New Composite-Carrier for Electrophotographic Developers
Abstract:A new composite-carrier based on magnetic particles and phenol resin has been developed for long-life electrophotographic developers. The present carrier, composed of core particles and a resin shell, is quite spherical in shape and is characterized by a narrow particle-size distribution (controllable range: 10-200 μm in diameter). The carrier core can either be made up of magnetic fine particles such as ferrites and magnetites, or of non-magnetic particles such as hematites. The content of the core particles can be as high as 90 wt%. The core particles were prepared by dispersing magnetic or non-magnetic fine particles in an aqueous solution of phenol and formaldehyde using ammonium as an initiator. The surface of the core particles was then coated with silicone resin. The composite-carrier thus prepared exhibits an excellent performance in charging and charge-holding properties that greatly exceeds the characteristics of commercial ferrite-carriers.
Document Type: Research Article
Publication date: January 1, 2000
For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.
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