CONDUCTIVE MEMBER, CHARGER, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS

• Main Authors: KAMIJO YUKIKO, NUKADA HIDEMI, HOSHIZAKI TAKETOSHI
• Format: Patent
• Language: English; Japanese
• Published: 19.01.2017
• Subjects: BEARINGS; BLASTING; CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOLOGRAPHY; LIGHTING; MAGNETOGRAPHY; MECHANICAL ENGINEERING; PHOTOGRAPHY; PHYSICS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a conductive member that suppresses the occurrence of unevenness in density of an image.SOLUTION: In a conductive member 121A, for example, comprising a shaft 30 (example of base material), an elastic layer 31 disposed on an outer peripheral surface of the shaft 30, and a surface layer 32 disposed on an outer peripheral surface of the elastic layer 31, the surface layer 32 has a sea-island structure consisting of a sea part 33A including at least a first resin and a conductive agent 34 and island parts 33B including at least a second resin; the average diameter of the island parts 33B is 100 nm or more and 10 or more times smaller than the thickness of the surface layer 32; the conductive agent 34 included in the sea part 33A is distributed in a large amount in the vicinity of interfaces of the sea part 33A and island parts 33B.SELECTED DRAWING: Figure 3 【課題】画像の濃度ムラの発生を抑制する導電性部材を提供する。【解決手段】例えば、シャフト３０（基材の一例）と、シャフト３０の外周面に配設された弾性層３１と、弾性層３１の外周面に配設された表面層３２と、を備える導電性部材１２１Ａにおいて、表面層３２が、少なくとも第１樹脂及び導電剤３４を含む海部３３Ａと少なくとも第２樹脂を含む島部３３Ｂとからなる海島構造を有し、島部３３Ｂの平均径が１００ｎｍ以上且つ表面層３２の層厚の１０分の１以下であり、海部３３Ａに含まれる導電剤３４が、海部３３Ａと島部３３Ｂとの界面付近に偏在している。【選択図】図３