1778results about "Melt spinning methods" patented technology

The invention discloses a wool type fiber spinning process precise control system and method, and relates to the technical field of fiber materials.According to the method, a perturbation gas injection groove is introduced into a spinning hole side structure, and gas injection parameters are collected in real time in combination with an MEMS micro-thermal film flow meter, a binocular infrared imager and other equipment; standardized preprocessing and feature extraction are carried out on gas injection data through a central control server, the directional deflection Odev can be accurately calculated, dynamic comparison and evaluation are carried out according to a deflection interval threshold value, and therefore the active regulation and control capacity on the initial deflection angle and the curling direction of fibers is achieved. Different from a traditional spinning process that fiber deflection completely depends on a mold, temperature or subsequent drafting disturbance, the method can construct a stable disturbance induction force field at the moment of fiber ejection, it is ensured that a fiber nascent path has consistency, directivity and predictability, and controllable guide conditions are provided for subsequent wool type structure construction.

The invention relates to the field of regenerated fiber production equipment manufacturing and process integration, and discloses a modular intelligent continuous regenerated fiber production line which comprises a sorting and cleaning module, a melt extrusion module, an impurity filtering module, a granulation module, a decoloration module, a solid phase polycondensation tackifying module and a melt spinning module. The self-adaptive material distribution device is used for realizing material connection among the modules; the automatic control system is used for realizing collaborative operation of all the modules; wherein the solid phase polycondensation tackifying module is provided with an intelligent control unit for dynamically optimizing the operation of the solid phase polycondensation tackifying module. Compared with the prior art that each process is relatively independent and depends on manual scheduling or simple linkage, the scheme effectively overcomes the common problems of unsmooth material conveying, unbalanced matching between modules and insufficient automation degree in the traditional regeneration process, and remarkably improves the production continuity and the resource utilization rate.

The invention relates to the technical field of antibacterial and antifouling fabrics, provides a preparation method of an antibacterial and antifouling fabric, and solves the problem of poor fabric durability caused by single functional component and lack of physical protection in the prior art. The preparation method comprises the following steps: S1, preparing MOFs loaded antibacterial fibers: blending a metal organic framework antibacterial composite nanomaterial and a polymer matrix material, and carrying out melt spinning to prepare the MOFs loaded antibacterial fibers; s2, constructing a self-cleaning functional coating: dispersing the fluorinated nanoparticles and a polymer adhesive in a solvent to prepare a self-cleaning coating solution; s2, performing surface activation treatment on the MOFs-loaded antibacterial fiber obtained in the step S1, soaking the MOFs-loaded antibacterial fiber in the self-cleaning coating liquid, and performing pulling and curing to form a bionic micro-nano structure coating on the surface of the MOFs-loaded antibacterial fiber so as to obtain a functional composite fiber; s3, spinning forming: taking the functional composite fibers obtained in the step S2 as warp yarns and / or weft yarns, and weaving to obtain the antibacterial and antifouling fabric.

The invention discloses a silicon dioxide aerogel chinlon 6 composite fiber and a preparation method thereof, and belongs to the technical field of chemical fibers. The preparation method comprises the following steps: firstly, carrying out surface modification on silicon dioxide aerogel by adopting an alcohol ester method to obtain modified silicon dioxide aerogel powder with improved hydrophobicity, and then uniformly mixing and blending PA6 slices and the silicon dioxide aerogel powder to prepare the silicon dioxide aerogel chinlon 6 composite master batch. And finally, mixing and extruding the silicon dioxide aerogel and chinlon 6 composite master batch and PA6 slices, and carrying out melt spinning to finally prepare the silicon dioxide aerogel and chinlon 6 composite fiber. Hydrophobically modified silicon dioxide aerogel is uniformly dispersed in a chinlon 6 matrix, so that the heat conductivity coefficient of the silicon dioxide aerogel and chinlon 6 composite fiber is remarkably reduced, and the prepared silicon dioxide aerogel and chinlon 6 composite fiber has good light weight, flexibility and wear resistance while keeping high heat retention property; the bottleneck of poor mechanical property of the traditional aerogel composite material is broken through.

The invention provides a multifunctional passive cooling optical metamaterial fiber, yarn and fabric and a preparation method thereof. The passive cooling optical metamaterial fiber is composed of high-refractive-index inorganic micro-nano particles and / or a micro-nano functional material and a polymer substrate material. Wherein wavelength / sub-wavelength scale micro-nano particles are uniformly distributed in a substrate material as a random scattering medium to form a random optical metamaterial system, and reflection enhancement of the optical metamaterial fabric in a solar spectrum band is realized by utilizing a multiple Mie resonance collective effect. According to the passive cooling optical metamaterial fiber, a circular structure, a skin-core structure and the like are prepared through melt spinning, high-refractive-index inorganic micro-nano particles are added into a skin layer and used for sunlight band wide spectrum regulation and control, and a micro-nano functional material is added into a core layer, so that multiple functions are effectively achieved.

The invention relates to the technical field of chinlon industrial yarns, and discloses a preparation method of a high-strength and high-toughness chinlon industrial yarn, which comprises the following steps: (1) preparing raw materials; (2) mixing the materials; (3) melt spinning; (4) stretching and heat treatment; (5) fiber surface modification; according to the invention, by fusing the advantages of high crystallization speed of nylon 6 and high melting point and high strength of nylon 66, a matrix material with good processing fluidity is formed, and the strength and fatigue cycle resistance of the chinlon industrial fiber are obviously improved. By introducing the maleic anhydride grafting agent, polar groups can be introduced among molecular chains through grafting reaction, so that the hydrogen bond density and crystallinity are remarkably improved, the molecular chains are arranged more regularly, and the tensile strength and heat resistance of the material are improved. The sea-island structure of the polyether ester elastomer effectively absorbs impact energy, so that the elongation at break is greater than or equal to 28%; the nano silicon dioxide inhibits crack propagation, and the service life of the material is remarkably prolonged.

The invention relates to the technical field of knitted fabrics, in particular to a high-strength wear-resistant anti-snagging functional dry knitted fabric for exercise training and a production process thereof, and the production process comprises the following steps: weighing the following raw materials in parts by weight: 30-40 parts of polyester fibers, 20-30 parts of aramid fibers, 5-10 parts of jade fibers and 5-10 parts of polyamide fibers; polyester fibers, aramid fibers, jade fibers and polyamide fibers are subjected to relaxation treatment and then subjected to a drawing procedure, and the mixed roving is obtained. According to the knitted fabric for exercise training, polyester fibers, aramid fibers, jade fibers and polyamide fibers are blended and blended to prepare mixed roving, meanwhile, the mixed roving is infiltrated and improved through infiltrating liquid, finally, the mixed roving is matched with modified polyester filaments to be subjected to circular knitting improvement, and the obtained knitted fabric has the advantages of being excellent in wear resistance, mechanical strength performance and snagging performance, good in elasticity and good in elasticity. And the knitted fabric has remarkable moisture absorption, dryness and dryness and washing resistance, and the comprehensive coordination of the product is excellent.

The invention provides a superfine denier profiled polyester staple fiber and a preparation method thereof.The preparation method includes the steps of raw material pretreatment, melt spinning, nascent filament treatment, heat setting and curling, oiling and cutting off and the like, polyester chips have high intrinsic viscosity and melting point, and under the action of six-zone temperature control, a high-hole-density spinneret plate and a high draft multiple, the polyester chips are subjected to melt spinning, so that the polyester chips are prepared into the superfine denier profiled polyester staple fiber. The superfine, special-shaped and hollow polyester staple fibers are prepared. The obtained polyester staple fiber has good breaking strength, rebound resilience and a low-defect structure, the bulkiness, flexibility and structural consistency of the fiber are remarkably improved, the environment and process limitation of a traditional sea-island fiber alkali stripping method is broken through, and the polyester staple fiber is suitable for the fields of high-end filling, plush imitation, non-woven materials and the like.

The invention discloses a light-weight moisture-conducting functional fabric and a preparation method thereof, and relates to the technical field of textile, the light-weight moisture-conducting functional fabric comprises an inner layer and an outer layer, the inner layer is obtained by blending polyester fibers and nylon special-shaped section fibers, and the outer layer is obtained by blending modified polypropylene fibers and hollow polyester fibers; the modified polypropylene fiber is obtained by mixing polypropylene slices and modified jade powder, melting, spinning and stretching; the prepared fabric has the light weight characteristic and the one-way moisture guiding capacity, sweat can be rapidly discharged out of the body, dry and comfortable isolation between the skin and the outside is achieved, and multiple health protection functions such as lasting antibiosis, efficient ultraviolet resistance and contact cool feeling are organically integrated.

The invention relates to the technical field of spunbond non-woven fabric manufacturing, in particular to a low-cost recyclable spunbond non-woven fabric manufacturing method capable of replacing traditional kraft paper, and the method comprises the steps of raw material preparation, melt extrusion, spinning web forming, hot-press shaping, cooling and trimming, post-processing, coiling and forming and the like. Raw materials comprise polypropylene particles, degradable master batches and recycled spunbond non-woven fabric fragments, the recycled fragments are subjected to surface modification treatment, and the degradable master batches contain polylactic acid, a starch-based degradation agent and other components. The non-woven fabric is quantified to 80-120 g / m < 2 > by optimizing processes such as a barrier type screw, infrared preheating and laser trimming and cooperating with water-repellent and antistatic post-treatment, the mechanical properties such as tensile strength, tearing strength and folding resistance are superior to those of traditional kraft paper, the non-woven fabric can be recycled for at least three times, and the degradation period is controllable; the method realizes closed-loop utilization of raw materials, reduces cost and energy consumption, expands application in the fields of packaging, agriculture and the like, and has remarkable economic and environmental benefits.

A method for preparing direct melt-spun high-viscosity PBAT / low-viscosity PET two-component elastic fiber and a high-viscosity PBAT polymerization reactor. This method uses two production lines respectively used to produce a high-viscosity PBT melt and a low-viscosity PET melt, which are then spun. The high-viscosity PBAT production line comprises a first esterification reactor, a second esterification reactor, a first prepolymerization reactor, a second prepolymerization reactor, and a high-viscosity PBAT polymerization reactor. The polymerization reactor is designed with a special disc structure in a parallel two-shaft disc reactor, and the two shafts are rotated in opposite directions, improving the devolatilization effect and self-cleaning, significantly increasing the viscosity. By using this method, the cost is low and the production capacity is high, the process flow is shortened, the fiber strength can reach 2.55˜2.85 cN / dtex, the crimp shrinkage rate can reach 25%˜60%, and the crimp stability can reach 58%˜70%.

The invention provides a multifunctional polyester yarn production system and an intelligent regulation and control method thereof, and relates to the field of chemical fiber spinning engineering. Comprising a multi-source sensing module, the multi-source sensing module carries out real-time acquisition processing on a multi-physics coupling process state set to form process state basic data, and the acquisition processing adopts a multi-type sensing device. And the depth inference processing module is used for carrying out space-time coupling inference processing on the process state basic data to form a process state recognition result. According to the multifunctional polyester yarn production system, through real-time acquisition and depth inference processing of multi-physical field data by the multi-source sensing module, accurate identification and prediction of a process state in a production process are realized. According to the multifunctional polyester yarn production system and the intelligent regulation and control method thereof, a space-time joint prediction model is used, the space-time joint prediction model comprises a graph convolutional network and a long-short-term memory network, space and time characteristics in data are fully mined, and the accuracy of process state recognition is improved.

The invention relates to the field of conductive fiber manufacturing, and discloses a light-color conductive fiber production process which comprises the following steps: mixing: mixing a matrix polymer, a conductive matrix polymer, a nano filler and a metal oxide in proportion; performing melt blending: performing melt blending on the mixture through a double-screw extruder to form conductive master batches; performing composite melt spinning: mixing the conductive master batch and a matrix polymer according to a mass ratio of 1: 4-1: 6, and performing melt spinning to form a fiber with a skin-core structure; and stretching and shaping: stretching and heat-shaping the obtained fibers, wherein the multifilament density is 50-200D. Through a composite conductive system of the conductive matrix polymer, the nanofiller and the metal oxide, the construction of a multi-dimensional synergistic conductive path is realized. Compared with a traditional technical scheme of constructing a conductive network depending on a single filler, the defects that the conductive network is easy to break and the conductivity is unstable are overcome, and the conductivity of the fiber under a dynamic condition is ensured.

The invention belongs to the technical field of soft robots, and discloses a lockable driver based on artificial muscles and a driving method of the lockable driver. The driver comprises an artificial muscle bundle, a locking device and a flexible connector, the artificial muscle bundle is formed by weaving a plurality of CD-ROM liquid crystal elastomer fibers in a chain shape, and 30%-50% of reversible contraction deformation can be generated under illumination; the locking device is of a layer blocking variable stiffness structure, and millisecond soft-hard state switching is achieved through vacuum negative pressure. During driving, light initiates phase change shrinkage of the liquid crystal elastomer, and then the locking device is vacuumized to fix deformation; and the flexible state can be recovered by charging positive pressure when the pressure is released. The problems that a traditional flexible driver is high in standby energy consumption and poor in load capacity are solved, the high deformation capacity and the lockable rigidity are achieved, and the flexible driver can be widely applied to the fields of exoskeletons, rehabilitation instruments and the like.

The invention discloses a wear-resistant non-woven fabric and a preparation method thereof, and relates to the technical field of non-woven fabrics, the non-woven fabric is prepared from the following components by weight: 40-70 parts of low density polyethylene, 30-45 parts of polypropylene, 10-25 parts of modified bamboo fiber, 10-16 parts of barium sulfate, 6-9 parts of an antioxidant, 3-7 parts of a plasticizer, and 1-4 parts of a binder; through a bamboo fiber modification technology, the comprehensive mechanical property of the material is improved, the service life of the material is prolonged, the comfort and environment-friendly characteristics are also considered, and the prepared non-woven fabric has a lasting and stable antibacterial function while maintaining excellent wear resistance.

The invention relates to the technical field of flocking fibers, and discloses a fiber material for electrostatic flocking of an automobile spring and a preparation method thereof.The preparation method comprises the steps that a diamine monomer and a diacyl chloride monomer are subjected to a polymerization reaction and then react with KH550 modified mesoporous nano-silica, and polyamide modified mesoporous nano-silica is obtained; and finally, blending with nylon 66, melting and spinning to obtain the nylon fiber. The silicon dioxide contains a hollow mesoporous structure, and when sound waves enter the silicon dioxide, the sound waves can be reflected and scattered for multiple times in the internal hollow and pore channels, so that the energy of the sound waves is dissipated, and a good sound absorption effect is achieved. Meanwhile, a polyamide molecular chain grafted on the surface of the silicon dioxide contains a large number of hydrophobic alkyl long chains which are uniformly dispersed in a fiber matrix, so that the hydrophobicity of the fiber matrix can be improved, the water contact angle and the water resistance and waterproofness are improved, and good practical application is achieved in the aspects of electrostatic flocking fibers for automobile springs and the like.

The invention discloses a synthetic leather nascent fiber melt extrusion device and a use method, and belongs to the technical field of spinning machines.The synthetic leather nascent fiber melt extrusion device comprises a shell, an injection pipe is installed at the position, close to the upper end, of the left side of the shell, a conveying pipeline is installed at the position, close to the lower end, of the right side of the shell, and a spinneret plate is installed at the right end of the conveying pipeline; and a filter cartridge is mounted in the shell. The motor can drive the filter cartridge to rotate and dynamically change the filtering area, so that the possibility of blockage of the filtering holes is effectively reduced, the uniformity of the filtering process is ensured, excessive blockage of the local filtering area is avoided, and when the filter cartridge rotates, the touch block is utilized to touch the touch switch, so that the filtering efficiency is improved. The electromagnet is instantly controlled to drive the cleaning needle to automatically clean impurities and small bubbles in the filter holes, then the small bubbles are discharged in time by using vibration force during cleaning, and the problem that the bubbles penetrate through the filter holes due to pressure deformation, and spinning is interrupted is solved.

The invention discloses an anti-ultraviolet high-flame-retardant polyester fiber and a preparation method thereof. The polyester fiber is prepared from the following raw materials in parts by weight: 100 parts of polyester chips, 20-60 parts of core-shell flame-retardant anti-ultraviolet particles and 2-4.5 parts of an anti-dripping agent. According to the invention, a porous alumina-titanium dioxide compound is used as a carrier, a magnesium hydroxide flame retardant, iron-doped carbon dots with photo-thermal performance and auxiliaries (an antioxidant and an ultraviolet light absorber) are combined with the carrier to construct a structural system loaded with multiple active components: functionalized flame-retardant particles, and then a polyurethane microporous membrane is coated, so that the flame-retardant polyurethane composite material is obtained. The core-shell type flame-retardant anti-ultraviolet particles are added into polyester fibers, so that the anti-ultraviolet performance and the flame-retardant performance of the polyester fibers can be remarkably improved. The polyester fiber provided by the invention can adaptively increase the release rate of the ultraviolet absorbent and the antioxidant when the ultraviolet property is enhanced in the environment, so that more optimized protection can be provided for a polyester fiber matrix at the moment.

A waste polymer recycling process may include: (1) obtaining waste polymer (e.g., waste solution dyed carpet yarn); (2) pelletizing the waste polymer; (3) obtaining green and clear polymer; (4) providing an extrusion line that includes a dosing system, an extruder, a spinning machine, and a color sensor; (5) using the dosing system to dose a first amount of the pelletized waste polymer, a second amount of the green polymer (e.g., a second amount to offset a color of the first amount of the pelletized waste polymer), and a third amount of the clear polymer into the extruder; (6) forming the extruded polymer combination into carpet yarn using the spinning machine; (7) using the color sensor to determine a color of the carpet yarn and (8) using the dosing system to adjust at least one of the amount of pelletized waste polymer, green polymer, and / or clear polymer introduced into the extruder.

The invention discloses an anti-fibrosis drug coating degradable woven stent for treating urethrostenosis, the stent is a hollow cylinder formed by spirally weaving wires, the wires are made of biodegradable polymer materials, the surface of the stent is coated with a drug coating, anti-fibrosis drugs are selected as the drugs, and the anti-fibrosis drug coating is made of biodegradable polymer materials. The drug coating is prepared by using an ultrasonic atomization spraying method; the biodegradable polymer material comprises one or a compound of more than one of poly L-lactic acid, poly D, L-lactic acid, poly (L-lactic acid / D, L-lactic acid), poly (glycolide / lactide), poly (glycolide-lactide), poly (L-lactic acid / caprolactone), poly (glycolide / caprolactone), poly (D, L-lactic acid / caprolactone), polydioxanone and the like. The stent body is made into a self-expanding stent by adopting a weaving method; the biodegradable ureteral stent with the drug coating has good biocompatibility, degradability and mechanical property, and has a wide market application prospect.

The present invention belongs to the technical field of the preparation of bio-based functional fibers, and relates to a preparation method of highly shrinkable polyethylene furandicarboxylate fibers. Preparation method: The polyethylene furandicarboxylate chips are dried and then melt-blended and spun to obtain highly shrinkable polyethylene furandicarboxylate fibers. The linear density of the fibers is 2.22 - 4.44 dtex, and the linear density deviation rate is -5% - 5%. The breaking strength of the fibers is 3.5 - 4.5 cN / dtex, the breaking elongation rate is 53.5 - 68.5%, the content of ultra-long fibers is 0 - 3 mg / 100 g, the content of defects is 3 - 20 mg / 100 g, the number of crimps is 12 - 15 per 25 mm, the crimp rate is 14% - 18%, and the boiling water shrinkage rate is 60 - 80%. The highly shrinkable polyethylene furandicarboxylate fibers prepared by the present invention are 100% highly shrinkable polyester fibers, and the fiber properties far exceed those of conventional highly shrinkable fibers, and can become an alternative product to PET.

The invention relates to the technical field of layered composite fabrics, in particular to a flame-retardant-fiber-based multilayer flame-retardant composite fabric for an aircraft cabin and a preparation method of the flame-retardant-fiber-based multilayer flame-retardant composite fabric. The preparation method comprises the following steps: reacting acrylic acid with DOPO to prepare modified DOPO; reacting the epoxy POSS with the modified DOPO to prepare a composite flame retardant; reacting the hydrophilic grafted polyamide with a composite flame retardant and amino-modified nano-montmorillonite to prepare modified polyamide; carrying out melt spinning and chopping on the modified polyamide to obtain flame-retardant fibers; the flame-retardant fibers are spun into flame-retardant yarns, then the flame-retardant yarns are spun into a fabric, and a surface fabric is obtained; the flame-retardant fibers and the polyester fibers are blended to obtain blended yarns, and then the blended yarns are spun into a fabric to obtain a bottom layer fabric; and compounding the surface layer fabric and the bottom layer fabric to obtain the composite fabric. The prepared composite fabric has excellent flame retardant property and antistatic property, and can be applied to aviation cabins.

The present invention relates to the technical field of knitted fabrics, in particular to an antibacterial and anti-ultraviolet bio-based lyocell fabric and a preparation method thereof. The fabric comprises a three-layer composite structure connected by bio-based lyocell yarns: an outer layer is formed by weft-knitting a composite yarn formed by nylon-66 fiber and a first functional fiber, wherein the first functional fiber comprises bio-based lyocell fiber, thermochromic zinc oxide particles, nanosilver / graphene hybrid material, a hydrophobic pore switch polymer, and a cross-linking agent; an intermediate layer is formed by weft-knitting a second yarn formed by a second functional fiber, wherein the second functional fiber comprises bio-based lyocell fiber, temperature-sensitive microcapsules, a humidity-expanding gel, and is composed of an acrylic acid / sodium alginate interpenetrating network; a heat-conducting graphene sheet, and other functional additives; and a third functional fiber in the inner layer comprises bio-based lyocell fiber, Janus-type double-sided microcapsules, a porous graphene framework, a phase change material, and other regulators.

The invention discloses a moisture-absorbing and sweat-guiding polyester fabric and a preparation method thereof, and relates to the technical field of high-performance fiber fabrics. The invention discloses a moisture-absorbing and sweat-guiding polyester fabric which comprises moisture-absorbing and sweat-guiding polyester fibers. The moisture-absorbing and sweat-guiding polyester fiber contains 5-12wt% of cool-feeling particles; the preparation method comprises the following steps: firstly, depositing mesoporous silica on the surface of a base material by using a pretreated mica sheet to obtain modified particles; coating the modified particles with a binary phase change material to obtain core-shell particles; and finally, carrying out hydrophilic treatment on the surfaces of the core-shell particles to obtain the cool-feeling particles. The cool particles are added into polyester, so that the polyester material is endowed with instantaneous cool performance, and the polyester is endowed with moisture absorption and sweat guide performance. The polyester fabric prepared by weaving the moisture-absorbing and sweat-guiding polyester fibers has good wearability.

The invention discloses a moisture-absorbing and quick-drying polyester fabric and a preparation method thereof, and relates to the technical field of fabric fiber materials. The invention relates to a preparation method of a moisture-absorbing and quick-drying polyester fabric. The preparation method comprises the following steps: blending super-moisture-absorbing polyester fibers and spandex fibers to obtain blended yarns; weaving the blended yarn to obtain the moisture-absorbing and quick-drying polyester fabric. The super-moisture-absorption polyester is obtained by melting and cross-linking PET slices and carboxylated three-layer core-shell particles; the carboxylated three-layer core-shell particles are obtained by performing carboxylation treatment on the three-layer core-shell particles by gamma-aminopropyltriethoxysilane and pyromellitic dianhydride; the super-moisture-absorption polyester fiber prepared by the method has water-absorption quick-drying performance, high heat conductivity and certain ultraviolet protection performance, and the polyester fabric prepared by the method is applied to preparation of sun protection clothes and sportswear, so that the wearing comfort and functionality are greatly improved.

The present disclosure relates to a melt-spun high-viscosity PET / low-viscosity PET two-component elastic fiber and a preparation method therefor. The preparation method adopts a six-reactor process. Terephthalic acid and ethylene glycol undergo first and second esterification reactions and first and second prepolymerization reactions, and an obtained ethylene terephthalate prepolymer is respectively introduced into a high-viscosity final polymerization reactor and a low-viscosity final polymerization reactor for polymerization reaction to obtain a high-viscosity melt and a low-viscosity melt, respectively, and then the two melts are spun together. The viscosity of the high-viscosity component can be significantly improved, and a wider range of viscosity difference between the high-viscosity and low-viscosity polyester melts can be obtained. A difference between the intrinsic viscosity of the high-viscosity melt and the intrinsic viscosity of the low-viscosity melt is 0.100-0.550; the prepared PET / PET two-component elastic fiber has high quality and high crimp shrinkage rate.

The invention relates to the technical field of high polymer material processing, and discloses an efficient polyester fiber continuous production method based on multi-screw cooperation, which comprises the following steps: S1, raw material pretreatment and conveying: carrying out multi-stage filtration on a polyester raw material, and simultaneously directly conveying supercritical fluid to a feed port of a multi-screw extruder through a closed pipeline; s2, adding a catalyst: adding an organic metal complex catalyst before the polyester raw material enters a reaction extrusion stage; s3, carrying out multi-screw synergistic reaction; s4, data acquisition and analysis; s5, performing dynamic adjustment and feedback; s6, separating and recycling; and S7, spinning and post-processing. Through cooperation of multiple screws and the supercritical fluid and the catalyst, impurities in the raw materials can be dissolved, the activation energy of the reaction can be reduced, the purity of the raw materials can be improved, the viscosity of the materials can be reduced, the flowability is improved, uniform mixing of the raw materials and the catalyst is promoted, the reaction activity is remarkably enhanced, and a foundation is laid for subsequent efficient polymerization reaction; the quality and the production efficiency of the polyester fibers are improved.

The invention provides a high-molecular hydrolysis-resistant composite carpet as well as a preparation method and application thereof, and belongs to the field of high-molecular carpets. Polyamide 6 is used as a matrix, hydrophobic modification of organic silicon resin and compatibility enhancement of a compatilizer are combined with precise temperature control spinning and stretching puffing processes, balance of hydrophobic and mechanical properties of the fiber is realized, a multi-layer composite structure design is adopted, materials of all layers synergistically exert waterproof, bonding and supporting functions, and optimized tufting, coating and film spraying processes are matched, so that the mechanical property of the fiber is improved, and the mechanical property of the fiber is improved. The carpet is excellent in hydrolysis resistance, wear resistance, weather resistance, color fastness and the like, can adapt to various complex environments, and has practicability and durability.

The utility model relates to a profiled fiber, and relates to the technical field of fibers. The profiled fiber comprises a flat sheet type fiber, and the profiled fiber is prepared from a high polymer melt with high viscosity. According to the profiled fiber, the cross section shape of the fiber is changed, and the specific surface area of the fiber is greatly increased, so that the profiled fiber has a relatively strong cool feeling effect.

A preparation method of the outdoor high-strength polyester fiber with the radiation refrigeration function comprises the following steps that titanium dioxide, silicon dioxide, silicon carbide and zirconium phosphate are blended and ground in proportion and then dispersed in an acetone solution, a dispersing agent is added, and nano-particle dispersion liquid is formed through ultrasonic treatment; mixing the nano-particle dispersion liquid with the polyester chips; feeding the mixed composite material into a screw extruder for melt blending to form a spinning solution; after being accurately metered by a metering pump, the spinning solution is extruded by a spinneret plate to form fiber tows, and the spinneret plate is provided with a slow cooling and heating device; and performing post-treatment on the fiber tows to obtain the high-strength polyester fibers. According to the invention, a specific combination of titanium dioxide, silicon dioxide, silicon carbide and zirconium phosphate is selected, and a specific slow cooling technology and high-power stretching shaping are matched, so that the fiber has excellent radiation refrigeration performance and mechanical strength, and can be widely applied to the fields of outdoor clothing, awning cloth, car clothing and the like.