The tandem color engines have entered the mainstream of electrophotographic color technologies. High durability and high stabilization in repeated electrophotographic cycles are the important properties for the organic photoreceptor to meet this trend. Therefore we have developed an organic photoreceptor having a protective layer, coated on the surface of a conventional organic photoreceptor. Assuming that the protective layer should possess both the abrasion resistance and the sufficient charge transport ability, a protective layer containing fine rigid particles was developed to achieve those requirements. Furthermore, we have developed the coating technology suitable for making the protective layer on the organic photoreceptor surface. This newly developed organic photoreceptor was used in Ricoh Aficio AP3800C launched into market in September 2001 and has been applied to other color engines of Ricoh since then. Here we introduce an outline of the technologies adopted in the new organic photoreceptor with the high durability and stability.
Shinji Nohsho, Ryohichi Kitajima, Takaaki Ikegami, Tetsuro Suzuki, Tatsuya Niimi, Narihito Kojima, "A High-Endurance Organic Photoreceptor Having a Filler-Reinforced Layer" in Proc. IS&T Int'l Conf. on Digital Printing Technologies (NIP22), 2006, pp 4 - 7, https://doi.org/10.2352/ISSN.2169-4451.2006.22.1.art00002_1