Patent ID: 7208211

Claim:
A single layer electrophotographic belt member having a volume resistance from 10 0 Ω to 10 14 Ω comprising a resin composition, wherein said resin composition contains: (a) from 30% by weight to 90% by weight of a thermoplastic resin; (b) from 2% by weight to 30% by weight of a compound selected from the group consisting of a polyether-ester amide, a polyether ester and a polyether amide; (c) from 0% by weight to 5% by weight of an electrolyte; and (d) from 2% by weight to 50% by weight of an insulating filler, wherein the compound acts as a conducting agent and the electrolyte acts to lower electrical resistance and wherein (i) a wall thickness of said electrophotographic belt member is from 50 μm to 300 μm, (ii) a maximum value of volume resistance in a peripheral direction of the electrophotographic belt member is within 100 times a minimum value thereof, (iii) a maximum value of volume resistance in a generatrix direction of the electrophotographic belt member is within 100 times a minimum value thereof, (iv) a maximum value of surface resistance in a peripheral direction of the electrophotographic belt member is within 100 times a minimum value thereof, (v) a maximum value of surface resistance in a generatrix direction of the electrophotographic belt member is within 100 times a minimum value thereof, and wherein the volume resistance (A) of the belt member and the volume resistance (B) of the belt member from which the insulating filler is removed, satisfies the equation (B)/(A)<10 and the insulating filler is selected from the group consisting of barium sulfate, calcium sulfate, barium titanate, potassium titanate, titanium oxide, magnesium oxide, magnesium hydroxide, aluminum hydroxide, talc, kaolin, hydrotalcite, silica, alumina, ferrite, calcium carbonate, barium carbonate, nickel carbonate, alumina fiber, potassium titanate fiber and fine particles of second thermoplastic resins.