| 摘要 |
PURPOSE:To stabilize triboelectric characteristics, etc., by forming a coating layer made of a cross-linked copolymer composed essentially of chloro trifluoroethylene, 2,2,3,3-tetrafluoropropyl vinyl ether, etc., on a core material. CONSTITUTION:The coated developer carrier can be manufactured by preparing a cross-linked copolymer composed essentially of (a) chlorotrifluoroethylene, (b) 2,2,3,3-tetrafluoropropyl vinyl ether, and (c) hydroxyalkyl vinyl ether; dissolving this copolymer in a solvent, such as ethyl acetate, acetone, or tetrahydrofuran, to prepare a resin coating material having a solid concn. of 0.1-15wt%, preferably, 0.5-5wt%; coating the core material, such as silica sand, glass beads, or aluminum type grains, by spray coating; and hardening it at 5-200 deg.C for few secs - 7 days, practically, at 50-150 deg.C for several min - several ten min. |
