Particle Size-Selective Transfer

• For every jumping powder development the competition between adhesion forces and the local electrical pull-off force determines whether development (transfer) is possible or not. With the general assumption that the toner charge is proportional to rn, n ≤ 2 for small particles, while for some developer systems it tends to become proportional to r for larger sizes, a theoretical model for this phenomenon was developed. Our calculations predict the influence of magnetic adhesion, toner charge, nonuniform toner surface-charge density, choice of materials, and electrical field strength on a particle size-selective development. A strong indication of the relation between nonuniform toner surface-charge density and particle size-selective transfer is presented. Also an explanation of particle size-segregated toner layers is suggested. Ideas on how to decrease the selectivity are suggested on the basis of our investigation.

Ämnesord

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Annan materialteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Other Materials Engineering (hsv//eng)

LANTBRUKSVETENSKAPER  -- Lantbruksvetenskap, skogsbruk och fiske -- Fisk- och akvakulturforskning (hsv//swe)

AGRICULTURAL SCIENCES  -- Agriculture, Forestry and Fisheries -- Fish and Aquacultural Science (hsv//eng)

Nyckelord

toner particles

triboelectric charging

Publikations- och innehållstyp

kon (ämneskategori)

ref (ämneskategori)