| 摘要 |
PROBLEM TO BE SOLVED: To provide surface modified silica fine powder which has remarkably improved toner fluidity and durability and exhibits excellent toner filming, fogging and cleaning properties. SOLUTION: The surface modified silica fine powder having stability with time is surface treated silica fine powder and has 20 to 42°angle of repose and 20 to 90 m<SP>2</SP>/g BET specific surface area. In the powder, the change rate (A/B) of the triboelectric charge quantity (B) after the lapse of 30 min to the initial triboelectric charge quantity (A) is 1.0 to 2.0. The toner composition contains the silica powder. COPYRIGHT: (C)2004,JPO&NCIPI |
