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Title:
MANUFACTURE OF MAGNETIC RECORDING MEDIUM
Document Type and Number:
Japanese Patent JPS59135631
Kind Code:
A
Abstract:

PURPOSE: To facilitate the cutting of a magnetic recording medium, to prevent the stripping of the magnetic layer during cutting, and to obtain a smooth cut face by cutting the medium contg. a compound polymerizable with electron beams and by irradiating electron beams.

CONSTITUTION: A compound having two or more acryloyl or methacryloyl groups in the molecule is used as a compound polymerizable with electron beams and having two or more C-C unsatd. bonds in the molecule. A magnetic layer coated on a support is optionally treated to orient magnetic powder in the layer, and it is dried. The surface of the magnetic layer is smoothened by calendering with two specular rolls or a specular roll and an elastic roll. Cutting is carried out by a slitting methed, and in case of a sheetlike medium such as a disk, a share cutting system by punching may be applied. Electron beams are irradiated after cutting. Before carrying out the irradiation, electron beams may be irradiated immediately after the coating or orientation or before or after the smoothening.


Inventors:
Okita, Tsutomu
Komine, Shigeo
Application Number:
JP1983000008180
Publication Date:
August 03, 1984
Filing Date:
January 21, 1983
Export Citation:
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Assignee:
FUJI PHOTO FILM CO LTD
International Classes:
G11B5/842; G11B5/702; (IPC1-7): G11B5/84



 
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