Thermally resistant magnetic tape

Details Thermally resistant magnetic tape Thermally resistant magnetic tape

1973-11-19

1976-03-02

Pianalto, Bernard D.

Stock material or miscellaneous articles

Composite

Of aldehyde or ketone condensation product

428538, 428539, 428900, H01F 1002

Patent

active

039419118

ABSTRACT:
An improved magnetic tape having the property of retaining magnetic data even when spooled and subjected to high temperature environments. This thermal resistance is suitably achieved by providing a backing coating which contacts the magnetic-particle-bearing facing coating of the tape and is chemically incompatible therewith. Pairs of chemically-incompatible coatings include polyester polyurethane-polyether-polyurethane; polyfluorinated hydrocarbons-polyurethane. A conductive furnace carbon black is advantageously used in the backing coating, and the substrate is, suitably, temperature-resistant polyimide.

REFERENCES:
patent: 2871218 (1959-01-01), Schollenberger
patent: 2899411 (1959-08-01), Schollenberger
patent: 3293066 (1966-12-01), Haines
patent: 3320090 (1967-05-01), Graubart
patent: 3384679 (1968-05-01), Stetz
patent: 3484286 (1969-12-01), Beck et al.
patent: 3617378 (1971-11-01), Beck
patent: 3649541 (1972-03-01), Ingersoll

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