Patent ID: 7485401

Claim:
A resin composition for a toner, which contains a crystalline polymer having a melting point of 187 to 280° C. and heat absorption of 25 to 150 mJ/mg at a melting point measured by a differential scanning calorimeter (DSC) and a non-crystalline polyester having a glass transition temperature of 30 to 80° C., which, when 450% of a shear strain is applied at 190° C., it has −27 or higher slope K of the relaxation modulus curve observed after 0.02 seconds to 0.1 seconds from the moment of the shear strain application defined by the following formula (2): K ={Log( G (0.1))−Log( G (0.02))}/(0.1−0.02) (2) wherein, G(0.02) represents the relaxation modulus after 0.02 seconds from the shear strain application; and G(0.1) represents the relaxation modulus after 0.1 seconds from the shear strain application.