Toner, toner storing unit, and image forming apparatus
OwnerRyuuta YOSHIDA, Akio TAKEI +2inventors
InventorsRyuuta YOSHIDA, Akio TAKEI, Ryohei YAMAGUCHI, Toma TAKEBAYASHI
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Abstract
A toner includes: toner base particles each containing a binder resin; and resin particles on a surface of each of the toner base particles. A glass transition temperature (Tg) of the toner at the first heating in differential scanning calorimetry (DSC) is 20° C. or higher and 50° C. or lower. A glass transition temperature of a tetrahydrofuran (THF)-insoluble component of the toner at the first heating in DSC is −40° C. or higher and 10° C. or lower. An average circularity of the toner is 0.970 or more and 0.985 or less. A standard deviation of the average circularity is 0.020 or less.
Claims10
A toner, comprising:
- toner base particles each containing a binder resin;
- and
- resin particles on a surface of each of the toner base particles, wherein:
- a glass transition temperature (Tg) of the toner at first heating in differential scanning calorimetry (DSC) is 20° C. or higher and 50° C. or lower;
- a glass transition temperature (Tg) of a tetrahydrofuran (THF)-insoluble component of the toner at first heating in DSC is −40° C. or higher and 10° C. or lower;
- an average circularity of the toner is 0.970 or more and 0.985 or less;
- and
- a standard deviation of the average circularity is 0.020 or less.
Dependencies are inferred from the claim text.