摘要:
An electrophotographic photosensitive member has a charge generation layer and a charge transport layer on a conductive substrate, wherein the monomer unit constituting a polymer binder contained in said charge generation layer is the same as that constituting a polymer binder contained in said charge transport layer, and the weight-averaged molecular weight of the polymer binder contained in said charge generation layer is in a range from two to six times of that of the polymer binder contained in said charge transport layer.
摘要:
An electrophotographic photosensitive member has a support and a photosensitive layer provided on the support. The photosensitive layer containing a polysilane compound which has a structural unit represented by the following Formula (1) and has as a terminal group of the polymer chain a group selected from the group consisting of hydroxy, alkoxy and aryloxy ##STR1## wherein R.sub.1 represents a hydrogen atom, an alkyl group or an aralkyl group; R.sub.2 represents an ethyl group, a cycloalkyl group, a vinyl group, or an alkyl group or unsaturated hydrocarbon group having 3 or more carbon atoms, whose carbon atom directly bonded to the phenyl group is a primary carbon atom or a secondary carbon atom.
摘要:
An image forming process is carried out through the steps of electrostatically charging a cylindrical electrophotographic photosensitive member, forming an electrostatic latent image by image exposure, developing the latent image and transferring the developed image to a transfer member. The photosensitive member is comprised of a conductive support and a photosensitive layer which contains oxytitanium phthalocyanine as a charge-generating material and a charge-transporting material. The charge-generating material and the charge-transporting material have a work function (W.sub.F.sup.CG) and a work function (W.sub.F.sup.CT), respectively. Those work functions satisfies the following relationship:-0.2
摘要:
An electrophotographic photosensitive member is formed by a cylindrical substrate and a photosensitive layer disposed on the cylindrical substrate. The cylindrical substrate has a circumferential end section adjacent to at least one longitudinal end of the cylindrical substrate, and the circumferential end section has the photosensitive layer thereon removed and has been subjected to cutting. The electrophotographic photosensitive member is characterized by the circumferential end section having a smooth surface on the cylindrical substrate. The photosensitive member co-operates with a peripheral member, such as a spacer or a sealing member, at the end section in performing a stable electrophotographic process.
摘要:
An electrophotographic sensitive medium and apparatus for use with this medium. The electrophotographic sensitive medium has an electroconductive support, a sensitive layer, and an intermediate layer interposed between the support and the sensitive layer. The intermediate layer material contains a polyamide grafted with a polymer or a copolymer, and the polymer of copolymer contains a unit component represented by the following general formula: ##STR1## wherein R.sub.1 is a hydrogen atom or a methyl group, Z is --O-- or --NH--, and A is an alkylene group having 1 to 6 carbon atoms.
摘要:
An electrophotographic photosensitive member has a substrate, a photosensitive layer and an intermediate layer spaced between said substrate and said photosensitive layer. The intermediate layer contains a polyamide resin grafted with a polymer or a copolymer having a unit component expressed by the following general formula (I) ##STR1## wherein, R.sub.1 is hydrogen atom or a methyl group, each of R.sub.2 and R.sub.3 is a hydrogen atom, an alkyl group or an aryl group or R.sub.2 and R.sub.3 in combination is a residual group necessary for forming a heterocyclic compound containing N, R.sub.2 and R.sub.3 are the same or different from each other. Also disclosed are an electrophotographic apparatus having the photosensitive member, and a facsimile incorporating the electrophotographic apparatus.
摘要:
An electrophotographic photosensitive member comprises a conductive support, and having thereon a charge generation layer formed by coating a coating solution containing a charge generating material dispersed in the time of a total dispersing time T in the range of the formula 4 T.sub.1 .gtoreq.T.gtoreq.2 T.sub.1, followed by drying, and a charge transport layer formed by coating a coating solution containing a charge-transporting material followed by drying and a method of preparing it.
摘要:
An electrophotographic photosensitive member capable of forming images with less defects, such as ghost, while retaining a high photo-sensitivity, is provided. The photosensitive member includes a support and a photosensitive layer disposed on the support, wherein said photosensitive layer contains a phthalocyanine pigment and an azo calix[n]arene compound represented by the formula (1) below: wherein n denotes an integer of 4-8; a number (n) of R1 independently denote a hydrogen atom or an alkyl group capable of having a substituent and including at least one alkyl group capable of having a substituent; a number (2n) of R2 independently denote a hydrogen atom or an alkyl group capable of having a substituent; and a number (n) of Ar independently denote a monovalent group selected from an aromatic hydrocarbon ring group capable of having a substituent, a heterocyclic ring group capable of having a substituent, and a combination of these groups capable of having a substituent.
摘要:
An electrophotographic photosensitive member comprises a conductive support and a photosensitive layer which comprises a charge generation layer and a charge transport layer, characterized in that the charge generation layer contains a polycarbonate resin, and the electrophotographic photosensitive member is electrostatically charged by applying a direct current voltage to a charging member in contact with the surface of said electrophotographic photosensitive member.
摘要:
A surface layer of a photosensitive layer contains at least one resin selected from the group consisting of (a) a polyarylate resin having a structural unit represented by the following general formula (1) and (b) a polycarbonate resin having a structural unit represented by the following general formula (2): ##STR1## wherein, X.sub.1 and X.sub.2 are each single bond, --O--, --S-- or substituted or unsubstituted alkylene and are the same or different, R.sub.1 to R.sub.8 and R.sub.11 to R.sub.14 are each hydrogen, halogen, or substituted or unsubstituted alkyl or aryl and are the same or different, and R.sub.9 and R.sub.10 are each hydrogen, halogen, or substituted or unsubstituted silyl, alkyl or aryl and are the same or different, and n is an integer of 2 or more; ##STR2## wherein X.sub.3 and X.sub.4 are each single bond, --O--, --S-- or substituted or unsubstituted alkylene and are the same or different, R.sub.15 to R.sub.22 are each hydrogen, halogen, substituted or unsubstituted alkyl or aryl and are the same or different, R.sub.23 and R.sub.24 are each hydrogen, halogen, substituted or unsubstituted silyl, alkyl or aryl and are the same or different, and m is an integer of 2 or more.