TONER

• US 20160363877A1
• Filed: 06/08/2016
• Published: 12/15/2016
• Est. Priority Date: 06/15/2015
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Hama, Masayuki, Kaneko, Hideki, Hashimoto, Takeshi, Kanno, Ichiro, Komatsu, Nozomu, Kobori, Takakuni, Fujikawa, Hiroyuki
• Granted Patent: US 10,082,743 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G03G 9/0825 characterised by their structure; characterised by non-homogenuous distribution of components microcapsular toners G03G9/093
• CPC Class Codes: G03G 9/08755 Polyesters
• CPC Class Codes: G03G 9/08795 characterised by their chemical properties, e.g. acidity, molecular weight, sensitivity to reactants
• CPC Class Codes: G03G 9/08797 characterised by their physical properties, e.g. viscosity, solubility, melting temperature, softening temperature, glass transition temperature

Abstract

A toner comprising a toner particle containing a crystalline polyester resin and an amorphous polyester resin, wherein, in a cross-sectional observation of the toner by transmission electron microscopy (TEM), the number-average diameter (D1) of major axis lengths of the crystalline polyester resin dispersed up to a depth of 0.30 μm from a toner surface is 40 nm to 110 nm, and the number-average diameter (D1) of major axis lengths of the crystalline polyester resin dispersed deeper than 0.30 μm from the toner surface is 1.25 to 4.00 times the number-average diameter (D1) of the major axis lengths of the crystalline polyester resin dispersed up to a depth of 0.30 μm from the toner surface.

Claims

1. A toner comprising a toner particle containing a crystalline polyester resin and an amorphous polyester resin, wherein

in a cross-sectional observation of the toner by transmission electron microscopy (TEM),

the number-average diameter (D1) of major axis lengths of the crystalline polyester resin dispersed up to a depth of 0.30 μ

m from a toner surface is from 40 nm to 110 nm, and

the number-average diameter (D1) of major axis lengths of the crystalline polyester resin dispersed deeper than 0.30 μ

m from the toner surface is from 1.25 to 4.00 times the number-average diameter (D1) of the major axis lengths of the crystalline polyester resin dispersed up to a depth of 0.30 μ

m from the toner surface.

2. The toner according to claim 1, wherein the number-average diameter (D1) of the major axis lengths of the crystalline polyester resin dispersed deeper than 0.30 μ

m from the toner surface is from 60 nm to 300 nm.

3. The toner according to claim 1, wherein the aspect ratio of the crystalline polyester resin dispersed deeper than 0.30 μ

m from the toner surface is from 6.0 to 30.0.

4. The toner according to claim 1, having a maximum value of from 80 nm to 200 nm in the number distribution of the major axis lengths of the crystalline polyester resin dispersed deeper than 0.30 μ

m from the toner surface, and

having a maximum value of from 50 to 100 nm in the number distribution of the major axis lengths of the crystalline polyester resin dispersed up to a depth of 0.30 μ

m from the toner surface.