Abstract: To provide an electrically conductive polymer member, which can be stably used with a reduced variation in electrical resistance even when its use environment is changed or continuous energization is conducted, and furthermore, a transfer roller and an image forming device, which can stably produce good images by using the electrically conductive polymer member. An electrically conductive polymer member is formed from an electrically conductive polymer material prepared by adding a quaternary ammonium salt and a lithium imide to a base polymer. When the amounts of compounding of the quaternary ammonium salt and the lithium imide are assumed to be x parts by weight and y parts by weight, respectively, it is preferable that x and y satisfy the following formula: 0.009?(y/x)?0.019. A transfer roller and an image forming device are provided with their respective electrically conductive polymer members.

Abstract: [Object] To provide an electrically conductive polymer member, which can be stably used with a reduced variation in electrical resistance even when its use environment is changed or continuous energization is conducted, and furthermore, a transfer roller and an image forming device, which can stably produce good images by using the electrically conductive polymer member. [Solving Means] An electrically conductive polymer member is formed from an electrically conductive polymer material prepared by adding a quaternary ammonium salt and a lithium imide to a base polymer. When the amounts of compounding of the quaternary ammonium salt and the lithium imide are assumed to be x parts by weight and y parts by weight, respectively, it is preferable that x and y satisfy the following formula: 0.009?(y/x)?0.019. A transfer roller and an image forming device are provided with their respective electrically conductive polymer members.

Abstract: The present invention provides a method for manufacturing a polymer foam suitable for various members for image-forming devices such as copying machines, facsimile machines, and printers and also provides a member, including a polymer foam manufactured by the method, for image-forming devices and a device, including the member, for forming an image. In a step of forming the polymer foam by allowing a polymer feedstock to foam and curing the feedstock, gas of which the solubility decreases with an increase in temperature is dissolved in the polymer feedstock, which is then heated, whereby the feedstock is allowed to foam and cured. Therefore, the polymer foam has a microcellular surface structure. Furthermore, a high-quality member, having superior surface properties, for image-forming devices can be achieved, and a device for forming an image can be achieved.