Charging roller including a conductive cover layer being formed of a seamless tube, process cartridge and electrophotographic image forming apparatus including such a charging roller

   
   

In a charging roller having a support member and a conductive cover layer, the conductive cover layer is formed of a seamless tube. The seamless tube contains at least (A) a thermoplastic styrene elastomer, (B) a polystyrene resin and (C) a carbon black, and the proportion of the component (A) to the component (B) is (A)/(B)=60/40 to 20/80 in weight ratio. A process cartridge and an electrophotographic apparatus have such a charging roller.

В поручая ролик имея член поддержки и проводную крышку наслоите, проводной слой крышки формирует безшовной пробки. Безшовная пробка содержит по крайней мере (A) термопластиковый эластомер стиропласта, (B) смолаа полистироля и (C) чернота углерода, и пропорция компонентного (A) к компонентному (B) (A)/(B)=60/40 до 20/80 в коэффициенте веса. Отростчатый патрон и электрофотографический прибор имеют такой поручая ролик.

 
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