ENDLESS BELT FOR IMAGE FORMING DEVICES AND IMAGE FORMING DEVICE

摘要

There are provided an endless belt for image-forming apparatuses comprising a molded product produced from a blended mixture containing a thermoplastic elastomer, a thermoplastic resin and a conductive substance, the said endless belt having properties satisfying the following formulae (1), (2) and (3): SR ( 100 €‰ V ) / SR ( 500 €‰ V ) < VR ( 100 €‰ V ) / VR ( 250 €‰ ) SR ( 100 €‰ V ) / SR ( 500 €‰ V ) ‰¤ 30 8 ‰¤ VR ( 100 €‰ V ) / VR ( 250 €‰ V ) ‰¤ 100
wherein SR(100V) represents a surface resistivity as measured by applying a voltage of 100V to the endless belt for 10 sec, SR(500V) represents a surface resistivity as measured by applying a voltage of 500V to the endless belt for 10 sec, VR(100V) represents a volume resistivity as measured by applying a voltage of 100V to the endless belt for 10 sec, and VR(250V) represents a volume resistivity as measured by applying a voltage of 250V to the endless belt for 10 sec. The endless belt for image-forming apparatuses is excellent in flexibility, chemical resistance, dimensional stability, electric resistivity and external environmental stability of these properties, is inexpensive, and is capable of achieving a high image quality and a high durability.