Developing roller
AssigneeNitto Kogyo Co., Ltd.
InventorNaka Hirayama
Life of this patent
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Abstract
A developing roller has a core bar, an electrically conductive layer formed on the circumferential surface of the core bar, and a covering layer formed on the circumferential surface of the conductive layer. The covering layer includes a reaction product produced by subjecting a reaction mixture containing a polyol, an isocyanate compound and a both-terminal reactive silicone oil to a reaction condition for them, and has a dynamic friction coefficient against paper of 0.9 or more and less than 1.2.
Claims18
A developing roller comprising a core bar, an electrically conductive layer formed on the circumferential surface of the core bar, and a covering layer formed on the circumferential surface of the conductive layer, said covering layer comprising a reaction product produced by subjecting a reaction mixture containing a polyol, an isocyanate compound and a both-terminal reactive silicone oil to a reaction condition for them, and having a dynamic friction coefficient against paper of 0.9 or more and less than 1.2.
Dependencies are inferred from the claim text.