Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1989-12-22
1991-08-06
McCamish, Marion E.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
G03G 1314
Patent
active
050377183
ABSTRACT:
A method is provided for non-electrostatically transferring dry toner particles which comprise a toner binder and have a particle size of less than 8 micrometers from the surface of an element which has a surface layer comprising a film-forming, electrically insulating polyester or polycarbonate thermoplastic polymeric binder resin matrix and a surface energy of not greater than approximately 47 dynes/cm, preferably from about 40 to 45 dynes/cm, to a receiver which comprises a substrate having a coating of a thermoplastic condensation polymer on a surface of the substrate in which the Tg of the polymer is less than approximately 10.degree. C. above the Tg of the toner binder and the surface energy of the thermoplastic polymer coating is approximately 38 to 43 dynes/cm by contacting the toner particles with the receiver which is heated to a temperature such that the temperature of the thermoplastic polymer coating on the receiver substrate during transfer is at least approximately 5.degree. C. above the Tg of the thermoplastic polymer whereby virtually all of the toner particles are transferred from the surface of the element to the thermoplastic polymer coating on the receiver substrate and the thermoplastic polymer coating is prevented from adhering to the element surface during transfer in the absence of a layer of a release agent on the thermoplastic polymer coating or the element. After transfer, the receiver is separated from the element while the temperature of the thermoplastic polymer coating is maintained above the Tg of the thermoplastic polymer.
The method is particularly well suited for providing images having high resolution and low granularity from very small size toner particles.
REFERENCES:
patent: 4533611 (1985-08-01), Winkelmann et al.
patent: 4868078 (1989-09-01), Sakai et al.
patent: 4927727 (1990-05-01), Rimai et al.
patent: 4968578 (1990-11-01), Light et al.
Light et al., U.S. Application 07/345,160, filed 4/28/89, CIP of 07/230,381, filed 8/9/88.
Light William A.
Rimai Donald S.
Sorriero Louis J.
Crossan S.
Eastman Kodak Company
McCamish Marion E.
Montgomery Willard G.
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