US 7,115,349 B2 · Toner

Abstract

Provided is toner which is excellent in developing property, transferring property, and fixing property, hardly affected by its surrounding, and has good endurance. The toner has a peak temperature of maximum endothermic peak in the range of 60 to 100° C. in an endothermic curve of differential scanning calorimetry (DSC) measurement; silica particles in the toner contain a titanium element; and the silica particles satisfy the following expressions. 0.7≦(Ia1/Ib1)≦2.0 0.7≦(Ia2/Ib2)≦2.0 where Ia1 represents a maximum intensity in the case of 2θ=25.3 deg, Ib1 represents a mean intensity in the cases of 2θ=25.3 deg+2.0 deg. and of 2θ=25.3 deg.−2.0 deg., Ia2 represents a maximum intensity in the case of 2θ=27.5 deg and Ib2 represents a mean intensity in the cases of 2θ=27.5. deg+2.0 deg. and of 2θ=27.5 deg.−2.0 deg.

Claims13

Dependent claims

A toner comprising toner particles containing at least a binder resin, a colorant and a release agent, and silica particles, wherein:

the toner has a peak temperature of maximum endothermic peak in the range of 60 to 100° C. in a temperature ranging from 30 to 200° C. of an endothermic curve of differential scanning calorimetry (DSC) measurement;
the silica particles contain a titanium element;
and
the silica particles satisfy the following expressions,
0.7≦(Ia1/Ib1)≦2.0;
and
0.7≦(Ia2/Ib2)≦2.0
where Ia1 represents a maximum intensity in the case of 2θ=25.3 deg, Ib1 represents a mean intensity in the cases of 2θ=25.3 deg+2.0 deg. and of 2θ=25.3 deg.−2.0 deg., Ia2 represents a maximum intensity in the case of 2θ=27.5 deg and Ib2 represents a mean intensity in the cases of 2θ=27.5. deg+2.0 deg. and of 2θ=27.5 deg.−2.0 deg.

5 more elements

Dependencies are inferred from the claim text.

Toner

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Toner

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Abstract

Claims13