnetic particles in their oriented positions, the drying being effected at least predominantly by the preferential absorption of electromagnetic radiation by said layer compared with said support. The support may be a web of tape of a disc. The electro-magnetic radiation may be in a wavelength ranged from 0.1 to 11 u or 1 to 100 cm. The drying may be completed in the magnetic field. The magnetic dispersions may contain, in addition to the magnetic particles which may be gamma-iron (III) oxide, chromium dioxide, finely divided magnetite or ferro-magnetic metal pigments, the following binders such as epoxy resins, phenoxy resins, aminoplast precondensates, polyester resins, polyurethanes or polyurethaneforming compounds, polycarbonates, vinyl chloride and vinylidene chloride copolymers, heat-curable acrylate or methacrylate copolymers. Dispersions may contain volatile solvents such as tetrahydrofuran, toluene and methylethyl ketone. The magnetic tapes may be of cellulose acetate, polyester or polyvinyl chloride and are preferably of polyethylene terephthalate.
GB5664072A 1971-12-09 1972-12-08 Process and apparatus for the production of magnetic recording meida Expired GB1416200A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712161083 DE2161083A1 (en) 1971-12-09 1971-12-09 METHOD AND DEVICE FOR PRODUCING TAPE-SHAPED MAGNETOGRAM CARRIERS

Publications (1)

Publication Number Publication Date
GB1416200A true GB1416200A (en) 1975-12-03

Family

ID=5827499

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5664072A Expired GB1416200A (en) 1971-12-09 1972-12-08 Process and apparatus for the production of magnetic recording meida

Country Status (9)

Country Link
JP (1) JPS4866402A (en)
BR (1) BR7208674D0 (en)
CA (1) CA988787A (en)
DE (1) DE2161083A1 (en)
FR (1) FR2162608A1 (en)
GB (1) GB1416200A (en)
IT (1) IT973973B (en)
NL (1) NL7216641A (en)
PL (1) PL79152B1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0147746A2 (en) * 1983-12-16 1985-07-10 Nissin-High Voltage Co., Ltd. Electron beam irradiation apparatus
US4578280A (en) * 1983-03-08 1986-03-25 Agfa-Gevaert Aktiengesellschaft Process for the production of a magnetic recording material with perpendicular orientation
US4645686A (en) * 1983-11-10 1987-02-24 Bellmatic, Ltd. Method for smoothing magnetic recording media
US4678682A (en) * 1982-05-20 1987-07-07 Fuji Photo Film Co., Ltd. Process for producing magnetic recording medium
US4696831A (en) * 1985-02-14 1987-09-29 Hitachi, Ltd. Method of orienting magnetic disc by magnetic field
US4874633A (en) * 1985-10-18 1989-10-17 Fuji Photo Film Co., Ltd. Method of producing magnetic recording medium

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52141612A (en) * 1976-05-20 1977-11-26 Hitachi Maxell Method of producing magnetic recording media
JPS5410205U (en) * 1977-06-24 1979-01-23
DE2741341B2 (en) * 1977-09-14 1980-02-14 Basf Ag, 6700 Ludwigshafen Process for the production of magnetic recording media
JPS56117336A (en) * 1980-02-19 1981-09-14 Sony Corp Manufacture of magnetic recording medium
JPS56119938A (en) * 1980-02-22 1981-09-19 Sony Corp Production of magnetic recording medium
DE3010873A1 (en) * 1980-03-21 1981-10-01 Basf Ag, 6700 Ludwigshafen MAGNETIZING DEVICE FOR GENERATING A MAGNETIC PREFERRED DIRECTION IN MAGNETIC RECORDING CARRIERS
JPS57113657U (en) * 1980-12-29 1982-07-14
EP0094452A3 (en) * 1982-05-19 1986-01-02 International Business Machines Corporation Production of magnetic recording medium with vertically oriented acicular particles
JPH06103530B2 (en) * 1982-05-20 1994-12-14 富士写真フイルム株式会社 Manufacturing method of magnetic recording medium
JPH0656656B2 (en) * 1983-10-03 1994-07-27 富士写真フイルム株式会社 Method of manufacturing magnetic recording medium

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4678682A (en) * 1982-05-20 1987-07-07 Fuji Photo Film Co., Ltd. Process for producing magnetic recording medium
US4578280A (en) * 1983-03-08 1986-03-25 Agfa-Gevaert Aktiengesellschaft Process for the production of a magnetic recording material with perpendicular orientation
US4645686A (en) * 1983-11-10 1987-02-24 Bellmatic, Ltd. Method for smoothing magnetic recording media
EP0147746A2 (en) * 1983-12-16 1985-07-10 Nissin-High Voltage Co., Ltd. Electron beam irradiation apparatus
EP0147746A3 (en) * 1983-12-16 1987-01-07 Nissin High-Voltage Co., Ltd. Electron beam irradiation apparatus
US4696831A (en) * 1985-02-14 1987-09-29 Hitachi, Ltd. Method of orienting magnetic disc by magnetic field
US4874633A (en) * 1985-10-18 1989-10-17 Fuji Photo Film Co., Ltd. Method of producing magnetic recording medium

Also Published As

Publication number Publication date
JPS4866402A (en) 1973-09-12
BR7208674D0 (en) 1973-09-27
NL7216641A (en) 1973-06-13
FR2162608A1 (en) 1973-07-20
IT973973B (en) 1974-06-10
PL79152B1 (en) 1975-06-30
DE2161083A1 (en) 1973-06-14
CA988787A (en) 1976-05-11

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee