1566 results about "Melt spinning" patented technology

The invention relates to the field of functional master batch materials, in particular to a phase-change energy temperature-adjusting fiber master batch and a fat-burning fabric thereof. The phase-change energy temperature-regulating fiber master batch is prepared from a composite phase-change material and polyethylene glycol terephthalate slices through melt extrusion and granulation, the fat-burning fabric is prepared from the phase-change energy temperature-adjusting fiber master batch and polyethylene glycol terephthalate slices through melt spinning, network compounding and weaving processing. By introducing the microencapsulated phase-change material and the high-thermal-conductivity filler, in the melt extrusion process, the microencapsulated phase-change material and the high-thermal-conductivity filler can be uniformly dispersed in the matrix material to form stable fiber master batches, form an efficient thermal-conductivity structure and provide excellent thermal regulation performance; meanwhile, microencapsulation can improve the stability and dispersity of the phase-change material, and the fat-burning fabric is prepared through melt spinning and weaving of fiber master batches, so that the heat-conducting property of the product is improved, and the continuous fat-burning effect is achieved.

The invention relates to the technical field of textiles, and discloses a cool and washable bio-based nylon 56 fabric and a preparation method thereof. The preparation method of the cool and washable bio-based nylon 56 fabric comprises the following steps: loading modified nano aluminum oxide on modified aluminum nitride microchips to obtain a composite cool material; nylon 56, an ethylene-methyl acrylate-glycidyl methacrylate terpolymer, polypentamethylene guanidine hydrochloride and a composite cool feeling material are subjected to blending extrusion and melt spinning, and then the bio-based nylon 56 fabric is woven. Mixing the composite modified boron nitride and ethanol to obtain finishing liquid; spraying the finishing liquid on one side of the bio-based nylon 56 fabric, and drying to obtain the cool washable bio-based nylon 56 fabric. The cool and washable bio-based nylon 56 fabric disclosed by the invention has excellent cool feeling, antibacterial property, washable property, moisture absorption property and unidirectional perspiration property.

Provided in the present invention are an optical aluminum alloy and a preparation method therefor. The preparation method comprises: step S1, preparing an aluminum alloy starting ingot from raw materials by using a semi-continuous casting process, the semi-continuous casting process comprising heating and melting, alloying, refining, slagging-off, standing, degassing, filtering and semi-continuous water-cooled casting; step S2, performing homogenization, end cropping and skinning on the aluminum alloy starting ingot, so as to obtain a surface-treated alloy raw material; step S3, carrying out rapid solidification treatment on the surface-treated alloy raw material by means of a melt spinning method to obtain a rapidly solidified alloy strip; step S4, subjecting the rapidly solidified alloy strip to crushing treatment, and then performing encapsulation and cold pressing to obtain a cold-pressed billet; step S5, subjecting the cold-pressed billet to one to two passes of a hot extrusion process to prepare a bar stock; and step S6, carrying out solution treatment and aging treatment on the bar stock to obtain a finished aluminum alloy material. The method can refine the grain structure, and the prepared material can be machined into highly flat surfaces.

The invention relates to the technical field of polyester fibers, in particular to a high-strength wear-resistant polyester fiber and a preparation method thereof. The invention aims to solve the problem that the mechanical strength and wear resistance of the existing polyester fiber are difficult to consider at the same time. The preparation method comprises the following steps: carrying out esterification and polycondensation on terephthalic acid, ethylene glycol, hydroxyl-terminated polydimethylsiloxane and isophthalic acid to obtain modified PET; the preparation method comprises the following steps: respectively carrying out oxidation treatment on graphene and a multi-walled carbon nanotube, and then adding polyether amine for grafting; carrying out melt blending with PET slices to obtain nano master batches; carrying out melt blending on the chopped glass fibers and the PET slices to prepare micron master batches; and mixing the modified PET, the nano master batch and the micron master batch, carrying out ultrasonic dispersion, adding an auxiliary agent, and carrying out melt spinning, three-section stretching and three-section heat setting treatment to obtain the high-strength wear-resistant polyester fiber. Through the synergistic effect of the components and the process, the prepared fiber has excellent mechanical properties and wear resistance, and has wide application prospects in the fields of clothing, home textiles, industry and the like.

The invention relates to the field of textile materials, and particularly discloses a graphene enhanced polyester yarn and a preparation method thereof.The preparation method comprises the following steps that silicon dioxide aerogel serves as a porous carrier to be loaded with graphene, and a graphene-porous carrier composite material is prepared; the graphene-porous carrier composite material is subjected to modification treatment through vinyl trimethoxy silane and 3-amino propyl triethoxy silane, and then a modified graphene composite material is prepared; reacting the modified graphene composite material, a styrene monomer, an acrylate monomer and an initiator to prepare modified graphene; mixing the prepared modified graphene with polyester chips, and then carrying out melt spinning to prepare graphene enhanced polyester yarns; the invention further discloses the graphene enhanced polyester yarn prepared by adopting the preparation method. The preparation method has the characteristics that the dispersion of the graphene in the polyester is improved, and the direct interface compatibility of the graphene and the polyester fiber is improved, so that the mechanical property of the polyester yarn is improved.

The invention discloses a flame-retardant high-temperature-resistant fiber and a preparation method thereof, and relates to the technical field of fibers. When the flame-retardant high-temperature-resistant fiber is prepared, 1, 6-hexamethylenediamine, 1, 6-adipic acid, tetrahydrodifuran [3, 4-B: 3 ', 4'-D] furantetraone and a phosphorus-sulfur composite flame retardant are copolymerized to generate a polyamide-polyamide acid solution; 4-aminopyridine and the polyamide-polyamide acid solution are subjected to a reaction, and modified polyamide is prepared; the modified polyamide is subjected to melt spinning, and polyamide fibers are prepared; the preparation method comprises the following steps: pretreating nano titanium dioxide by using 4-bromobutyl trimethoxy silane to prepare modified nano titanium dioxide; mixing the modified nano titanium dioxide and ethanol to prepare a light-resistant antibacterial finishing agent; and carrying out post-treatment on the polyamide fiber by using an anti-light antibacterial finishing agent to prepare the flame-retardant and high-temperature-resistant fiber. The prepared fiber is excellent in comprehensive performance, particularly outstanding in flame retardance and high temperature resistance, and suitable for the fields of special protective clothing, high-temperature filtering materials and the like.

The invention discloses an ultra-high molecular weight polyethylene fiber melt spinning method which comprises the following steps: step 1, mixing ultra-high molecular weight polyethylene resin with polyethylene wax and high-density polyethylene to form a composition; 2, melting the composition at a high temperature to form a melt, carrying out melt spinning, and carrying out nozzle stretching and air cooling to obtain nascent fibers; and step 3, carrying out hot stretching and heat setting on the nascent fiber to obtain the final ultra-high molecular weight polyethylene fiber. By adopting the technical scheme, the melt flowability of the ultra-high molecular weight polyethylene can be greatly improved by the high-density polyethylene and the polyethylene wax, so that the ultra-high molecular weight polyethylene resin can be smoothly subjected to melt spinning. Meanwhile, in the hot stretching process, the polyethylene wax can participate in the crystallization process of the ultra-high molecular weight polyethylene resin and the high-density polyethylene, and finally the mechanical property of the ultra-high molecular weight polyethylene fiber can be well maintained.

The invention relates to the technical field of high-performance polyester, in particular to a high-strength low-shrinkage polyester fiber and a preparation method thereof. The defects that existing polyester fibers are poor in strength and shrinkage resistance are overcome. The preparation method comprises the following steps: mixing the modified resin, the modified nano silicon dioxide, the composite antioxidant, the composite nucleating agent and the composite lubricant, and carrying out melt spinning. Wherein the modified resin is prepared from the following raw materials: dimethyl terephthalate, isophthalic acid, ethylene glycol and isosorbide; the modified nano silicon dioxide comprises nano silicon dioxide, KH570 and silver nitrate; the composite antioxidant comprises an antioxidant 1010, an antioxidant 168 and an antioxidant 1222; the composite nucleating agent comprises sodium benzoate and nano montmorillonite; the composite lubricant is prepared from ethylene bis stearamide and pentaerythritol stearate. The prepared polyester fiber is high in strength, high in shrinkage resistance and suitable for manufacturing of outdoor equipment.

The invention relates to a degradable filter element and a preparation method thereof, and belongs to the technical field of PLA filter elements. The degradable filter element is arranged between an atomizing element shell and a metal heating wire, a plurality of capillary holes are formed in the degradable filter element and used for being filled with tobacco tar, and the degradable filter element is prepared from a degradable composite material through melt spinning. The degradable composite material comprises the following components: polylactic acid and modified silicon dioxide, wherein the modified silicon dioxide is prepared by taking nano silicon dioxide, a silane coupling agent, ferulic acid, amino acid and copper chloride as raw materials, the silicon dioxide is organically modified, so that the dispersity of the silicon dioxide in a polylactic acid system is improved, the interface binding force of the silicon dioxide is improved, and the mechanical property of a polylactic acid material is improved; various antibacterial components are introduced, so that the antibacterial property of the polylactic acid material can be effectively improved.

The invention discloses a preparation method of a composite phase-change temperature-adjusting organic fiber membrane with a flexible core-shell structure, and belongs to the field of intelligent textile materials.The preparation method comprises the following steps that polyacrylonitrile (PAN) serves as a sheath layer material, n-octadecane serves as a core layer phase-change material, and the composite phase-change fiber membrane is prepared through a melt spinning method and a coaxial electrostatic spinning technology. According to the invention, the fiber membrane with high melting enthalpy value (171.6 J / g), excellent thermal stability (the latent heat is still 117.7 J / g after 100 times of heating-cooling circulation) and excellent mechanical properties (the tensile strength is 2.418 MPa, the tensile yield stress is 2.331 MPa, the tensile strain at break is 36.5%, and the elastic modulus is 58.226 MPa) can be prepared; a new thought is provided for preparing intelligent textiles with good flexibility and efficient heat management capability.

The invention relates to the technical field of synthetic fibers, in particular to a high-elasticity textile fiber and a preparation process thereof. The high-elasticity textile fiber is prepared from the polyurethane-polyamide elastomer and the modified diatomite master batch through melt spinning, drafting and winding. According to the invention, hydroxyl-terminated polydimethylsiloxane is used as polyol, and the molar ratio of the polyurethane prepolymer to the polyamide prepolymer is controlled, so that the prepared polyamide-polyurethane elastomer slice has good heat resistance; the molar ratio of isocyanate to polyol and the molar mass ratio of caprolactam to adipic acid are controlled, so that the prepared textile fiber is excellent in mechanical property; 2, 2-dimethylolpropionic acid is used for a chain extension reaction, the molar ratio is controlled, the moisture regain of the prepared textile fiber is 8.58%, and the moisture absorption is high; the diatomite is modified by the quaternary ammonium salt compound, and the addition proportion is adjusted, so that the prepared spinning fiber has good antibacterial performance.

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 relates to the technical field of multi-layer composite fabrics, and discloses a moisture-absorption antibacterial layered composite fabric and a preparation method thereof. The preparation method comprises the following steps: carrying out melt spinning on polyamide and an antibacterial agent to prepare the antibacterial polyamide fiber; blending antibacterial polyamide fibers, cotton fibers and special-shaped section polyamide fibers, and knitting to obtain a lining fabric crude product; blending the antibacterial polyamide fiber and the modified cotton fiber, and knitting to obtain a surface fabric crude product; respectively padding the surface fabric crude product and the lining fabric crude product in the finishing liquid to obtain a surface fabric and a lining fabric, and compounding the surface fabric and the lining fabric to obtain the moisture-absorbing antibacterial layered composite fabric. The composite fabric has excellent antibacterial performance and good moisture absorption performance.

The invention belongs to the technical field of flame-retardant fibers, and discloses a colored flame-retardant master batch and a preparation method of colored flame-retardant fibers.The preparation method of the colored flame-retardant master batch comprises the steps that a flame retardant PDI-MA and a polyester chip powder matrix are blended, extruded and granulated, and the colored flame-retardant master batch is prepared; the preparation method of the colored flame-retardant fiber comprises the following steps: blending the prepared colored flame-retardant master batch and polyester chips, and carrying out melt spinning to obtain the colored flame-retardant polyester fiber. The pigment and the flame retardant in the flame retardant PDI-MA prepared by the invention are carriers for each other, and the advantages of MA and PTCDA are combined, so that the colored flame-retardant polyester fiber prepared from the flame retardant PDI-MA has colored and flame-retardant properties, and the overall flame retardance is improved synergistically.

The invention relates to the technical field of fibers, and discloses an antibacterial and antistatic fiber material based on silver ions and halamine and a preparation method of the antibacterial and antistatic fiber material. The preparation method comprises the following steps: loading a methyl methacrylate-based polymer on the surface of a silver-loaded molecular sieve through an in-situ polymerization method, and grafting a halamine antibacterial monomer chlorinated piperidinol through an ester exchange reaction to obtain an antibacterial agent; the preparation method comprises the following steps: carrying out reaction polymerization on caprolactam, quaternized polyether, polyethylene glycol, 2, 6-dipicolinic acid and adipic acid to obtain an antistatic agent; an antibacterial agent, an antistatic agent and nano-silver are added into chemical fiber slices, the antibacterial and antistatic fiber material based on silver ions and halamine is prepared after melt spinning, and the chemical fiber slices are polyester slices or chinlon slices or polypropylene slices. The fiber material has excellent antibacterial and antistatic properties.

The invention discloses a warm-keeping fabric containing hollow polyester fibers as well as a preparation method and application thereof, and relates to the field of fabrics. When the thermal fabric containing the hollow polyester fibers is prepared, hollow mesoporous nano cerium oxide is selectively protected by molten paraffin and then reacts with chloromethyl trimethoxy silane and isocyanuric acid in sequence, paraffin is dissolved by chloroform, and then N-(3-trimethoxysilylpropyl) pyrrole is grafted to obtain modified hollow mesoporous nano cerium oxide; reacting terephthalic acid, a multifunctional monomer and ethylene glycol to obtain modified polyester particles; the preparation method comprises the following steps: granulating modified polyester, uniformly mixing modified hollow mesoporous nano cerium oxide and polyethylene glycol 10000, performing melt spinning, treating with a pyrrole solution, twisting, spinning and weaving, and treating with a sodium hypochlorite mixed solution to obtain the thermal fabric containing the hollow polyester fibers. The warm-keeping fabric containing the hollow polyester fibers prepared by the invention has excellent warm-keeping, antibacterial, anti-aging, flame-retardant, antistatic and mechanical properties.

The invention relates to polyethylene resin for melt spinning as well as preparation and application thereof, a preparation method of the polyethylene resin comprises the following steps: (1) adding raw materials including a main catalyst, a cocatalyst, a diluent and ethylene into a reactor, and carrying out polymerization reaction to obtain a slurry blend containing the resin and the diluent; (2) carrying out washing treatment on the slurry-like blend through a purified diluent in the discharging process, and then carrying out solid-liquid separation; and (3) drying the resin subjected to solid-liquid separation to obtain a polyethylene resin product. Compared with the prior art, the polyethylene resin prepared by the invention has the characteristics of low crystal point and difficulty in wire breakage during subsequent spinning, and can be directly stretched and oriented in a hot channel at an outlet of a spinneret plate to obtain a final fiber product, or the fiber product can be further obtained through multi-stage stretching of a hot roller on the basis; the strength of a fiber product can be higher than that of a fiber product of 15cN / dtex, and the melt spinning efficiency of the high-performance fiber is further improved.

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 discloses an antibacterial and deodorant blended fabric, a preparation method thereof and application of the antibacterial and deodorant blended fabric in underwear, and relates to the technical field of fabrics. When the antibacterial and deodorant blended fabric is prepared, firstly, indolyl polyester is subjected to melt spinning to be prepared into fibers; the preparation method comprises the following steps: reacting fibers, indole and indole-6-formaldehyde, reacting with 4-(aminomethyl)-2, 6-di-tert-butylphenol, and reducing to obtain modified polyester fibers; secondly, the pretreated bamboo fibers react with carbon disulfide and potassium hydroxide; the preparation method comprises the following steps: oxidizing a modified bamboo fiber precursor obtained by reacting the modified bamboo fiber with 1-(2-propenyl)-1, 3, 5-triazine-2, 4, 6 (1H, 3H, 5H)-triketone to obtain a modified bamboo fiber, and oxidizing the modified bamboo fiber precursor to obtain the modified bamboo fiber; the modified polyester fibers and the modified bamboo fibers are blended and woven to obtain fabric, and then the fabric is finished through a finishing agent to obtain the antibacterial and deodorant blended fabric. The antibacterial and deodorant blended fabric prepared by the invention has good antistatic, antibacterial and durable properties.

The invention belongs to the field of functional textile materials, and provides a cool-feeling anti-ultraviolet nylon fabric and a preparation method thereof, and the cool-feeling anti-ultraviolet nylon fabric adopts a design scheme of combining a boron nitride / titanium dioxide composite filler with a beta-hydroxyl ether type ultraviolet absorption silane coupling agent surface modification technology. Uniform loading of hexagonal boron nitride on the surface of anatase type titanium dioxide is realized through an in-situ heat treatment process, a composite structure with heat conduction and ultraviolet shielding functions is constructed, and a complete process flow of master batch preparation, melt spinning, weaving, after-treatment and the like is matched; the ultraviolet protection coefficient UPF of the fabric is not lower than 40, the UPF retention rate after 20 times of household washing cycles is not lower than 80%, and the cool feeling qmax at the contact moment is not lower than 0.20 W / cm, the technical problem that an existing nylon fabric is insufficient in ultraviolet resistance and cool feeling function is solved, and the fabric has wide industrial application value.

The invention relates to a multistage composite micro-nano particle with wide spectrum regulation and control performance and preparation and application thereof, the product comprises an inner core particle, an intermediate layer particle and an outer layer organic matter, the intermediate layer particle uniformly grows on the surface of the inner core particle and is coated by the outer layer organic matter; the preparation method comprises the following steps: firstly, pretreating the surfaces of inner core particles, then adding the pretreated inner core particles into a silane coupling agent solution for modification treatment to obtain silane coupling agent modified inner core particles, and finally forming intermediate layer nano-particles on the surfaces of the inner core particles by adopting a sol-gel method, a coprecipitation method, a hydrothermal method or an impregnation method to obtain the product. During application, the product and polymer master batches are uniformly mixed and dried, and then the fiber with the radiation refrigeration characteristic is prepared through a melt spinning process. The method is simple, and the product has a good radiation refrigeration effect; during application, the prepared fiber with the radiation refrigeration characteristic has the effects of dual regulation and control of solar radiation resistance and human body radiation refrigeration.

The invention discloses a method for preparing flame-retardant and wear-resistant fibers for fireproof clothing by using regenerated polyester fibers, and belongs to the technical field of fiber processing, and the method specifically comprises the following steps: mixing polyester alcoholysate, a siloxane-based modifier, a catalyst and an additive, and carrying out condensation polymerization for 3-5 hours, namely modifying the polyester alcoholysate by using the siloxane-based modifier, and adding the additive into the polyester alcoholysate to obtain the flame-retardant and wear-resistant fibers for fireproof clothing. Regenerated polyester fibers with rigid frameworks and flexible networks are prepared through melt spinning and hot drafting, and then surface enhancement protection is performed through polypyrrole, so that the mechanical strength of the wear-resistant and flame-retardant fibers is effectively improved, and the wear resistance and flame retardance of the wear-resistant and flame-retardant fibers are also improved; and the composite material can be more easily applied to special fields such as fireproof suits.

The invention belongs to the technical field of flame-retardant polyester fibers, and discloses a flame-retardant anti-dripping colored polyester fiber preparation method, which comprises: blending a flame retardant PDI-MAC and a polyester chip powder matrix, and carrying out extrusion granulation to obtain a PET colored flame-retardant anti-dripping master batch; and blending the PET colored flame-retardant anti-dripping master batch with polyester chips, and carrying out melt spinning to obtain the flame-retardant anti-dripping colored polyester fiber. According to the invention, the MAC and the PDI are combined, so that the prepared flame retardant PDI-MAC has flame-retardant and anti-dripping effects and also has a color developing effect, the production procedures are reduced, the cost is reduced, and the problems caused by multi-step addition in the prior art are avoided.

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.

A method for preparing a cationic dyeable flame-retardant high-strength polyester fiber is provided, after mixing oligomer A, oligomer B, and ethylene terephthalate and carrying out a polycondensation reaction to obtain a cationic dyeable flame-retardant polyester masterbatch, adding the cationic dyeable flame-retardant polyester masterbatch to the polyester chips according to a certain ratio for melt spinning, to prepare the cationic dyeable flame-retardant high-strength polyester fiber; oligomer A is prepared by the esterification reaction of a phosphorus flame retardant and a diol; oligomer B is prepared by the esterification reaction of sodium isophthalate sulfonate and a diol; the ratio of the sum of the molar weight of oligomer A and oligomer B to the molar weight of ethylene terephthalate is 3:7-6:4. The preparation method is simple, and the cationic dyeable flame-retardant high-strength polyester fiber has excellent mechanical properties, and can be used in automobiles, ships, and the interior decoration of high-class hotels.

The invention relates to the technical field of high-performance polyester fibers, particularly belongs to the patent classification number D01F6 / 00, and discloses a high-moisture-permeability polyester fiber and a preparation method thereof. Comprising the following steps: carrying out hydrothermal reaction on magnesium nitrate hexahydrate and aluminum nitrate nonahydrate to prepare layered double hydroxide nanosheets; then, sodium alginate is prepared into a solution, and the solution is cross-linked with calcium chloride to obtain alginic acid aerogel powder; then, carrying out ultrasonic oscillation dispersion on the two substances in deionized water, and cooling and drying to obtain composite aerogel; then, the composite aerogel and polyethylene glycol 4000 are subjected to melt blending and granulation in a double-screw extruder, and functional master batches are obtained; and finally, mixing the functional master batch with polyethylene glycol terephthalate slices, performing melt spinning at a specific spinning temperature and speed, and performing cooling forming and drafting to obtain the high-moisture-permeability polyester fiber. According to the method, through material compounding and process control, the moisture permeability of the polyester fiber is effectively improved, and the method has a good application prospect in the textile field.

The invention discloses a melt spinning cooling system which comprises a spinning box, a cooling cylinder section, a first heating assembly, a second heating unit and a recovery part, the first heating assembly outputs trace hot nitrogen, anti-oxidation protection of melt trickles is achieved, the oxidation risk possibly caused by direct contact of a traditional cooling medium is avoided, and the cooling efficiency is improved. Meanwhile, the second heating unit is matched to regulate and control the temperature of the cooling cylinder section, so that the whole-process temperature accurate control from oxidation prevention to high-temperature natural cooling and the high-temperature natural cooling and cold air supply-free operation process are realized, and the solidification orientation length and process of the melt trickle can be actively lengthened by combining gradient process temperature control; different from the defect of insufficient orientation caused by too fast cooling in the prior art, key conditions are provided for optimization of a fiber orientation structure; due to the coaxially stacked cooling cylinder sections and nitrogen recovery operation, a stable cooling environment is constructed, fiber shaking is avoided, the nitrogen utilization rate and the environmental safety are improved, and the process stability and economical efficiency are balanced.

The invention belongs to the technical field of high polymer materials, and particularly relates to a high-strength papermaking forming net fiber. Comprising the following raw materials in parts by weight: 75-90 parts of polyethylene glycol terephthalate, 5-15 parts of polybutylene terephthalate, 3-10 parts of a modified fiber filler, 2-5 parts of modified graphene, 2-8 parts of silicon dioxide, 0.5-2 parts of a silane coupling agent KH-560, 1-3 parts of an anti-hydrolysis agent, 0.5-1.5 parts of an antioxidant and 0.3-1 part of a lubricant. Wherein the modified fiber filler is prepared by sequentially carrying out modification processes such as silane coupling agent, citric acid-glycerol esterification, iron bismuth oxide loading and the like on glass fibers; the modified graphene is prepared by introducing dopamine, cerium ions and glycidyl methacrylate for modification. The mechanical strength, the hydrolysis resistance and the wear resistance of the fiber are remarkably improved through the synergistic effect of all the components and the melt spinning-multi-stage stretching process, and the fiber is particularly suitable for a forming net of a high-speed paper machine.

The invention relates to the technical field of high-performance fibers, in particular to a high-performance fiber containing carbon nanotubes and a preparation method of the high-performance fiber. The preparation method comprises the following steps: adding ammonium polyphosphate, alkylphenol polyoxyethylene ether and tetraethyl orthosilicate to obtain a silicon-coated ammonium polyphosphate material; then adding a silicon-coated ammonium polyphosphate material and gamma-aminopropyltriethoxysilane, so as to obtain a modified silicon-coated ammonium polyphosphate material; and mixing the modified silicon-coated ammonium polyphosphate material, tannic acid and a buffer solution to obtain the double-layer coated ammonium polyphosphate material. The fiber is obtained by adding a carbon nanotube material, a double-layer coated ammonium polyphosphate material, polytrimethylene terephthalate, a compatilizer and polypropylene and carrying out melt spinning. And then the fibers are sequentially soaked in an ethylenediamine solution, a polyglutamic acid solution and a chitosan solution, and the high-performance fibers are obtained. The obtained high-performance fiber has good flame retardance and antibacterial property, so that the high-performance fiber has a wide application prospect in the technical field of high-performance fibers.