| 摘要 |
PURPOSE:To enhance fixability and offset resistance by mixing 3 kinds of specified resins in each specified proportion without using other resin. CONSTITUTION:An electrostatic image developing toner is prepared by mixing (A) 60-70wt% resin having <=100,000 weight average mol.wt. and 50-100 deg.C glass transition point, (B) 5-15wt% resin having 100,000-200,000 weight average mol.wt. and 35-60 deg.C glass transition point, and (C) 20-30wt% resin having >=200,000 weight average mol.wt. based on the total weight of the resins. The toner thus obtained can be improved in both of offset resistance and fixability at heat roll temp. of 150-190 deg.C. |
