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US 8,785,093 B2Granted
Image forming toner, and developer and process cartridge using the toner
AssigneeRicoh Company, Ltd.
InventorsToyoshi Sawada, Tomomi Suzuki, Tsuneyasu Nagatomo, Satoshi Kojima
Life of this patent
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Abstract
An image forming toner, including a mother particle including a paraffin wax having a melting point of from 60 to 90° C. and a binder resin, wherein the mother particle has an endothermic peak of the paraffin wax of from 2.0 J/g to 5.5 J/g when measured by a DSC and an aspect ratio of from 0.8 to 0.90.
Claims9
A developer, comprising:
- (A) an image forming toner comprising:
- (i) a mother particle, comprising:
- (1-a) a paraffin wax having a melting point of from 60 to 90° C.;
- and
- (1-b) a binder resin comprising a polyester resin,
- wherein the mother particle has an endothermic peak of the paraffin wax of from 2.0 J/g to 5.5 J/g when measured by a DSC and an aspect ratio of from 0.8 to 0.90, and
- wherein the mother particle has a shape factor SF-1 of from 130 to 160 and SF-2 of from 110 to 140;
- and
- (B) a carrier coated with at least one of an acrylic resin a silicone resin.
6 more elements
Dependencies are inferred from the claim text.