System for separating electrophotographic carrier compositions and recycling the compositions
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United States of America Patent
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Feb 27, 2007
Grant Date -
Jul 10, 2003
app pub date -
Jul 16, 2002
filing date -
Jul 28, 1999
priority date (Note) -
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Abstract
A method for use in two-components electrostatic image developers is disclosed, in which secure separation of a carrier coating resinous materials from a core magnetic material is achieved without affecting the properties of the core materials through process steps benign to the environment in super- or sub-critical water compositions under the conditions of a temperature of 300.degree. C. or more and a pressure of 20 MPa. The core magnetic material is subsequently recycled for forming carrier. This method may also be useful for processing waste including magnetic materials with silicone resin coating.
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