| 摘要 |
A toner, particularly a color toner suitable for full-color image formation through a substantially oil-less heat-pressure fixing device, is formed from at least a binder resin, a colorant and a wax. The toner has viscoelasticity including: a storage modulus at 80° C. (G'80) in a range of 1x106-1x1010 dN/m2, storage moduli at temperatures of 120-180° C. (G'120-180) in a range of 5x103-1x106 dN/m2, and loss tangents (tan delta=G''/G' as a ratio between G'' (loss modulus) and G' (storage molecules)) including a loss tangent at 180° C. (tan delta180) and a minimum of loss tangents over a temperature range of 120-180 ° C. (tan deltamin) satisfying 1<=tan delta180/tan deltamin. The toner further exhibits a thermal behavior providing a heat-absorption curve according to differential scanning calorimetry (DSC) showing a maximum heat-absorption peak temperature in a range of 50-110° C. in a temperature range of 30-200° C.
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