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Toner for developing electrostatic image, image forming method, developing device and process cartridge

  • US 5,712,070 A
  • Filed: 02/07/1996
  • Issued: 01/27/1998
  • Est. Priority Date: 02/10/1995
  • Status: Expired due to Term
First Claim
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1. A toner for developing electrostatic images, comprising:

  • toner particles comprising a binder resin, a colorant and a wax;

    wherein the toner has;

    (i) a particle size distribution including a weight-average particle size D4 of X μ

    m and Y% by number of toner particles having a particle size of at most 3.17 μ

    m satisfying the following conditions (1) and (2);

    
    
    space="preserve" listing-type="equation">-5X+35≦

    Y≦

    -25X+180 (1)
    
    
    space="preserve" listing-type="equation">>

    4.0≦

    X≦

    6.3 (2),(ii) at least one heat absorption peak in a temperature region of at most 110°

    C. as measured by differential thermal analysis, and(iii) a tap void of 0.45-0.70.

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