| 摘要 |
PURPOSE:To obtain excellent mold releasing property, wear resistance, and environmental resistance of a developer carrier by blending two different kinds of amorphous polymers and molding the blended polymers so that at least the surface of the developer carrier has a continuous phase and a discontinuous phase. CONSTITUTION:Two or more different kinds of amorphous polymers are blended and molded to form a sea-island structure comprising a continuous phase 2 and a discontinuous phase 1. The amorphous polymers are amorphous at least during molding due to heat or pressure, namely, they can flow and can form a continuous phase or a discontinuous phase after molded depending on differences in affinity and solubility with other polymers. The discontinuous phase 1 exists as islands independent from one another in the continuous phase 2 as a sea. Characteristics of the developer carrier can be controlled by varying the diameter and the total area of the discontinuous phase 1 in the surface. The diameter of the continuous phase 2 is preferably 1-500mum. |
