DEVELOPER QUANTITY CONTROL BLADE HAVING BLADE MEMBER COMPOSED OF A THERMOPLASTIC ELASTOMER COMPOSITION AND IMAGE FORMING APPARATUS

摘要

A developer quantity control blade is provided which can sufficiently impart charge to toner and which allows bleeding of a material from a blade member to be suppressed even in application of a voltage. The developer quantity control blade includes a supporting member and a blade member, wherein the blade member is composed of a thermoplastic elastomer composition including a block copolymer having a polyamide structure and a polyether structure, and an ion conductive agent; in the blade member, a quantity of an extraction component to be extracted with methyl isobutyl ketone as a solvent is 0.5% by mass or more and 2.4% by mass or less; and a quantity of a molecule having a molecular weight of 5000 or less in the extraction component is 70% by mass or more.

主权项

1. A developer quantity control blade, which controls a quantity of a developer to be conveyed from a developer container by a developer bearing member, comprising:
a supporting member; and a blade member, wherein the blade member is composed of a thermoplastic elastomer composition comprising:
a block copolymer having a polyamide structure and a polyether structure, andan ion conductive agent, wherein, in the blade member, a quantity of an extraction component to be extracted with methyl isobutyl ketone as a solvent is from 0.5% by mass to 2.4% by mass, and wherein a quantity of a molecule having a molecular weight of 5000 or less in the extraction component is 70% by mass or more.