ELECTROSTATIC CHARGE IMAGE DEVELOPING TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, AND TONER CARTRIDGE
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United States of America Patent
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Mar 30, 2017
app pub date -
Jan 27, 2016
filing date -
Sep 24, 2015
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Abstract
An electrostatic charge image developing toner includes toner particles including a polyester resin that is a polycondensate of a polycarboxylic acid and a polyol not containing a derivative of bisphenol A, wherein, when a maximum value is present on a lowest molecular weight side in a molecular weight distribution curve obtained by subjecting a component soluble in tetrahydrofuran of the toner particles to a gel permeation chromatography measurement, a weight average molecular weight (Mw (A)) and a number average molecular weight thereof (Mn (A)), each with respect to a low molecular weight region (A) including the maximum value on the lowest molecular weight side, satisfy that a ratio Mw (A)/Mn (A) is 6.0 or less, and a small diameter side number average particle diameter distribution index of the toner particles is from 1.3 to 1.7.
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