摘要:
An electrophotographic photoreceptor comprising a photoconductive layer comprising a photoconductor, a support for the photoconductive layer and a surface layer formed on the photoconductive layer and comprising a curable resin film and an inorganic insulator pieces having a size larger than the film thickness of the curable resin film. In order to prevent the image blurring of an a-Si:H photoreceptor, on the outermost surface of the photoreceptor was formed a surface layer having a structure in which inorganic insulator pieces have protruded from the curable resin film. Since the curable resin is of high resistance and shows no quality change by corona irradiation, and besides the protruding inorganic insulator pieces prevent the abrasion of the resin, the surface layer having a long life and excellent humidity resistance, durability for corona irradiation and abrasion resistance can be realized. Further, by covering the surface layer with a fluorine-containing lubricant, the surface layer having a low friction coefficient and excellent cleaning characteristics is obtained, and besides the resin constituting the surface layer absorbs little moisture. As a result, it becomes possible to use the a-Si:H photoreceptors without a heater. Also, the surface layer of the present invention can be removed and then re-formed.
摘要:
An electrophotographic member comprising a support, a photoconductive layer formed thereon, and a surface layer formed thereon, said surface layer including or attaching a lubricating agent having a perfluoropolyoxyalkyl or perfluoropolyoxyalkylene group to form an organic surface protective lubricating layer, and a fixing group to be fixed to the surface layer, is excellent in moisture resistance, wear resistance and cleaning properties and thus useful in an electrophotographic apparatus with a long life and high reliability.
摘要:
An electrophotographic photosensitive element, e.g. for a photocopier or laser printer, comprises a substrate and a plurality of layers on the substrate including a photoconductive layer of a-Si:H and a protective and lubricating layer which is outermost from said substrate. To provide wear resistance and long life-time of the protective and lubricating layer, this layer comprises a microporous solid material having a pore structure which extends substantially over the whole thickness of the material and a hydrophobic lubricant carried by said solid material. The lubricant includes a liquid film and often times a non-particulate solid film, and provides at least part of the outer surface of the element and is present also in the pores of said microporous solid material.
摘要:
A resin composition comprising an epoxy resin and an isocyanate group-containing fluorine compound is particularly suitable for covering a magnetic recording medium comprising a non-magnetic substrate and formed thereon a thin magnetic film so as to give excellent sliding durability.
摘要:
Disclosed are an apparatus having sliding parts and a compound for preventing diffusion or separation of a base oil; and a compound for preventing diffusion or separation of the base oil used for the apparatus: an electronic or electric appliance using a joul heat generating source, means for taking out joul heat to the outside by sliding with said heat generating source, and heat conducting compound intervenient between said heat taking out means and heat generating source; and the heat conducting compound used for the appliance.
摘要:
A magnetic recording medium is produced by coating a body having (a) a non-magnetic substrate, (b) at least one magnetic substance layer formed on the non-magnetic substrate and (c) at least one protective layer formed on the magnetic substance layer which contains at least one member selected from the group consisting of inorganic oxides, graphite and amorphous allotropes of carbon, with a solid surface modifier containing (i) an ammonium carboxylate type fluorine-containing compound having the formula, (R.sub.f --COO.sup.- H.sup.+).sub.n --R, wherein R.sub.f is a perfluoropolyoxyalkyl chain having a number average molecular weight of at least 800, n is a number of 1-2, and R is a residue selected from the group consisting of an aromatic ammonium which may have one or more substituents at the nucleus, benzylammonium which may have one or more substituents at the nucleus, dibenzylammonium which may have one or more substituents at the nucleus, tribenzylammonium which may have one or more substituents at the nucleus and an aromatic inium which may have one or more substituents at the nucleus, and (ii) an alcohol or fluorine-containing solvent and optionally water, on the surface of the protective layer (c), to form a coat, and then removing the solvent, or alcohol and water from the coat.
摘要:
A magnetic recording medium is produced by coating a body having (a) a non-magnetic substrate, (b) at least one magnetic substance layer formed on the non-magnetic substrate and (c) at least one protective layer formed on the magnetic substance layer which contains at least one member selected from the group consisting of inorganic oxides, graphite and amorphous allotropes of carbon, with a solid surface modifier containing (i) an ammonium carboxylate type fluorine-containing compound having the formula,(R.sub.f --COO.sup.- H.sup.+).sub.n --R,wherein R.sub.f is a perfluoropolyoxyalkyl chain having a number average molecular weight of at least 800, n is a number of 1-2, and R is a residue selected from the group consisting of an aromatic ammonium which may have one or more substituents at the nucleus, benzylammonium which may have one or more substituents at the nucleus, dibenzylammonium which may have one or more substituents at the nucleus, tribenzylammonium which may have one or more substituents at the nucleus and an aromatic inium which may have one or more substituents at the nucleus, and (ii) an alcohol or fluorine-containing solvent and optionally water, on the surface of the protective layer (c), to form a coat, and then removing the solvent, or alcohol and water from the coat.
摘要:
A solid surface modifying composition comprising a film forming material and a fluoroalkyl ether ((Rf).sub.m (CONH--X--NHCO--Y).sub.m (m=1 or 2; Rf: perfluoropolyether chain; X: ##STR1## etc.; ##STR2## etc.) provides surfaces with such improvements as durable water and oil repellency, lubricity and lowered surface energy. The lubricating protective coating is applicable for coatings of recording mediums, photoreceptors and wirings.
摘要:
A magnetic recording medium which comprises a non-magnetic substrate, a thin film magnetic layer formed on the surface of the substrate and an organic thin film protective layer formed on the magnetic layer, the organic thin film protective layer having a thickness of not more than 100 nm and containing a filler having a particle size of not more than 50 nm, wherein the surface of the organic thin film protective layer is further coated with a fluorine-based compound represented by the following general formula:F(C.sub.3 F.sub.6 --I--).sub.x --C.sub.2 F.sub.4 --,F(C.sub.3 F.sub.6 --O--).sub.x --(CF.sub.2 O).sub.y --(CF.sub.2).sub.z --or--(C.sub.2 F.sub.4 --O--).sub.y --(CF.sub.2 --CF.sub.2 --, wherein x, y and z are integers of 1 or more, and a magnetic head whose surface is coated with a lubricant thin film having the same composition as that of the above organic thin film protective layer have an excellent sliding durability, and a magnetic recording apparatus using these magnetic recording medium and magnetic head has a high reliability.
摘要:
Disclosed is an electrophotographic photoreceptor in which an organic lubricant is provided on the surface of an organic photoconductive layer or on a protective layer formed on the organic photoconductive layer. Elements of the organic lubricant are partly exposed from the surface of the organic photoconductive layer or the protective layer while the remainder portions of the elements are embedded or fixed by chemical reaction in the surface region of the photoconductive layer or the protective layer so that the exposed portions of the elements of the organic lubricant provides a lubricating surface layer. The lubricating surface layer supresses wear of the photoreceptor thereby enabling the photosensitive layer to withstand a long repeated use without impairing electrophotographic characteristics.