341 results about "UHMWPE polyethylene" patented technology

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.

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 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 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 discloses a PBO fiber reinforced bulletproof helmet and a preparation method thereof. The PBO fiber reinforced bulletproof helmet is provided with a shell, the shell comprises a resin matrix and reinforcing material layers, the reinforcing material layers are distributed in the resin matrix, and the adjacent reinforcing material layers are fixedly combined through the resin matrix; the reinforcing material layer comprises PBO fibers. According to the bulletproof helmet, the PBO fiber is adopted as a reinforcement body to prepare the bulletproof helmet for the first time, and the problems that an existing aramid fiber helmet is poor in bulletproof performance and an ultra-high molecular weight polyethylene helmet is poor in stability are solved; according to the preparation method provided by the invention, the hot pressing process is optimized, so that the problem of deviation caused by smooth surface of the PBO fiber and poor bonding property with the resin is avoided, and the PBO fiber reinforced bulletproof helmet with stable shape and excellent performance is prepared.

The invention belongs to the technical field of high polymer material recovery, and particularly relates to an ultra-high molecular weight polyethylene fiber leftover green degumming agent and a degumming method. The green adhesive remover for the ultra-high molecular weight polyethylene fiber leftovers comprises the following components: 60-80 parts of biodegradable ionic liquid, 5-10 parts of catalyst organic alkali and 10-35 parts of deionized water. The degumming agent is green, environment-friendly and pollution-free, and can be repeatedly used; degumming conditions are mild, operation is simple, and the degumming rate is gt; the gel content of the recovered fibers is lower than 2wt%, and high-value recovery of the ultra-high molecular weight polyethylene fibers is facilitated.

The invention discloses a light warm-keeping high-strength fabric and a preparation method thereof, and relates to the technical field of fabric manufacturing. The light warm-keeping high-strength fabric is of a plain grid structure formed by interweaving warp yarn and weft yarn, and the warp yarn and the weft yarn are both obtained by compounding chinlon hollow yarn and ultra-high molecular weight polyethylene yarn. The preparation method of the light warm-keeping high-strength fabric comprises the following steps: performing sectional warping arrangement on the nylon hollow yarns and the ultra-high molecular weight polyethylene yarns, finishing into a warp beam, performing drafting and denting according to a tissue structure, selecting a heavy loom for weaving, and performing interweaving, deoiling, washing, dyeing and shaping according to a plain weave mode to obtain the light warm-keeping high-strength fabric.

The invention belongs to the technical field of pipes, and particularly relates to an ultra-high molecular weight polyethylene pipe super-lubrication extrusion aid and a preparation method thereof. The extrusion aid consists of the following components in parts by mass: 5-11 parts of an internal lubricant, 4-10 parts of an external lubricant, 3-5 parts of a plasticizer, 12-25 parts of a filler and 0.5-2 parts of an antioxidant, the external lubricant is prepared by mixing organic silicon modified epoxy oleic acid triglyceride, erucic acid, zinc stearate and stearic acid according to the mass ratio of 100: (20-40): (10-25): (5-15). The ultra-lubricating extrusion aid for the ultra-high molecular weight polyethylene pipe prepared by the invention realizes stable extrusion of ultra-high molecular weight polyethylene under the conditions of low energy consumption, high yield and high quality.

The invention relates to an ultra-high molecular weight polyethylene / carbon nanotube electromagnetic shielding material injection molding method, and relates to the technical field of conductive polymer composites.The method comprises the following steps that S1, sufficient UHMWPE, linear polyethylene wax and CNT are taken to be dried, and dried UHMWPE, dried linear polyethylene wax and dried CNT are obtained; s2, mechanically blending the dried UHMWPE, the dried linear polyethylene wax and the dried CNT to obtain composite particles; and S3, carrying out injection molding on the composite particles to obtain the ultrahigh molecular weight polyethylene / carbon nanotube electromagnetic shielding material. The ultra-high molecular weight polyethylene / carbon nanotube electromagnetic shielding material is prepared in an injection molding mode, the production period is greatly shortened, the production efficiency is greatly improved, and the method is suitable for industrial production; and a workpiece with a complex geometric structure can be prepared through injection molding, and the application range of the UHMWPE / CNT electromagnetic shielding material can be greatly expanded.

The invention provides a nylon composite material as well as a preparation method and application thereof, and belongs to the technical field of nylon composite materials. The nylon composite material comprises the following raw materials in parts by mass: 35-75.5 parts of nylon resin; 20 to 40 parts of glass fiber; 2-15 parts of a wear-resistant agent; 1 to 5 parts of silicone; 1-5 parts of a compatilizer; 0.5 to 1 part of an antioxidant; 0.5 to 1.5 parts of a lubricant; 0.5 to 1.5 parts of a coloring agent; the wear-resistant agent comprises more than one of ultra-high molecular weight polyethylene, a hyperbranched polymer, polytetrafluoroethylene and silicone oil. The nylon composite material is prepared by compounding the nylon resin, the glass fiber, the wear-resistant agent, the silicone, the compatilizer, the antioxidant, the lubricant and the coloring agent, so that the wear resistance and the melt strength of the nylon composite material are remarkably improved, meanwhile, the nylon composite material has excellent machinability and mechanical properties, the machinability and the dimensional precision of wear-resistant products can be improved, the service life of the wear-resistant products can be prolonged, and the processing efficiency can be improved.

This article is a transfer aid made substantially of hard plastic (e.g., ultra-high molecular weight polyethylene) and used to transfer a person (patient) from a bed or the like to a wheelchair (or seat), or vice versa. The transfer aid (10) comprises a floor plate body (11) having a longitudinal length of approximately 400 to 1000 mm and a thickness of approximately 4 to 10 mm. A buttocks interference prevention part (12) is provided in the center of one side of the floor plate body (11), and under-buttocks insertion parts (13) are provided on both ends. The buttocks interference prevention part (12) has a through-hole and a handle (12a), and is configured to be bendable via a recess (12b) between it and the floor plate body (11). In addition, notches (14) are formed between the main body (11) of the floor plate and both sides of the buttock interference prevention section (12) to the under-buttock insertion section (13), making it easier for the caregiver to hold the item and insert it under the buttocks of the person being transferred. Furthermore, hook holes (15) are provided on both ends of the main body (11) at positions on the center of gravity, improving convenience for storage and portability. A non-slip plate (16) can be provided on the back of the main body (11), thereby increasing stability during use. Reference rear view 1, showing the state in use, shows the main body (11) with two non-slip plates (16) attached, while reference rear view 2, showing the state in use, shows the main body (11) with one non-slip plate (16) attached. The reference perspective view and the reference front view show the buttock interference prevention portion (12) folded and flat with the floor plate body (11).

Process and products for producing a solution-spun multifilament yarn containing n filaments are provided, wherein an ultra-high molecular weight polyethylene (UHMWPE) solution containing UHMWPE polymer and a solvent for the UHMWPE polymer are spun through n spin-holes of a spin plate and drawn before, during or after removal of the solvent to thereby obtain the multifilament yarn containing n filaments, the yarn having a tenacity (Ten) as expressed in cN / dtex of Ten(cN / dtex)=f×n−0.05×dpf−0.15, wherein Ten is at least 39 cN / dtex, n is at least 25, f is a factor of at least 62.0 and dpf is the dtex per filament.

The invention belongs to the technical field of hoisting equipment, particularly adapts to high-altitude and low-altitude multi-scene hoisting operation and high-altitude safety protection, and particularly discloses an ultra-high molecular weight polyethylene fiber rope self-locking device which comprises a shell, a fixing handle is arranged on the shell, and a main ratchet wheel rotating disc is rotationally installed in the shell; a first pawl is arranged in the shell and matched with the main ratchet wheel rotating disc, and an auxiliary ratchet wheel rotating disc is further arranged in the shell. Through cooperation of the main ratchet wheel rotating disc and the auxiliary ratchet wheel rotating disc, the fiber rope forms a curved track, the number of locking stress points of the fiber rope is increased to two, and the local stress load of the fiber rope is dispersed; the problems that the ultra-high molecular weight polyethylene fiber rope is locally prone to friction damage and the structure is weakened during high-low-altitude operation are solved, meanwhile, the locking failure risk caused by extreme dynamic impact is reduced, and the complex and harsh safety protection requirement of the high-low-altitude operation can be stably met.

The application provides a kind of super high molecular weight polyethylene filament bundle / spandex double-sided tuck structure cut-resistant knitted sportswear and a preparation method thereof.The preparation method comprises feeding the first high-performance fiber filament bundle and spandex bare wire after twisting or doubling into a weaving device to form a front organization and a back organization;And feed the second high-performance fiber filament bundle to form a tuck structure;Control the weaving device to weave according to the preset knitting method to obtain a fabric with a double-sided tuck structure, and obtain a cut-resistant knitted sportswear after setting treatment.By the above-mentioned mode, the application can utilize the synergistic effect between the fiber material, the feeding mode and the fabric organization structure, so that the obtained cut-resistant knitted sportswear has good deformation resilience, softness, surface smoothness and other wearability while achieving the European standard EN388:2016 level three standard in cut resistance, effectively balancing the cut resistance and wearability to meet the application requirements of short track speed skating uniforms.

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.

The invention discloses a preparation method of ultra-high molecular weight polyethylene fiber, fiber and spinning equipment, and the preparation method comprises the following steps: (1) mixing ultra-high molecular weight polyethylene powder with a solvent, uniformly swelling, and feeding into a twin-screw extruder for fully dissolving to obtain a spinning solution; spraying the spinning solution through a spinneret plate, drafting in an air gap, and cooling in a cooling bath to obtain gel silk; (2) carrying out shrinkage balance on the gel silk; then carrying out pre-extraction and pre-drying to obtain gel filaments with low solvent concentration, and storing the gel filaments in a filament containing barrel for later use; and (3) sequentially carrying out multi-stage extraction, drying, multi-stage drafting and winding on the jelly silk with low solvent concentration to obtain the ultra-high molecular weight polyethylene fiber. Through the steps of shrinkage balance, pre-extraction and drying treatment on the gel silk, adverse effects caused by solvent precipitation and gel silk shrinkage in the standing process of the gel silk can be reduced, the fiber fineness can be controlled to be stable and uniform, the production process is short, the occupied area of equipment is small, and the investment is low.

The invention discloses a waterproof fishing line and a preparation method thereof. The preparation method comprises the following steps: (1) taking a low-melting-point nylon filament as an inner core, and weaving an outer layer by adopting ultra-high molecular weight polyethylene fibers to obtain a fishing line; the melting point of the low-melting-point nylon filaments is 80-100 DEG C; (2) the fishing line prepared in the step (1) is subjected to heating forming treatment, wherein the fishing line sequentially passes through a first traction machine, a first drying oven and a second traction machine; the temperature in the first drying oven is 90-100 DEG C; the roller speed of the first traction machine is 140 to 160 m / min; and the barrel speed of the second traction machine is 320-360 / min. According to the preparation method, an embedded waterproof structure is formed in the braided wire, meanwhile, the problem of looseness of the braided wire is reduced, and the overall strength is improved.

Rope (3) made of textile fiber material, comprising a rope core (6) and a sheath (7) surrounding the rope core (6), characterized by the fact that the rope (3) comprises at least one antistatic multifilament yarn (5) or one antistatic monofilament which is provided in the rope core (6), in the sheath (7), in an intermediate sheath (8) located between the rope core (6) and the sheath (7) and / or in a reinforcement located between the rope core (6) and the sheath (7), wherein the antistatic monofilament or single filaments (12) of the antistatic multifilament yarn (5) each comprise a conductive fiber core (13) encased in a non-conductive plastic sheath (14), and wherein at least one antistatic multifilament yarn (5) or antistatic monofilament is twisted with a thread (16) or yarn made of another material, wherein said other material of the thread (16) or yarn is preferably UHMWPE or PES.

The application discloses a kind of ultra-high molecular weight polyethylene fibers and preparation method thereof, belong to fiber preparation technical field, including following preparation steps: after ultra-high molecular weight polyethylene spinning stock solution is made into gelation pre-oriented silk and is balanced and placed, pretreatment is prepared pretreatment fiber;After pretreatment fiber is soaked in allyl glycidyl ether solution and soaked, the solution on the surface of pretreatment fiber is taken out and dried, and then ultraviolet irradiation is carried out, deionized water is washed, 6 dry and obtain epoxy group grafted fiber;Epoxy group grafted fiber is immersed in polybismaleimide solution, magnetic stirring, deionized water is washed, dried, and polybismaleimide grafted fiber is obtained;Polybismaleimide grafted fiber is sequentially pre-drafted, extracted, dried and positively drafted, and a kind of ultra-high molecular weight polyethylene fiber is obtained.The application enhances the high-temperature resistance of ultra-high molecular weight polyethylene fiber, and the maximum use temperature can reach 180 DEG C.

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.

The utility model discloses ultra-high molecular weight polyethylene fiber production equipment. The equipment comprises a cover body and a screw extruder mounted on one side of the cover body, an inner cover box is arranged in the cover body; a flat cavity shell is fixedly mounted at a discharge hole of the screw extruder in a communicating manner; a negative-pressure air exhaust mechanism is arranged at the top of the inner cover box, the output end of the negative-pressure air exhaust mechanism is connected with a negative-pressure cover, and a bottom opening of the negative-pressure cover communicates with the top of the left side of the flat cavity shell; the bottom of the flat cavity shell is provided with a plurality of discharging conveying assemblies in a communicating mode, and spinning nozzles are installed at the bottom ends of the multiple discharging conveying assemblies. The device has the beneficial effects that the ultra-high molecular weight polyethylene in a molten state is conveyed into the flat cavity shell through the screw extruder, passes through the bottom of the negative pressure cover, and is subjected to negative pressure suction through the negative pressure suction mechanism, so that negative pressure defoaming treatment of the raw materials is realized, and the phenomenon that the raw materials have bubbles in the raw materials is avoided; therefore, the produced fibers are hollow, and the processing quality is guaranteed.

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 application provides a kind of ultra-high molecular weight polyethylene slurry filtering, washing, pre-drying system and processing method, relating to ultra-high molecular weight polyethylene device, including pressure filter, the frame of pressure filter is divided into multiple independent filter units along circumference, drum is equipped in frame, control head is equipped in frame and drum;Multiple filter units are divided into filter unit group, washing unit group, pre-drying unit group and unloading unit.Compared with prior art, the application uses rotary pressure filter instead of the combination process of "centrifuge + stripping kettle + dehydrator" of existing ultra-high molecular weight polyethylene slurry post-treatment unit, separates the solvent of slurry, washes slurry and pre-dries slurry in one equipment, washes filter cake by using hexane solvent exchange and hot water washing combination, shortens process flow, and is more energy-saving compared with the way of completely evaporating solvent in stripping kettle by using hot water.

The invention discloses a preparation method of an ultra-high molecular weight polyethylene fiber with a gradient structure, which is characterized in that by introducing polytetrafluoroethylene modified by a silane coupling agent as a wear-resistant component, the dispersity and interfacial compatibility of the polytetrafluoroethylene in a matrix are improved, and the wear resistance of the fiber is improved while high strength and high modulus of the fiber are maintained. The wear resistance, the cutting resistance, the strength retention rate and the fatigue resistance are remarkably improved, and the method is suitable for the field of high-performance fibers and ropes.

The application relates to the field of fiber preparation, and discloses a kind of ultra-high molecular weight polyethylene fibers with adsorption and its preparation method and application, the raw material of the ultra-high molecular weight polyethylene fiber prepared includes ultra-high molecular weight polyethylene powder, antioxidant and filler;Wherein, the antioxidant is 0.2-1wt% of the ultra-high molecular weight polyethylene powder, and the filler is 0.5-3wt% of the ultra-high molecular weight polyethylene powder;Wherein, the filler is obtained by reacting metal salt and polybasic acid organic ligand dissolved in a first solvent, using the technical scheme provided by the application, the ultra-high molecular weight polyethylene powder has good corrosion resistance, the adsorption performance of ultra-high molecular weight polyethylene is improved by filler, the ultra-high molecular weight polyethylene fiber with adsorption is prepared, the specific strength is high, the specific modulus is high, and the adsorption capacity is as high as 200-600mg / g.

The application relates to the field of fiber rope detection, in particular to a kind of ultra-high molecular weight polyethylene fiber rope detection device.Overcome the existing ultra-high molecular weight polyethylene fiber rope detection device when detecting the wear resistance of ultra-high molecular weight polyethylene fiber rope, it is not comprehensive, and it is also less to carry out multi-angle simulation detection on ultra-high molecular weight polyethylene fiber rope.A kind of ultra-high molecular weight polyethylene fiber rope detection device, including base, the base is fixedly connected with support, the support middle part is fixedly connected with fixed table, the fixed table is equipped with placing mechanism.By driving the reciprocating swing friction of the friction surface of ultra-high molecular weight polyethylene fiber rope and friction plate, the friction scene of ultra-high molecular weight polyethylene fiber rope in actual use is simulated, so as to detect the wear resistance of ultra-high molecular weight polyethylene fiber rope.

The application provides an ultra-high molecular weight polyethylene fiber and a preparation method and application thereof, and the preparation method comprises the following steps: (1) mixing an ultra-high molecular weight polyethylene resin with a first solvent to obtain a spinning solution; (2) the spinning solution is subjected to swelling and dissolution in sequence to obtain a uniform solution; (3) the uniform solution is subjected to spinning and cooling in sequence to obtain a gel primary filament; (4) the gel primary filament is placed in a dispersion liquid to be extracted to obtain a modified gel primary filament; the dispersion liquid comprises a combination of a photo-initiator modified inorganic nano-particle, a cross-linking agent and a second solvent; (5) the modified gel primary filament is subjected to drawing and cross-linking reaction in sequence to obtain the ultra-high molecular weight polyethylene fiber. By using the preparation method provided by the application, the inorganic nano-particle and the polyethylene chain can be linked through a covalent bond, and a cross-linking network structure is formed between the polyethylene chains to some extent, so that the anti-creep performance of the ultra-high molecular weight polyethylene fiber can be improved.

The invention relates to an ultra-high molecular weight polyethylene fiber with excellent modulus and a preparation method thereof, and the preparation method comprises the following steps: mixing ultra-high molecular weight polyethylene powder and a carbon nanotube solution to obtain slurry; carrying out gel spinning on the slurry, extruding, and cooling to obtain gel fibers; the gel fibers are extracted and dried, and dried gel fibers are obtained; the xerogel fiber is subjected to multi-stage super-stretching to obtain a stretched fiber, the multi-stage super-stretching comprises three-stage stretching, the temperature of the first-stage stretching is 100-110 DEG C, and the stretching multiple is 4-5 times; the temperature of the second-stage stretching is 120-128 DEG C, and the stretching multiple is 6-7; the temperature of the third-stage stretching is 130-134DEG C, and the stretching multiple is 3-4 times; the stretched fiber is wound at the temperature of 120-125 DEG C, and the ultra-high molecular weight polyethylene fiber is obtained. According to the method, the modulus and strength of the ultra-high molecular weight polyethylene fiber are further improved.

The invention relates to the technical field of batteries, in particular to a common flexible thin film solid-state ion battery based on ultra-high molecular weight polyethylene and a preparation method of the common flexible thin film solid-state ion battery. The preparation method of the common flexible film solid-state ion battery based on the ultra-high molecular weight polyethylene comprises the following steps: S1, preparing a porous electrode; s2, preparing a diaphragm substrate; s3, preparing a current collector; and S4, assembling the battery. According to the method, efficient and low-cost manufacturing of the battery can be realized, and the battery has high interface stability, high ionic conductivity and excellent mechanical flexibility. The general flexible thin film solid-state ion battery based on the ultra-high molecular weight polyethylene is prepared by the preparation method; comprising a solid electrolyte layer, a porous electrode and a current collector, and the solid electrolyte layer is compounded on one side of the porous electrode through hot pressing; the current collector is an integrated current collector, and the integrated current collector is integrated on the other side of the porous electrode through a coating process; or the current collector is a porous current collector conductive film, and the porous current collector conductive film is compounded on the other side of the porous electrode through hot pressing. The battery has flexibility, safety and high energy density, the porous electrode and the solid electrolyte layer are firmly combined, the battery can be repeatedly bent without influencing the performance, and the battery is suitable for flexible electronic and wearable equipment.

The invention provides a low-deformation light-weight locally-reinforced bulletproof helmet, which relates to the field of helmet manufacturing, and comprises a basic protective layer (1), a locally-reinforced layer, a buffer energy-absorbing layer (3) and a lining comfortable layer (4), the local reinforcing layer is of a gradient material composite structure composed of a carbon fiber composite material layer (21), a silicon carbide ceramic particle reinforcing layer (22) and an aramid fiber composite material layer (23), and all the layers are combined through composite adhesive films. The buffering energy-absorbing layer (3) is arranged on the inner surface of the basic protective layer (1), and the lining comfortable layer (4) is arranged on the inner surface of the buffering energy-absorbing layer (3). The helmet has the characteristics of light weight and low deformation, local reinforcement is achieved, and the problems that an existing helmet is large in weight, poor in protection performance in key areas, large in deformation after being impacted and the like are solved.