| 摘要 |
PROBLEM TO BE SOLVED: To efficiently produce high-quality toner having sufficient coloring properties by using a kneading method of continuous treatment, where no batch operation of repetition is required. SOLUTION: A manufacturing method of toner includes a first kneading process for fusing and kneading a raw material mixture containing at least a binder resin and colorant; and a second kneading process for diluting and mixing the kneaded object obtained by the first kneading process by at least the same kind of binder resin or a different kind of binder and for fusing and kneading the diluted mixture. Additionally, the kneaded object obtained by the second kneading process is crushed and continuous-type two-roll-type kneading machine is used in the first kneading process. Further, the average residence time (θ) of the kneaded object in the kneading machine meets the following expression and is at least two minutes or more. In this case, the expression is expressed byθ=5π×L×ρ×Δd×(Δd+D)×(1/F)>2. COPYRIGHT: (C)2004,JPO |
