Thermally resistant magnetic tape enclosed in protective contain

Details Thermally resistant magnetic tape enclosed in protective contain Thermally resistant magnetic tape enclosed in protective contain

1976-01-02

1978-05-30

Dixson, Jr., William T.

Special receptacle or package

For roll or reel

1791001R, 428539, B65D 8567, B65D 85671, G11B 572, G11B 2302

Patent

active

040919242

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: 2976371 (1961-03-01), Bell
patent: 3327067 (1967-06-01), Boniface
patent: 3507694 (1970-04-01), Eichler et al.

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