Method for applying plural liquids to continuously moving nonmag

Details Method for applying plural liquids to continuously moving nonmag Method for applying plural liquids to continuously moving nonmag

1990-03-12

1991-02-19

Pianalto, Bernard

Coating processes

Magnetic base or coating

Magnetic coating

428900, H01F 1002, B05D 512

Patent

active

049943065

ABSTRACT:
A method of simultaneously applying a plurality of liquids to a carrier to form respective layers thereon without causing a chromatic nonuniformity or longitudinal streaking in the layers, and to thus stably manufacture a magnetic recording medium of good magnetic recording properties. Liquids containing organic solvents are simultaneously applied to a continuously moving nonmagnetic carrier by an application head of the extrusion type so as to form respective plural layers on the carrier to manufacture a magnetic recording medium. The difference between the viscosities of the liquids present in the slots of the application head and which are to be applied to the carrier to form at least mutually adjacent ones of the layers is set at 50 cp or less, or the difference between the viscosities of the liquids present in the pockets of the application head or is set at 500 cp or less.

REFERENCES:
patent: 4746542 (1988-05-01), Chino et al.
patent: 4921729 (1990-05-01), Kaneko et al.

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