| 摘要 |
PURPOSE:To enhance strength, durability, etc. by forming the insulating layer of an image bearing material holding an electrostatic image or a toner image consisting of the upper layer composed essentially of an org. solvent-soluble thermoplastic resin and the lower layer composed essentially of this resin and a photo-setting acrylic-modified epoxy resin. CONSTITUTION:An insulating layer formed on the photoconductive layer of an electrophotographic sensitive body or the insulating layer of a toner image bearing material having no photoconductive layer, etc. consists of the upper layer composed essentially of an org. solvent-soluble thermoplastic resin incorporating a highly fluorinated surfactant, etc., when needed, for uniformly dispersing a lubricant, and the lower layer composed essentially of said resin and a photo-setting acrylic-modified epoxy resin having 400-3,000 weight average mol. wt. and <=5 acid value, and a first/second resin mixing ratio of (10:90)-(70:30). As a result, the lower layer enhances adhesion strength between the photoconductive layer or a substrate and the insulating layer and mechanical strength of the image bearing material, and the upper layer enhances electrostatic charge retentivity, cleanability, etc. to extend its durability. |
