| 摘要 |
PURPOSE:To provide an electrophotographic magnetic carrier which imparts a long life as a developer and hardly damages a photosensitive body, because it has a composite crosslinking structure consisting of a urethane linkage and a urea linkage and the particle has a curved surface form. CONSTITUTION:In the electrophotographic magnetic carrier in which a ferromagnetic particle is dispersed into a resin, the carrier particle has a curved surface form with 10-300mu average particle size, and the electrophotographic magnetic carrier consists of the ferromagnetic particle being characterized by having the composite crosslinking structure being crosslinked with the urethane linkage and the urea linkage, and a polyurethane polyurea. |
