Solvent-cast capacitive high density information disc

Details Solvent-cast capacitive high density information disc Solvent-cast capacitive high density information disc

1983-11-29

1985-05-07

Schofer, Joseph L.

Coating processes

Electrical product produced

Carbon coating

4273855, 524495, 523174, 523333, 264105, 369286, 369288, 106 37, 252511, 358342, B05D 512, C04B 3500, C09K 300

Patent

active

045158304

ABSTRACT:
Sandwich-type capacitive electronic discs having thin conductive layers are prepared by adding a thermally processed conductive molding composition comprising a thermoplastic resin, conductive carbon black particles and suitable additives to a suitable solvent to form a dispersion of the conductive carbon black in a solution of the remaining ingredients. The dispersion is filtered to remove impurities larger than a predetermined particle size and coated onto a core disc. The coating is dried to form a conductive layer which is embossed with the desired information.

REFERENCES:
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patent: 3772081 (1973-11-01), Franer
patent: 3842194 (1974-10-01), Clemens
patent: 4113897 (1978-09-01), Nosker
patent: 4228050 (1980-10-01), Martin et al.
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patent: 4267212 (1981-05-01), Sakawaki
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patent: 4390487 (1983-06-01), O'Mara
patent: 4416807 (1983-11-01), Datta et al.
patent: 4430460 (1984-02-01), Martin
patent: 4436683 (1984-03-01), Nishihara et al.
Ricklin, "Solvent-Cast Films", Plastics Eng'ing, vol 39, No. 5, pp. 29-33, (1983).
Japanese Patent Publication No. 49-114412, with translation.
Japanese Patent Publication No. 53-119017, with translation.
German Auslegeschrift 28 12 460, with translation.

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