Investigations in the Influence of Rounded Toner Particles on the Image Quality Parameters
The advantages and disadvantages of chemically produced toners (CPT) vs. conventionally produced toners by grinding and classifying are top of discussion. All OEM’s of CPT contend that their toners are characterized by smaller particle size, tighter particle size distributions and higher consistence in particle shape. The ideal spherical or at least “potato toner particle shape effects a higher capability of rendering better image quality. Goal of our investigations was to improve the circularity of conventionally produced toner particles and to correlate the generated particle shape and the resulting imaging quality parameters. Test material was an adjusted purchasable CPT that was prepared in the conventional way. In the first part of this presentation results of systematic investigations according to rounding conventionally produced toner particles will be presented. Extensive tests on a conventional intensive mixer Cyclomix by HOSOKAWA Micron B.V., Doetinchem/The Netherlands, and the new high-intensive mixer NOBILTA by HOSOKAWA Alpine Aktiengesellschaft, Augsburg/Germany, were conducted to evaluate optimal processing conditions. The second part deals with the consequences of rounding on printing quality parameters like solid black density, ghosting, fixing and level of grey scale, the correlation of particle circularity and printing quality parameters as well as the comparison of rounded toner particles to chemical produced toner particles. First results show that it is possible to generate the desired potato shape by intensive mixing on a Cyclomix, a kind of intensive solid mixer. The printing tests gave fully satisfying results in almost all criteria and are comparable to CPTs. In order to utilize all benefits of rounded toner quality the entire toner production process must be taken in consideration, i.e. from formulation to blending. Further investigations including trials on the NOBILTA. type, a high intensive mixer, are conducted to optimize the rounding step.
Ralf Habermann Beat Zobrist
HOSOKAWA Alpine Aktiengesellschaft, Zobrist Engineering & Consulting Augsburg / Germany, Winterthur HOSOKAWA Alpine Aktiengesellschaft, Zobrist Engineering & Consulting Augsburg / Germany, Winterthur
国际会议
The 31st International Congress on Imaging Science(第31届国际影像科学大会 ICIS2010)
北京
英文
172-175
2010-05-12（万方平台首次上网日期，不代表论文的发表时间）