Method for making polyimide coated conductors in a continuous ma

Details Method for making polyimide coated conductors in a continuous ma Method for making polyimide coated conductors in a continuous ma

1974-08-15

1976-08-10

Lusignan, Michael R.

Stock material or miscellaneous articles

Composite

Of metal

204181, B01K 502, C23B 1300

Patent

active

039743241

ABSTRACT:
A continuous method is provided for making polyimide coated conductors, such as wire and metal foil, by continuously passing the conductor into an aqueous plural solvent polyamide acid salt electrocoating bath. Electrodeposition can be effected of polyamide acid having sufficient organic solvent to produce a satisfactory polyimide film by passing the polyamide acid treated conductor through a curing tower. The electrocoating bath can be continuously maintained by use of a semi-permeable membrane allowing for continuous plural solvent and base removal, while makeup aqueous plural solvent polyamide acid salt mixture is continuously introduced into the bath. A polyimide coated aluminum foil useful for making transformer windings is also included.

REFERENCES:
patent: 3454445 (1969-07-01), Durst et al.
patent: 3679632 (1972-07-01), Flowers et al.
patent: 3714131 (1973-01-01), Hoback et al.
patent: 3778411 (1973-12-01), Emerick et al.

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