Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Molecular aligning or molecular orientating
Patent
1997-08-13
1999-12-14
Ortiz, Angela
Plastic and nonmetallic article shaping or treating: processes
Direct application of electrical or wave energy to work
Molecular aligning or molecular orientating
264448, 264451, 264440, 4251748E, 4251748R, B29C 3308, B29C 3512
Patent
active
060012994
ABSTRACT:
A process for electret treatment is described, involving
(1) placing the dielectric article between a combination of a first ion-repulsive electrode and a first ion-attractive electrode and between a combination of a second ion-repulsive electrode and a second ion-attractive electrode, under a specified arrangement;
(2) supplying a first positive ion and a first negative ion from a first ion generating means between the dielectric article and the first ion-repulsive electrode, the first ion generating means being selected from an alternating current surface discharge element and an alternating current corona-type ion generating element;
(3) applying a direct current voltage between the first ion-repulsive electrode and the first ion-attractive electrode to produce a first potential difference therebetween, whereby only one of the first positive and negative ions is moved in a specified direction, and is transferred on the dielectric article;
(4) supplying a second positive ion and a second negative ion from a second ion generating means between the dielectric article and a second ion-repulsive electrode, the second ion generating means being selected from specified elements; and
(5) applying a direct current voltage between the second ion-repulsive electrode and the second ion-attractive electrode to produce a second potential difference therebetween, whereby only the second ion having polarity opposite to polarity of the first ion transferred on the dielectric article is moved in a specified direction, and is transferred on the dielectric article.
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Ito Daisuke
Kawabe Masaaki
Japan Vilene Company Ltd.
Ortiz Angela
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