DEVELOPER CARRYING MEMBER AND IMAGE FORMING APPARATUS

摘要

Provided is a developer carrying member which depends on a sheet-passing speed to a small extent while maintaining satisfactory developability, and can stably suppress a fogging amount with time. The developer carrying member includes: an electro-conductive mandrel; and an electro-conductive elastic layer, in which: the elastic layer contains a resin j, an electro-semiconductive particle p, and an electro-conductive particle c; and when an electroconductivity of the resin j is defined as σj, a dielectric constant of the resin j is defined as ∈j, an electroconductivity of the electro-semiconductive particle p is defined as σp and a dielectric constant of the electro-semiconductive particle p is defined as ∈p, σj, ∈j, σp, and ∈p satisfy relationships represented by the following formulae (1) and (2), σj, ∈j, σp and ∈p being calculated by an AC impedance method.;σj<σp<0.05 S/cm  (1);∈p<∈j  (2)

主权项

1. A developer carrying member, comprising:
an electro-conductive mandrel; and an electro-conductive elastic layer, wherein: the elastic layer contains
a resin j,an electro-semiconductive particle p, andan electro-conductive particle c; and when an electroconductivity of the resin j is defined as σj, a dielectric constant of the resin j is defined as ∈j, an electroconductivity of the electro-semiconductive particle p is defined as σp, and a dielectric constant of the electro-semiconductive particle p is defined as ∈p,
σj, ∈j, σp, and ∈p satisfy relationships represented by the following formulae (1) and (2), σj, ∈j, σp and ∈p being calculated by an AC impedance method.
σj<σp<0.05 S/cm  (1)∈p<∈j  (2)