Toner for electrophotography and developer for electrophotography using the same, process cartridge, apparatus for forming image, and method for forming image
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United States of America Patent
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Aug 7, 2007
Grant Date -
Oct 9, 2003
app pub date -
Oct 24, 2002
filing date -
Mar 19, 2002
priority date (Note) -
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Abstract
A toner for electrophotography fulfilling both the fixability and the void resistance at high level, and forms a high-quality image. The toner for electrophotography contains: a binder resin; and a wax component which contains: a first wax having an endothermic peak in a temperature region of 60 to 90.degree. C., the endothermic peak occurring in the temperature-rising stage of a DSC curve determined by a differential scanning calorimeter, and having a molecular weight distribution (weight-average molecular weight (Mw)/number-average molecular weight (Mn)) of 1.5 or less, and substantially not containing a component having 500 Mw or less; and at least any of a second wax having an endothermic peak in a temperature region of 100 to 150.degree. C. and the molecular weight distribution of 5 to 20; and a third wax having an endothermic peak in a temperature region of 150 to 170.degree. C. and the molecular weight distribution of 1.1 or more.
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