157 results about "Heat setting" patented technology

The present application relates to the technical field of discontinuous reinforced short fibers, in particular to a high-performance composite short fiber and a preparation method thereof.The present application overcomes the contradiction between the hygroscopicity and mechanical properties of the composite short fiber and the problem of poor skin-core interface compatibility.By reacting acidified carbon nanotubes with hydroxyl-terminated hyperbranched polyester, and then melt extruding with PET chips, a high-strength core layer master batch is obtained;high-density polyethylene, a hydrophilic agent, hydrophilic modified MOF particles and E-GMA copolymer are mixed and extruded to obtain a skin layer PE master batch with long-term hydrophilicity;the skin and core layer master batches are spun into a skin-core structure, and after ring blowing cooling, two-bath drafting, heat setting, mechanical crimping and cutting, a composite fiber is obtained.The prepared PE / PET bicomponent composite short fiber not only has excellent tensile strength, but also has persistent and stable moisture absorption and sweat releasing functions.

A hot melt adhesive composition comprises a thermoplastic polyether ester block copolymer. The thermoplastic polyether ester block copolymer comprises 75 wt% to 85 wt% of polyester hard segments and 15 wt% to 25 wt% of polyether soft segments, the polyester hard segments are composed of aromatic polyester benzene ring functional groups reprocessed from recycled polyester products. The thermoplastic polyether ester block copolymer has a hardness of 35 shore D to 50 shore D and a melting point of 90 DEG C to 110 DEG C, and the proportion of regenerated PET is not less than 20 wt%. The present application also provides a hot melt adhesive film formed by the hot melt adhesive composition, and a shoe reinforcement comprising the hot melt adhesive film. The shoe reinforcement has an elastic loss rate of 25% or less. By using the hot melt adhesive composition, the shoe reinforcement can be obtained by heat setting treatment below 90 DEG C and has good resilience. In addition, using the hot melt adhesive composition to make the shoe reinforcement also helps the recycling of the whole shoe.

This utility model discloses a fabric take-up mechanism for a heat setting machine, relating to fabric heat finishing equipment technology. The key technical points are: it includes a frame and a take-up roller. Two symmetrically arranged mounting brackets are rotatably connected to the frame, which also houses a first adjusting roller and a second adjusting roller. The first adjusting roller exerts a downward vertical force on the fabric, which is balanced with the fabric's tension. When the taken-up fabric becomes longer due to setting, the tension is less than the force exerted by the first adjusting roller, causing the first adjusting roller to move downwards. This moves the second adjusting roller away from the take-up roller, lengthening the fabric between the second adjusting roller and the take-up roller, thus re-tensioning the fabric and restoring the tension to balance with the force exerted by the first adjusting roller. This design allows the first and second adjusting rollers to adjust the fabric tension on the take-up roller in real time, reducing the likelihood of wrinkles appearing on the fabric.

The application discloses a multi-stage stretching and heat setting acrylic filament preparation equipment and process, which comprises a multi-stage stretching structure, the multi-stage stretching structure is connected with a waste liquid treatment structure and is used for treating and recycling the waste liquid, a heat setting structure is installed on the upper side of the multi-stage stretching structure and is used for heat setting treatment of the acrylic filament, a heat energy recovery treatment assembly is connected with the heat setting structure and the waste liquid treatment structure and is used for recycling and reprocessing high-temperature heat energy, the multi-stage stretching structure comprises a bottom box, a first pretreatment assembly, a wet heat stretching assembly, a heat roller stretching assembly and an air cooling assembly are installed on the upper side of the bottom box, the wet heat stretching assembly is arranged on the right side of the first pretreatment assembly, the heat roller stretching assembly is arranged on the right side of the wet heat stretching assembly, and the air cooling assembly is arranged on the right side of the heat roller stretching assembly, the multi-stage stretching and heat setting acrylic filament preparation equipment and process are treated through multi-stage filtration, so that the waste water treatment effect is ensured, the treated waste water is stored in a liquid storage tank and is recycled finally.

The application discloses a steady-state unwinding device, process and application of high-rigidity high-frangibility high-torque wire, and belongs to the field of textile processing technology.The device realizes controlled rotation of the yarn cylinder and steady-state circumferential unwinding of the wire by clamping and positioning the upper and lower ends of the yarn cylinder and combining up-down, left-right and front-back adjustable structures and damping control, thereby effectively inhibiting the problems of knotting, small braids and tension fluctuation of high-rigidity high-frangibility high-torque wire caused by residual torque in the unwinding process.The steady-state unwinding process can output the wire in a uniform and continuous state, is suitable for textile processing of inorganic non-metallic high-torque fiber, high-modulus high-torque organic fiber and high-twist high-twist yarn, and can stably feed into processes such as plying, doubling, heat setting and weaving, thereby ensuring the consistency of wire tension and the stability of product performance in the subsequent processing process.

The present application relates to cashmere blended fabric heat setting technical field, disclose a kind of high shrink-resistant cashmere blended fabric high-temperature setting device and its setting process, including oven mechanism, oven mechanism includes preheating area, setting area and cooling area, preheating area inside fixedly installed with rack, and fixedly installed with multiple monitoring pole frame on rack, monitoring pole frame inside is provided with the determination wheel that is contacted with blended fabric surface, fixedly installed with the main shaft that is rotationally connected with monitoring pole frame on determination wheel, and fixedly installed with annular frame on monitoring pole frame side, annular frame inside is provided with the determination part for monitoring fabric moisture condition, this high shrink-resistant cashmere blended fabric high-temperature setting device, setting determination part including determination wheel, annular panel and arc panel in preheating area, real-time monitoring of fabric moisture content is realized, overwet signal is sent by centrifugal force trigger sensing element, effectively avoid subsequent shrinkage rate rebound process defects.

The application relates to the technical field of chemical fiber post-treatment, and particularly discloses a high-elasticity composite fiber heat treatment process, which comprises the following steps: S1. fiber pretreatment: polyester-polyamide composite raw materials are immersed in a surfactant cleaning solution with a concentration of 1-2 wt%; S2. steam pre-swelling: the pretreated raw materials are placed in a 105-110 DEG C saturated steam environment for 1.5-2.5 minutes; S3. gradient heat setting: the raw materials pass through three temperature-controlled hot air zones in sequence; S4. negative pressure rapid cooling: the heat-set fibers are cooled to a fiber temperature <50 DEG C; and S5. post-treatment setting: the fibers are wound into a cylinder. The fibers can be used in the high-end textile field, have the characteristics of low oil agent residue rate and high breaking strength, and solve the problem that cleanliness and mechanical properties are difficult to coordinate in the traditional process; the product size stability and processing efficiency are improved through the wind speed gradient ratio and humidity control.

The application relates to the field of vacuum aluminum-plated paper processing and specifically discloses a dry-wet compounding process for vacuum aluminum-plated paper. The dry-wet compounding process for vacuum aluminum-plated paper comprises the following preparation steps: S1, coating a bottom adhesive on a film, and heat setting one side of the bottom adhesive close to the film; S2, compounding the heat-set bottom adhesive with base paper, curing the bottom adhesive, and forming a bottom coating layer on the surface of the base paper; S3, vacuum aluminum plating on the side of the bottom coating layer away from the base paper to form a vacuum aluminum-plated layer; and S4, coating a surface adhesive on the side of the vacuum aluminum-plated layer away from the bottom coating layer, curing to form a surface coating layer, and obtaining vacuum aluminum-plated composite paper. The dry-wet compounding process can improve the amount of the bottom adhesive without causing overflow of the bottom adhesive, improve the folding resistance of the obtained vacuum aluminum-plated paper, and solve the color explosion problem.

This application relates to the field of webbing, and discloses a silk webbing. A silk webbing is woven and heat-set from a blended yarn containing silk fibers. The blended yarn is made from 55-60 wt% pretreated silk fibers, 18-23 wt% spandex fibers, and 19-24 wt% nylon fibers. The pretreated silk fibers are obtained by sequentially soaking, enzymatically hydrolyzing, fluffing, and drying the silk fibers. This application, through pretreatment of the silk fibers, produces a silk webbing with good breathability, softness, and shape retention. When used in underwear shoulder straps, it is less prone to deformation and shrinkage after long-term wear and washing, and it is less likely to cause sweating and skin irritation, thus improving comfort in contact with the skin.

The present application relates to the technical field of textiles, and provides a preparation method of a multi-directional elastic environment-friendly cloth, which solves the problem that existing elastic fabrics are difficult to simultaneously consider warmth, light weight, excellent multi-directional elasticity and environmental friendliness; the method comprises the following steps: S1, raw material preparation: including warp yarn, filling-in warp yarn and weft yarn; S2, on-machine weaving: on a loom, the warp yarn, the filling-in warp yarn and the weft yarn are interwoven to form a gray cloth with a three-dimensional net-like structure; the warp yarn is sequentially interwoven with weft yarns of different layers in a periodically changing oblique path to form a surface layer and a bottom layer of the fabric; the filling-in warp yarn is constrained in a straight line state between the surface layer and the bottom layer and does not interweave with the weft yarns; S3, post-finishing: the gray cloth obtained in step S2 is subjected to heat setting treatment to obtain a multi-directional elastic environment-friendly cloth; wherein the warp yarn is a composite porous elastic fiber; the weft yarn is a PTT filament; and the filling-in warp yarn is a para-aramid filament.

This utility model discloses a side panel heat-setting device, relating to the technical field of heat-setting equipment. It includes a base, a mounting frame fixedly installed on the top of the base, a fixing frame fixedly installed on the top of the base and behind the mounting frame, mounting grooves formed on the inner side of the connecting plate where it connects to the top of the mounting frame, an arc-shaped plate engaging within the mounting groove, a locking block fixedly installed at the center of the front side of the arc-shaped plate, mounting components arranged inside the mounting frame, and limiting components arranged at the bottom of the lifting plate on both sides of the heating plate. This utility model, through the cooperation of the locking block and the locking groove, and the secondary limiting by the limiting components, ensures that the seal to be processed strictly follows the preset path and position during the heat-setting process, significantly improving processing quality. Furthermore, the mounting components have a simple structure and are easy to operate, ensuring installation accuracy and stability, and facilitating installation, disassembly, and subsequent maintenance by personnel.

The application provides a forming process for directly spinning fibers of 6000D or more, and belongs to the technical field of high-performance fibers. Polyester chips are used as raw materials, the polyester chips are added into a screw extruder for melt spinning, a plurality of spinnerets corresponding to the screw extruder respectively extrude protofilaments, the protofilaments enter a drafting and heat setting process and winding to obtain fiber products of 6000D or more. The application can realize direct forming of fibers of 6000D or more, such as 6000D, 7000D, 8000D and 9000D, without doubling, and has the advantages of short process route, short cycle, low energy consumption, low cost, high breaking strength and the like.

The application discloses a preparation method of antibacterial self-crimping regenerated polyester fiber and belongs to the technical field of regenerated polyester spinning. The preparation method comprises the following steps: (1) calcining mixed boric acid, melamine and soluble zinc salt in an inert atmosphere to obtain zinc-containing hexagonal boron nitride; (2) mixing and impregnating the zinc-containing hexagonal boron nitride and quaternary ammonium salt ionic liquid to obtain modified zinc-containing hexagonal boron nitride; (3) mixing the modified zinc-containing hexagonal boron nitride, polyester bottle pieces and ethylene glycol, and performing alcoholysis reaction to obtain a mixture A; (4) drying and melting the polyester bottle pieces and the mixture A respectively and sequentially, and then performing parallel composite spinning to obtain primary fibers; and (5) performing drafting, crimping, cutting and relaxation heat setting on the primary fibers to obtain the regenerated polyester fiber. The single regenerated polyester is used as a raw material, alcoholysis catalysis is performed on the modified zinc-containing hexagonal boron nitride, viscosity difference of the system is realized, and the regenerated polyester fiber with excellent self-crimping effect and antibacterial performance is prepared.

This invention relates to the field of membrane materials technology, specifically to a biaxially stretched polyolefin film, its preparation process, and its applications. This invention solves the problem of uneven microstructure caused by non-uniform preheating and stretching of thick gel castings in existing technologies through a specific heat-setting process. It provides a gel film precursor with uniform three-dimensional properties (i.e., along the film production line's forward direction, width direction, and thickness direction) for subsequent stretching, thereby obtaining a microporous membrane with narrower pore size distribution and a more regular structure. It also solves the problem of the limiting stretching ratio restricted by the accumulation of stress within the connecting chains in existing stretching processes. By relaxing stress and widening the process safety window, it enables higher-ratio uniform biaxial stretching, thereby improving the final mechanical strength (such as tensile strength) and air permeability of the microporous membrane.

This utility model belongs to the field of steam condensate recycling technology, specifically relating to a steam condensate recycling device for heat setting of dry PAN-based carbon fiber precursor. The steam condensate recycling device for heat setting of dry PAN-based carbon fiber precursor includes a heat setting device, a premixer, a steam ejector, a washing tank, and a heat exchanger connected in sequence. The input ends of the premixer and the steam ejector are both connected to a high-pressure steam pipeline, and the high-pressure steam pipeline has branches connected to the heat setting device. This utility model's steam condensate recycling device for heat setting of dry PAN-based carbon fiber precursor achieves efficient utilization of condensate waste heat by recovering both high-temperature and low-temperature condensate. The premixer and steam ejector work together, with a reasonable structural design. Optimized processing flow using ramps, spiral plates, and other structural elements, along with multi-path mixing of high-pressure steam and high-temperature condensate, improves efficiency and ensures stable conversion of low-pressure steam.

The application provides a preparation method of high-elasticity anti-ultraviolet short fiber filament composite yarn, and solves the problems of single function, insufficient elasticity and poor anti-ultraviolet durability of traditional yarns through differential pretreatment, segmented cotton mixing, variable twist roving, double-elasticity system sirofil composite spinning and far-infrared synergistic heat setting innovative process. The method uses seaweed fiber and hemp fiber as raw materials, softens hemp through mechanical rubbing and twisting, alkali boiling and swelling, improves seaweed fiber through low-temperature plasma etching and gradient drying, combines double-elasticity filament bundle and a dynamic tension compensation device, and finally prepares yarn with an elasticity recovery rate of greater than or equal to 90%, an UPF of greater than or equal to 55, and the functions of moisture absorption, antibiosis and far-infrared radiation. The production efficiency is improved by 50%, the energy consumption is reduced by 30%, and the method is suitable for summer clothes and sports clothing fields and has remarkable economic and social benefits.

This application relates to the field of cable manufacturing processes, and in particular to a manufacturing process and pretreatment equipment for low-loss millimeter-wave test cables. To address the problem of unstable dielectric constant and high high-frequency signal loss caused by interlayer gaps, the steps are as follows: First, conductor pretreatment, selecting silver-plated copper conductors, cleaning and drying them in pretreatment equipment; Second, PTFE insulation layer wrapping and heat setting, using PTFE film to wrap the pretreated silver-plated copper conductor in layers, followed by high-temperature heat setting in a heat setting furnace; Third, wrapping silver-plated copper flat strips around the PTFE insulation layer; Fourth, sequentially wrapping composite aluminum foil and PTFE film around the silver-plated copper flat strips to form a stabilizing layer; Fifth, preparation of the braided shielding layer. This application has the dual advantages of achieving high-frequency low loss and high structural stability, solving the problems of high high-frequency signal loss and poor structural stability in existing millimeter-wave test cables.

This invention discloses a natural fiber absorbent and highly resilient cotton towel and its preparation method, relating to the field of medical consumables technology and belonging to patent classification number A61Q19 / 00. The method includes opening and mixing bamboo pulp fibers and flax fibers, cross-carding, and air-forming them into a web to obtain a base fabric; sequentially subjecting it to alkali impregnation and washing, ultrasonic treatment, and selective oxidation with TEMPO to obtain an activated oxidized base fabric; then immersing it in a chitosan quaternary ammonium salt solution for electrostatic loading treatment; subsequently immersing it in a crosslinking solution containing nanocellulose whiskers, epoxidized soybean oleic anhydride, and triethylamine for heated reflux crosslinking; finally immersing it in a synergistic bridging solution containing anhydrous citric acid and γ-aminopropyltriethoxysilane, followed by drying and high-temperature heat setting treatment to obtain the final product. This invention significantly improves the absorbency and resilience of the cotton towel, and the product is environmentally friendly and biodegradable.

The application discloses a low-melting-point polyester staple fiber spinning oil and a preparation method and application thereof, and belongs to the technical field of polyester spinning oil. The low-melting-point polyester staple fiber spinning oil comprises the following raw materials in parts by mass: a smoothing agent 20-50 parts, an antistatic agent 30-60 parts, a bundling agent 10-25 parts, an emulsifier 10-30 parts and an additive 0.1-5 parts. The low-melting-point polyester staple fiber spinning oil has good system stability and use performance, can improve the smoothness, antistatic property, bundling property and dispersibility of the fiber, and effectively improves the problems of softening, doubling, adhesion and the like occurring in the spinning, drafting, crimping and heat setting processes, thereby improving the spinnability, processing stability and product quality. The low-melting-point polyester staple fiber spinning oil has the advantages of storage stability, small corrosion and low cost, and is suitable for industrial application.

This invention provides a coating process for improving the pressure-holding performance of OPW airbags, relating to the field of airbag manufacturing technology. The process includes the following steps: S1: Coating the OPW airbag fabric with a layer of silicone rubber with a viscosity of 13-20 Pa·s and a coating weight of 15-25 g / m²; S2: Baking in several sections of a continuous heat-setting oven, with the baking temperature increasing sequentially from 100-160°C and the baking speed at 20-30 μd / min; S3: Applying a second coating layer on top of the first coating layer, the second coating using silicone rubber with a viscosity of 200-400 Pa·s and a weight of 30-45 g / m²; S4: Baking again in several sections of a continuous heat-setting oven, with the baking temperature increasing sequentially from 160-205°C and the baking speed at 15-20 μd / min. This invention also provides an OPW airbag. This solution can effectively improve the airtightness of the OPW airbag.

The application discloses a preparation method of low-load warp-weft high-elongation automobile interior microfiber material, and belongs to the technical field of microfiber leather preparation. The method comprises the following steps: spinning island-in-sea fibers with PA6 as island components, LDPE as sea components and in combination with spinning master batches; manufacturing non-woven fabric containing LDPE-200 type reinforced cloth; heat setting the non-woven fabric; immersing the non-woven fabric in flame-retardant polyurethane slurry and then water-bath curing; peeling off the sea components and the reinforced cloth by using toluene; and finally performing continuous rubbing, drying and other finishing steps. Through optimization of spinning, non-woven fabric, wet process, weight reduction and finishing process, the application solves the problems of poor elasticity and low warp-weft elongation of conventional microfiber leather, so that the tensile load is less than or equal to 15N when the warp-weft elongation of the product reaches 10%, and the product meets the demand of automobile interior.

This invention relates to the field of textile manufacturing technology, specifically to a method for preparing polyester fibers for automotive interior carpets by stretching. The method includes steps such as crosslinking modifier preparation, modified spinning melt formulation, low-temperature orientation stretching, high-temperature reactive stretching, and relaxation heat setting. The method combines polyester chips with a terminal hydroxyl hyperbranched multifunctional polysiloxane crosslinking modifier to covalently anchor flame-retardant and antistatic segments within the polyester macromolecular network. The key technology of this invention lies in the activation of titanium acetylacetonate during the high-temperature stretching stage, which promotes an ester exchange crosslinking reaction between the terminal hydroxyl groups of the modifier and the ester bonds of the polyester molecular chains, constructing chemical crosslinking points in situ under the stretched orientation state. This invention overcomes the defects of traditional physical blending agents, such as stress concentration, high breakage rate, and easy loss of function. By utilizing the orientation-crosslinking structure, it effectively prevents molecular chain slippage under pressure, effectively improving the irreversible deformation problem of carpets under long-term cyclic compression loads, and ensuring the fiber's durable high compression resilience, flame retardant, and antistatic properties.

The present application relates to the technical field of glass fiber, and particularly relates to a glass fiber yarn heat setting treatment method, which comprises the following steps: step 1: placing electronic-grade glass fiber yarn on a yarn machine, then placing the yarn machine in a steam furnace, and closing the door of the steam furnace; step 2: starting a vacuum pump on the steam furnace to perform vacuumization on the furnace; step 3: continuously adding hot steam into the steam furnace; and step 4: releasing the pressure in the furnace, opening the door of the steam furnace, and completing production. On the basis of the production of the existing electronic yarn product, the steam furnace is subjected to process parameter test, and the best production process is matched, so that the heat set yarn meeting the requirements of customers is obtained, including the transfer of the raw yarn, the setting of the machine parameter, and the checking of the process, which is beneficial to eliminating the internal stress between the fiber assemblies in each stage of spinning, and the heat setting performance of the yarn after production is evaluated, the yarn is tight and has no looseness, and has certain resistance to degradation, which meets the requirements of customers and the market.

The application discloses an antibacterial and anti-ultraviolet functional composite fiber preparation method, system, equipment and medium, and particularly relates to the technical field of textile materials, and comprises the following steps: preparing surface-modified nano-silver antibacterial master batches and surface-modified nano-zinc oxide anti-ultraviolet master batches; after the fiber matrix resin is melted, the fiber matrix resin is divided into three melt flow paths; an antibacterial agent concentration continuously decreasing and an anti-ultraviolet agent concentration continuously increasing reverse gradient melt is prepared through online dynamic gradient mixing; then, the reverse gradient melt is formed into a skin-core structure with an antibacterial gradient outer layer, an anti-ultraviolet gradient intermediate layer and a pure matrix core layer through coaxial three-layer composite spinning; finally, the gradient distribution is fixed through gradient side-blowing air cooling, multi-stage stretching and constant-tension heat setting, so that the antibacterial and anti-ultraviolet functional composite fiber is obtained. The application solves the problem of mutual antagonism of functional components, and the prepared fiber has long-acting antibacterial and high-efficiency anti-ultraviolet performances.

The application discloses a preparation method of high-elasticity durable polyester fiber, which comprises the following steps: performing a winding treatment on polyester raw material silk; performing low-temperature plasma surface modification on the fiber after the winding treatment; performing twisting on the modified fiber, and introducing phase change microcapsules into the fiber tows through an interlacing nozzle in the twisting process, so that the microcapsules are physically embedded between the fiber filaments; placing the twisted fiber in a supercritical carbon dioxide fluid for heat setting treatment; and finally obtaining the high-elasticity durable polyester fiber through a cylinder reversing treatment. Through the synergistic effect of the low-temperature plasma modification, the microcapsule embedding in the twisting and the supercritical carbon dioxide heat setting, the fiber has high elasticity and intelligent temperature adjusting functions, the elastic recovery rate is higher than 94%, and the retention rate of the microcapsules is higher than 90% after 20 times of washing. The application has simple process, is environment-friendly and waste water-free, and the obtained fiber is suitable for high-grade garment fabrics and functional lining.

The present disclosure relates to a processing method of worsted cashmere elastic suiting and the worsted cashmere elastic suiting, the processing method of worsted cashmere elastic suiting comprising the following steps: S1, processing worsted cashmere yarn and worsted cashmere spandex core spun yarn on a loom; S3, weaving a grey cloth by using the worsted cashmere yarn as warp and the worsted cashmere spandex core spun yarn as weft; S5, processing the grey cloth into the worsted cashmere elastic suiting in a spinning workshop through post-finishing, the post-finishing comprising, in sequence, raw finishing, heat setting, intermediate inspection, barrel sewing, air washing, dehydration, wet inspection, first drying, intermediate inspection, final finishing, steel wire raising, prick fruit raising, second drying, first ironing, first shearing, second ironing, second shearing, continuous steaming and tank steaming. Through the post-finishing processes of steel wire raising and prick fruit raising, the worsted cashmere elastic suiting product forms uniform and long straight pile on the surface, realizes the characteristics of fabric loftiness and light touch, and improves the warmth retention performance of the fabric.

The utility model discloses a kind of multi-effect synergic anti-wrinkle non-deformation pearl plush forming device, belong to pearl plush processing technical field, its technical scheme main points include support frame, the inner side of the support frame is provided with conveying mechanism, hot setting mechanism is welded in the both sides of support frame top, the hot setting mechanism includes mounting bracket, screw rod, threaded sleeve, servo motor, connecting rod, rotating roller, several heating rods, setting roller and temperature sensor, heating rod in hot setting mechanism is evenly distributed in rotating roller surface, cooperate temperature sensor real-time monitoring temperature, and adjust through PLC feedback, ensure that setting roller surface temperature is stably in optimum range, both guarantee that fabric fiber is fully set, avoid damage or deformation caused by overheating, setting roller is driven screw rod to adjust height by servo motor, can be flexibly adjusted with the interval of conveying belt according to fabric thickness, ensure that pressure is uniform, make the texture of pearl plush surface set clear, form consistent, improve product appearance texture.

The present application relates to the technical field of polyester fiber, in particular to a high-strength polyester fiber and a preparation method thereof.The present application overcomes the technical problems of low mechanical strength and poor durability of the polyester fiber in the prior art.The present application prepares a composite functional master batch by stepwise melt extrusion of dopamine-modified zinc oxide, modified bentonite, epoxy-modified silicon dioxide, pyromellitic dianhydride, composite antioxidant and polyester chip; then the master batch is mixed with the remaining polyester chip for spinning, the melt is extruded by shearing and homogenization, and the nascent fiber is prepared by heating, delayed slow cooling and side blowing cooling solidification; finally, the high-strength polyester fiber is prepared by three-stage drawing and heat setting.The present application greatly improves the mechanical strength and durability of the polyester fiber through the synergistic effect of multi-dimensional functionalized nanomaterials and the construction of crosslinked network, combined with the multi-stage heat bath drawing process.