PURPOSE: To suppress the sticking of a toner, etc., to the surface of the semiconductive elastic layer of an electrifying member and to improve the durability of the member by forming a surface layer of a resin consisting essentially of polyester polyol and polyisocyanate as polymers on the elastic layer.
CONSTITUTION: This electrifying member is a roll-shaped member and consists of an electrically conductive substrate 101 having the shape of a core metal, a semiconductive elastic layer 102 disposed around the substrate 101 and a surface layer 103 formed on the peripheral surface of the elastic layer 102. The endless belt-shaped elastic layer 102 is made of epichlorohydrin rubber and the surface layer 103 is made of a hardened film consisting of polyester polyol and a relatively excess of polyisocyanate. The polyester polyol is a polyrmer obtd. by bringing polycarboxylic acid and polyol into a condensation reaction and having ester bonds and hydroxyl groups in each molecule and forms a coating film having superior nonstickiness and flexibility by urethane crosslinking with polyisocyanate.
JPH0616301A | 1994-01-25 | |||
JPH02310566A | 1990-12-26 | |||
JPH06248174A | 1994-09-06 |