950 results about "UHMWPE polyethylene" patented technology

The invention provides a high-strength, light and supercritical foaming fabric and a preparation method thereof, complete fibers used by the fabric comprise core layer fibers and a skin layer material, the outer side of the core layer fibers is uniformly coated with the skin layer material, and the skin layer material can be foamed; the core layer fiber is at least one of aramid fiber, polyarylate fiber, polyimide fiber, ultra-high molecular weight polyethylene fiber, polyester fiber and polyamide fiber; and the skin layer is made of thermoplastic elastomer resin. The preparation method comprises the following steps: uniformly coating the outer side of the core layer fiber with the skin layer material, and then carrying out supercritical foaming on the skin layer material. According to the invention, the contradictory technical requirements of the fabric for shoes on strength, light weight, comfort and the like are solved in a simple mode; the body strength of the fiber for the shoes can be kept, and the characteristics of light weight and air permeability of the foaming fabric are also achieved; the difficulty of direct foaming of the fabric / fiber for shoes is reduced, and the vamp fabric and the shoe article which are uniform in foaming, breathable, light in weight, high in strength and soft can be obtained.

The invention relates to the technical field of functional fabrics, and discloses a high-strength waterproof anti-ultraviolet fabric and a preparation method thereof.The fabric is obtained by dipping base cloth into a finishing agent, and the base cloth is obtained by blending and weaving polyester fibers and ultra-high molecular weight polyethylene fibers; the finishing agent is obtained by stirring and mixing deionized water, anti-ultraviolet modified titanium dioxide, a softening agent, an antistatic agent and polyurethane resin, the polyester fibers and the ultra-high molecular weight polyethylene fibers in the fabric have the characteristic of high strength, and nano titanium dioxide and an anti-ultraviolet absorbent in the anti-ultraviolet modified titanium dioxide have a synergistic effect, so that the fabric has excellent anti-ultraviolet performance; the polyurethane resin in the finishing agent and the silane-modified nano titanium dioxide have a synergistic effect, a uniform mechanical network is formed on the surface, the polyurethane resin and the silane-modified nano titanium dioxide complement each other, the dispersity is good, the compactness and the adhesiveness are good, and excellent durability and waterproof performance are achieved.

The invention discloses a forming method of an ultra-high molecular weight polyethylene strip, which comprises the following steps: step 1, mixing ultra-high molecular weight polyethylene resin and a low molecular weight solvent to prepare a uniform suspension, then extruding at high temperature, and cooling and shaping to obtain a gel film; step 2, carrying out single-axis high-temperature ultra-time hot stretching on the gel film; 3, extracting the stretched gel film to remove the low-molecular-weight solvent, and drying with hot air to obtain a dried film; 4, longitudinally cutting the dry film to form strips; and step 5, carrying out low-multiple uniaxial thermal stretching on the strip to remove pores so as to obtain the final ultra-high molecular weight polyethylene strip. The gel film is subjected to uniaxial hot stretching under the condition that a low-molecular-weight solvent is not removed, and the low-molecular-weight solvent is beneficial to promoting orientation of fibrous extended-chain crystals reserved in the gel film and formation of high-orientation crystals such as subsequent extended-chain crystals, so that the tensile mechanical property and other properties of a final strip are improved.

The invention belongs to the technical field of ultra-high molecular weight material manufacturing, and particularly relates to an ultra-high molecular weight polyethylene fiber recycling spinning method which comprises the following five steps: S1, sorting; s2, dehydrating and degumming; s3, cutting is conducted; s4, dissolving; and S5, spinning. According to the method, the ultra-high molecular weight polyethylene fiber with the physical property equal to that of the protofilament can be recycled, the ultra-high molecular weight polyethylene fiber with the use performance higher than that of the protofilament can be obtained, and the application range of the recycled ultra-high molecular weight polyethylene fiber is effectively widened; the purposes of efficient and environment-friendly regeneration and high-quality recycling of the waste ultra-high molecular weight polyethylene fibers are achieved.

A gravity type culture net cage comprises a floating frame device, a net cage bottom ring and a netting. A plurality of sinkers are fixedly connected to the net cage bottom ring; the netting is mounted between the lower edge of the annular floating frame and the upper edge of the net cage bottom ring in a covering manner to form a net cage side wall, and is mounted on the inner side of a ring body of the net cage bottom ring in a covering manner to form a net cage bottom wall; the netting is composed of composite braided wires, and the composite braided wires comprise ultra-high molecular weight polyethylene core wires and polyformaldehyde rubber-covered wires; and the polyformaldehyde rubber-covered wire is wound and wrapped on the outer side of the ultra-high molecular weight polyethylene core wire. According to the invention, the sinker counterweight can be reduced so as to reduce the construction difficulty in the sea, and the volume and load resistance strength of the culture net cage and the wear resistance of the netting are comprehensively improved.

The invention belongs to the field of macromolecules, and discloses a water-lubricated composite material, a preparation method and a bearing.The water-lubricated composite material is characterized in that composite paraffin microcapsules with micro-protrusion structures are prepared from raw materials such as nano-cellulose whiskers, sodium chloride, paraffin and melamine, and the composite paraffin microcapsules and carbon fibers are jointly added into ultra-high molecular weight polyethylene, so that the water-lubricated composite material is prepared. The water-lubricated composite material is prepared from the composite paraffin microcapsules, the composite paraffin microcapsules with the micro-bulge structures can be uniformly distributed in the water-lubricated composite material and slowly release a lubricant after being abraded, and in addition, the composite paraffin microcapsules are matched with the carbon fibers added into the composite paraffin microcapsules, so that the water-lubricated composite material can be prepared by the composite paraffin microcapsules under the support of the carbon fibers. The excellent performance is brought to the water-lubricated composite material, so that the water-lubricated composite material provided by the invention has low friction coefficient and wear resistance.

The invention belongs to the technical field of modification of ultra-high molecular weight polyethylene, and particularly relates to special resin for a modified ultra-high molecular weight polyethylene lining oil pipe and a preparation method of the special resin. The special resin for the modified ultra-high molecular weight polyethylene lining oil pipe is prepared from the following raw materials in parts by mass: 65 to 80 parts of ultra-high molecular weight polyethylene, 5 to 10 parts of high-density polyethylene, 8 to 12 parts of modified polyaryletherketone, 4 to 7 parts of modified hyperbranched polyester, 0.3 to 2 parts of silicone master batch and 0.1 to 0.5 part of antioxidant. The lining oil pipe prepared from the special resin for the modified ultra-high molecular weight polyethylene lining oil pipe has excellent wear resistance and high temperature resistance, and also has good mechanical properties such as tensile strength and impact strength.

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.

The invention relates to the related technical field of warm-keeping fabrics, in particular to a hollow warm-keeping yarn fabric which is formed by weaving hollow fibers in a staggered plaid structure, the staggered plaid structure is formed by interweaving warp yarns and weft yarns in a spiral winding mode, and micro air chambers are formed at the interweaving points of the warp yarns and the weft yarns. The hollow fiber comprises a core layer and a sheath layer, the core layer is of a plum blossom petal-shaped multi-cavity structure formed by ultra-high molecular weight polyethylene, cavities are separated through radial connecting bridges, and the sheath layer sequentially comprises a heat conduction enhancing layer, an infrared reflecting layer and a dynamic temperature adjusting layer from inside to outside. Dynamic heat and humidity collaborative management, intelligent temperature response, radiation heat management and structural stability are effectively improved, the heat retention property and moisture permeability of the fabric are improved, self-adaptive adjustment can be achieved according to the body temperature of the human body, the heat radiation transmission efficiency is enhanced, the super-hydrophobic interface modification and covalent bonding technology is adopted, and the thermal radiation performance of the fabric is improved. And the functional layer can still keep high bonding strength after being washed repeatedly.

The invention discloses ultra-high molecular weight polyethylene pipe production equipment, and particularly relates to the technical field of polymer plastic processing, the ultra-high molecular weight polyethylene pipe production equipment comprises an equipment box, and an extrusion heating mechanism is arranged at the top of the equipment box; the extrusion heating mechanism comprises a driving device which is fixedly installed at the top of the equipment box, the output end of the driving device is fixedly connected with a transmission shaft, one end of the transmission shaft is fixedly provided with a gearbox, and one side of the gearbox is fixedly connected with a fixing pipe. The raw materials are efficiently pretreated, it is ensured that raw material particles are uniform and fully mixed, a good foundation is laid for the subsequent plasticizing and extruding process, the quality and performance stability of the pipe are improved, the temperature requirements of the ultra-high molecular weight polyethylene pipe in different production stages can be met, the molecular structure of the pipe is more regular, and the production efficiency is improved. Therefore, the strength, toughness and corrosion resistance of the pipe are enhanced, and reliable technical support is provided for large-scale production of the ultra-high molecular weight polyethylene pipe.

The present disclosure is direct to a soft body armor assembly that comprises a first subpanel and a second subpanel. The first subpanel may have a first portion and a second portion. The first portion may have a first plurality of ultra-high molecular weight polyethylene fiber sheets. Each sheet of the first plurality may have two single layers of unidirectional sheets cross plied at 90 degrees to one another. The second portion may have a second plurality of ultra-high molecular weight polyethylene fiber sheets. The second subpanel may comprise a third portion and a fourth portion. The third portion may have a third plurality of ultra-high molecular weight polyethylene fiber sheets. The fourth portion may have one or more composite sheets.

The invention provides an ultra-high molecular weight polyethylene fiber resin composite material interface regulation composition which comprises the following components in parts by weight: 100 parts of ultra-high molecular weight polyethylene fiber, 12 parts of polyethylene, 0.6 part of a compatilizer, 0.03 part of an initiator, 2.5 parts of gallic acid, 1 part of tetraethylenepentamine and 5 parts of nano silicon dioxide. The compatilizer is used for melt grafting with polyethylene, and the initiator is used for initiating melt grafting of the compatilizer and polyethylene. The invention also provides a method for carrying out interface regulation and control by adopting the interface regulation and control composition and an ultra-high molecular weight polyethylene fiber resin composite material prepared by the method. The ultra-high molecular weight polyethylene fiber resin composite material obtained by carrying out interface regulation and control treatment on the ultra-high molecular weight polyethylene fiber resin composite material interface regulation and control composition has a good interface state, excellent mechanical properties and good impact resistance.

The invention discloses a preparation method of an ultra-high molecular weight polyethylene biaxially oriented film, and relates to the field of high polymer materials, and the preparation method comprises the following steps: step 1, mixing ultra-high molecular weight polyethylene and polyethylene wax to obtain a composition; 2, melting and plasticizing the obtained composition, and extruding to form a thin-wall tubular film after melting and plasticizing; 3, the thin-wall tubular film is subjected to blowing, traction and rolling, and the final ultra-high molecular weight polyethylene film is obtained. The melt flowability of the ultra-high molecular weight polyethylene is improved by utilizing the polyethylene wax, and the polyethylene wax can participate in crystallization of the ultra-high molecular weight polyethylene by controlling the blow molding process, so that the mechanical property of the ultra-high molecular weight polyethylene biaxially oriented film is improved.

The invention relates to the field of biomedical materials, and discloses a preparation method and application of an antibacterial and anti-adhesion ultra-high molecular weight polyethylene fiber. According to the preparation method disclosed by the invention, the aminoglycoside antibiotics and the polysulfobetaine are stably modified on the surface of the UHMWPE fiber by utilizing the oxidation self-polymerization reaction of the polyphenol, and the UHMWPE fiber can be endowed with excellent antibacterial property and adhesion resistance by virtue of the broad-spectrum antibacterial property of the aminoglycoside antibiotics and the strong hydration effect of the polysulfobetaine; the application in the fields of antibacterial fabrics, biological materials and the like is facilitated.

The invention belongs to the technical field of fabrics, and particularly relates to a modified ultra-high molecular weight polyethylene stab-resistant fiber and a preparation method thereof. The preparation method comprises the following steps: 1) adding mesoporous WO3 and surface hydroxylated BN into ethanol for ultrasonic dispersion, adding water and stirring to obtain WO3-BN; 2) mixing the WO3-BN with the PTFE suspension, adding a silane coupling agent, and stirring to obtain a modified nano composite material; and 3) putting ultra-high molecular weight polyethylene, the modified nano composite material and an antioxidant into a double-screw extruder for melting, mixing, conveying and shearing, carrying out melt spinning extrusion and water bath cooling to obtain nascent fibers, and carrying out three-stage hot stretching and winding to obtain the modified ultra-high molecular weight polyethylene stab-resistant fibers. The prepared modified ultra-high molecular weight polyethylene puncture-proof fiber has excellent tensile strength, tensile modulus, cutting resistance and puncture-proof performance.

The invention discloses a protective fabric with tear resistance and a preparation process thereof. According to the invention, through the three-layer structural design of the inner comfortable layer, the middle protective layer and the outer protective layer, performance optimization of the fabric in multiple aspects is realized. The inner comfortable layer is made of the polyester fibers and the spandex fibers, and the moisture-conducting and sweat-discharging auxiliaries are added, so that the softness and moisture-permeable and sweat-discharging capabilities of the contact surface of the fabric and the skin are ensured, and the comfort of a wearer is improved. The middle protective layer is combined with aramid fibers, ultra-high molecular weight polyethylene fibers, carbon fibers and a thermoplastic polyurethane film, and high-strength, impact-resistant and puncture-resistant protective performance is formed. The outer protective layer utilizes the excellent characteristics of aramid fibers and polyimide fibers, and a fireproof agent and a wear-resistant agent are added, so that the wear-resistant and fireproof capabilities of the fabric are enhanced. Due to the multi-layer composite structure, the fabric is light and convenient, has high-strength tear resistance, and meets the high-standard requirement for personal protection equipment in a complex environment.

The invention belongs to the technical field of ultra-high molecular weight polyethylene, and particularly relates to a high-temperature-resistant ultra-high molecular weight polyethylene fiber and a preparation method thereof.The preparation method comprises the following steps that an aluminate coupling agent, a processing aid and halloysite nanotubes are mixed and put into a double-screw extruder to be subjected to extrusion granulation, and a binary blended composite material is obtained; mixing the binary blended composite material with polycarbonate particles, then adding a processing aid, a dispersing agent, graphene and ultra-high molecular weight polyethylene, uniformly mixing, putting into a twin-screw extruder, extruding, and cooling to obtain the high-temperature-resistant ultra-high molecular weight polyethylene fiber, the thermal deformation temperature of the high-temperature-resistant ultra-high molecular weight polyethylene fiber reaches 131 DEG C, the high-temperature-resistant ultra-high molecular weight polyethylene fiber shows good high temperature resistance, the thermal decomposition finishing temperature is 540.8 DEG C, good thermal stability is shown, and the application field of the ultra-high molecular weight polyethylene fiber is expanded.

The invention provides an ultra-high molecular weight polyethylene fiber woven reinforced polyethylene / polyvinyl chloride composite pipe and a preparation method thereof. The composite pipe is of a five-layer composite structure and comprises a high-density polyethylene core pipe on the inner layer, an ultra-high molecular weight polyethylene fiber woven reinforcement layer on the middle layer, a polyvinyl chloride coated pipe on the outer layer, a first adhesive layer and moisture curing reaction type polyurethane hot melt adhesive on the second adhesive layer. The preparation method of the composite pipe comprises the steps of inner layer core pipe preparation, polyurethane hot melt adhesive coating, fiber woven reinforcement layer forming, secondary polyurethane hot melt adhesive coating, outer layer wrapping and the like. The fiber performance is protected by adopting a low-temperature process, and efficient bonding is realized; the ultra-high molecular weight polyethylene fibers are alternately woven and wound to form the grid reinforcing layer, so that the pipe is endowed with high strength and impact resistance. The problems that a traditional composite pipe is prone to layering between layers, insufficient in pressure bearing capacity, complex in construction connection and the like are solved, and the composite pipe has the advantages of being high in strength, resistant to corrosion, easy to connect and the like.

The invention discloses an ultra-strong anti-cutting graphene ultra-high molecular weight polyethylene fiber and a preparation method thereof. The method comprises the following steps: S1, dissolving modified graphene oxide powder, carbon fiber powder and a dispersant in a solvent to obtain a functional filler dispersion liquid; s2, uniformly dispersing ultra-high molecular weight polyethylene resin in a solvent in a blending manner to form a uniform resin dispersion liquid; s3, adding the functional filler dispersion liquid into the resin dispersion liquid, stirring and heating to obtain a spinning solution, swelling and extruding the spinning solution to form a molten state, and cooling to form gel filaments; and extracting and drafting the gel silk to obtain the gel silk. Wherein the weight ratio of the modified graphene oxide powder to the carbon fiber powder to the dispersing agent to the ultra-high molecular weight polyethylene resin is (1-3): (40-55): (0.4-0.8): 100.

The invention discloses a hybrid gradient fiber composite bulletproof laminated plate and a preparation method thereof, and belongs to the technical field of composite target plates. The preparation method comprises the following steps: coating the surface of each aramid fiber cloth laminated layer with waterborne polyurethane, and sequentially performing drying and tailoring forming to obtain a plurality of tailored and formed aramid fiber cloth composite layers; respectively cutting and forming the plurality of ultra-high molecular weight polyethylene fiber non-woven fabric laminated layers; and sequentially carrying out staggered stacking, wrapping, mold embedding and hot press molding on the waterborne polyurethane layers in the multiple tailored and molded ultra-high molecular weight polyethylene fiber non-woven fabric laminated layers and the multiple tailored and molded aramid fiber cloth composite layers, so as to obtain the hybrid gradient fiber composite bulletproof laminated plate. The interface bonding between the aramid fiber cloth and the ultra-high molecular weight polyethylene non-woven cloth in the hybrid gradient fiber composite bulletproof laminated plate is firm, and the hybrid gradient fiber composite bulletproof laminated plate has good energy absorption and blunt impact resistance effects and good bulletproof performance.

The invention discloses a method for producing multimodal polyethylene through series connection of multiple reactors, and belongs to the field of olefin polymerization. The low-molecular-weight or medium-molecular-weight ethylene polymer is produced through polymerization in the first reactor, the obtained product enters the intermediate treatment unit to remove hydrogen, and then part of the product is shunted to enter the second reactor to be mixed with the ultra-high-molecular-weight ethylene polymer produced through ethylene polymerization in the second reactor; all polymers of the second reactor are returned to the intermediate treatment unit, and the rest products after hydrogen removal enter a third reactor and are mixed with high-molecular-weight ethylene polymers generated by copolymerization of ethylene and comonomers in the third reactor to generate multimodal polyethylene. The multimodal polyethylene produced by the method is wide in molecular weight distribution, and the molecular weight of ultra-high molecular weight polyethylene is flexible to regulate and control. According to the invention, material circulation between the third reactor and the second reactor is adopted, molecular chain-level mixing among the components is achieved, the compatibility is good, and the mechanical property is more excellent.

A method for forming a high density UHMWPE film from a paste processed ultra-high molecular weight polyethylene (UHMWPE) polymer and a highly crystalline ultra-high molecular weight polyethylene polymer is provided. The UHMWPE film described herein can be produced by 1) compressing a dry porous UHMWPE tape and then stretching it above the melting temperature of the UHMWPE polymer, 2) expanding the dry porous UHMWPE tape above the melting point of the UHMWPE polymer without compression, or 3) expanding the dry porous UHMWPE tape below the melting point of the UHMWPE polymer to form a porous film, and then compressing the porous film above the melting point of the UHMWPE polymer to form a high density film. The high density film can be further biaxially stretched to enhance the properties of the high density film.

The invention relates to the field of polyethylene fibers, in particular to a cutting-resistant polyethylene fiber. By selecting the combination of the ultra-high molecular weight polyethylene powder, the carbon fibers and the nano silicon dioxide and selecting the proportion, the cutting resistance of the product can be well ensured, and the carbon fibers can remarkably improve the tensile strength, bending strength and rigidity of the material and reduce the thermal expansion coefficient of the product at the same time; and the nano silicon dioxide can improve the surface smoothness, hardness and wear resistance of the product and enhance the overall performance of the material. In addition, the additive and assistant system disclosed by the invention is also obtained through repeated experiments, and the cutting resistance of the product is not influenced.

The invention belongs to the field of novel polyamide composite fiber materials, and particularly discloses a high-toughness polyamide fiber composite material and a preparation method thereof. The composite material is prepared from the following raw materials in parts by weight: 55-75 parts of long-chain polyamide PA610 resin, 10-25 parts of ultra-high molecular weight polyethylene fiber, 8-18 parts of polyether block amide elastomer, 1.5-4 parts of a compound nucleating agent, 0.8-2 parts of a titanate coupling agent and 0.3-1 part of a composite antioxidant. The preparation method is characterized by comprising the following steps: firstly, carrying out surface pretreatment on the ultra-high molecular weight polyethylene fiber by adopting a low-temperature plasma technology so as to improve the interfacial compatibility of the ultra-high molecular weight polyethylene fiber and a resin matrix; and then carrying out melt blending granulation on the pretreated fiber and other raw materials through a twin-screw extruder, wherein the fiber is added from a side feeding port to avoid excessive shearing and breaking. The obtained product has ultrahigh impact toughness, excellent rigidity, excellent low-temperature toughness and heat resistance, and is especially suitable for the fields of manufacturing automobile parts, sports protection equipment and the like with extremely high requirements on toughness and durability.

The utility model discloses an ultra-high molecular weight polyethylene pipe connection and trimming device, comprising a base, a tool, a motor and a grinding disc, wherein the base is provided with a first movable groove, and a first threaded rod is arranged in the first movable groove, the first threaded rod penetrates a left clamp block and a right clamp block, the base is provided with a second movable groove on the right side of the first movable groove, and a second threaded rod is arranged in the second movable groove, the second threaded rod penetrates a moving block, and a rotating block is arranged on the top of the moving block, a fixed frame is arranged on the top of the rotating block, and a third threaded rod is arranged on the top of the fixed frame, and a clamp is connected to the bottom of the third threaded rod. The ultra-high molecular weight polyethylene pipe connection and trimming device is provided with a rotating block and a fixed frame, and when it is necessary to grind out an oblique interface, the rotating block is rotated, and the polyethylene pipe is cut by the tool on the top of the rotating block, and then the second threaded rod is rotated to make the grinding disc close to the pipe mouth and grind it, so as to grind out an oblique pipe mouth.

The invention relates to the field of cable descending rope strength testing equipment, in particular to an ultrahigh molecular weight polyethylene fiber high-altitude cable descending rope strength detection device which comprises a plurality of strength testing assemblies, a climate simulation assembly, an environment simulation assembly and a stress simulation assembly. The strength testing assembly is used for testing the strength of the rope descending rope; the climate simulation assembly is used for simulating climate factors of the rope descending rope in the testing process; the environment simulation assembly is used for simulating environment factors of the rope descending rope in the testing process; the stress simulation assembly is used for simulating stress factors of the cable descending rope in the testing process, the conditions of stress, abrasion, lateral stress direction deflection, rope body deflection and the like of the cable descending rope in the actual falling process can be simulated, and the testing scene is made to be highly attached to the actual use scene of high-altitude mountain cable descending; therefore, more real and reliable strength performance data can be obtained.

The invention belongs to the technical field of high polymer material processing, and particularly relates to a melt extrusion molding method of an ultra-high molecular weight polyethylene wide sheet. Aiming at the technical bottlenecks of poor melt flowability, extrusion fracture and the like caused by molecular chain entanglement of UHMWPE, continuous and stable extrusion of UHMWPE wide sheets is realized by compounding a specific flow modifier and combining a stepped precise temperature control strategy and a forced symmetric cooling process. According to the method, the melt fracture phenomenon is eliminated, the intrinsic performance such as high wear resistance and low temperature resistance of UHMWPE is completely reserved, the efficiency and size limitation of a traditional mold pressing process is broken through, and a large-scale production solution of high-performance sheets is provided for the high-end fields such as food machinery and medical implants.

The invention relates to the technical field of plates, in particular to a light-weight impact-resistant carbon fiber composite large plate and a preparation method and application thereof, and the composite large plate comprises a surface carbon fiber rigid composite layer, an internal toughness impact-resistant layer and a light-weight core layer which are sequentially arranged from outside to inside; the surface carbon fiber rigid composite layer is made of epoxy resin carbon fiber cloth prepreg; the internal tough impact-resistant layer is made of epoxy resin ultra-high molecular weight polyethylene prepreg; the lightweight core layer is formed by taking a three-dimensional woven carbon fiber fabric as a framework and adding a filling material in gaps of the three-dimensional woven carbon fiber fabric after reinforcing ribs made of a plurality of carbon fiber hollow square tubes are distributed in the three-dimensional woven carbon fiber fabric; the high-strength and high-modulus carbon fiber composite layer, the ultra-high molecular weight polyethylene composite layer and the light-weight core layer on the surface layer are integrally solidified, so that the technical problems that in the prior art, a foam sandwich plate is insufficient in rigidity and poor in mechanical property, impact resistance and layering resistance are solved.

The invention belongs to the technical field of textile material processing, and particularly discloses a preparation method of high-strength low-shrinkage composite yarn for spinning. A preparation method of a high-strength low-shrinkage composite yarn for spinning comprises the following steps: (1) respectively drying ultra-high molecular weight polyethylene and PET polyester, adding maleic anhydride grafted PE, a treated metal organic framework material, boron carbide nanoparticles, cellulose acetate and a silane coupling agent KH550, uniformly mixing, and carrying out melt extrusion to obtain nascent fibers; (2) performing first-stage pre-drafting, second-stage high-temperature tension field drafting and third-stage low-temperature relaxation treatment on the nascent fiber to obtain treated fiber; and (3) dipping the treated fiber in an ethanol solution containing nano SiO, and performing infrared radiation curing to obtain the high-strength low-shrinkage composite yarn for spinning. The composite yarn has good mechanical strength, wear resistance and low contractibility, and the yarn has wide application due to the high breaking strength.

The invention relates to the technical field of polymer fibers, and in particular to an impact-resistant ultra-high molecular weight polyethylene fiber and a preparation method thereof. The invention introduces maleic anhydride for graft modification, and benzoyl peroxide as an initiator can promote the formation of free radicals, so that active sites are generated on the ultra-high molecular weight polyethylene chain. Maleic anhydride as a polar monomer can react with the active sites to form a graft chain, thereby introducing polar groups to enhance the interaction force between molecules, and improving the toughness and processing fluidity of the material to a certain extent. In addition, white oil, decalin and xylene as solvents are conducive to the expansion and dispersion of the ultra-high molecular weight polyethylene, so that the modification process is more uniform and efficient. The toughening polymer component in the invention is synthesized by chemical reaction to obtain a cross-linked network structure with multiple functional groups and a high molecular weight, so that the external impact force can be effectively absorbed and dispersed, and the impact resistance of the material can be significantly improved.