Stable electret retaining a high surface potential and method of

Details Stable electret retaining a high surface potential and method of Stable electret retaining a high surface potential and method of

1974-05-08

1976-06-29

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

156272, 156297, 156334, 179111E, 204165, 307 88ET, 428213, 428215, 428334, 428335, 428336, 428409, 428412, 428421, 428480, 428483, 428520, 428522, B32B 702, B32B 704, B32B 3112

Patent

active

039670279

ABSTRACT:
A layered electret retaining a high surface potential for a prolonged period of time or substantially permanently consisting of a laminate of a plurality of unit electrets which are formed of a sheet of a synthetic plastic material, each side of the laminate having been covered by a thin film of a high molecular weight substance having a higher electric resistivity than that of the material of the unit electrets. In one modification, the thin film of the high molecular weight substance has been, in addition, interposed between adjacent unit electrets.

REFERENCES:
patent: 2740184 (1956-04-01), Thomas
patent: 3000735 (1961-09-01), Gunning
patent: 3154428 (1964-10-01), Cochrane
patent: 3380983 (1968-04-01), Siegart
patent: 3390104 (1968-07-01), Miller
patent: 3449093 (1969-06-01), Baxt
patent: 3458713 (1969-07-01), Perlman
patent: 3612778 (1970-04-01), Murphy
patent: 3755043 (1973-08-01), Igarashi

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