Toner, and image forming method and apparatus using the toner
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United States of America Patent
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Jun 25, 2013
Grant Date -
Mar 18, 2010
app pub date -
Sep 8, 2009
filing date -
Sep 17, 2008
priority date (Note) -
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Abstract
The toner includes at least a binder resin, and a colorant. The toner has properties such that the percentage W(3000) of components having a molecular weight of 3,000 or less in tetrahydrofuran-soluble components of the toner determined by a GPC-RALLS viscosity analysis is 20% by weight or less; the molecular weight Mp at the peak top of the main peak in the molecular weight distribution curve of the tetrahydrofuran-soluble components is from 4,000 to 10,000; and the ratio Rt(Mp)/Rs(Mp) of an inertia square radius Rt(Mp) at the molecular weight Mp to an inertia square radius Rs(Mp) of linear polystyrene at the molecular weight Mp is greater than 0.98, wherein the inertia square radius Rs(Mp) is determined from a working curve obtained by subjecting plural polystyrenes having different molecular weights to the GPC-RALLS viscosity analysis.
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