Toner, and developer, container packed with toner, process cartridge, image forming apparatus and method for forming image

Toner, and developer, container packed with toner, process cartridge, image forming apparatus and method for forming image

  • CN 1,938,649 B
  • Filed: 01/24/2005
  • Issued: 10/24/2012
  • Est. Priority Date: 02/03/2004
  • Status: Active Grant
First Claim
Patent Images

1. toner;

  • This toner comprises the toner materials that contains binder resin and colouring agent at least;

    And be the toner that the surface has concavo-convex almost spherical;

    Wherein, The form factor SF-1 that representes the spherical degree of toner that representes with following mathematical expression 1 is 105~

    180;

    And the form factor SF-2 that representes the concavo-convex degree of toner with following mathematical expression 2 is represented is 110~

    300;

    The volume average particle size of said SF-2 and said toner shows dependency relation;

    Simultaneously apart from toner surface 1 μ

    m with the interior layer that contains inorganic oxide particle that comprisesSF-1=(M&

    times;

    LNG)
    2
    AREA
    &

    times;

    &

    pi;

    4
    &

    times;

    100
    Mathematical expression 1 In above-mentioned mathematical expression 1, XLNG representes toner is projected to the maximum length of the shape that two dimensional surface obtains, and AREA representes toner projected to two dimensional surface and the area of graph that obtains;

    SF-2=(PERI)2AREA&

    times;

    14&

    pi;

    &

    times;

    100
    Mathematical expression 2 In above-mentioned mathematical expression 2, PERI representes toner projected to two dimensional surface and the girth of the figure that obtains, and AREA representes toner projected to two dimensional surface and the area of graph that obtains,Wherein volume average particle size Dv is 3 μ

    m~

    10 μ

    m, and the ratio Dv/Dn of volume average particle size Dv and number average particle diameter Dn is 1.00~

    1.35,Wherein, the difference that is lower than the SF-2 more than the toner particle diameter that amount is maximum in the size-grade distribution of SF-2 and toner of the toner particle diameter that amount is maximum in the size-grade distribution of toner is more than 8,Wherein this inorganic oxide particle comprises the oxide of silicon, aluminium, titanium, zirconium, cerium, iron, magnesium,Wherein toner is at loading 10kg/cm <

    >

    2 <

    >

    The time voidage be below 60%.

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