Toner for developing electrostatic image, apparatus unit and...

Details Toner for developing electrostatic image, apparatus unit and... Toner for developing electrostatic image, apparatus unit and...

G - Physics

03

G

G03G 9/08 (2006.01) G03G 9/087 (2006.01) G03G 15/20 (2006.01)

Patent

CA 2176444

A toner for developing an electrostatic image includes: 100 wt. parts of a binder resin, 1 - 150 wt. parts of a colorant and a relatively large amount of 5 - 40 wt. parts of a low-softening point substance. The toner is further characterized by viscoelastic properties including: a storage modulus at 60°C (G'60) and a storage modulus at 80°C (G'80) providing a ratio (G' 60/G' 80) of at least 80, and a storage modulus at 155°C (G'155) and a storage modulus at 190 °C (G'190) providing a ratio (G'155/G'190)of 0.95 - 5. As a result, the toner shows good low-temperature fixability and anti-offset characteristic, and also little temperature-dependence of gloss.

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