TONER, TWO-PART DEVELOPING AGENT, AND IMAGE FORMATION METHOD

Title:

TONER, TWO-PART DEVELOPING AGENT, AND IMAGE FORMATION METHOD

Document Type and Number:

WIPO Patent Application WO/2011/074060

Kind Code:

A1

Abstract:

Disclosed is a toner which has a good balance between transfer efficiency and cleaning performance, excellent stress resistance, and a good balance between low-temperature fixing properties and fixed winding properties. Specifically disclosed is a toner characterized in that the weight average particle diameter (D4) of the toner is 3.0 to 8.0 μm inclusive, the average circularity degree of the toner is 0.960 to 0.985 inclusive as analyzing by classifying particles having equivalent circle diameters of 1.98 to 200.00 μm inclusive into 800 fractions falling within a circularity degree range from 0.200 to 1.000 inclusive, the number (A) of toner particles having circularity degrees of 0.990 to 1.000 inclusive is 25.0% or less, and the ratio of the number of particles (B) having equivalent circle diameters of 0.50 to 1.98 μm inclusive to the number of all of particles having equivalent circle diameters of 0.50 to 200.00 μm is 10.0% or less.

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Inventors:

SHIOTARI YOSHIAKI (JP)
FUKUDOME KOSUKE (JP)
KOMATSU NOZOMU (JP)
NAKAMURA KUNIHIKO (JP)
KAMAE KENTAROU (JP)
FUJIKAWA HIROYUKI (JP)
ISHIGAMI KOH (JP)
ITAKURA TAKAYUKI (JP)
MINAGAWA HIRONORI (JP)

Application Number:

PCT/JP2009/070855

Publication Date:

June 23, 2011

Filing Date:

December 14, 2009

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Assignee:

CANON KK (JP)
SHIOTARI YOSHIAKI (JP)
FUKUDOME KOSUKE (JP)
KOMATSU NOZOMU (JP)
NAKAMURA KUNIHIKO (JP)
KAMAE KENTAROU (JP)
FUJIKAWA HIROYUKI (JP)
ISHIGAMI KOH (JP)
ITAKURA TAKAYUKI (JP)
MINAGAWA HIRONORI (JP)

International Classes:

G03G9/08; G03G5/05; G03G5/147; G03G9/087; G03G9/10

Foreign References:

JP2002196532A	2002-07-12
JP2000003075A	2000-01-07
JP2000003068A	2000-01-07
JPH11295989A	1999-10-29
JP2002072566A	2002-03-12
JP2008089919A	2008-04-17
JP2005316265A	2005-11-10

Attorney, Agent or Firm:

ABE, Takuma et al. (JP)
Takuma Abe (JP)

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