361results about How to "Improve extrusion resistance" patented technology

The invention relates to the field of the processing of lithium-ion battery diaphragms, and discloses a preparation method for a microporous diaphragm. The preparation method for the microporous diaphragm includes the following steps: 1) a principal polyolefin resin and an auxiliary additive are uniformly stirred through a stirring mixer to obtain a mixture I; 2) the obtained mixture I is added into an extruder to be uniformly melted and plasticized into a melt; 3) an intermediate diaphragm is prepared from a cast piece of the melt extruded from a die head; 4) annealing treatment is performed on the intermediate diaphragm under bi-directional micro-tension; 5) the annealed intermediate diaphragm is stretched longitudinally to prepare the diaphragm with a microporous structure. The invention further discloses the microporous diaphragm prepared through the method, which consists of the principal polyolefin resin with a weight percentage of 75 to 99.9 percent and the auxiliary additive with a weight percentage of 25 to 0.1 percent. The preparation method disclosed by the invention has the advantage that the lithium-ion battery diaphragm with a uniform structure, the specific microporous structure and high safety performance can be prepared.

The invention discloses an adhesive for a road antiskid layer. The adhesive is formed by mixing 7-10 parts of modified epoxy resin, 3-5 parts of a modified epoxy curing agent and 10-14 parts of talcum powder in parts by weight, wherein the modified epoxy resin is prepared by dissolving a toughening agent, a coupling agent and an anti-aging agent into 80-120 parts of Bisphenol-A epoxy resin and 40-100 parts of soft epoxy resin; the modified epoxy curing agent is prepared by adding a dispersing agent and a defoaming agent into an epoxy curing agent which is 4-8% of the total volume of the Bisphenol-A epoxy resin and the parts of soft epoxy resin. In the prepared method disclosed by the invention, the preparation technology and operation are very simple and convenient and each step is finished at normal temperatures and pressures, so as to bring convenience to industrial production; the prepared adhesive has excellent mechanical property, deformation property, durability and anti-pollution property and can be well bonded with the original road; the adhesive can be well bonded with stones so that the stones are not easy to come off; and the adhesive has low temperature flexibility and does not crack after extrusion.

The invention discloses an air-conditioning temperature-reducing and light-tight preservation box for delivering or storing vegetables in short term. The air-conditioning temperature-reducing and light-tight preservation box comprises a box body and a box cover airtightly covering on an upper opening of the box body; an insulating layer is coated on an inner side wall of the box body; an isolating bracket is arranged at the bottom of the inner side of the box body; a through hole is formed on the isolating bracket; a fluid refrigerant bag is arranged at the bottom inside the box body on the lower part of the isolating bracket; a plurality of air holes are formed on two symmetrical side surfaces of the box body; a selective ventilated membrane coats on the plurality of air holes on the inner side of the box body; and a reflecting coating is arranged on the outer surface of the box body. The air-conditioning temperature-reducing and light-tight preservation box has the advantages that: the preservation box has good function of protecting the vegetables, and is repeatedly used, extrusion resistant, and convenient to load and unload; the tightness of the box body and the selective ventilated membrane which is adhered to the holes on the two side surfaces have good air-conditioning function; by adjusting the number of the holes, the ventilating area of the selective ventilated membrane is adjusted, so that the aim of changing the gas components in the preservation box is fulfilled; the vegetable ageing is prevented; and the repeatedly used ice bag can realize the function of reducing the temperature.

The invention provides a battery pack and a battery case thereof. The battery case comprises a bottom plate, a plurality of first beams, a plurality of second beams, a plurality of corner connectors,aplurality of fixed beams, and a plurality of fixed beam connectors, wherein the first and second beams are fixed on the bottom plate to form an accommodating cavity, each first beam is provided witha first cavity, and each second beam is provided with a second cavity; each corner connector is provided with a first connecting portion and a second connecting portion, which form a first angle, thefirst connecting portion of each corner connector islocated in the first cavity of the corresponding first beam and fixedly connected to the first beam, the second connecting portion of each corner connector is located in the second cavity of the corresponding second beam and is fixedly connected to the second beam; the fixed beams are fixed on the bottom plate and are located in the accommodatingcavities., and two ends of each fixed beam are connected with the second beams, respectively; each of the fixed beam connectors is connected with a fixed beam and a second beam. The reliability of the battery case provided by the invention is improved.

The invention relates to a system and process for manufacturing a carbon fiber composite core of an electric transmission line. The invention is characterized in that the system comprises a yarn frame, a yarn-collecting board, a preheater, a double-roller constant-temperature replaceable glue tank, a glue-squeezing device, a primary preforming device, a carbon fiber preheating mold, a secondary preforming and coating device, a curing mold, a postheating oven, an air cooling device, a tractor and a winding machine which are sequentially connected, wherein a cloth guide frame is mounted above the secondary preforming and coating device, the carbon fiber preheating mold and the curing mold are respectively sheathed with a heater, and both sides of the carbon fiber preheating mold are provided with glass fiber yarn guide boards. In the preparation method provided by the invention, repeated experiments are carried out on the high-performance resin system, and the outermost layer is coated with the glass fiber cloth by fully considering characteristics of carbon fibers and high-strength glass fibers, thereby enhancing the transverse strength of the product, improving the cracking resistance of the product and realizing the feasibility of the process. Thus, the invention solves the problem that high-performance resin is difficult to pultrude.

The invention relates to the processing field of lithium ion battery diaphragms and discloses a high-puncture-strength lithium ion battery diaphragm. The high-puncture-strength lithium ion battery diaphragm consists of 75 to 99.9 weight percent of main body olefin resin and 25 to 0.1 weight percent of an auxiliary additive. The invention further discloses a method for preparing the high-puncture-strength lithium ion battery diaphragm, which comprises the following step: carrying out transverse stretching on a micropore diaphragm which is longitudinally stretched, wherein the traveling speed of the micropore diaphragm is 0.5 to 200 mm / min, the stretch temperature is 100 to 150 DEG C and the stretching multiplying power is 0.5 to 3.0. According to the invention, one step of transversely stretching is added on the basis of one-way stretching in an existing dry method; and by transverse stretching according to a certain ratio, under the condition of not influencing basic performance of the micropore diaphragm (air permeability, porosity and the like), the transverse intensity of the micropore diaphragm is improved, i.e. the puncture-resistant intensity of the micropore diaphragm is improved, so that the diaphragm can be better suitable for assembling of a battery, the micro short circuit problem caused by lithium dendrite puncture is reduced or avoided and safety of the battery is improved.

The invention relates to a separation membrane for a gel-state polymer lithium-ion battery. The separation membrane is prepared by using a separation membrane body made of polypropylene and polyethylene materials as a substrate, and coating a layer of polymer colloid material and inorganic filler coating on the surface of substrate. The thickness of the polymer colloid material and inorganic filler coating is 1-5 mu m, and porosity of the separation membrane subjected to coating treatment ranges from 30%-50%. The polymer colloid material is a mixture composed of polyvinylidene fluoride, vinylidene fluoride-hexafluoropropylene copolymer, polyacrylonitrile and polymethyl methacrylate. The inorganic filler is composed of nanoscale inorganic powder material aluminium oxide, silica or their mixture, and the granularity ranges from 50nm to 200nm. The lithium-ion battery manufactured by the separation membrane is good in safety, short circuit resistance, needling resistance, impact resistance and extrusion resistance of the battery are improved, and the separation membrane for the gel-state polymer lithium-ion battery can be widely used in the field of electromobiles, electric motor cars, electric bicycles, large-medium type energy-storage batteries, photovoltaic stations and the like.

The invention discloses a mining anti-extrusion high-wear-resistance cable comprising a supporting core, a connecting ring, a supporting rod, a cable core, multiple axes, an insulating layer, a jacket layer, an armored layer and a filling body, wherein the jacket layer comprises the following raw materials in parts by weight: 90 parts of butadiene-nitrile rubber, 45 parts of chloroprene rubber, 40 parts of ethylene propylene diene rubber, 35 parts of chlorinated polyethylene, 19 parts of maleic anhydride grafted EVA (ethylene vinyl acetate copolymer), 7.5 parts of zinc oxide, 3 parts of chlorinated paraffin, 5.5 parts of calcium stearate, 7.5 parts of white carbon black, 10 parts of talc powder, 9 parts of active kaolin, 5 parts of antimony trioxide, 4.5 parts of triphenyl phosphite, 4 parts of magnesium hydroxide, 4.5 parts of aluminum oxide, 5.5 parts of an anti-aging agent RD, 3.5 parts of an N,N'-di-sec-butyl-p-phenylenediamine antioxidant, 4 parts of a curing agent DTDM and 5.5 parts of a curing agent PDM. The cable is excellent in extrusion resistance and wear resistance.

The invention discloses a method for preparing a lithium ion battery diaphragm. The diaphragm is an insulated coating arranged on the surface of an anode plate or a cathode plate. The method comprises the following steps of: (1) dissolving 3 to 7 weight parts of polyvinylidene fluoride into 40 to 60 weight parts of organic solvent, adding 1 to 3 weight parts of inorganic powder, and mixing uniformly to obtain slurry; (2) spraying the slurry to the surface of the anode plate or the cathode plate, and placing the anode plate or the cathode plate in a box with the relative humidity of 85 to 98 percent for 2 to 5 minutes; and (3) taking the anode plate or the cathode plate out of the box, and baking the anode plate or the cathode plate at the temperature of between 80 and 150 DEG C till the anode plate or the cathode plate is dried. The method for preparing the diaphragm is simple, easy to implement and convenient for industrialized production; and because inorganic particles are doped in the diaphragm to form a skeleton, the extrusion resistance of the diaphragm is improved, shrinkage of the diaphragm at a high temperature can be prevented, and the safety of the lithium ion battery is improved.

The invention discloses a ceramic composite grinding roller of a medium speed coal grinding mill, which comprises an arc-shaped lining board formed by casting high-chromium alloy, wherein the arc-shaped lining board is provided with a through hole inside which oxide, nitride or carbide ceramic rod is embedded via adhesive, the arc-shaped lining board and the ceramic rod form a metal ceramic composite plate, the metal ceramic composite plate is adhesively connected with a roller core via the adhesive, the metal ceramic composite plate is provided with a bolt through hole, the bolt through hole is internally provided with a bolt which is directly fastened with the roller core and coated with threaded adhesive, and a ceramic cover is inlaid above the head of the bolt. The ceramic composite grinding roller is reasonable in structure and outstanding in shear resistance, extrusion resistance and abrasive resistance.

The invention provides a shielding type digital symmetrical cable which comprises a crossed framework, an inner belting layer, a shielding layer, an outer belting layer and an outer sheath from the center to the outside in sequence, wherein the crossed framework and the inner belting layer form four chambers; each chamber is internally provided with a twisted pair set; the twisted pair set is formed by twisting two insulating single cables; each insulating single cable comprises a cable core and an insulating layer; the insulating layer is wrapped outside the cable core; and the crossed framework is a polyethylene crossed framework. The shielding type digital symmetrical cable has the advantages of excellent flexibility and convenience in cabling construction. The crossed framework enhances the tensile performance and the extrusion resistant performance of a cable. The low-frequency disturbance of the cable is effectively offset by using the balance characteristic of the twisted pair set by setting a twisted pair pitch, so as to ensure excellent working condition of the cable in low-frequency disturbance; and the crosstalk can be controlled when the data frequency is high.

A method for manufacturing a fishing rod, which relates to a method for manufacturing a fishing tool. According to the size required by the design, at least two main cloths with an included angle of 5°-25° between the reference side and the carbon fiber pattern of the carbon fiber cloth are cut out; the main cloths are superimposed Lay together, the carbon fiber lines of the two adjacent main fabrics are in a cross shape; on the mold, use a carbon tape to form an inner winding layer at an angle of 10°-30° to the radial direction of the mold to form an inner winding layer; The final main cloth roll is rolled on the inner winding layer; then an outer winding layer is wound clockwise with a carbon tape and the radial direction of the mold at an angle of 10°-30°; finally, the BOPP release tape is wound and baked at high temperature. Exit the mold, remove the BOPP release tape, trim, polish, paint, and assemble to become a fishing rod. The fishing rod has good toughness, high strength, good conductivity to force, high sensitivity, and good pressure resistance. The tip of the fishing rod is not easy to break when it is twisted by force, and the rod body is not easy to break when it is squeezed by external force.

The invention discloses a cell carrier particle aggregate and a preparation method thereof. The cell carrier particle aggregate is formed by aggregating cell carrier particles and has specific shapes;the specific shapes include a sheet shape and a block shape. The cell carrier particle aggregate has excellent rehydration property and good dispersibility after rehydration. The cell carrier particles in the cell carrier particle aggregate have porous connectivity inside, and have great elasticity and extrusion resistance. After the aggregate is prepared by pressing, a very small amount of liquid carrier particles can be quickly dispersed into a single carrier stent without any change in physicochemical properties; no other component is added, powder does not exist on the surface of the aggregate obtained by the forming method, so that the static electricity of the aggregate is reduced as much as possible, and the loss caused by the static electricity of a powder product is avoided. Besides, single-piece quantitative sterilization storage in the form of a medicine plate can be achieved, the aggregate can also be quantitatively sterilized and stored in multiple pieces in a bottled form, independent packaging and sterilization are achieved, and aseptic operation of cell culture is facilitated.

The invention discloses a heat preservation technology for a continuous dip bleaching stage of a one bath one step method for cotton fabric and cotton blended fabric. According to the heat preservation technology, based on the prior art, a structure comprising a boiling box and a washing machine is improved to a sealed drum structure with an impeller so that the fabric can be fully spread and will not cluster or gather or form a pile in the processing process, and the boiling off effect and the blenching effect are good; the fabric is boiled and blenched at a low temperature firstly and then boiled and blenched at a high temperature, so that the decomposition rate and the decomposition products of hydrogen peroxide are effectively controlled, various kinds of processing liquid flow in the direction opposite to the movement direction of the fabric in a drum, and therefore the processing effect is further improved; through the continuous production mode, the good boiling-off effect and the good blenching effect are achieved, the degree of oxidative damage to fibers is reduced to the greatest extent, the production efficiency is high, the consumption of water, electricity and steam is low, technical control is simple, adjustment is convenient, and flexible production can be achieved.

The invention relates to a combined type fender, which is a protective device to be used in docks, shipping and oceanographic engineering. The combined type fender is characterized by consisting of a shell, a buffering protective layer and a liner. The combined type fender integrates the advantages of various fenders, has the characteristics of toughness, extrusion resistance, fatigue resistance, ageing resistance and long service life of a fender taking rubber as a buffering medium, and avoids the disadvantages that the weight is large, the fender cannot float on a water surface, energy absorption is less and counter-force is large; the combined type fender also has the advantages of light weight, convenient installation, large energy absorption, small counter-force and pricking resistance which are possessed by a fender taking a foaming material as the buffering medium, and avoids the disadvantages of slow response speed and short service life; and in addition, the combined type fender also has the advantages of light weight, convenient installation, large energy absorption, small counter-force, quick response speed, capability to backpressure adjustment on the energy absorption and the counter-force and the like which are possessed by an air inflation type fender taking gas as the buffering medium, and avoids the defects that the combined type fender is easy for pricking, aging and air leakage, and needs to be maintained frequently.

The invention discloses a fruit and vegetable storage and transportation fresh-keeping box with the functions of sterilization and pesticide residue degradation, comprising a box body and a box cover, wherein the box cover hermetically covers on an upper opening of the box body; a heat insulating layer is coated on the inner side wall of the box body, and an anti-oxidation layer is coated outside the heat insulating layer; the box cover is provided with a small-size ozone generator capable of continuously generating ozone; the bottom of the inner side of the box body is provided with a partition rack; the partition rack is provided with a through hole; a fluid refrigerant bag is arranged on the lower part of the partition rack at the bottom inside the box body; and the inner side surface of the box cover is provided with the small-size ozone generator. The invention has good green physical fresh-keeping effect on fruits and vegetables, repeated use and extrusion resistance and is beneficial to assembly and disassembly; ozone generated by an ozone generating device inside the box body has the functions of sterilization, pesticide residue degradation, the removal of ethylene generated by the fruits and the vegetables, and the like, therefore the purpose of green safe fresh-keeping of the fruits and the vegetables can be realized through the ozone; the through hole of the bottom partition rack is beneficial to the circulation of the ozone inside the fresh-keeping box, therefore the fresh-keeping effect of the fruits and the vegetables is enhanced; in addition, the effect of temperature reduction can be realized through the repeatedly used fluid refrigerant bag.

The invention discloses a flexible cable used for a new energy automobile. The cable comprises a conductor and an insulation layer used for wrapping the conductor. The outer part of the insulation layer is provided with a cooling layer in a wrapped manner, and at least one cooling medium channel extended along the length direction of the insulation layer is disposed in the cooling layer, and is used to introduce the cooling medium for the cooling and the heat dissipation of the insulation layer. Heat energy radiated by the insulation layer outwardly is effectively, reliably, quickly, and greatly eliminated by the cooling medium, and then the heat energy radiated on the outer part of the cooling layer is reasonable, controllable, and safe, and then the special use requirement of the new energy automobile is satisfied. The flexible cable is in service and operated reliably, safely, and stably in various severe environments, and has advantages of simple structure, convenient forming, small forming difficulty, low forming costs, compact structure, good flexibility, excellent heat dissipation effect, high flame resistant performance, high reliability, good safety performance, and strong practicability.

The present invention relates to a lithium manganate plastic housing cylindrical battery and a preparation method thereof, wherein the battery is applicable for lithium ion batteries having a medium-large capacity. According to the method, a lithium manganate material, an electric conduction agent, a binder and the like are mixed to obtain a positive electrode slurry; graphite, an electric conduction agent, a binder and the like are mixed to obtain a negative electrode slurry; the positive electrode slurry is coated on an aluminum foil to prepare a positive electrode sheet; the negative electrode slurry is coated on a copper foil to prepare a negative electrode sheet; the positive electrode sheet and the negative electrode sheet are added to a specially designed diaphragm to carry out rolling to obtain a cylindrical rolling core; the rolling core, a plastic housing, end caps, an upper post terminal, a lower post terminal, an inner gasket, an outer gasket and fixation nuts are assembled; and finally liquid injection formation is performed to prepare the finished battery. The present invention relates to a lithium manganate plastic housing cylindrical battery and a preparation method thereof, the method has advantages of convenient assembly, high production efficiency and low cost, and battery safety performances such as short circuit resistance, needling resistance, impact resistance, extrusion resistance and the like can be improved by using the specially designed diaphragm.

The invention discloses a compression-resistant and corrosion-resistant cable for ships. A sheath layer comprises the following raw materials in weight part: 60-90 parts of CR122 type chloroprene rubber, 50-80 parts of styrene butadiene rubber, 30-60 parts of EVM rubber, 20-50 parts of chlorosulfonated polyethylene, 10-30 parts of chlorinated polyethylene, 10-30 parts of di(2-Ethylhexyl)-4,5-epoxytetrahydrophthalate, 5-15 parts of isophthalic acid ester, 5-15 parts of oxidized polyethlene wax, 10-30 parts of magnesium carbonate, 2-8 parts of nanometer zinc oxide, 3-9 parts of magnesium oxide, 5-10 parts of eleaostearic acid, 2-8 parts of heptahydrate zinc borate, 3-8 parts of ferrocene, 1-5 parts of aluminium hydroxide, 3-5 parts of carbon black N550, 2-5 parts of nylon 66, 1-5 parts of antioxidant HS-911, 2-6 parts of vulcanizing agent DCP, and 1-5 parts of fire retardant TCP. The compression-resistant and corrosion-resistant cable for ships is reasonably structured, good in compression-resistant performance and strong in corrosion-resistant performance.

The invention discloses a high-strength tooth-form composite halogen-free photovoltaic line cable, and the cable comprises an elastic support, conductor core wires, a fluoroplastic insulating layer, a buffering layer, a steel wire braiding armored layer, an insulating silica gel heat dissipation layer, and a heat dissipation belt. The plurality of conductor core wires are twisted together to form three bundles, and are uniformly the elastic support in a peripheral direction from the inside to the outside. A mineral substance fire-insulating material is placed in a gap between the elastic support and the conductor core wires. The outer side of the elastic support is sequentially wrapped by a metal shielding layer, the fluoroplastic insulating layer, a magnesium and silica alloy braided layer, a buffering layer steel wire braiding armored layer, an insulating silicon gel heat dissipation layer, and a heat dissipation layer. A tooth-shaped projection at an outer layer of the cable is equivalent to a limiting strip. For a plurality of parallel cables, the cable effectively avoid the twisting and mixed winding of cables because the tooth-shaped projection among cables plays a good effect in limiting and fixing, and brings convenience for wiring.

This invention relates to a mineral signal insulation cable including a conductor, an insulator and a jacket characterizing that all of the three are inorganic objects, the conductor is a core of twist copper wires, the insulator is pure MgO powder added with silicon oil and the jacket is a copper jacket formed by continuously welding and the MgO powder is set in the slot between the conductor and the jacket, the process of which is simple and advanced, the outer diameter is small and it's not necessary to protect it with pipes, good signal and phone communication can be kept in fire since it's smokeless and nonpoisonous.

The invention discloses a touch screen, which comprises a circuit layer and a lead wire led out from the circuit layer. The touch screen is characterized by also comprising an upper line ITO film attached to the upper surface of the circuit layer, a mirror face attached to the upper surface of the upper line ITO film through a non-carrier optical adhesive tape, a lower line ITO film attached to the lower surface of the circuit layer, and a support plate attached to the lower surface of the lower line ITO film through the non-carrier optical adhesive tape. The invention also discloses a corresponding touch screen manufacturing method. The touch screen is thin and has extrusion resistance and high lead wire bending degree.

The invention relates to a novel double-compacted steel wire rope and a production technology thereof, and aims to provide a steel wire rope which is stable in physical property and is compacted tightly as well as a production technology of the steel wire rope. All pickled and phosphatized steel wires are drawn for the first time, then annealed, dried and drawn again after dried, and various finished steel wire products are formed. Third center steel wires, inner-layer steel wires, filling steel wires and third outer-layer steel wires are twisted and then rolled, steel wire rope first outer-layer strands are produced and twisted on the outer side of a rope core in a wrapping manner, a steel wire rope is twisted, the twisted steel wire rope is forged, and the forged steel wire rope is warehoused. The section area of each steel wire rope first outer-layer strand after rolling is 8%-10% smaller than that before rolling, and the section area of the steel wire rope after forging is 10%-13% smaller than that before forging. The rope core adopts 7*7 independent steel cores.

The invention discloses a corrosion resistant and squeezing highly resistant oil casing pipe and a preparation method thereof. The oil casing pipe comprises, by weight percentage, 0.22%<=C<=0.30%, 0.15%<=Si<=0.35%, 0.40%<=Mn<=0.60%, S<=0.003%, P<=0.01%, 0.02%<=Al<=0.04%, 0.75%<=Cr<=1.20%, 0.25%<=Mo<=0.55%, Ca<=0.0025%, N<=0.08% and the balanced Fe and unavoidable impurities. The oil casing has theadvantages that the squeezing resistant strength of the prepared oil casing pipe is 30% or above higher than the squeezing resistant strength required by API 5C3 standards, the hydrogen sulfide corrosion resistance performance is conformed to demands in API 5CT (45 edition) PSL3, and the oil casing pipe can be extensively applied to the exploitation of oil and gas wells of acid medium deep wells, ultra-deep wells and the like with complicated geological conditions

The invention discloses a functional composite coated controlled-release fertilizer with a polyolefin wax as a priming coat. The functional composite coated controlled-release fertilizer comprises fertilizer granules and a coating material, wherein the coating material is sprayed to the surfaces of fertilizer granules; the coating material is composed of a polyolefin wax coating, a starch-based polyurethane layer and an epoxy resin layer which are sequentially sprayed to the surfaces of the fertilizer granules; biological stimulin is sprayed between the polyolefin wax coating and the starch-based polyurethane layer or between the starch-based polyurethane layer and the epoxy resin layer. By adopting the functional composite coated controlled-release fertilizer disclosed by the invention, the technical difficulties that a conventional international controlled-release fertilizer is single in function, high in cost and hard to popularize, the controlled-release effect of the fertilizer can be seriously affected by extrusion abrasion in the transportation process, soil pollution can be caused by harmful dyes, sustainable development is hard to achieve as the fertilizer depends on petrochemicals, and excessive residual macromolecule membranes are resulted and are slow to degrade, can be solved, moreover, the problems that the biological stimulin is liable to deactivation when beingin direct contact with soil and fertilizers, release paces of nutrients and stimulin are hard to regulate and control, and the like, can be solved.

The invention relates to a rubber material for a pack-off element of a telescopic joint and a preparation method for the rubber material. The material contains hydrogenated nitrile-butadiene rubber, carboxylated nitrile-butadiene rubber, staple fibers, carbon black, wear-resistant filler, a plasticizer, an anti-aging agent, a vulcanizing agent, a vulcanization accelerator and a vulcanization activator. The preparation method comprises the preparation steps: (1) proportionally weighing the hydrogenated nitrile-butadiene rubber, the carboxylated nitrile-butadiene rubber, the vulcanization activator, the staple fibers, the carbon black, the wear-resistant filler, the anti-aging agent and the plasticizer, sequentially putting the weighed ingredients into an internal mixer, carrying out conventional milling according to the conventional rubber processing method, carrying out roll release, and carrying out tight milling in an open mill; (2) putting the tight-milled rubber mass into an internal mixer, adding the vulcanizing agent and the vulcanization accelerator into the internal mixer, carrying out uniform milling, then, carrying out roll release, and carrying out normal-temperature placement; (3) carrying out back mixing on the milled rubber, and then, carrying out vulcanization forming, thereby preparing rubber telescopic joint pack-off elements. The rubber material provided by the invention has extremely excellent wear resistance, extrusion resistance and adhesion property on the basis of guaranteeing good physical and mechanical properties, so that service lives of products are greatly prolonged.

The invention discloses a plastic ball solid lubricating agent for drilling fluid and a method for preparing the plastic ball solid lubricating agent. The plastic ball solid lubricating agent for the drilling fluid is prepared from the raw materials in parts by weight: 35-56 parts of styrene, 6-10 parts of divinylbenzene, 5-10 parts of acrylic acid, 5-10 parts of polytetrafluoroethylene, 10-20 parts of paraffin, 10-15 parts of silicon dioxide, 0.5-1 part of benzoyl peroxide, 0.5-1 part of polyvinyl alcohol and 0.5-1.5 parts of dodecylbenzene sulfonic acid. The method for preparing the plastic ball solid lubricating agent comprises the following five steps of resistance removing, soaking, crosslinking, sepherical boiling and grading. The high temperature resistance and extrusion resistance of the plastic ball solid lubricating agent for the drilling fluid are improved, the density is close to water density, and the plastic ball solid lubricating agent can realize the purposes of effectively lubricating and preventing blockaged.

The invention relates to an expanding continuous-flow balloon catheter. The expanding continuous-flow balloon catheter comprises an inner catheter, an outer catheter, a balloon and a developing ring, wherein the balloon is connected with the outer catheter and the inner catheter which is provided with the developing ring; the edge of the balloon comprises two flaps or three flaps; after the balloon is filled, one or three hollow channels are formed. The expanding continuous-flow balloon catheter has dredging and expanding functions and a medicament bracket function of a general common balloon catheter; the edge of the balloon comprises two flaps or three flaps, and after the balloon is filled, one or three hollow channels are formed, so that the section of a blood vessel cannot be completely blocked by the expanded balloon, and the blood in the blood vessel is still in a circulation maintaining state. Particularly, when the edge of the balloon comprises three flaps, the three hollow channels are uniformly distributed, and the anti-extrusion performance is high, so that the blood is distributed more uniformly. According to the expanding continuous-flow balloon catheter, the passage outside diameter is small, and the material is soft, so that the expanding continuous-flow balloon catheter is easy to pass a diseased region. The expanding continuous-flow balloon catheter is simple in technical process, and low in production cost.

The invention relates to a sliding ball pin assembly applicable to a thrusting rod of a heavy loading vehicle balance rear suspension, which comprises a ball pin metal joint bearing and end covers, wherein the ball pin metal joint bearing comprises a ball pin and a friction pair outer ring; the middle part of the ball pin is spherical; the outside of the ball pin is assembled with the friction pair outer ring matched with the outside of the ball pin; the ball pin and the friction pair outer ring form a friction pair in a universal moving mode; the twisting and deflecting of the thrusting rod can be converted into relative movement of the friction pair; and the outer circumferential surface of the friction pair outer ring is provided with a layer of polyurethane which sulfates the friction pair outer ring and two end covers into a whole. When the ball pin performs the actions and bears impact, the polyurethane elastic body only bears extrusion; because the stress is simplified and the ball pin only bears the pressure subjected by the elastic body, the service life is greatly prolonged.