99results about How to "Satisfy tightness" patented technology

[Objective]: To provide a low-cost piston member for syringes, with sufficiently satisfying slidability and sealing performance such as non-leakage and vapor impermeability, without size limitation, from small to large diameters.[Solution]: A piston member 10, such as a gasket 10a or a middle piston 10b, is formed by cut-processing a PTFE block and is press-fitted in a syringe barrel 1 to be slidably used. Protruded rims 13 are formed at least in a circumferential direction of perimeter of a slide-contact surface 11a adjacent to a liquid contact surface 14 of a drug solution 30, in a slide-contact surface 11 of the piston member 10, slidingly making contact with an inner circumferential surface 2 of the syringe barrel 1. After cut-processing, pitch P of the protruded rims 13 is 50 μm or smaller, and press-fit margin T to the syringe barrel 1 is 10 to 150 μm.

The invention relates to an engineering material, particularly to a titanium carbonitride-base metal ceramic material for sealing pumps, valves and other machines. The titanium carbonitride-base metal ceramic material is prepared from Ti (C, N) powder, which has wide sources and low cost, as basic material, and binder, inhibitor and other additives as adjuvant materials. The preparation method comprises the steps of completely mixing the raw materials in ethanol or acetone solvent, drying, pressure moulding, placing the obtained blank into a reaction furnace, performing liquid sintering under vacuum or gaseous protection condition, and optimizing to obtain dense material with high hardness, and high bending strength and fracture toughness property. The inventive material has the advantages of resistance against high temperature, corrosion and abrasion, and low cost; and can be used for sealing pumps, valves and other machines. The preparation method has the advantages of simple process and applicability to industrial production; and has wide market application prospect.

The invention discloses a push-pull fast locking round connector, comprising a plug housing (1), an unlocking sleeve (2), a steel ball (3), an opening elastic closing ring (4) and a socket housing (6), wherein the unlocking sleeve (2) is sleeved at the outer side of the plug housing (1), the socket housing (6) stretches into an inner cavity of the plug housing (1), the sidewall of the inner cavity of the plug housing (1) is provided with a groove which is internally provided with the opening elastic closing ring (4), the groove is provided with an opening communicated with the outer side of the plug housing (1), the opening is internally provided with the steel ball (3), the steel ball (3) comes into contact with the opening elastic closing ring (4), the inner side of the unlocking sleeve (2) is provided with a protrusion part pressing the steel ball (3); a clamping slot is arranged the position, corresponding to opening elastic closing ring (4), of the outer side of the socket housing (6), and when the plug is locked with the socket, a part of the opening elastic closing ring (4) is positioned inside the groove and another part thereof is positioned inside the clamping slot. The push-pull fast locking round connector is reasonable in structure, saves space and can meet the demands of the product on fast locking, sealing and prevention of erroneous insertion.

The invention discloses a multi-stage hydraulic expansion tail pipe suspension system with a reducing expansion cone for a horizontal well for thermal recovery of heavy oil. The multi-stage hydraulic expansion tail pipe suspension system comprises a multi-stage hydraulic cylinder power system, the reducing expansion cone, an expansion pipe hanger (27) and a hydraulic-mechanical dual-acting release system and also comprises a multi-stage hydraulic cylinder sleeve (2) and a hollow piston rod (3), the reducing expansion cone comprises an upper claw plate (7), a reducing expansion block (8) and a lower claw plate (9), and the hydraulic-mechanical dual-acting release system comprises a release body (10), a torque sliding sleeve (11), a release coupling (12), a sleeve claw (13), a pin clamping seat (14) and a pressure-keeping ball seat (16). The multi-stage hydraulic expansion tail pipe suspension system has the beneficial effects that since the multi-stage hydraulic cylinder power system is adopted, the safety factor is larger, and the scope of application is wider; since the reducing expansion cone is adopted, the adaptability of the system is improved; and since the hydraulic-mechanical dual-acting release system is adopted, operating risks are reduced, and the stability of the device is improved.

The present invention provides an alkali-developable photo curable and heat curable one-liquid solder mask composition and the printed circuit board using the composition, and the composition has the advantages of excellent coating film characters such as heat resisting property, closing property, non-electrolysis gold plating resisting property and the electrical characteristic, etc., and little fog. The invention provides a photo curable and heat curable one-liquid solder mask composition and the printed circuit board using the composition, and the composition includes the following components: (A) a carboxylated photo sensitive resin which is provided with more than two ethylenically unsaturated groups in one molecule and more than one carboxyl, and the acid strength pKa of the carboxyl is below 5.0; (B) a diluent; (C) a a photopolymerization evocating agent; (D) a cyanuramide or the organic acid salt; and (E) an inorganic filler.

To provide an adhesive agent for a polarizing plate capable of satisfying a wetting property when a transparent protection film is coated with it and satisfying an optical characteristic, in which the obtained polarizing plate has water-resistance at a high temperature. The adhesive agent for the polarizing plate used for providing the transparent protection film on at least one surface of a polarization element is a resin solution containing a polyvinyl alcohol based resin, a crosslinking agent and a leveling agent containing a compound having an acetylene skeleton. The leveling agent is formulated at a ratio of 0.01-10 pts.wt. relative to 100 pts.wt. of the polyvinyl alcohol based resin.

The invention discloses a high-intensity transparent bonding agent and a preparation method thereof. The high-intensity transparent bonding agent is prepared from the following raw materials including silane modified polymers, plasticizers, gas phrase white carbon black, dewatering agents, coupling agents, antioxidants, ultraviolet stabilizers and catalysts, wherein the silane modified polymers are one or several materials in silane modified polyether, silane terminated polyether and silane terminated polyurethane prepolymers. The silane modified polymers are used as substrate resin; the prepared bonding agent has good transparency and high intensity; the bonding sealing requirements in some specific occasions can be completely met; the good bonding performance is realized; the surface bonding and sealing of most substrates can be met; no corrosion is caused on the substrate; the excellent high-low-temperature-resistant performance and weather-resistant performance are realized; the appearance and the performance are kept not to generate obvious change for a long time; an organic tin catalysis scheme can be used; green and environment-friendly effects are achieved; the high-intensity transparent bonding agent can be applicable to some products forbidden to use the organic tin compounds.

The invention discloses a lubricant composition used in an electric mechanical transmission device. The lubricant composition is prepared from a complex of trimellitate and poly-alpha-olefin serving as base oil as well as a plurality of composite additives comprising a rust inhibitor, an antioxidant, an oiliness agent, an anti-wear agent, a metal deactivator, a friction modifier, an anti-foaming agent, an oxidation-resistant and corrosion-resistant agent, a detergent and a dispersing agent. The lubricant composition disclosed by the invention has excellent detergency and dispersibility, cooling property, lubricating property, sealing property, friction property, rust-inhibiting property, corrosion resistance and extreme pressure anti-wear property; by the lubricant composition, a layer of uniform and continuous oil film having a certain thickness is easily formed in a movement friction pair, the coefficient of friction in the movement is decreased, the carrying capacity is increased and the phenomenon of adhesion of transmission members and vibration and noise are reduced.

An electrophotographic developing roller in which air tightness and electrical conductivity in a fit section between a cylindrical metal base body and a metal flange are satisfactory and outside diameter deflection accuracy is satisfactory; and an electrophotographic developing roller which is relatively inexpensive, excellent in mechanical rigidity, surface processability and plating film formation (corrosion resistance) and capable of being satisfied with a prescribed dimensional accuracy are provided. The electrophotographic developing roller is a developing roller having a cylindrical metal base body and a metal flange. The metal flange has a larger diameter section to be fitted in the opening end inner surface of the cylindrical metal base body and a smaller diameter section serving as a central shaft body coaxial with the cylindrical metal base body. The fit section surface of the larger diameter section before being press fitted has an uneven shape such that a maximum surface roughness Ry due to a circumferential groove formed by cutting processing is from 25 μm to 70 μm.

An electrophotographic developing roller in which air tightness and electrical conductivity in a fit section between a cylindrical metal base body and a metal flange are satisfactory and outside diameter deflection accuracy is satisfactory; and an electrophotographic developing roller which is relatively inexpensive, excellent in mechanical rigidity, surface processability and plating film formation (corrosion resistance) and capable of being satisfied with a prescribed dimensional accuracy are provided. The electrophotographic developing roller is a developing roller having a cylindrical metal base body and a metal flange. The metal flange has a larger diameter section to be fitted in the opening end inner surface of the cylindrical metal base body and a smaller diameter section serving as a central shaft body coaxial with the cylindrical metal base body. The fit section surface of the larger diameter section before being press fitted has an uneven shape such that a maximum surface roughness Ry due to a circumferential groove formed by cutting processing is from 25 μm to 70 μm.

The invention relates to an intelligent comprehensive test device for a breather valve for an oil tank truck. The intelligent comprehensive test device comprises a vacuum pump, an air compressor, a test container, a pressure stabilization tank, a human-computer interaction computer system and a high-accuracy gas flowmeter set; the pressure stabilization tank is connected with the test container; the pressure stabilization tank is also connected with the vacuum pump for vacuumizing the test container; the pressure stabilization tank is also connected with the air compressor for providing a positive pressure gas medium to the test container; the test container is provided with a leakage rate detection hole; the leakage rate detection hole is connected with the high-accuracy gas flowmeter set; and the human-computer interaction computer system for controlling the vacuum pump, the air compressor and the test container is connected with the vacuum pump, the air compressor and the test container. The intelligent comprehensive test device has the advantages of complete function, convenience and rapidness for mounting and low cost; and the designed test container can meet requirements of different specifications of internal and external breather valves for positive pressure and negative pressure opening tests, a valve seat sealing performance test and an overturn sealing performance test.

The invention discloses a lightened high-temperature and high-pressure composite cylinder and a manufacturing method of the lightened high-temperature and high-pressure composite cylinder. The composite cylinder comprises filler necks and a bottle body, wherein the filler necks are arranged at two ends of the composite cylinder, the bottle body is arranged in the middle of the bottle body and sequentially comprises an ablation-resistant thin-wall metal liner, a ceramic tile thermal-insulation layer, a rubber thermal-insulation layer and a winding layer from inside to outside, and the winding layer is made of carbon-fiber-reinforced-resin-base composite materials. The manufacturing method comprises the following steps: (1) spheroid forming, (2) sand core forming, (3) metal liner forming, (4) thermal-insulation layer forming, (5) winding layer forming and (6) demolding and sand core dissolving. The composite cylinder has the advantages that a thin-wall metal material is taken as a liner, the light and high-temperature-resistant ceramic tile-rubber composite thermal-insulation layer is creatively utilized, and a ceramic tile in a quartz-fiber porous skeleton structure is taken as a main thermal-insulation material and is externally supplemented with a layer of rubber to be taken as an airtight layer, so that the weight of the thermal-insulation layer is reduced by 70-80% when the long-time high temperature resistance and ablation resistance are guaranteed, the working efficiency of an engine is substantially increased, and the requirements of a power system for the high total impulse and the high thrust are met.

This invention relates to a kind of fiber enhancement type thermoplastic plastic complex pipe high pressure connecting joint. It includes polyolefin capacity sleeve accompany the metal electric fuse; the sleeve has axial sagging structure. The metal sleeve tabling that correspond the axial sagging structure surrounds the capacity sleeve on inside surface. The metal sleeve is surrounded by glass reinforced plastic, the basis material fiber of the glass reinforced plastic enwind along the circle direction of metal sleeve. This invention uses compact structure in order to elevate the working pressure of the fiber enhancement type thermoplastic plastic complex pipe that using this connecting joint and the making is convenient, and easy to carry out.

The invention discloses a preparation process for a radiator good in sealing performance. The preparation process comprises the steps of preparing die casting aluminum alloy and an insert. A first annular groove is formed in the horizontal contact surface of the insert and the die casting aluminum alloy. A second annular groove is formed in the vertical contact surface of the insert and the die casting aluminum alloy. A first annular protrusion is arranged in the position, matched with the first annular groove, of the die casting aluminum alloy. A second annular protrusion is arranged in the position, matched with the second annular groove, of the die casting aluminum alloy. Preparation of the die casting aluminum alloy and the insert comprises the following steps of raw material smelting, die casting, machining, cleaning and packing, and cleaning and packing are conducted after machining is completed and the die casting aluminum alloy and the insert are qualified after being subjected to leakage testing. According to the preparation process for the radiator good in sealing performance, leakage testing is conducted under the condition of 0.2 MPa air pressure, and leakage is avoided, so that the leakage problem of a part inlaid with the insert in the aluminum alloy die casting industry is solved; the requirements for the sealing performance, the heat dissipation performance, the mechanical strength and other performances in the using process of the radiator can be met, the maintenance cost is reduced, the production efficiency is high, and the market competitiveness is very high.

A flanged member (1), intended to be included as a component in a flanged joint, for installation in a pressure equipment device, and having a first flanged end (3) having a first end surface (10) intended to be assembled together with another end surface (4) of a flanged end (11) on another, second flanged member (2) constituting a second component in the flanged joint. The first end surface is slightly concave in the radial direction over at least a part of the extension thereof in the radial direction.

The invention provides a gas-state fuel cyclone integrated igniter, comprising a plasma igniter which is mainly formed by an inner electrode located at the center, a grounding electrode located outside the inner electrode, an insulating medium between the inner electrode and the grounding electrode, and a power supply connector, and further comprising a gas-state fuel cyclone device assembly which is mainly formed by a cyclone device assembly shell and cyclone devices mounted inside the cyclone device assembly shell, wherein the cyclone device assembly shell is annular; a plurality of the cyclone devices are uniformly distributed in the annular cyclone device assembly shell; the annular cyclone device assembly shell is provide with a gas-state fuel gas inlet; the plasma igniter is located in the annular cyclone device assembly shell; the grounding electrode is provided with a plurality of tangential gas inlet small holes; and the cyclone device assembly shell and the grounding electrode are integrally connected through a pressing cover. The gas-state fuel cyclone integrated igniter is applied to the field of heat energy and power engineering, can realize the reliability of ignition, and guarantees that a combustion speed reaches to a stable state.

The invention provides a battery pack with high heat dissipation performance. A temperature sensor is used for transmitting an internal temperature signal to a programmable logic controller (PLC), a fan is controlled to work by the PCL according to a temperature in the battery pack, and heat of a battery module is taken away by wind; by a ventilation device, the sealing performance and the heat dissipation performance of the battery pack are simultaneously satisfied, and the working of the ventilation device is controlled by a travel switch and the PLC to achieve automation; by arranging a liquid-cooling device, the rapidness of heat dissipation is ensured, the temperature consistency of the battery module in the battery pack is ensured as well as the heat is dissipated; and by dual cooling of the liquid-cooling device and the ventilation device, the battery module can be enabled to obtain a good ventilation and cooling effect.

The invention discloses a nuclear power station steel arch roof structure and an assembly construction method thereof. The steel arch roof structure is characterized in that arch main beams are distributed in parallel at intervals and are connected through arch secondary beam units to form an arch roof framework, and a roof structure panel is welded on the upper surface of the arch roof frameworkto form a sealed steel arch roof structure. The steel arch roof structure assembly construction method comprises the steps of arch main beam plane assembly part assembly, assembly supporting system arrangement, main beam plane assembly part and four tubular column support vertical assembly, arch main beam vertical assembly, arch secondary beam unit assembly, positioning precision adjustment, archroof framework assembly, roof structure panel assembly and whole arch roof assembly, and finally assembly supporting system and assembly positioning system disassembly, so that the steel arch roof structure is assembled finally. The assembly construction method can remarkably reduce structural deformation, simplify construction procedures, improve installation precision and improve construction efficiency, and can be applied to the field of building construction of the same type of structure.

The invention discloses a sealing device with a function of quick locking. The sealing device comprises a body base, an oil pipe penetrating through the body base, and an O-shaped ring which is arranged on the outer end face of a flange of the body base. The sealing device is characterized in that a symmetric rotation clamping device and a compression sealing device are arranged on the body base.In the design, the clamping technology that wedge surfaces compress pin shafts, the pin shafts transfer force to clamping blocks, and the clamping blocks are centered to tightly hold a pipe piece is adopted, and the integrated cone-sleeve cooperation sealing technology that the sealing ring is axially compressed is adopted. The device has no requirements for a special structure of a steel pipe piece connection end, the device is easy to assembly, install and operate, the structure is compact and smart, the cost is low, the practicability is high, and the device can be reused.

The embodiment of the invention discloses an electric vehicle battery box refrigeration device, and relates to the technical field of electric vehicles. The device is invented on the premise of satisfying the sealing performance of the battery box in order to simply and conveniently control the temperature in the battery box. The electric vehicle battery box refrigeration device comprises a power supply control system, a semiconductor refrigeration sheet connected with one end of the power supply control system, and an external heat dissipation system and an internal heat dissipation system which are connected with the other end of the power supply control system; when the temperature in the battery box is higher than a first preset value, the power supply control system controls the semiconductor refrigeration sheet to refrigerate, and the battery box is cooled through the external heat dissipation system and the internal heat dissipation system; and when the temperature in the battery box is higher than a second preset value, the power supply control system controls the semiconductor refrigeration sheet to heat, and the battery box is heated through the external heat dissipation system and the internal heat dissipation system.

The invention relates to a separating apparatus for a liquid hydrogen fluoride solution. The separating apparatus comprises: a jacket type sealed reactor, wherein a filter membrane sleeve is fixedly arranged in the jacket type sealed reactor, the jacket type sealed reactor is communicated with atmosphere through a first pipeline, and the first pipeline is provided with a first absorber used for absorbing hydrogen fluoride gas; a jacket type sealed collector, which is communicated with a liquid outlet pipe through a second pipeline; a second absorber arranged at the lower stream of the jacket type sealed collector and used for absorbing hydrogen fluoride gas, wherein the second absorber is communicated with the jacket type sealed collector through a third pipeline and with the liquid outlet pipe through a fourth pipeline; and a pump arranged at the lower stream of the second absorber and used for generating negative pressure in the jacket type sealed reactor and the jacket type sealed collector. The invention further provides a separation method of the separating apparatus. The separating apparatus and method provided by the invention meet requirements for leakproofness, low temperature performance, safety and environmental protection of separating process for the liquid hydrogen fluoride solution.

The invention relates to a gas-liquid sealing detection device. It mainly solves the problems that the existing seal detection is easy to pollute the tested product, the testing site needs to be cleaned frequently, the instability and detection accuracy of manual detection is poor, the work is cumbersome, and the workload is heavy. The gas-liquid seal detection device, the detection mechanism includes an upper module, an upper module mounting seat, a lower module, a feed valve, a gas supply pressure mechanism, and a liquid supply pressure mechanism; the upper module is installed on the upper module mounting seat , the mounting seat of the upper module is provided with a lifting mechanism; the middle part of the upper module is provided with a detection piece connection port; the feed valve is connected in parallel with a gas supply pressure mechanism and a liquid supply pressure mechanism; the sorting mechanism includes a material receiving channel, a pendulum rod; the feeder channel is in the shape of a "herringbone". The gas-liquid sealing detection device has a simple and reasonable structure, can meet the comprehensive requirements of gas tightness testing and liquid tightness testing, and has high working efficiency.

Provided is a transfer film for decoration, which exhibits satisfactory molding performance during injection molding, while having excellent surface protection performance. A transfer film for decoration according to the present invention is obtained by sequentially laminating, on the surface of a supporting film, a mold release layer (2), a hard coat layer (3), a primer layer (4), a decorative layer (5) and a bonding layer (6). The hard coat layer (3) is formed of a tack-free ultraviolet curable composition which contains at least an acrylic acrylate resin that contains a hydroxyl group and has a weight average molecular weight of from 40,000 to 100,000 (inclusive), an ultraviolet initiator, silica particles having an average particle diameter of from 10 nm to 100 nm (inclusive), and a polytetrafluoroethylene powder having an average particle diameter of from 1 μm to 10 μm (inclusive). The primer layer (4) is formed of a two-package curable resin which contains at least an acrylic polyol resin, a polyisocyanate compound and a vinyl chloride-vinyl acetate copolymer resin containing a hydroxyl group.

An evaporation chamber of a liner-type evaporative cooling apparatus is composed of a liner make of metal sheet and an outer reinforced framework. The evaporation chamber is easy to implement sealing and heat transference to the semi-conductor power device; and has easy processing and low cost.

The invention discloses a self-compensation intelligent lip-shaped seal. The self-compensation intelligent lip-shaped seal comprises a working cavity outer shell, a sealing ring body in interference fit with the outer shell, a metal framework inlaid in the sealing ring body, a common metal spring inlaid in a groove in the lower part of the sealing ring body, an SMA memory alloy ring nested in thecommon metal spring and a rotating shaft in contact with the sealing ring body; and the SMA memory alloy ring and the common metal spring jointly ensure the contact pressure between a sealing lip anda shaft, the radial force is mainly provided by the common metal spring in a low-temperature section and a normal-temperature section, and the radial force is mainly provided by the SMA memory alloy ring in a high-temperature section. According to the self-compensation intelligent lip-shaped seal, the SMA memory alloy ring is nested in the common metal spring, so that compensation of the radial force in a high-temperature environment is met, excessive abrasion caused by overlarge radial force in a low-temperature environment is avoided, and stable and long-term intelligent sealing in a wide temperature region can be realized.

The invention discloses a rear compartment structure for an all-terrain vehicle and belongs to a vehicle compartment body structure. The invention aims to provide a rear compartment structure for a double-body special off-road vehicle, which is not only firm in structure but also is convenient for passengers to escape. The rear compartment structure for the all-terrain vehicle comprises a compartment body. The compartment body consists of a compartment body framework (8) and a compartment shell (4) fixedly arranged on the surface of the compartment body framework; the left side and the right side of the compartment shell (4) are respectively and fixedly provided with two glass windows (5); the top part of the compartment shell is provided with three transom windows (1); and the rear end of the compartment shell is provided with a compartment door (3). According to the rear compartment structure for the all-terrain vehicle disclosed by the invention, not only is the firmness of the compartment body greatly improved but also the passengers can conveniently escape when a dangerous case occurs. The invention relates to the compartment structure used for the amphibious multifunctional double-body special off-road vehicle.

The invention relates to a solar methane chemical-looping reforming reactor and a using method thereof. The solar methane chemical-looping reforming reactor comprises a rotatable reactor and a gas source connected with the reactor, an oxygen carrier is fixed at the central position of the reactor, an annular jacket is arranged at the outer side of the central position of the reactor, and molten salt is filled in the annular jacket; and a cuboid cavity is arranged outside the annular jacket, and a quartz glass window is arranged on the side, facing sunlight, of the cavity. Through the heat storage characteristic of part of the molten salt, the temperature change of a reaction zone, caused by external sunlight fluctuation, is reduced. The solar energy utilization rate can be improved, the solar heat flow density can be homogenized, the reaction is more stable and controllable, the inactivation of the oxygen carrier, caused by over-high local temperature, can be reduced, and the cost isreduced.

The invention discloses a hanger with a metal auxiliary seal and tubing equipment with the hanger, belongs to the field of oil-gas drilling and production equipment, and aims to provide the high-sealing-performance and long-service-life hanger with a metal auxiliary seal and tubing equipment with the hanger. The hanger comprises a hanger body, wherein a main seal component adopting metal seal is arranged between the shaft shoulder of the hanger body and a lower casing head; an auxiliary seal assembly adopting metal seal is arranged between the top of the hanger body and an upper casing head; and a standard seal gasket ring is arranged between the upper casing head and the lower casing head. The invention is adaptive to the hanger and the tubing equipment using the hanger.

A PTFE resin composition comprising polytetrafluoroethylene or modified polytetrafluoroethylene in an amount between 70 and 90 wt.%, inclusive, and curved carbon fiber in an amount between 30 and 10 wt.%, inclusive. As a result of the addition of a prescribed amount of curved carbon fiber to PTFE or modified PTFE, this PTFE resin composition can be used effectively as a molding material that yields a water-pump lip-seal material that excels in terms of resistance to deformation, resistance to wear, and sealing performance with respect to cooling water. In particular, even if this PTFE resin composition is used in a seal for a cooling-water circulation pump in an automobile, shedding of the carbon fibers can be prevented effectively, even under the harsh conditions to which a cooling-water seal is subjected, and sufficient sealing performance is produced, with no cooling-water leakage or the like due to deformation or wear during use.

A nitrile rubber composition which contains 5 to 50 parts by weight of carbon black, 5 to 60 parts by weight of graphite having a mean particle diameter of 5[mu]m or less, 5 to 50 parts by weight of a conductive carbon material other than these, and further contains, as antioxidants, 1 to 5 parts by weight of an alkylated diphenylamine consisting of a reaction product of diphenylamine with styrene and 2,4,4-trimethylpentene and 0.5 to 2.5 parts by weight of N,N'-di-2-naphthyl-p-phenylenediamine or dilauryl thiodipropionate, each quantity being relative to 100 parts by weight of nitrile rubber. This nitrile rubber composition can yield a vulcanization-molded product that not only keeps characteristics as conductive material but also satisfies characteristics requisite to an oil seal for a rolling bearing for an automobile or the like, namely, muddy water resistance, sealing properties and low-torque properties, and that exhibits a suppressed rubber volume change even when has been exposed to an antifreezing agent and then washed with water.