THERMOPLASTIC ELASTOMER COMPOSITION, ELASTIC BLADE FOR REGULATING AMOUNT OF DEVELOPER USING THE COMPOSITION, AND DEVELOPING APPARATUS USING THE BLADE

摘要

PROBLEM TO BE SOLVED: To provide a developing apparatus which is capable of developing with such a high quality as forming no steak unevenness on a thin layer on a developing sleeve, by uniform friction and electrification of a toner through elastic and uniform pressing and contacting. ;SOLUTION: A thermoplastic elastomer composition comprises a polyamide- based elastomer (A), an oil-extended olefinic copolymer rubber (B) containing 20-150 pts.wt. of a mineral oil-based softener based on 100 pts.wt. of an olefinic copolymer having a Mooney viscosity at 100°C of 120-350, and a modified polyolefin resin (C), (A)/[(B)+(C)] being (90-15)/(10-85) wt.%, and is prepared by a process containing a step of carring out the crosslinking of the oil-extended olefinic copolymer rubber (B) in the presence of an organic peroxide, wherein the component (A) forms a matrix phase, the component (B) forms a dispersed phase, and the dispersed phase has a maximum diameter of 50 μm or less. This thermoplastic elastomer composition is used for an elastic blade.;COPYRIGHT: (C)2001,JPO