| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a low-cost flash-fixable toner having high IR absorbing ability and satisfactory flash fixability by adding an IR absorber after dissolution in a bonding resin forming the matrix of toner particles. SOLUTION: The flash-fixable toner consists essentially of a bonding resin, a colorant and an IR absorber having the max. absorption at 750-1,100 nm wavelength. The TR absorber has been dissolved in the bonding resin and the amt. of the IR absorber is 0.01-1 wt.% of the total amt. of the toner compsn. Turbidity measured at the time when the IR absorber is added by 0.1 pt.wt. to 100 pts.wt. of the bonding resin is <=10. Since heat is locally generated at the part of the IR absorber in flash fixation and the IR absorber is in a dissolved state, that is, in a finely dispersed state on a molecular level, satisfactory fixability is ensured even if the amt. of the IR absorber added is reduced.</p> |
