Patent ID: 6586147
Filing Date: 2003-07-01
Classification: G03G

Abstract:
A toner, comprising: at least a binder resin, a colorant and a wax, whereinthe toner has viscoelasticity including: a storage modulus at 80Â° C. (Gâ€²80) in a range of 1Ã—106-1Ã—108 dN/m2, storage moduli at temperatures of 120-180Â° C. (Gâ€²120-180) in a range of 1Ã—104-5Ã—105 dN/m2 and loss tangents (tan &dgr;=Gâ€³/Gâ€² as a ratio between Gâ€³ (loss modulus) and Gâ€² (storage molecules)) including a loss tangent at 180Â° C. (tan &dgr;min) and a minimum of loss tangents over a temperature range of 120-180Â° C. (tan &dgr;min) satisfying 1&lE;tan &dgr;180/tan &dgr;min, the toner 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 50-110Â° C. in a temperature range of 30-200Â° C., and the binder resin comprises a hybrid resin comprising a polyester unit and a vinyl copolymer unit.