Electrostatic-image developing toner, electrostatic image developer, and toner cartridge
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United States of America Patent
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Nov 26, 2019
Grant Date -
Apr 5, 2018
app pub date -
Aug 2, 2017
filing date -
Oct 5, 2016
priority date (Note) -
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Abstract
An electrostatic-image developing toner contains toner particles containing a polycondensate resin and hydrophobic external additive particles having a volume average particle size of about 40 to about 200 nm. The electrostatic-image developing toner has a difference between a half-fall temperature T1/2A and a half-fall temperature T1/2B of about 2.0° C. to about 10° C. The half-fall temperature T1/2A is measured with a flow tester after storage in an environment at 50° C. and an absolute humidity of 16.5 g/m3 for 2 hours. The half-fall temperature T1/2B is measured with a flow tester after storage in an environment at 50° C. and an absolute humidity of 82.7 g/m3 for 2 hours.
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