| 摘要 |
PROBLEM TO BE SOLVED: To provide a toner supply roll having low electric resistance in an early stage and excellent energization durability. SOLUTION: The toner supply roll has a shaft and at least one layer formed on the peripheral surface of the shaft and the innermost layer is formed using an electrically conductive material containing a quaternary ammonium salt of formula (1) as an ionic conductor. In the formula (1), R<1> -R<4> are each alkyl, at least one is different from each other, at least one is a 4-12C alkyl; X<n-> is an n-valent anion; and (n) is an integer of 1-6. |
