# US 2014/0370426 A1 · Non-magnetic single-component toner, electrostatic charge image developer, and process cartridge > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0370426 A1 - Document ID: US20140370426A1 - Status: Published application - Kind: A1 - Application number: 14/061,116 - Filed: 2013-10-23 - Published: 2014-12-18 - Earliest claimed: 2013-06-12 - Assignees: Fuji Xerox Co., Ltd. - Applicants: Fuji Xerox Co., Ltd. - Inventors: Daisuke ISHIZUKA; Shinichi YAOI; Tomoaki TANAKA; Seijiro ISHIMARU; Kotaro YOSHIHARA; Yasushige NAKAMURA - Web page: https://patentgrep.com/patent/US20140370426A1 ## CPC - G03G 9/08755: {Polyesters} - G03G 9/08782: {Waxes} - G03G 9/08795: {characterised by their chemical properties, e.g. acidity, molecular weight, sensitivity to reactants} - G03G 9/08797: {characterised by their physical properties, e.g. viscosity, solubility, melting temperature, softening temperature, glass transition temperature} - G03G 9/09733: {Organic compounds (G03G9/08782 takes precedence)} - G03G 21/18: using a processing cartridge {, whereby the process cartridge comprises at least two image processing means in a single unit} - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract A non-magnetic single-component toner includes a toner base particle that contains at least a binder resin and a colorant, and an external additive, wherein the external additive includes an organic particle and an inorganic particle, the binder resin contains at least an amorphous polyester resin and a crystalline polyester resin, an endothermic peak of the crystalline polyester resin obtained by differential scanning calorimetry is from 50° C. to 100° C., the organic particle contains at least one kind selected from a group consisting of higher fatty acid, higher alcohol, fatty acid ester, and fatty acid amide, and the inorganic particle is treated with silicone oil. ## Claims ### Claim 1 A non-magnetic single-component toner comprising: a toner base particle that contains at least a binder resin and a colorant, and an external additive, wherein the external additive includes an organic particle and an inorganic particle, the binder resin contains at least an amorphous polyester resin and a crystalline polyester resin, an endothermic peak of the crystalline polyester resin obtained by differential scanning calorimetry is from 50° C. to 100° C., the organic particle contains at least one kind selected from a group consisting of higher fatty acid, higher alcohol, fatty acid ester, and fatty acid amide, and the inorganic particle is treated with silicone oil. ### Claim 2 (depends on 1) The non-magnetic single-component toner according to claim 1, wherein the organic particle contains fatty acid ester and/or fatty acid amide. ### Claim 3 (depends on 1) The non-magnetic single-component toner according to claim 1, wherein an average circularity of the organic particle is from 0.70 to 0.95. ### Claim 4 (depends on 1) The non-magnetic single-component toner according to claim 1, wherein a number average particle size of the organic particle is from 0.5 μm to 15 μm. ### Claim 5 (depends on 1) The non-magnetic single-component toner according to claim 1, wherein the organic particle is solid at 25° C., and a melting point is equal to or higher than 50° C. ### Claim 6 (depends on 1) The non-magnetic single-component toner according to claim 1, wherein the higher fatty acid is saturated fatty acid having 12 or more carbon atoms. ### Claim 7 (depends on 1) The non-magnetic single-component toner according to claim 1, wherein the higher alcohol is a monovalent aliphatic alcohol having 14 or more carbon atoms. ### Claim 8 (depends on 1) The non-magnetic single-component toner according to claim 1, wherein the fatty acid ester is ester of a monovalent fatty acid and a monovalent or polyvalent aliphatic alcohol. ### Claim 9 (depends on 1) The non-magnetic single-component toner according to claim 1, wherein the fatty acid amide is at least one kind selected from a group consisting of saturated fatty acid amide, unsaturated fatty acid amide, and N-substituted fatty acid amide. ### Claim 10 (depends on 1) The non-magnetic single-component toner according to claim 1, wherein, in the silicone oil-treated inorganic particle, an amount of free silicone oil with respect to the weight of the inorganic particle is from 3% by weight to 20% by weight. ### Claim 11 (depends on 1) The non-magnetic single-component toner according to claim 1, wherein, when the content of the organic particle is set to w1 parts by weight and the content of the inorganic particle is set to w2 parts by weight with respect to 100 parts by weight of the toner base particle, w1/w2 is from 0.05 to 3.0. ### Claim 12 (depends on 1) The non-magnetic single-component toner according to claim 1, wherein an added amount of the organic particle with respect to 100 parts by weight of the toner base particle is from 0.1 part by weight to 5 parts by weight. ### Claim 13 (depends on 1) The non-magnetic single-component toner according to claim 1, wherein an added amount of the inorganic particle with respect to 100 parts by weight of the toner base particle is from 0.3 part by weight to 6 parts by weight. ### Claim 14 (depends on 1) The non-magnetic single-component toner according to claim 1, wherein an added amount of the inorganic particle with respect to 100 parts by weight of the toner base particle is from 0.4 part by weight to 5.5 parts by weight. ### Claim 15 (depends on 1) The non-magnetic single-component toner according to claim 1, wherein the non-magnetic single-component toner has a positive charging property. ### Claim 16 (depends on 1) The non-magnetic single-component toner according to claim 1, wherein a number average particle size of the silicone oil-treated inorganic particle is from 20 nm to 800 nm. ### Claim 17 (depends on 1) The non-magnetic single-component toner according to claim 1, wherein a weight-average molecular weight of the binder resin is from 4,000 to 100,000. ### Claim 18 (depends on 1) The non-magnetic single-component toner according to claim 1, wherein a content of the crystalline polyester resin with respect to toner is from 3% by weight to 40% by weight. ### Claim 19 (depends on 1) An electrostatic charge image developer containing the non-magnetic single-component toner according to claim 1. ### Claim 20 (depends on 19) A process cartridge that is detachable from an image forming apparatus, accommodates the electrostatic charge image developer according to claim 19, and includes a development unit that develops an electrostatic latent image formed on a surface of an image holding member by the electrostatic charge image developer to form a toner image.