67 results about "UHMWPE polyethylene" patented technology

The application discloses a kind of corrosion-resistant double-armored submarine cable and preparation method thereof, it is related to submarine cable technical field.The corrosion-resistant double-armored submarine cable includes outer sheath layer, water barrier layer, double-armored layer, insulating inner liner, filling layer, insulating layer, copper conductor in turn from surface to inside;The outer sheath layer is obtained by extruding coating on the surface of double-armored layer by corrosion-resistant submarine cable material;The corrosion-resistant submarine cable material includes the following raw material components: by mass parts, 75-90 parts of high-density polyethylene, 30-50 parts of ultra-high molecular weight polyethylene, 10-25 parts of modified microfiber, 8-15 parts of ethylene-vinyl acetate copolymer, 0.2-0.5 parts of antioxidant, 1-1.2 parts of lubricant.The application optimizes sheath layer material, solves the problems of existing double-armored submarine cable corrosion failure, short service life, unstable performance and other problems, meets the demand of long-term service reliability.

This invention relates to the field of composite material technology, and more particularly to a multilayer material with both microwave absorption and shock absorption functions, and its preparation method. The multilayer material, from the outside in, comprises a PMI foam absorbing layer, an ultra-high molecular weight polyethylene (UHMWPE) absorbing layer, a carbon fiber reflective layer, a ceramic layer, and an UHMWPE consumable layer. This invention utilizes the structural design of various material properties to design and fabricate a multilayer structure that combines microwave absorption and shock absorption functions. It exhibits excellent microwave absorption performance in the 2-18 GHz and 26.5-40 GHz bands, while also possessing a certain degree of shock absorption. This multilayer structure can be designed and adjusted according to different microwave absorption and shock absorption requirements, demonstrating significant practicality.

This invention relates to a composite fabric with electromagnetic shielding effect, its preparation, and its application. The composite fabric is made of a composite matrix material prepared mainly from ultra-high molecular weight polyethylene fiber and multi-walled carbon nanotubes, and the matrix material is sandwiched between two single-layer fabrics. The preparation method includes the following steps: a) cutting ultra-high molecular weight polyethylene fiber into short sections and mixing it with multi-walled carbon nanotubes, waterborne polyurethane, and dichloromethane; b) ultrasonically stirring the mixture obtained in step a until uniformly mixed; c) pouring the uniformly mixed mixture from step b into a mold, drying, degassing, and hot-pressing to obtain the composite matrix material; d) laying the obtained composite matrix material between the first and second single-layer fabrics, and hot-pressing to obtain the composite fabric with electromagnetic shielding effect. Compared with the prior art, this invention can enable bulletproof composite fabrics to possess excellent electromagnetic shielding performance while minimizing mechanical property loss.

The present disclosure provides catheters including non-fluorinated liners comprising ultra-high molecular weight polyethylene (UHMWPE), e.g., unexpanded UHMWPE with advantageous combinations of strength, flexibility, and size. The catheters may further include an optional reinforcement layer over the tube with either stainless steel or polymeric braids and a jacketing material to cover the braid and adhere to the liner, providing flexibility and lubricity to the outer diameter of the catheter assembly.

This invention discloses a method for reducing the fibrillation degree of para-aramid and ultra-high molecular weight polyethylene (UHMWPE). The method comprises: treating para-aramid (PPTA) and UHMWPE with plasma to introduce polar groups (-OH) onto their surfaces; subsequently immersing them in a silane coupling agent KH550 solution; and finally finishing the fibers with a 2,4-dichloro-6-(β-ethanesulfonyl sulfate)aniline-s-triazine fiber-locking agent instead of the traditional epoxy resin coating. This achieves the purpose of preventing the fibrillation of para-aramid and UHMWPE.

The present application relates to a kind of modification technical field of polyethylene fiber, specifically related to a kind of low-temperature environmental protection impregnation liquid, the modification method of ultra-high molecular weight polyethylene fiber and modified ultra-high molecular weight polyethylene fiber.The present application first uses vacuum continuous plasma treatment to replace traditional one bath activation liquid to activate UHMWPE fiber, overcome the problem that traditional one bath activation liquid is difficult to deposit on UHMWPE fiber.Then, using low-temperature unblocking blocked isocyanate, oligomeric polyol, crosslinking agent, but py latex and deionized water are compounded to prepare a kind of low-temperature environmental protection impregnation liquid.The blocked isocyanate in the low-temperature environmental protection impregnation liquid of the present application is unblocked and reacts with polyol and crosslinking agent, and forms resin network structure with urethane structure;Latex in low-temperature environmental protection impregnation liquid can be co-vulcanized with rubber, so as to establish good interface bonding between fiber and rubber.

This application relates to the field of polyethylene fiber technology, specifically disclosing an ultra-high molecular weight polyethylene (UHMWPE) fiber and its preparation process. The UHMWPE fiber comprises the following raw materials: UHMWPE powder, solvent, copolymer flame retardant, hydrotalcite, modified nano-silica, and antioxidant; the UHMWPE powder has a viscosity-average molecular weight of 2 million to 8 million; the copolymer flame retardant is obtained by free radical graft copolymerization of hyperbranched polyethylene and vinyl-containing DOPO derivatives. The UHMWPE fiber of this application exhibits excellent flame retardant properties, meeting the application requirements of polyethylene fibers in aerospace, rail transportation, and other fields with stringent fire safety requirements.

A clothing article is disclosed herein, comprising: at least one base knit region, each base knit region being formed of a base knit comprising an ultra-high molecular weight polyethylene (UHMWPE) fiber and at least one base stretch fiber being knit together in a plated configuration to form a jersey knit; and at least one reinforcing knit region, each reinforcing knit region being formed of a reinforcing knit comprising the UHMWPE fiber and the at least one base stretch fiber being knit together in a plated configuration to form a jersey knit. The reinforcing knit region further comprising a reinforcing stretch fiber being alternatingly knit with the jersey knit of the reinforcing knit in which within each given course of the jersey knit of the reinforcing knit, for every sequence of m + n consecutive loops of the course, the reinforcing stretch fiber is looped with m consecutive loops of the jersey knit of the reinforcing knit and n consecutive loops of the jersey knit of the reinforcing knit are free of looping with the reinforcing stretch fiber.

This invention belongs to the field of polymer materials technology, specifically relating to a production process for ultra-high molecular weight polyethylene (UHMWPE). By optimizing the catalyst system and polymerization process, this invention improves the performance and production stability of UHMWPE. A co-catalyst composed of alkylaluminum and organosiloxane modifiers, acting synergistically with external electron donors, significantly enhances catalyst activity and stereoselectivity, resulting in a more stable polymerization process, higher molecular weight and narrower molecular weight distribution, and significantly enhanced mechanical properties. The multi-stage polymerization process achieves precise control of the polymerization process through segmented temperature control, coupled with a dual-circulation heat removal system to effectively remove reaction heat, avoid localized overheating, and ensure a uniform and stable product structure. An integrated solvent recovery and molecular sieve drying system enables efficient recycling of hexane, controlling moisture content to ≤5ppm, preventing catalyst poisoning, ensuring stable continuous production, and overall improving the process's economy and reliability.

A tear-resistant chew toy for dogs and a method of making the toy. The toy includes a first and second similarly constructed panel assemblies, each of which includes a quilted fabric panel surrounded by a chew guard in the form of a webbing of ultra-high molecular weight polyethylene (UHMWPE) fabric. Overlapping portions of the chew guard are secured to the panel by a zig-zagging stitch pattern formed of UHMWPE thread. The individual stitches of the pattern extend at an acute angle to a radius of the fabric panel and generally parallel to the direction that dogs use their back molar teeth to gnaw on a chew guard. The panel assemblies are secured together by a stitch line also formed of UHMWPE thread to form an internal chamber in which a soft resilient stuffing and an audible squeaker are located.

The utility model discloses a kind of explosion-proof fan, including the casing of three-layer composite explosion-proof resin material and wind wheel, wherein outer layer carbon nanotube PEEK composite material effectively leads out static electricity, middle aluminium hydroxide flame-retardant layer prevents flame spread, inner layer ultra-high molecular weight polyethylene reduces friction spark risk.Electrostatic belt can effectively eliminate static electricity accumulation in transmission process, avoid static spark, improve explosion-proof safety.Fan is equipped with rotary electrostatic brush and ground copper wire to eliminate static electricity, and fire barrier is configured at air inlet to prevent flame propagation.Wind wheel blade is provided with tungsten-containing wear-resistant coating and zircon ceramic wear-resistant strip to avoid friction spark.Explosion-proof motor is built-in temperature sensor and vibration sensor, and stator winding adopts arc-resistant enameled wire.The utility model solves the problem of heavy weight and single protection of traditional fan through multiple explosion-proof design, with the characteristics of lightweight, superior explosion-proof performance, stable and reliable operation, especially suitable for flammable and explosive places such as petroleum and chemical industry.

This utility model relates to the field of pet mat technology and discloses a tear-resistant, anti-slip, and comfortable pet mat, comprising a surface layer, a bottom layer, and an edge strip. The surface layer is made of ultra-high molecular weight polyethylene knitted fabric, and the bottom layer is made of PVC foam material with a mesh backing. The edge strip wraps around the perimeter of the surface layer and the bottom layer and is fixed with stitching. It is also made of ultra-high molecular weight polyethylene knitted fabric. An adhesive layer is provided between the surface layer and the bottom layer. This utility model uses ultra-high molecular weight polyethylene knitted fabric to prevent tearing and puncture. The mat is anti-slip and not easily lifted or turned over. The edge of the edge strip is wide enough to effectively prevent damage from dogs. The entire mat combines tear resistance, anti-slip and waterproof properties, antibacterial and mildew resistance, and elastic comfort. Its simple and compact structure facilitates size customization and mass production, resulting in a high overall cost-effectiveness.

The application relates to the field of tunnel and underground engineering construction safety, in particular to an escape pipeline system for tunnel construction, which comprises an escape pipeline body, a self-propelled movable pedestrian bridge, an emergency refuge house and an escape device; the escape pipeline body is formed by connecting multiple super high molecular weight polyethylene pipes through flexible connecting pieces, the inlet of the escape pipeline body is arranged in a predetermined distance behind a tunnel face, and the outlet extends to a safe area where secondary lining is completed; the self-propelled movable pedestrian bridge is arranged above a tunnel inverted arch excavation area; the bridge body bottom of the self-propelled movable pedestrian bridge is provided with a continuous load-bearing truss, the escape pipeline body is suspended and supported inside the continuous load-bearing truss; the emergency refuge house is arranged at the inlet of the escape pipeline body; the escape device comprises an escape trolley which can slide in the escape pipeline body, a main traction rope and a back-pulling traction rope which is connected with the rear end of the escape trolley and covers the whole length of the pipeline.

This invention discloses a high-oxidation-resistance and high-weather-resistance battery separator and its preparation method, relating to the field of lithium battery separator technology. The technical solution is as follows: the high-oxidation-resistance and high-weather-resistance battery separator has a three-layer co-extruded structure, including an intermediate layer and surface layers on both sides of the intermediate layer; the intermediate layer is composed of maleic anhydride-grafted polyethylene, a silane crosslinking agent, an initiator, and white oil; the surface layers are composed of plasma-pretreated ultra-high molecular weight polyethylene, hydroxylated silica, antioxidants, ultraviolet absorbers, and white oil. This invention solves the problem that traditional wet-process polyethylene separators have poor weather resistance, inevitably leading to separator aging and brittleness when applied to scenarios requiring longer service life, such as energy storage cells, thus rendering the cells unusable.

This invention discloses a creep-resistant ultra-high molecular weight polyethylene (UHMWPE) composite material and its preparation method. The composite material is obtained by hot pressing of UHMWPE powder, a crosslinking agent, and modified calcium sulfate whiskers. The crosslinking agent is 1,3,5-triacryloylhexahydro-triazine. Before hot pressing, the crosslinking agent is uniformly coated on the surface of the UHMWPE particles. During hot pressing, a crosslinking reaction is initiated in the particle boundary region, forming an interfacial crosslinking network. The modified calcium sulfate whiskers are obtained by surface modification of calcium sulfate whiskers with a silane coupling agent. The interfacial crosslinking network and the whisker bridging structure together constitute a multi-scale synergistic reinforcement network. This invention is the first to introduce calcium sulfate whiskers into the TAF interfacial crosslinked UHMWPE system, achieving an organic integration of chemical crosslinking and physical reinforcement. Tests show that at 70°C... o C. Under a stress of 1 MPa for 30 minutes, the creep elongation of the composite material of the present invention is as low as 0.47%, which is 55.2% lower than that of unmodified UHMWPE. The Vicat softening point reaches 140.2℃ and the tensile strength reaches 36.5 MPa.

This invention belongs to the field of polymer materials technology, specifically relating to a low-gloss polypropylene composite material and its preparation method. The low-gloss polypropylene composite material is prepared from the following components in parts by weight: 53.4-89.3 parts polypropylene, 5-30 parts inorganic filler, 2-10 parts POE, 3-5 parts ultra-high molecular weight polyethylene, 0.2-0.6 parts nucleating agent, 0.2-0.4 parts antioxidant, and 0.3-0.6 parts processing aid. This invention improves the melt strength of the material by adding ultra-high molecular weight PE, and simultaneously increases the crystallization rate by adding alkyl carboxylate nucleating agents, thereby preventing the later-stage surface texture "collapse" and better replicating the texture depth and pattern, thus further reducing the product's gloss.

This invention relates to the field of lubricating composite materials technology, specifically to an ultra-high molecular weight polyethylene (UHMWPE)-based lubricating composite material and its preparation method. The UHMWPE-based lubricating composite material comprises, by weight, 82-88 parts UHMWPE, 8-12 parts carbon fiber, and 2-8 parts alkyltriethoxysilane-grafted modified whisker carbon nanotubes. This invention introduces alkyltriethoxysilane-grafted modified whisker carbon nanotubes into a carbon fiber and UHMWPE system. Utilizing their good compatibility with the UHMWPE matrix and their own ultra-high strength, a micro-nano multi-scale reinforcing network is constructed. This effectively solves the problems of poor interfacial bonding between carbon fiber and the matrix, easy pull-out under heavy loads, and high wear rate. The resulting composite material exhibits extremely low friction coefficient and wear rate under water lubrication conditions, while also possessing excellent mechanical properties.

This utility model discloses a hybrid gradient fiber composite bulletproof laminate, belonging to the technical field of composite material target plates. The hybrid gradient fiber composite bulletproof laminate comprises alternating layers of aramid fiber fabric and ultra-high molecular weight polyethylene fiber non-woven fabric; a water-based polyurethane layer with a three-dimensional cross-linked network structure is disposed between adjacent aramid fiber fabric layers and ultra-high molecular weight polyethylene fiber non-woven fabric layers. The interface bonding between the aramid fiber fabric and the ultra-high molecular weight polyethylene non-woven fabric in the hybrid gradient fiber composite bulletproof laminate of this utility model is reliable, exhibiting excellent energy absorption and blunt impact resistance, and providing good bulletproof performance.

The present invention relates to a hybrid fabric containing carbon fibers and UHMWPE fibers, and the UHMWPE fibers are twisted to improve its tensile strength and thus the impact resistance characteristics of the hybrid fabric. The hybrid fabric is preferably a woven fabric containing 50 to 70% by weight of carbon fibers and 30 to 50% by weight of UHMWPE fibers. This hybrid fabric can be used as a composite material for manufacturing impact-resistant articles such as protective shields for battery packs of electric vehicles.

The present application provides a battery cover, and an electronic device comprising the battery cover. The present application relates to the technical field of electronic products. The battery cover comprises a cover body and a puncture-resistant layer. The puncture-resistant layer is arranged on the side of the cover body close to a battery; or, the cover body comprises a resin matrix, and the puncture-resistant layer is arranged in the resin matrix, for example, the puncture-resistant layer is embedded in the resin matrix; and the specific puncture strength of the puncture-resistant layer is greater than or equal to 1.0 N / μm, and the puncture-resistant layer comprises biaxially oriented ultra-high molecular weight polyethylene. In the present application, the puncture-resistant layer has high specific puncture strength and low density, thereby achieving ultra-thin, lightweight and high-strength characteristics of the battery cover.

This invention relates to a method for preparing antistatic and antibacterial ultra-high molecular weight polyethylene (UHMWPE) fiber, comprising the following steps: S1, swelling UHMWPE, solvent, antioxidant, antistatic agent, and antibacterial agent to obtain a spinning solution; S2, extruding the spinning solution through a screw extruder to obtain gel fiber; S3, obtaining antistatic and antibacterial UHMWPE fiber through multi-stage drawing; wherein the swelling conditions include: a swelling temperature of 80-100℃, a swelling time of 1-4 hours; and a total draw ratio of 10-18 times for the multi-stage drawing. This preparation method effectively reduces the entanglement, coiling, and roller entanglement that previously occurred due to electrostatic effects, improving production efficiency, while imparting antibacterial and antistatic properties to the fiber, and exhibiting significant advantages in terms of breaking strength and modulus. This invention also relates to an antistatic and antibacterial UHMWPE fiber obtained by the above preparation method.

This invention provides a rolling bearing equipped with a cage that offers enhanced lubricity, wear resistance, and impact resistance at low temperatures, enabling a longer service life and making it particularly useful for liquefied gas pumps. [Solution] The rolling bearing comprises at least an inner ring, an outer ring, rolling elements, and a cage, the cage being made of a resin composition, and 50% or more, preferably 60-100% by mass, of the total resin component being ultra-high molecular weight polyethylene. Furthermore, the above rolling bearing is useful for liquefied gas pumps.

This invention discloses an outdoor fabric with abrasion resistance and its manufacturing method, relating to the field of fabric technology. The fabric comprises a dense abrasion-resistant layer, a high-efficiency cushioning layer, and a flexible substrate layer, layered sequentially from the outside to the inside and bonded together using a dot matrix adhesive structure. The dense abrasion-resistant layer is made of modified ultra-high molecular weight polyethylene fiber, activated by plasma and grafted with a nano-alumina coating, blended with polytetrafluoroethylene fiber and woven in a varied twill weave. The high-efficiency cushioning layer is a polyurethane elastomer with a three-dimensional mesh structure. The flexible substrate layer is an elastic base fabric interwoven with high-strength nylon filaments and spandex-covered yarns. The dense abrasion-resistant layer significantly improves surface scratch resistance and abrasion resistance. The high-efficiency cushioning layer contains gradient-distributed protective microcapsules, providing dual protection of energy absorption and localized reinforcement upon impact. The flexible substrate layer provides high-elasticity basic support, ensuring the fabric's overall flexibility and close fit.

The present application relates to the technical field of polyethylene materials, and particularly relates to a regenerated ultra-high molecular weight polyethylene fiber dry yarn and a preparation method thereof. The present application takes into account the processing fluidity and the mechanical skeleton integrity through the design of spherical lubrication-linear enhancement, realizes the long-term residence of the antioxidant, solves the technical bottleneck that the melt viscosity and the mechanical strength are difficult to take into account in the regeneration process of waste UHMWPE fibers, the antioxidant is easy to migrate and lose, and the weather resistance is poor, the obtained regenerated fiber has uniform diameter, stable whiteness, and the outdoor weather resistance is significantly improved, and can be widely applied to outdoor and protection fields such as mountaineering ropes, marine cables, cut-resistant gloves and the like.

The application discloses a kind of processing methods of ultra-high molecular weight polyethylene waste, it is related to polymer material recycling technical field.The method includes: sorting, ultrasonic cleaning and vacuum drying to the ultra-high molecular weight polyethylene fiber in the scrapped body armor panel;After constant temperature and humidity balance processing, cut into short fiber section;Send into oblique angle micro shear crusher and smash, and spray into low-temperature nitrogen stream instantaneous rapid cooling at discharge port;After air classification screening, coarse particle returns to circulating crushing;Qualified powder is carried out multi-stage pressurized annealing under high-purity nitrogen protection;Then surface grafting modification is carried out in acetone medium using maleic anhydride and azobisdimethylvaleronitrile;Finally, melt extrusion granulation after premixing with antioxidant.The whole process temperature of the application is controllable, and the molecular weight loss of recycled powder is small, and the crystallinity is high, so that high-value recycling can be realized.

This application discloses a thermoplastic elastomer and its preparation method. The raw materials include ultra-high molecular weight polyethylene (UHMWPE), SEBS rubber, and a compatibilizer. The UHMWPE has a molecular weight greater than 200,000, and the compatibilizer is a mixture of styrene-maleic anhydride-acrylonitrile terpolymer and maleic anhydride-grafted hydrogenated styrene-butadiene block copolymer. This application uses a formulation of UHMWPE, SEBS rubber, and a compatibilizer to ensure that the material has low hardness while satisfying self-lubricating and high wear resistance, thus expanding the application scenarios of thermoplastic elastomers.

This invention belongs to the field of ultra-high molecular weight polyethylene (UHMWPE) fiber preparation technology, and discloses an UHMWPE fiber, its drawing method, and a preparation apparatus. The drawing method includes: performing multi-stage continuous drawing on UHMWPE gel filaments prepared using a dry-wet method to obtain UHMWPE fibers; wherein the multi-stage continuous drawing includes pre-drawing and hot drawing; the initial feed speed of the UHMWPE gel filaments entering the pre-drawing stage is 1.5-4 m / min, and the total draw ratio is 2-15 times. The UHMWPE fibers prepared using the method of this invention have excellent mechanical properties, low coefficient of variation, adjustable fineness, and can improve production capacity.

The application discloses a kind of ultra-high molecular weight polyethylene fiber edge angle material high-value regranulation method, it is related to material recycling technical field.The application is sheared after ultra-high molecular weight polyethylene fiber edge angle material, with the degumming liquid containing sodium hydroxide, fatty alcohol polyoxyethylene ether, benzyl alcohol is carried out ultrasonic rinsing, drying, and degumming fiber is obtained;Then freeze and become brittle in liquid nitrogen, and are sheared into powder under the protection of nitrogen;Again, the powder is mixed with nano-silica modified by gamma-aminopropyl triethoxysilane, maleic anhydride graft polyethylene, forms coating layer, and obtains coated powder;Finally, the coated powder is sent into solid shear reactor, and is oriented and fused under the combined action of shear and pressure, and is extruded and cut into particles, i.e.The application realizes efficient degumming and low-temperature crushing of edge angle material, and significantly improves the mechanical properties and interfacial compatibility of particles by surface coating and solid shear regranulation, and obtains high-value regenerated ultra-high molecular weight polyethylene particles.

This utility model relates to a wear-resistant fiber roller with a coating layer, comprising a fiber roller body and a coating layer covering the outside of the fiber roller body. The fiber roller body is formed by multiple fiber bundles intertwined, each fiber bundle including a central fiber and an outer layer of fibers spirally wound around the central fiber. The coating layer, from the inside out, includes an adhesive layer, a wear-resistant layer, and a protective layer. The adhesive layer is made of a thermosetting resin material, the wear-resistant layer is woven from a mixture of ultra-high molecular weight polyethylene fibers and ceramic particles, and the protective layer is a transparent polyurethane elastomer film. This wear-resistant fiber roller with a coating layer, by providing a coating layer woven from a mixture of ultra-high molecular weight polyethylene fibers and ceramic particles on the outside of the fiber roller body, can effectively resist external friction and wear. Compared with traditional fiber rollers, its wear resistance is significantly improved, greatly extending the service life of the fiber roller.

The application discloses a kind of modified ultra-high molecular weight polyethylene fiber's bicomponent melt spinning preparation process, including modified ultra-high molecular weight polyethylene powder and obtains powder A, processing toner and obtains auxiliary B, mixed raw material is prepared core layer raw material C, core layer raw material C and powder A are sheared melt through bicomponent spinning assembly, finally air-cooling setting and hot roller traction, obtain modified high molecular weight polyethylene fiber finished product.The application realizes fiber skin layer covering fiber core layer by bicomponent spinning, with the safe harmless polyethylene melt skin layer, polyethylene melt added with functional material in core layer is wrapped, effectively overcome the finished product fiber powder after adding functional material in single component spinning process, possible damage equipment, adverse reaction caused after contacting with human body etc., eliminate many solution spinning limitations, widen the application range and scene of melt spinning.