44results about How to "Enhanced slidability" patented technology

A method for forming an electrophotographic image and a device for forming an image on a transfer material by the steps for charging, exposing, developing and transferring, and recovering the toner remained untransferred in the step for cleaning by recovering, wherein the toner used in the step for developing has a total surface area ratio Z of additive, which is calculated by Z=(Ht·Wt) / (H·W), satisfies 0.5≦Z≦1.5, the electrophotographic photoconductor used comprises at least a photosensitive layer and a filler-containing protective layer provided on a conductive support in that order, and the angle of repose of the toner to the protective layer surface of the electrophotographic photoconductor is 30° or less.

A weatherstrip in which the sliding part of a lip in sliding contact with window glass is covered by a sliding member, wherein the sliding member is composed of a weatherstrip composition containing a polymer A group and a polymer B group, 40 to 100 wt % of the total weight of this composition is accounted for by the polymer A group, and 0 to 40 wt % by the polymer B group, the polymer A group is made up of a domain 1 consisting of crosslinked product of ethylene polymer and the like, and a domain 2 consisting of crosslinked product of ethylene polymer or ethylene / α-olefin copolymer, the storage elastic modulus E′ of domain 1 is at least 3 GPa and less than 9 GPa, and the loss tangent tanδ is from 0.1 to 0.4, the storage elastic modulus E′ of domain 2 is at least 9 GPa and no more than 13 GPa, and the loss tangent tanδ is from 0.1 to 0.3, and the ratio of domain 1 and domain 2 in the polymer A group (domain 1:domain 2) is from 50:50 to 95:5 (wt %), and the polymer B group is made up of a propylene polymer or other thermoplastic resin, in which the storage elastic modulus E′ is from 5 to 17 GPa, and the loss tangent tanδ is greater than 0.4 and no more than 0.7.

A piston connected to a piston rod is fitted in a cylinder having a hydraulic oil sealed therein. Flows of hydraulic oil induced by sliding movement of the piston are controlled by extension and compression damping force generating mechanisms and to generate damping force. In the extension damping force generating mechanism, the valve-opening pressure of a disk valve is controlled by the pressure in a back pressure chamber. An elastic seal member fixed to the disk valve is brought into sliding contact with an inner peripheral surface of a cylindrical portion of a valve member to seal the back pressure chamber. The disk valve is self-aligned by fitting between the elastic seal member and the inner peripheral surface of the valve member and secured by being axially clamped at an inner peripheral portion thereof in a state where a clearance is formed between the inner peripheral portion of the disk valve and a shaft portion of the piston rod, thereby reducing the requirements for coaxiality.

A thermoplastic elastomer composition of the invention, formed by dynamically crosslinking a polymer composition including a rubber and an olefinic resin and having an average particle size of rubber particles within a specific range, shows an excellent balance of mechanical properties such as flexibility and elastic recovery, and a moldability. Also an inclusion of a (meth)acrylate resin and a hydrogenated diene polymer provides a composition particularly excellent in scratch resistance. Also an inclusion of a maleimide compound provides a composition particularly excellent in injection fusibility. Also an inclusion of an undenatured organopolysiloxane of a specific viscosity and a denatured organopolysiloxane provides a composition particularly excellent in initial slidability and durable slidability.

A piston connected to a piston rod is fitted in a cylinder having a hydraulic oil sealed therein. Flows of hydraulic oil induced by sliding movement of the piston are controlled by extension and compression damping force generating mechanisms and to generate damping force. In the extension damping force generating mechanism, the valve-opening pressure of a disk valve is controlled by the pressure in a back pressure chamber. An elastic seal member fixed to the disk valve is brought into sliding contact with an inner peripheral surface of a cylindrical portion of a valve member to seal the back pressure chamber. The disk valve is self-aligned by fitting between the elastic seal member and the inner peripheral surface of the valve member and secured by being axially clamped at an inner peripheral portion thereof in a state where a clearance is formed between the inner peripheral portion of the disk valve and a shaft portion of the piston rod, thereby reducing the requirements for coaxiality.

The invention relates to alumina ceramic powder, alumina ceramic and a preparation method of the alumina ceramic. The alumina ceramic powder comprises components in percentage by mass as follows: 85%-95% of alumina powder, 2%-6% of titanium dioxide powder, 2.5%-8% of magnesia powder and 0.5%-1.5% of nano-ceramic powder which is chromium oxide powder or silicon nitride powder. The alumina ceramic with better bending strength can be prepared from the alumina ceramic powder.

Provided are: a tin-plated / silver-plated laminate, which has excellent abrasion resistance, electrical conductivity and slidability and a low frictional property, and whereby it becomes possible to prevent the embrittlement of a plating layer contained therein; and a method for producing the tin-plated / silver-plated laminate. The present invention is a method for producing a plated laminate by forming a silver plating layer on a tin plating layer that is formed on the surface of a metallic base material, said method being characterized by comprising: a first step of subjecting an arbitrary region in the surface of a tin plating layer to a nickel plating treatment, thereby forming a nickel plating layer; a second step of subjecting an arbitrary region in the surface of the nickel plating layer to a silver strike plating treatment; and a third step of subjecting at least a part of the surface region of the nickel plating layer, which has been subjected to the silver strike plating treatment, to a silver plating treatment.

A coating comprising a urethane resin as a base, and at least polyurethane particles and fluororesin powder is formed on a surface of a member that is, or can be, contacted with an optical disk in an optical disk apparatus. The coating can prevent the optical disk, i.e., a CD, a DVD, etc., from damaging, even if the optical disk is contacted with a tray or an objective lens.

A thermostat independently controlling cooling water passages of two circuits, including a first valve body having first and second passages in constant communication. A third passage is selectively connected to those passages. Communication of the third passage is disconnected when the cooling water temperature is below a prescribed temperature, and the valve is opened when the cooling water temperature is equal to or higher than the prescribed temperature. A second valve body, having fourth and fifth passages selectively in communication, closes the valve to disconnect those passages when the cooling water temperature is below the prescribed temperature, and opens the valve by operating the first valve body to link the passages when the cooling water temperature is equal to or higher than the prescribed temperature. A tubular sleeve prevents first and second control chambers, respectively including the first and second valve bodies, from communicating with each other.

A solar heat collecting device of the flat panel type, a process for its manufacture and parts thereof, made of extruded profiles in particular of aluminium or aluminium alloys. The device comprises a casing accommodating a heat collector assembly comprising a plurality of elongate extruded heat collector bodies, side by side, each having a tube co-axial with its axis of extrusion, flanked on each of its opposite sides integrally by an extruded web and further comprising a manifold at each end to which the respective tube ends are sealingly and communicatingly brazed. The edges of the adjoining webs of adjoining elongate bodies overlap slightly but are movable free of mechanical constraint or mutual attachment in relation to one another. Together the elongate bodies present the incoming solar radiation with a substantially plane uninterrupted area for absorption.

A thermostat independently controlling cooling water passages of two circuits, including a first valve body having first and second passages in constant communication. A third passage is selectively connected to those passages. Communication of the third passage is disconnected when the cooling water temperature is below a prescribed temperature, and the valve is opened when the cooling water temperature is equal to or higher than the prescribed temperature. A second valve body, having fourth and fifth passages selectively in communication, closes the valve to disconnect those passages when the cooling water temperature is below the prescribed temperature, and opens the valve by operating the first valve body to link the passages when the cooling water temperature is equal to or higher than the prescribed temperature. A tubular sleeve prevents first and second control chambers, respectively including the first and second valve bodies, from communicating with each other.

A gasket having a novel structure ensuring both the gas tightness and the low-friction slidability is provided. A sliding portion of the gasket (13) includes at least a first annular projection (17A), an annular recess and a second annular projection (17B) arranged in this order in a direction rearward from a distal portion of the gasket serving as a liquid contact portion. The first projection (17A) is designed so that a first peak appears adjacent the distal portion of the gasket when the gasket is fitted in the syringe barrel (11) and a product α of a contact pressure P1f and a width D1f of the first peak is 0.4≦α≦1.0 as determined by an FEM analysis.

Provided is a lens shifting device that has a simple structure and a small number of components, is compact and lightweight, and has high positional accuracy and slidability. The lens shifting device includes: first plate (12) through which video light passes; second plate (13) connected to first plate (12) via elastic member (23) and having projection lens (6) attached to a position into which the video light that passed through first plate (12) enters; slider (27) disposed to project from second plate (13) and housed in first plate (12) to be movable in a predetermined direction; and guide shaft (14) attached to first plate (12) in the state of being engaged with slider (27) and rotated to move the second plate. Elastic member (23) is disposed between first plate (12) and second plate (13) to connect first plate (12) and second plate (13) in the state of generating an elastic contraction force.

When extrusion of a molten resin by means of an extruder is started, a simple polyetherimide resin is melt extruded from a lip portion 7a of a T-die 7, and a film of the simple polyetherimide resin is molded. The molding material is then switched to a resin composition including the polyetherimide resin and a fluorine resin and then a film of the resin composition is continuously extruded and molded from the T-die 7. Having been covered with a very thin film 8a of the simple polyetherimide resin, on a flow passage face of the lip portion 7a of the T-die 7, a resin composition layer 8b including a polyetherimide resin and a fluorine resin, which has affinity with the film 8a, is then formed at a center part.

A polyarylene sulfide resin composition which is excellent in mechanical strength as well as electromagnetic shielding effect, slidability and moist heat resistance.The resin composition comprises (A) 100 parts by weight of a polyarylene sulfide resin (component A) synthesized through a polymerization reaction using an aromatic disulfide-based compound as a polymerization terminator and (B) 10 to 180 parts by weight of carbon fibers (component B), wholly aromatic polyamide fibers (component C) or glass fibers (component D).

The present invention provides a protective film with high mechanical strength free from dust.A protective film 14 of an optical recording medium 2 is formed by applying and curing a composition for protective films obtained by dispersing in a curable binder material a first lubricant compatible with said binder material and a second lubricant incompatible with said binder material but compatible with said first lubricant. The incompatible second lubricant is stably and homogeneously dispersed to enhance lubricity and slidability while any excessive amount of the lubricant does not deposit on the surface of the protective film. The binder material is desirably photocurable.

A grain-oriented electrical steel sheet according to one embodiment of the present invention includes a steel sheet and an insulation coating, in which the insulation coating contains a first metal phosphate, which is a metal phosphate of one or two more metals selected from Al, Fe, Mg, Mn, Ni, and Zn; a second metal phosphate, which is a metal phosphate of one or two more metals selected from Co, Mo, V, W, and Zr; and colloidal silica, the insulation coating does not contain chromate, and an elution amount of phosphoric acid of the insulation coating as determined by boiling the grain-oriented electrical steel sheet in a boiled pure water for 10 minutes, then measuring an elution amount of phosphoric acid into the pure water, and dividing the amount of phosphoric acid by the area of the insulation coating of the boiled grain-oriented electrical steel sheet is 30 mg / m2 or less.

The invention relates to a processing method for a high-toughness cover plate of a 5G mobile phone. The processing method comprises the following steps of pretreatment of zirconia granulation powder,dry-pressing formation, cooling, vacuumizing packaging, isostatic press formation, step sintering, after-combustion and thickness grinding, cutting, accurate grinding and polishing. The produced coverplate has the advantages of high rigidity, high toughness and the like, and the performance can meet the demand of a consumer of the 5G mobile phone.

Laminated gasket free from liquid drug leakage. A gasket (13) for a medical syringe, with main body (14) made of elastic material, and film (15) provided on a surface of main body (14). Gasket (13) has a circumferential surface portion (17) for contact with an inner peripheral surface of a syringe barrel (11) and an annular groove (22) formed circumferentially in a surface portion of the film in the circumferential surface portion thereof. Annular groove (22) has outer edge portions (24) provided along opposite edges (23) thereof as projecting from an unprocessed surface portion of the film. Annular groove (22) has a groove formation start point and a groove formation end point connected to each other in a groove connection region. Outer edge portions (24) provided along the opposite edges of the annular groove have a maximum-to-minimum height difference of ≤5 μm in the groove connection region.

Laminated gasket free from liquid drug leakage. Gasket (13) to be used for a medical syringe includes main body (14) made of an elastic material and film (15) on a surface of main body (14). Gasket (13) has a circumferential surface portion (17) that can contact an inner peripheral surface of syringe barrel (11) of the syringe, and has an annular groove (22) formed circumferentially in a surface portion of the film present in the circumferential surface portion thereof. Annular groove (22) has outer edge portions (24) provided along opposite edges (23) thereof as projecting from an unprocessed surface portion of the film. Annular groove (22) has groove formation start points and end points that are connected to each other in a groove connection region. Outer edge portions (24) along the opposite edges of the annular groove have a maximum-to-minimum height difference of ≤5 μm in the groove connection region.

A pressure plate is movable in an axial direction to cause multiple driving friction plates and driven friction plates to come in pressure contact with each other. The pressure plate is biased by a clutch spring in a direction to bring the driving friction plates and the driven friction plates in pressure contact with each other. When acceleration torque is changed, an assist mechanism increases the pressure-contact force of the pressure plate. A pressure plate and a clutch inner are connected together and are capable of being separated from each other in an axial direction. When an assist mechanism increases a pressure-contact force of the pressure plate, the pressure plate is moved in a direction to bring driving and driven friction plates into pressure contact with each other, while the clutch inner is moved relative to the pressure plate in the same direction so as to be detached from the pressure plate.

A developing roller (1) is provided, which includes a tubular porous inner layer (2) of a foamed product of a semiconductive rubber composition containing an ethylene propylene rubber and a paraffin oil, and an outer layer (4) of a seamless tube of a semiconductive thermoplastic polyamide elastomer provided on an outer peripheral surface (3) of the inner layer (2), and has an overall Asker-C hardness of not less than 30 degrees and not greater than 60 degrees. A production method is also provided, which includes the steps of: preparing a tube having a thickness T of 100 to 400 μm and having an inner diameter D2 for an outer layer; preparing a tubular inner layer having an outer diameter D1; and press-inserting the inner layer into the tube; wherein an interference represented by a difference D1- D2 between the outer diameter D1 of the inner layer and the inner diameter D2 of the tube is 100 to 400 μm.

A coating composition contains: (A) 60 to 99% by weight of a urethane-based resin emulsion having film-forming ability in terms of a solid content ratio; and (B) 1 to 40% by weight of a silicone-acrylic graft copolymer resin emulsion having an average particle size of 180 nm or less in terms of a solid content ratio, wherein a weight ratio of a polyorganosiloxane represented by a specific chemical formula to an acrylic acid ester unit or a methacrylic acid ester unit is 30:70 to 99:1.

The present invention is a polyolefin rubber composition containing: 100 parts by mass of (A) an ethylene-α-olefin-unconjugated polyene random copolymer; 1-100 parts by mass of (B) an organopolysiloxane having a degree of polymerization of 20 or higher and having 0 or 1-3 alkenyl groups per molecule, the organopolysiloxane being represented by the following average compositional formula (1): RaSiO(4-a) / 2 (in the formula, R represents the same or different monovalent hydrocarbon groups, and a is a positive number of 1.95-2.05); 10-100 parts by mass of (C) reinforcing silica having a specific surface area of 50 m2 / g or higher by the BET method with respect to 100 total parts by mass of components (A) and (B); and 1-150 parts by mass of (D) particles selected from the group consisting of specific organic resin particles, inorganic particles, and silicone powder particles. This polyolefin rubber composition can be compression molded, steam vulcanized, etc., exhibits surface slidability after curing, does not undergo reduction in mechanical properties, and has exceptional blocking resistance.

A corrosion-resistant member (10) provided with: a base material (16) made of aluminum or an aluminum alloy; a diamond-like carbon film (18) formed on a surface of the base material (16) and made of amorphous carbon (a-C) or hydrogenated amorphous carbon (a-C:H); and an epoxy resin-containing coating material (20), which at least fills open pores (24) of the diamond-like carbon film (18).

Medical syringe having a gasket excellent in sealability and slidability. The syringe includes a hollow cylindrical syringe barrel (11) and a gasket (13) fitted in syringe barrel (11). Gasket (13) includes a main body of an elastic material laminated with an inert resin film and has a circumferential surface portion (17) substantially maintained in contact with an inner surface (16) of syringe barrel (11). Gasket 13 also has an annular projection (22), provided on circumferential surface portion (17), extending circumferentially of circumferential surface portion (17). Projection (22) has a contact surface portion maintained in contact with inner surface (16) of syringe barrel (11) and having a width of 30 μm to 40 μm. Circumferential surface portion (17) has non-contact surface portions located out of contact with inner surface (16) of syringe barrel (11) on widthwise opposite sides of projection (22) and having a width of at least 30 μm.