US 7,842,446 B2 · Toner

Abstract

An object of the present invention is to provide a toner excellent in durability and storage stability, and having good fixing performance in a wide fixing temperature region even at a high process speed. According to the present invention, there is provided a toner containing: a binder resin; a colorant; and a polyester resin, in which: I) the polyester resin contains at least, as a main component, polyester obtained by subjecting a monomer composition containing an alcohol selected from aliphatic diols each having 2 to 22 carbon atoms and a carboxylic acid selected from aliphatic dicarboxylic acids each having 2 to 22 carbon atoms to a polycondensation reaction; and II) a region having a lamellar structure is present at a surface layer of the toner.

Claims11

Dependent claims

A toner comprising:

a binder resin, a colorant, a releasing agent and a polyester resin, the toner having an average circularity of 0.950 or more, wherein:
(a) the polyester resin contains at least, as a main component, a crystalline polyester component obtained by subjecting a monomer composition containing, as main components, an alcohol selected from aliphatic diols each having 2 to 22 carbon atoms and a carboxylic acid selected from aliphatic dicarboxylic acids each having 2 to 22 carbon atoms to a polycondensation reaction;
and
(b) a region having a lamellar structure formed of the crystalline polyester component and present at a surface layer of the toner, wherein a ratio (Wc/Pc) of a content mass (Wc) of the releasing agent to a content mass (Pc) of the crystalline polyester component is 0.5 to 8.0.

1 more element

Dependencies are inferred from the claim text.

Toner

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Toner

Life of this patent

Abstract

Claims11