| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide carrier core material for electrophotography whose adhesiveness to coating resin is improved and its producing method, and to produce the carrier core material for electrophotography whose adhesiveness to the coating resin is improved from the used carrier for electrophotography. SOLUTION: By processing the carrier core material or the used carrier for electrophotography by supercritical water or subcritical water on a condition that temperature is >=300 deg.C and pressure is 20 MPa, the wettability of the carrier core material is made >=3.5 g (per 50 g core material), whereby the adhesiveness of the core material to the coating resin is improved.</p> |
