摘要:
The present invention provides a method of producing an electrophotographic photosensitive member using a dispersion solution that shows high liquid stability in long-period storage and hardly causes aggregation of charge-transporting pigment particles during drying a coating. The method of producing an electrophotographic photosensitive member having a charge-transporting layer comprises a step of forming a coating film by applying a dispersion solution comprising polyolefin polymer particles and charge-transporting pigment particles as dispersoids and comprising a dispersion medium, and then forming the charge-transporting layer by heating the coating film and melting the polyolefin polymer particles, wherein the particles consisting of the polyolefin polymer particles and the charge-transporting pigment particles in the dispersion solution have a number average particle diameter of 50 nm or more and 300 nm or less and a degree of dispersion (standard deviation/number average particle diameter) of 1.0 or less.
摘要:
An object of the present invention is to improve a phenomenon of the life-shortening of the endurance life due to scratch occurring when recesses of a fixed dimple shape are formed on the surface of the surface layer, in order to inhibit the chattering and folding back of a cleaning blade and the fracture of an edge, which occurs because friction between the surface layer of the surface of an electrophotographic photosensitive member and an abutting member is high; and particularly to improve the above described problems, from initial printing through printing on many sheets, which become particularly remarkable when using an electrophotographic photosensitive member with the use of a curable resin that is improved so as to have a high elastic deformation rate for the surface layer, in order to improve the strength of the surface layer, for the purpose of increasing the durability of an electrophotographic photosensitive member. An electrophotographic photosensitive member for achieving the object, which has a support and an organic photosensitive layer, is characterized in that the electrophotographic photosensitive member has dimple-like recesses formed on the surface of the surface layer of the electrophotographic photosensitive member, and further has the recesses with the same pattern as that on the surface of the surface layer, formed on the interface created between the surface layer of the organic photosensitive member and the layer directly under the surface layer (a subsurface layer).
摘要:
The present invention provides organophotoreceptors comprising an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising:
(a) a charge transport material having the formula where R 1 and R 2 are, independently, H, an alkyl group, an alkaryl group, or an aryl group; X is a linking group having the formula -(CH 2 ) m -, branched or linear, where m is an integer between 1 and 20, inclusive, and one or more of the methylene groups is optionally replaced by O, S, C=O, O=S=O, a heterocyclic group, an aromatic group, urethane, urea, an ester group, a NR 3 group, a CHR 4 group, or a CR 5 R 6 group where R 3 , R 4 , R 5 , and R 6 are, independently, H, hydroxyl group, thiol group, an alkyl group, an alkaryl group, a heterocyclic group, or an aryl group; E is an epoxy group; and Z is a phenothiazine group, a phenoxazine group, a phenoxathiin group, a dibenzo(1,4)dioxin group, a thianthrene group, or a phenazine group; and (b) a charge generating compound.
Corresponding electrophotographic apparatuses and imaging methods (processes) are described, as are corresponding charge transport materials.
摘要:
The present invention provides organophotoreceptors comprising an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising:
(a) a charge transport material having the formula where R 1 and R 2 are, independently, H, an alkyl group, an alkaryl group, or an aryl group; X is a linking group having the formula -(CH 2 ) m -, branched or linear, where m is an integer between 1 and 20, inclusive, and one or more of the methylene groups is optionally replaced by O, S, C=O, O=S=O, a heterocyclic group, an aromatic group, urethane, urea, an ester group, a NR 3 group, a CHR 4 group, or a CR 5 R 6 group where R 3 , R 4 , R 5 , and R 6 are, independently, H, hydroxyl group, thiol group, an alkyl group, an alkaryl group, a heterocyclic group, or an aryl group; E is an epoxy group; and Z is a phenothiazine group, a phenoxazine group, a phenoxathiin group, a dibenzo(1,4)dioxin group, a thianthrene group, or a phenazine group; and (b) a charge generating compound.
Corresponding electrophotographic apparatuses and imaging methods (processes) are described, as are corresponding charge transport materials.
摘要翻译:本发明提供organophotoreceptors包括电的在导电基板的导电性基板和感光元件,所述光电导元件,包括:(a)具有下式其中,R1和R2彼此独立,unabhängig,H,烷基的电荷输送材料 基,在烷芳基,或芳基; X是具有下式的连接基团 - (CH 2)间,支链或直链的,其中m是1至20,包括端值,和一个或多个亚甲基基团之间的整数任选地被替换为O,S,C = O ,O = S = O,杂环基,芳族基团,氨基甲酸乙酯,尿素,以酯基,NR 3基,CHR 4基团,或其中R3,R4,R5,和R6是,独立地为CR 5 R 6基团,H, 羟基,硫醇基,在烷基基团,在烷芳基,杂环基,或芳基; E是环氧基; 并且Z是吩噻嗪基,吩恶嗪一基,吩嗪基,二苯并(1,4)二氧杂环己烯基,噻蒽基,或吩嗪基; 和(b)一电荷产生化合物。 ?>通讯电子照相装置和成像方法(过程)中描述,作为对应的电荷传输材料。
摘要:
In an electrophotographic process: a single-layer organic photosensitive material drum (1) having a single organic photosensitive layer of a thickness of not smaller than 25 µ m formed on an electrically conducting blank tube (1a) with a surface roughness Ra of not larger than 0.6 µ m; the drum (1) rotates at a peripheral speed of not lower than 400 mm/sec, in order to execute an image-forming processing that includes electric charging, exposure to image-bearing light, developing, transfer, cleaning by a blade (6b), and removal of electric charge. Though the photosensitive material drum (1), rotates at a high speed and a large frictional force is exerted on the cleaning blade (6b), damage to the blade (6b), is effectively suppressed, and images are stably formed for extended periods of time without permitting the cleaning to become defective.
摘要:
An electrophotographic photoreceptor which is excellent in sensitivity, durability and environmental capability comprises a photosensitive layer containing dihydroxysilicon phthalocyanine which is monoclinic and has lattice constants a = 12.8 ± 1Å, b = 14.5 ± 1Å, c = 6.8 ± 1Å and β = 94.4 ±1°.