CONDUCTIVE ROLLER
First Claim
1. A conductive roller comprising a toner-transporting portion, made of a vulcanized rubber composition, which is disposed at least on an outermost layer thereof,wherein said vulcanized rubber composition contains a rubber component (A) mixed with a weakly conductive carbon black (B) having a large particle diameter not less than 80 nm nor more than 500 nm, a highly conductive carbon black (C) having a small particle diameter not less than 18 nm nor more than 80 nm, and an inorganic filler (D) consisting of not less than one kind of a metal oxide selected from among a group of titanium oxide, alumina, and silica, anda total of a mixing amount of said weakly conductive carbon black (B), that of said highly conductive carbon black (C), and that of said inorganic filler (D) for 100 parts by mass of said rubber component (A) is not less than 15 parts by mass nor more than 60 parts by mass.
1 Assignment
0 Petitions
Accused Products
Abstract
A conductive roller comprising a toner-transporting portion, made of a vulcanized rubber composition, which is disposed at least on an outermost layer thereof. The vulcanized rubber composition contains a rubber component (A) mixed with a weakly conductive carbon black (B) having a large particle diameter not less than 80 nm nor more than 500 nm, a highly conductive carbon black (C) having a small particle diameter not less than 18 nm nor more than 80 nm, and an inorganic filler (D) consisting of not less than one kind of a metal oxide selected from among a group of titanium oxide, alumina, and silica. The total of a mixing amount of the weakly conductive carbon black (B), that of the highly conductive carbon black (C), and that of the inorganic filler (D) for 100 parts by mass of the rubber component (A) is not less than 15 parts by mass nor more than 60 parts by mass.
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Citations
9 Claims
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1. A conductive roller comprising a toner-transporting portion, made of a vulcanized rubber composition, which is disposed at least on an outermost layer thereof,
wherein said vulcanized rubber composition contains a rubber component (A) mixed with a weakly conductive carbon black (B) having a large particle diameter not less than 80 nm nor more than 500 nm, a highly conductive carbon black (C) having a small particle diameter not less than 18 nm nor more than 80 nm, and an inorganic filler (D) consisting of not less than one kind of a metal oxide selected from among a group of titanium oxide, alumina, and silica, and a total of a mixing amount of said weakly conductive carbon black (B), that of said highly conductive carbon black (C), and that of said inorganic filler (D) for 100 parts by mass of said rubber component (A) is not less than 15 parts by mass nor more than 60 parts by mass.
Specification