Electrophotographic toner composition and image fixing process
AssigneeFuji Xerox Co., Ltd.
InventorsTakeshi Mikami, Takashi Imai
Life of this patent
Estimating the term…
Abstract
An novel electrophotographic toner composition comprising a capsule toner having a core substance containing a binder resin and a coloring agent, encapsulated with a 0.005 to 0.5 .mu.m-thick shell made of resin which comprises a polyurea and/or polyurethane having a glass transition point of 150.degree. C. or lower.
Claims18
An electrophotographic toner composition comprising a capsule toner having a core substance containing a binder resin and a coloring agent, encapsulated with an outer shell having an average thickness of 0.005 .mu.m to 0.05 .mu.m and being made of a resin which comprises a polyurea and/or a polyurethane having a glass transition point of 150.degree. C. or lower, said resin allowing permeation of the core substance upon heating at a temperature higher than a glass transition temperature of the core substance.
A process for fixing a toner composition containing a capsule toner, which comprises the steps of:
- a) providing on a sheet a toner composition containing a capsule toner which comprises a core substance having a glass transition point of 60.degree. C. or lower and being encapsulated with a shell made of a resin capable of allowing permeation of the core substance upon heating at a temperature higher than said glass transition temperature, and
- b) applying heat and pressure to said capsule toner to an extent that the shell is not ruptured, so that the core substance permeates through the shell to form a fixed image on said sheet.
A toner composition containing a capsule toner which comprises a core substance having a glass transition point of 60.degree. C. or lower and being encapsulated with a shell made of a resin capable of allowing permeation of the core substance upon heating at a temperature higher than said glass transition temperature.
Dependencies are inferred from the claim text.