Toner for electrostatic-image development and toner cartridge containing the same therein
View Patent ↗The object of the invention is to provide a toner for electrostatic-image development which imparts excellent image quality and a toner cartridge employing the toner. The invention relates to a toner for electrostatic-image development, which satisfies the following requirements (1) and (2): (1) the toner has an average transporting property of 2.9 to 15.1 mg/sec; and (2) the product of the BET specific surface area (m 2 /g) and volume-average particle diameter (μm) of the toner is 7.7×10 −6 to 11.0×10 −6 (m 3 /g).
1. A toner cartridge comprising:
a toner for electrostatic-image development, satisfying the following requirements (1) and (2);
a developing roller for supporting the toner for electrostatic-image development thereon;
a charging blade disposed on the upper side of the developing roller; and
a retaining blade disposed on the lower side of the developing roller so as to face the developing roller at a predetermined distance:
(1) the toner has an average transporting property of 2.9 to 15.1 mg/sec; and
(2) the product of the BET specific surface area (m 2 /g) and volume-average particle diameter (μm) of the toner is 7.7×10 −6 to 11.0×10 −6 (m 3 /g), wherein
the toner for electrostatic-image development has a loosened apparent density of 0.342 to 0.425 g/cm 3 .
2. The toner cartridge according to claim 1 , wherein the toner for electrostatic-image development has a loosened apparent density of 0.380 to 0.425 g/cm 3 .