Method for preparation of printing plate by electrophotographic

Details Method for preparation of printing plate by electrophotographic Method for preparation of printing plate by electrophotographic

1995-06-20

1996-12-31

Goodrow, John

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

To produce printing surface

430126, G03G 1332

Patent

active

055893082

ABSTRACT:
A method for preparation of a printing plate by an electrophotographic process comprising forming a peelable transfer layer capable of being removed upon a chemical reaction treatment on a surface of an electrophotographic light-sensitive element, forming a toner image by an electrophotographic process on the transfer layer, heat-transferring the toner image together with the transfer layer onto a receiving material having a surface capable of providing a hydrophilic surface suitable for lithographic printing at the time of printing, and removing the transfer layer on the receiving material upon the chemical reaction treatment wherein the transfer layer has a stratified structure composed of a first transfer layer (T.sub.1) which is contact with the surface of electrophotographic light-sensitive element and is formed by an electrodeposition coating method using thermoplastic resin grains (AL) each containing a rein (A.sub.1) having a glass transition point of from 10.degree. C. to 140.degree. C. or a softening point of from 35.degree. C. to 180.degree. C. and a resin (A.sub.2) having a glass transition point of not more than 45.degree. C. or a softening point of not more than 60.degree. C. wherein the glass transition point or softening point of resin (A.sub.1) is at least 2.degree. C. higher than that of resin (A.sub.2) and a second transfer layer (T.sub.2) provided thereon mainly containing a resin (A.sub.2).
The transfer layer according to the present invention has excellent transferability onto a receiving material under transfer conditions of low temperature and high speed to form transferred images of good qualities thereby providing a printing plate which produces prints of good image qualities.

REFERENCES:
patent: 5165343 (1992-11-01), Inoue et al.
patent: 5395721 (1995-03-01), Kato et al.
patent: 5501929 (1996-03-01), Kato et al.

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