Abstract: An electrically conductive thermoplastic resin composition to which an electrically conductive agent is added, characterized in that a base resin for the resin composition contains a polyester resin. A resinous base-body for a photosensitive drum made of the above-mentioned electrically conductive resin composition and used in electrostatic recording processes including electro-photographic processes and the like. A photosensitive drum which is made up of the above-mentioned base-body and a photosensitive layer formed thereon. An electrically conductive resin composition which keeps a higher dimensional stability particularly under conditions of high temperature and high humidity without degrading mechanical strength, workability, etc., a base-body for a photosensitive drum using the resin composition, and a photosensitive drum using the base-body become obtainable.

Abstract: In the image display device, in which the image display media are sealed between opposed substrates, at least one of two substrates being transparent, and in which the image display media, to which an electrostatic field is applied, are made to move so as to display an image, a construction of the particles utilizing as the image display media is improved (the first, second, fourth, fifth, sixth, eighth and ninth aspects of the invention), and, a material of the particles utilizing as the image display media is improved (the third, seventh and tenth aspects of the invention). Therefore, the whiteness of the particles and the liquid powder using the particles can be improved, and it is possible to prevent the particle agglutination and to control the charge property. Moreover, in the image display panel in which the particles and the liquid powder are used as the image display media, it is possible to obtain a durability such that a contrast of the image display during a repetition display is not decreased.

Abstract: There are disclosed a multi-color injection molding process for producing an ink-jet printer member comprising a plastics substrate and an elastic material layer that are integrally composited, which comprises melt-injecting into a mold in turn, a material for a plastics substrate and an elastic material composed of a thermoplastic elastomer; and an insert molding process for producing the ink-jet printer member mentioned above, which comprises placing in advance, a plastics substrate of a prescribed form in a mold, and melt-injecting an elastic material composed of a thermoplastic elastomer into said plastics substrate. The above processes are well suited for the production of the ink-jet printer member such as an ink tank valve for supplying a recording head with an ink to be filled in an ink chamber, also of a sealing member which is installed at an ink supply port or on the main body of an ink-jet printer and prevents an ink from leaking through the ink supply port or through the recording head.

Abstract: A resin made base body in the form of a pipe has (1) a plurality of alternating projections and depressions which are provided on an outer peripheral surface of the pipe and aligned in substantially parallel rows in one of an axial direction and a circumferential direction of the pipe; (2) a specular gloss at 60° of a surface of the pipe in a range of 15 to 25; or (3) a skin layer formed in an outer peripheral portion in the thickness direction of a peripheral wall of the pipe, wherein an amount of the conductive agent present in the skin layer is equal to, or less than, one-tenth an amount of the conductive agent present in a central portion in the thickness direction of the peripheral wall of the pipe.

Abstract: A base-body for photosensitive drum comprising resin composition assembled to an image formation apparatus, wherein the base-body comprises a main frame, a flange portion with a thickness of from 0.1 mm to 5 mm and a gear at one end of the main frame integrally injection molded. According to the present invention, a base-body for photosensitive drum comprising a main frame, a flange portion and a gear both provided at one end of the main frame can be integrally molded by injection molding a resin composition without deformation of the gear in the timing of release from the mold. Therefore, a photosensitive drum provided from the base-body for photosensitive drum of the present invention is superior in rotational accuracy, driving transmission and has capability of forming a favorable image of high quality.

Abstract: The substrate for photosensitive drum of the invention for use in electrophotographic process is produced by ultrasonic-welding a resin-made flange or gear flange to an end portion of a cylindrical substrate made from an electroconductive resin composition prepared by dispersedly mixing an electroconductive material and a filler into a polymer matrix. The ultrasonic welding permits an efficient production of the substrate for photosensitive drum and ensures a high rotation accuracy of the substrate for photosensitive drum. With such a substrate for photosensitive drum, images with high quality can be formed.

Abstract: There is disclosed a fluid supply valve comprising a disc-shaped valve body which is equipped with a fluid supply port in the central portion thereof and composed of an elastic material whose peripheral portion is reinforced and fixed with a rigid material, the fluid supply port being closed when the valve body abuts against a fixed valve seat placed so as to be opposite to the fluid supply port, and being opened when the valve body is separated from the fixed valve seat, wherein the disc shaped valve body is equipped further with a thin walled portion in the intermediate annular portion between the fluid supply port and the peripheral portion in the radial direction, and/or with an inflectional portion in the radial direction between the fluid supply port and the peripheral portion.

Abstract: Disclosed herein are a mixed resin compound, a resin pipe, a process for producing said resin pipe, and a photosensitive drum. The resin compound meets at least one of the following requirements. It is a mixture of two or more kinds of resins blended in a specific manner, it undergoes annealing under specific conditions, and it has specific values of surface roughness, Vickers hardness, coefficient of linear expansion, flexural modulus, and thermal conductivity. The resin pipe is suitable for use as the cylindrical base of the photosensitive drum for electrophotographic machines, such as copying machines, facsimiles, and printers. It is superior in surface smoothness, dimensional stability, coatability, and handlability, and hence it is very little vulnerable to damage during handling and dimensional change due to resin shrinkage and is superior in heat resistance (desirable for solvent removal) and mechanical strength (desirable for flange fitting).

Abstract: The invention relates to a cylindrical resinous base-body for a photosensitive drum, and a photosensitive drum that includes the resinous base-body.

Abstract: There are disclosed a resin composition (I) which comprises 100 parts by weight of (a1) a styrenic thermoplastic elastomer composed of a block copolymer (styrene-ethylene/butylene-styrene block copolymer, styrene-ethylene/propylenestyrene block copolymer), 3 to 50 parts by weight of (b1) an ethylene/(meth) acrylic acid copolymer or an ethylene/(meth)-acrylic ester copolymer each having 5 to 45% by weight of (meth)acrylic acid content, and 50 to 170 parts by weight of (c1) a paraffin base oil; a resin composition (II) which comprises 100 parts by weight of (a2) a styrenic thermoplastic elastomer composed of a block copolymer, 1 to 15 parts by weight of (b2) a maleic anhydride-grafted polyolefin, and 30 to 170 parts by weight of (c2) a paraffin base oil; a gasket material (I) composed of the components (a1), (b1) and (c1); a gasket material (II) composed of the components (a2), (b2) and (c2); and a gasketed cover in which a gasket made of the gasket material (I) or (II) is integrally fitted to a cover body made

Abstract: There is disclosed a fluid supply valve comprising a disc-shaped valve body which is equipped with a fluid supply port in the central portion thereof and composed of an elastic material whose peripheral portion is reinforced and fixed with a rigid material, the fluid supply port being closed when the valve body abuts against a fixed valve seat placed so as to be opposite to the fluid supply port, and being opened when the valve body is separated from the fixed valve seat, wherein the disc shaped valve body is equipped further with a thin walled portion in the intermediate annular portion between the fluid supply port and the peripheral portion in the radial direction, and/or with an inflectional portion in the radial direction between the fluid supply port and the peripheral portion.

Abstract: There is disclosed a fluid supply valve comprising a disc-shaped valve body which is equipped with a fluid supply port in the central portion thereof and composed of an elastic material whose peripheral portion is reinforced and fixed with a rigid material, the fluid supply port being closed when the valve body abuts against a fixed valve seat placed so as to be opposite to the fluid supply port, and being opened when the valve body is separated from the fixed valve seat, wherein the disc shaped valve body is equipped further with a thin walled portion in the intermediate annular portion between the fluid supply port and the peripheral portion in the radial direction, and/or with an inflectional portion in the radial direction between the fluid supply port and the peripheral portion.

Abstract: The invention relates to a cylindrical resinous base-body for a photosensitive drum, and a photosensitive drum that includes the resinous base-body.

Abstract: There are disclosed a first gasketed cover which has excellent sealing properties and comprises a cover body composed of a thermoplastic resin and a gasket composed of a thermoplastic elastomer and integrated with the cover body; a second gasketed cover which has excellent sealing properties and is capable of preventing the generation of noises due the vibration of the cover and which comprises a cover body, a gasket composed of an elastic body and integratedly attached to the cover body, and a member composed of the elastic body of a type same as or different from that in the gasket and integratedly installed on at least part of the cover body plane portion excluding the gasket portion; an electronic equipment cover which is capable of preventing pressure difference between the inside and the outside thereof and which comprises a cover body and a membrane composed of an elastic body and installed on a hole placed on the plane portion of the cover body, in which the cover body is integrated with the membrane;

Abstract: Cylindrical base bodies for photosensitive drums according to first to fifth inventions are each formed by using a conductive resin composition containing a resin base material and a conductive agent dispersed in the resin base material. The base body of the first invention is characterized in that a dimensional accuracy is enhanced by using a mixture of a polyamide and a low water absorption resin as the conductive resin composition. The base body of the second invention is characterized in that a uniform and stable conductivity is obtained by using carbon black having a specific DBP oil absorption amount as the conductive agent. The base bodies of the third and fourth inventions are characterized in that a surface smoothness and a strength are enhanced by using a micro-spherical material or a flaked shape material, or a fibrous inorganic material having a specific fiber length and a specific fiber diameter as an inorganic filler for reinforcement added to the conductive resin composition.

Abstract: There are disclosed a multi-color injection molding process for producing an ink-jet printer member comprising a plastics substrate and an elastic material layer that are integrally composited, which comprises melt-injecting into a mold in turn, a material for a plastics substrate and an elastic material composed of a thermoplastic elastomer; and an insert molding process for producing the ink-jet printer member mentioned above, which comprises placing in advance, a plastics substrate of a prescribed form in a mold, and melt-injecting an elastic material composed of a thermoplastic elastomer into said plastics substrate. The above processes are well suited for the production of the ink-jet printer member such as an ink tank valve for supplying a recording head with an ink to be filled in an ink chamber, also of a sealing member which is installed at an ink supply port or on the main body of an ink-jet printer and prevents an ink from leaking through the ink supply port or through the recording head.

Abstract: There are disclosed a multi-color injection molding process for producing an ink-jet printer member comprising a plastics substrate and an elastic material layer that are integrally composited, which comprises melt-injecting into a mold in turn, a material for a plastics substrate and an elastic material composed of a thermoplastic elastomer; and an insert molding process for producing the ink-jet printer member mentioned above, which comprises placing in advance, a plastics substrate of a prescribed form in a mold, and melt-injecting an elastic material composed of a thermoplastic elastomer into said plastics substrate. The above processes are well suited for the production of the ink-jet printer member such as an ink tank valve for supplying a recording head with an ink to be filled in an ink chamber, also of a sealing member which is installed at an ink supply port or on the main body of an ink-jet printer and prevents an ink from leaking through the ink supply port or through the recording head.

Abstract: There are disclosed a thermoplastic elastomer composition which comprises (a) a hydrogenated block copolymer obtained by hydrogenating the block copolymer comprising at least one polymer block composed principally of a vinylic aromatic compound and at least one polymer block composed principally of a conjugated diene compound; (b) a non-aromatic base softening agent having a kinematic viscosity at 40° C.

Abstract: There is disclosed a fluid supply value comprising a disc-shaped valve body which is equipped with a fluid supply port in the central portion thereof and composed of an elastic material whose peripheral portion is reinforced and fixed with a rigid material, the fluid supply port being closed when the valve body abuts against a fixed valve seat placed so as to be opposite to the fluid supply port, and being opened when the valve body is separated from the fixed valve seat, wherein the disc-shaped valve body is equipped further with a thin-walled portion in the intermediate annular portion between the fluid supply port and the peripheral portion in the radial direction, and/or with an inflectional portion in the radial direction between the fluid supply port and the peripheral portion.

Abstract: A multi-color injection molding process for producing an ink-jet printer member having a plastic substrate and an elastic material layer that are integrally composited, by melt-injecting into a mold in turn, a material for a plastic substrate and an elastic material composed of a thermoplastic elastomer. The above process is well suited for the production of the ink-jet printer member such as an ink tank valve for supplying a recording head with an ink to be filled in an ink chamber, also of a sealing member which is installed at an ink supply port or on the main body of an ink-jet printer and prevents an ink from leaking through the ink supply port or through the recording head.