TONER

• US 20130288173A1
• Filed: 04/22/2013
• Published: 10/31/2013
• Est. Priority Date: 04/27/2012
• Status: Abandoned Application

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Fujikawa, Hiroyuki, Komatsu, Nozomu, Kaneko, Hideki, Hashimoto, Takeshi, Iwasaki, Yosuke, Kanno, Ichiro
• Application Number:
  US13/867,398
• Publication Number:
  US 20130288173A1
• Time in Patent Office: Days
• US Class Current: 430/109.3
• CPC Class Codes: G03G 9/081 by mixing the toner components in a liquefied state; melt kneading; reactive mixing
• CPC Class Codes: G03G 9/0815 Post-treatment
• CPC Class Codes: G03G 9/0827 characterised by their shape, e.g. degree of sphericity
• CPC Class Codes: G03G 9/08704 Polyalkenes
• CPC Class Codes: G03G 9/08706 Polymers of alkenyl-aromatic compounds
• CPC Class Codes: G03G 9/08708 Copolymers of styrene
• CPC Class Codes: G03G 9/08755 Polyesters
• CPC Class Codes: G03G 9/08782 Waxes
• CPC Class Codes: G03G 9/08786 Graft polymers
• CPC Class Codes: G03G 9/08797 characterised by their physical properties, e.g. viscosity, solubility, melting temperature, softening temperature, glass transition temperature
• CPC Class Codes: G03G 9/09716 treated with organic compounds
• CPC Class Codes: G03G 9/09725 Silicon-oxides; Silicates

Abstract

Provided is a toner that has excellent low-temperature fixability, hot offset resistance, high image glossiness and fixing wraparound resistance, as well as high durable stability. The toner includes toner particles that contain a binder resin, a colorant and a wax, and fine inorganic particles on a surface of the toner particles, wherein the binder resin contains a polyester resin A and a styrene resin B, and a content ratio A/B of the polyester resin A and the styrene resin B is 85/15 or more and 98/2 or less based on mass, the styrene resin B has a weight average molecular weight Mw of a tetrahydrofuran soluble component of 2,000 or more and 5,000 or less, and the toner has been subjected to a hot-air surface treatment.

Claims

1. A toner comprising toner particles, each of which contains a binder resin, a colorant and a wax, wherein,

the toner further comprises fine inorganic particles on a surface of the toner particles, the binder resin contains a polyester resin A and a styrene resin B, and a content ratio A/B of the polyester resin A and the styrene resin B is 85/15 or more and 98/2 or less based on mass,

the styrene resin B has a weight average molecular weight Mw of a tetrahydrofuran soluble component of 2,000 or more and 5,000 or less, and wherein,

the toner particles have been subjected to a surface treatment by hot-air.

2. The toner according to claim 1, wherein the toner particles comprise a polymer C having a structure in which a vinyl resin component and a hydrocarbon compound are linked.

3. The toner according to claim 2, wherein the polymer C is a polymer having a structure in which a vinyl resin component is graft-polymerized to polyethylene.

4. The toner according to claim 2, wherein a content of the polymer C is 2 parts by mass or more and 10 parts by mass or less based on 100 parts by mass of the binder resin.

5. The toner according to claim 1, wherein the polyester resin A has a peak molecular weight Mp of a tetrahydrofuran soluble component of 2,500 or more and 6,000 or less.

6. The toner according to claim 1, wherein the polyester resin A has a glass transition temperature of 40°

C. or more and less than 70°

C.

7. The toner according to claim 1, wherein the toner has an average circularity of 0.950 or more and 0.980 or less.

8. The toner according to claim 1, wherein the hot-air is 100°

C. or more and 450°

C. or less.