Electrostatic latent image developing toner
AssigneeKonica Minolta Business Technologies, Inc.
InventorsYasumitsu Fujino, Noboru Ueda, Seishi Ojima, Mitsutoshi Nakamura, Hideaki Ueda
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Abstract
An electrostatic latent image developing toner contains toner particles each of which has a shell layer on the surface of a core particle comprising at least a first binder resin having a softening point of less than 100° C., a second binder resin having a softening point of not less than 100° C. and a colorant, being applicable to a low-temperature fixing process, and making it possible to achieve conflict functions, such as a heat-resistant storing property, mechanical strength and charge environmental stability.
Claims16
An electrostatic latent image developing toner comprising:
- toner particles each of which has a shell layer on the surface of a core particle comprising at least a first binder resin having a softening point of less than 100° C., a second binder resin having a softening point of not less than 100° C., was and a colorant, wherein the core particle is formed by allowing at least first binder resin particles, second binder resin particles and colorant particles to aggregate/fusion-adhere to one another, and a process in which the shell layer is formed by allowing shell-layer-forming binder resin particles to adhere/fuse onto the surface of the core particle is carried out;
- wherein the shell layer has a multiple layer structure with two or more layers and the constituent resin of the outermost layer has a glass transition point of 55-75° C.
An electrostatic latent image developing toner comprising:
- toner particles each of which has a shell layer on the surface of a core particle comprising at least a first binder resin having a softening point of less than 100° C., a second binder resin having a softening point of not less than 100° C., wax and a colorant, wherein the core particle is formed by allowing at least first binder resin particles, second binder resin particles and colorant particles to aggregate/fusion-adhere to one another, and a process in which the shell layer is formed by allowing shell-layer-forming binder resin particles to adhere/fuse onto the surface of the core particle is carried out;
- wherein the shell layer has a multiple layer structure with two or more layers, and the constituent resin of the outermost layer has a glass transition point of 55-75° C. and a softening point of 100-160° C.
Dependencies are inferred from the claim text.