Patent ID: 6300024
Filing Date: 2001-10-09
Classification: G03G

Abstract:
A toner comprising: at least a binder resin, a colorant and a wax, whereinthe toner has a maximum heat-absorption peak of 60-135.degree. C. as measured by differential scanning calorimetry (DSC);the toner has a viscoelastic characteristic measured at an angular frequency of the toner of 6.28 rad/sec including: a temperature giving a loss molecules G"" of 3.times.10.sup.4 Pa of 90-115.degree. C., a temperature giving a loss modulus G"" of 2.times.10.sup.4 Pa of 95-120.degree. C., a temperature giving a loss modulus G"" of 1.times.10.sup.4 Pa of 105-135.degree. C., a tan .delta. (loss modulus G""/storage modulus G') when G""=1.times.10.sup.4 -3.times.10.sup.4 Pa of 0.6-2.0, a storage modulus at 170.degree. C. (G' (170.degree. C.)) of 1.times.10.sup.2 -1.times.10.sup.4 Pa, a loss modulus at 170.degree. C. (G"" (170.degree. C.)) of 1.times.10.sup.2 -1.times.10.sup.4 Pa, and a ratio of a tan .delta. at 170.degree. C. (tan .delta..sub.170) to a tan .delta. at 150.degree. C. (tan .delta..sub.150) (tan .delta..sub.170 /tan .delta..sub.150) of 1.05-1.6; andthe toner contains a tetrahydrofuran (THF)-soluble content exhibiting a molecular weight distribution according to gel permeation chromatography (GPC) chromatogram providing a main peak in a molecular weight region of 2,000-30,000 and a ratio (Mw/Mn) of above 100 between weight-average molecular weight (Mw) and number-average molecular weight (Mn).