121results about How to "Improve spinnability" patented technology

The invention discloses a phase change energy storage waterborne polyurethane nanofiber membrane and a preparation method thereof. Lignin-based phase change microcapsules are prepared by combining ultraviolet crosslinking with lignin shell packaging, and then the nanofiber membrane containing the phase change microcapsules is prepared through an electrostatic spinning technology. And finally, constructing the waterborne polyurethane phase change fiber membrane with asymmetric wettability through a low-temperature plasma technology. According to the invention, lignin is self-assembled to form nanoparticles, and ultraviolet light induces free radical polymerization to form a polymer film, so that the packaging capability of the phase change material is improved. The phase change microcapsule prepared by the method is high in packaging efficiency and excellent in phase change performance, the preparation process is green and environment-friendly, the technological operation is simple, the temperature of the prepared phase change energy storage waterborne polyurethane nanofiber membrane conforms to the comfortable temperature range of a human body, and the phase change energy storage waterborne polyurethane nanofiber membrane has excellent temperature regulation, waterproof and moisture permeable performance and is suitable for being used in the field of water treatment. Good application prospects are realized in the field of functional textiles with functions of intelligent temperature regulation, water resistance and air permeability and the like.

The invention belongs to the technical field of fiber modification, and particularly relates to a preparation method of degradable biomass high-water-absorption short fibers. According to the invention, cellulose short fibers such as plant fibers, regenerated cellulose fibers and the like are used as raw materials, and the degradable biomass short fibers with high water absorption performance are prepared through the technological processes of pre-humidification, cake making, hanging into a reaction tank, alkalization, etherification, neutralization, washing, oiling, wet feeding, wet splitting, drying, metering, packaging and the like. The water absorption rate of the obtained degradable biomass high-water-absorption short fiber is 60 to 100g / g, and the fineness of the degradable biomass high-water-absorption short fiber is 1.29 to 10.0 dtex. The fiber can meet the use requirements in the fields of hygienic personal care products, blood-absorbing cotton medical dressings, surgical pads, dirt treatment bags, water-blocking yarns and water-blocking tapes, agriculture, forestry, landscaping, desert greening, oil exploitation and the like, is an environment-friendly and renewable non-petrochemical functional material, is green and environment-friendly, and has a very wide application prospect.

The invention discloses a phase change fiber membrane with a composite core-sheath structure and a preparation method and application thereof.The method comprises the steps that polyacrylonitrile is dissolved in N 'N-dimethylformamide and stirred to be completely dissolved, then hydroxylated boron nitride is added, the hydroxylated boron nitride is evenly dispersed through ultrasonic treatment, and a sheath spinning precursor solution is prepared; dissolving polyethylene glycol in N 'N-dimethylformamide, stirring to melt the polyethylene glycol, and taking the polyethylene glycol as a core layer spinning precursor solution; preparing a phase change fiber membrane with a core-sheath structure from the sheath spinning precursor solution and the core spinning precursor solution through a coaxial electrostatic spinning process; and placing the phase change fiber membrane with the core-sheath structure in an ethanol dispersion liquid of hydroxylated boron nitride, carrying out ultrasonic dip-coating, and then carrying out cold pressing treatment to prepare the phase change fiber membrane with the composite core-sheath structure. The obtained composite core-sheath structure phase change fiber membrane has good latent heat property, thermal conductivity and flexibility, and meanwhile, leakage of the phase change material is prevented through the core-sheath structure.

The invention discloses a high-temperature-resistant liquid crystal polyarylester and a preparation method thereof, the liquid crystal polyarylester is formed by polymerizing monomers, and the monomers are composed of p-hydroxybenzoic acid HBA, 4, 4 '-biphenol BP, terephthalic acid TA, 2, 6-naphthalic acid NDA and 9, 9-bis [4-(4-methoxycarbonyl phenoxy) phenyl] fluorene; the corresponding molar ratio of the monomers is (50-60): (20-25): (5-10): (10-15): (1-5), and the sum of the molar ratios of the monomers is 100. By adding a small amount of 2, 6-naphthalic acid, the melting point Tm of LCP is reduced, the processing temperature window is widened, and processing is facilitated; by adding a small amount of bisphenol fluorene containing ether bonds, the toughness and processability of the LCP are improved while the glass-transition temperature Tg of the LCP is improved.

The invention discloses a high-performance polyacrylonitrile-based carbon fiber and a preparation method thereof, and the preparation method comprises the following steps: proportionally mixing polyacrylonitrile, a solvent and a plasticizer, heating and stirring to obtain a uniform spinning solution; the plasticizer is diphenyl phthalate, bisphenol A-bis (diphenyl) phosphate ester or resorcinol bis (diphenyl) phosphate ester; spinning the spinning solution to prepare a polyacrylonitrile fiber precursor; carrying out hot drawing treatment on the polyacrylonitrile fiber precursor, and then carrying out pre-oxidation and carbonization treatment to obtain polyacrylonitrile-based carbon fibers; the pre-oxidation temperature ranges from 200 DEG C to 300 DEG C, and the pre-oxidation time ranges from 80 min to 160 min. The preparation method of the carbon fiber can effectively improve the spinnability and the draftability of the PAN fiber, and can promote the crystallinity and the graphitization degree of the carbon fiber to be improved, so that the mechanical property of the fiber is enhanced.

The invention belongs to the technical field of polycarbosilane, and particularly relates to a synthesis method of polydimethylsilane and application of the polydimethylsilane in preparation of polycarbosilane. In the Wurtz polymerization reaction of polydimethylsilane, polar solvents such as crown ether, diethylene glycol dimethyl ether, hexamethylphosphoric triamide and polyether are added into a reaction system, and the polar solvents have a complexing effect on sodium ions, so that tight ion pairs can be promoted to become loose ion pairs, the concentration of active anions is greatly increased, and the reaction time is shortened; therefore, the initiation period of the reaction is shortened, the polymerization reaction speed is accelerated, the molecular weight of polydimethylsilane is improved, and the yield is improved; the molecular weight of the polydimethylsilane is increased, the pyrolysis activation energy of the polydimethylsilane is gradually reduced, and the prepared polycarbosilane has higher Si-H bonds, and is high in A-grade conversion rate and good in spinning performance; according to the method, original reaction equipment does not need to be changed, reaction process parameters are also in original design, and the method has practical application value.

The invention provides a preparation method of antibacterial degradable fibers. The preparation method comprises the following steps: adding chitosan and citric acid into a polyethylene glycol solution, and uniformly stirring to obtain an antibacterial polyvinyl alcohol solution; the preparation method comprises the following steps: mixing polylactic acid, chitosan, super-antibacterial polyvinyl alcohol 1, a compatilizer polyvinyl alcohol grafted modified poly-L-lactic acid and polycaprolactone, an antioxidant and a lubricant in a high-speed mixer to obtain a material 1; adding the material 1 into a parallel double-screw extruder from a main feeding hole, and granulating to obtain a granular material 2; performing vacuum drying on the material 2 to obtain a material 3; and putting the material 3 into a screw type spinning machine for melt spinning to obtain the antibacterial degradable fiber. The antibacterial functional components chitosan and polyvinyl alcohol are well combined with a water-soluble degradable fiber base material, so that good functionality, spinnability and mechanical strength are achieved at the same time. The prepared material has the characteristics of high antibacterial property, wide antibacterial spectrum, low cost, environment friendliness and the like, and has a good market application prospect.

The invention belongs to the field of chemical fibers, and particularly relates to a method for preparing polyester industrial filaments by using recycled polyester chips recycled from bottles and the prepared polyester industrial filaments, regenerated PET chips with the viscosity of 0.65-0.8 dl / g and the filtration value of 0-5 MPa are selected, 1.0-1.3 dl / g regenerated high-viscosity chips are obtained after tackifying, and spinning is carried out on an existing industrial filament production line; the temperature of a screw is controlled to be 280-330 DEG C, and the lengths of a feeding section and a metering section are adjusted, so that the slices are fully melted, meanwhile, it is ensured that a large amount of melt is not degraded due to the fact that the melt contains IPA, and the stability of the outlet pressure of the screw is ensured; a spinning assembly adopts a multi-layer metal filter screen structure of 5-30 [mu] m, so that the problem that the spinning assembly is quickly boosted due to many impurities of regenerated slices is solved; and the stretching and setting conditions are optimized and adjusted, so that the physical property, broken filaments and spinnability can meet the requirements.

The invention discloses a preparation method of a flame-retardant viscose fiber with an antibacterial function, which comprises the following steps: (1) under sufficient stirring, sequentially adding a phosphorus flame retardant, a dispersant and graphene oxide into deionized water with an alkaline pH value, and stirring and ball-milling to obtain a flame retardant dispersion liquid; (2) preparing a spinning stock solution by taking cellulose pulp as a raw material, and adding the flame retardant dispersion liquid into the spinning stock solution by adopting a pre-spinning injection method to prepare a blended spinning stock solution; (3) spinning the blended spinning stock solution in a coagulating bath, and reducing the blended spinning stock solution in an oxidation-reduction bath to obtain a formed tow; and after drafting, carrying out a post-treatment process to obtain the flame-retardant viscose fiber with the antibacterial function. The production process is optimized from multiple aspects such as selection of raw materials for preparing the flame retardant, oxidation reduction and the like, and the prepared flame-retardant viscose fiber has excellent flame retardance, good physical and mechanical properties and antibacterial properties and good wearability.

The present invention belongs to the technical field of polyamide fibers, and specifically relates to a polyamide material for industrial silk, a preparation method thereof, and fibers. The modified polyamide provided by the present invention has a structure shown in Formula I: wherein Q is a semi-aromatic amide structural unit, R is a phosphorus-containing semi-aromatic amide structural unit, S is an aliphatic amide structural unit, and P is a polyamide structural unit; a is 3 to 6, b is 1 to 3, c is 2 to 5, and d is 110 to 240. The present invention introduces aromatic ring structure, phosphorus-containing group and flexible chain segment into polyamide molecular chain through copolymerization, utilizes rigid benzene ring structure and phosphorus-containing flame retardant structure to reduce hydrogen bonding between polyamide molecular chains, increases the proportion of amorphous region of modified polyamide, utilizes long-chain polyamide flexible chain segment to improve the softness and activity of modified polyamide, and at the same time, the side group phosphorus-containing aromatic ring structure also improves the flame retardant performance of modified polyamide.

The invention is applicable to the technical field of spinning, and provides an implantable multichannel multilayer staple fiber covering yarn, the covering yarn is of an n-layer coated composite yarn structure, n is greater than or equal to 3, the inner layer of the composite yarn structure is a supporting staple fiber material, the middle layer of the composite yarn structure is a functional fiber raw material, and the outer layer of the composite yarn structure is a skin-friendly functional fiber raw material. The invention further provides a spinning method of the implantable multi-channel multi-layer staple fiber covering yarn. The multi-channel feeding function of different spinning procedures is fully exerted, stable composite yarn structures such as a multilayer sandwich structure and a four-layer sandwich structure are formed, the limitation of a single-layer or double-layer structure of the existing short fiber core-spun yarn is broken through, the yarn structure can realize the coating effect of multiple layers of short fibers inside and outside, and the yarn structure has the advantages of being simple in structure and convenient to use. The structure that various fibers in traditional yarn are mutually crossed and disordered is broken through, the mode of self-use combination and distribution of various fibers is achieved, superposition and free combination of various functions of the yarn are achieved, and extremely high commercial value and market application prospects are achieved.

The invention discloses a SiC-ZrC complex-phase continuous ceramic fiber and a preparation method of the SiC-ZrC complex-phase continuous ceramic fiber. The preparation method comprises the following steps: cracking polydimethylsiloxane to obtain a mixed product, mixing the mixed product with an organic metal reagent for thermal polymerization, cooling to obtain a head product, dissolving the head product, filtering, and carrying out reduced pressure distillation to obtain a precursor; adding the precursor into a spinning cylinder, heating for standing and defoaming, and then cooling for melt spinning to obtain a fibril; putting the fibril into a tubular furnace for heating, and meanwhile, introducing boron trichloride for curing to obtain a cross-linked filament; and putting the cross-linked wire into a tubular furnace, reacting according to a heating program, preserving heat, cooling to obtain an initial fiber, and heating in a sintering furnace to obtain the ceramic fiber. The prepared precursor is controllable in softening point, uniform in molecular weight distribution and excellent in spinning performance, boron is introduced in the non-melting process, and the fiber density and the high-temperature oxidation resistance of the fiber are greatly improved.

The invention discloses a low-twist manufacturing process of a PPS woven fabric. The low-twist manufacturing process comprises the following steps: step S1, pretreating PPS fibers; s2, fiber drawing and roving preparation; s3, spun yarn preparation and low twist treatment; step S4, weaving and post-processing; according to the low-twist manufacturing process for the PPS woven fabric, the quality of the PPS woven fabric can be remarkably improved, low twist, high strength and excellent hand feeling are achieved, the softness and air permeability of the fabric are improved, meanwhile, the production efficiency is improved, and the production cost is reduced; naOH aqueous solution soaking and washing in the pretreatment step can effectively remove impurities and grease on the surface of the PPS fiber, so that the wettability and spinnability of the fiber are improved; through post-treatment steps such as desizing, boiling-off and bleaching, slurry, impurities and grease on the surface of the woven fabric can be effectively removed, the wettability and dyeability of fibers are improved, and the post-treated PPS woven fabric has excellent physical properties such as high strength, high temperature resistance and chemical corrosion resistance.

The invention relates to a water-repellent polyester fiber and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out dehydration reaction on hydroxyl-terminated hyperbranched polyester and asymmetric alcoholic hydroxyl single-terminated polydimethylsiloxane to obtain siloxane-terminated hyperbranched polyester; then, polyethylene glycol terephthalate I, siloxane-terminated hyperbranched polyester and dimethyl vinyl siloxy polyhedral oligomeric silsesquioxane are subjected to melt blending to prepare a water-repellent polyester functional master batch, polyethylene glycol terephthalate II and the water-repellent polyester functional master batch are blended, and melt spinning is performed; and finally, coating the surface of the fiber obtained by melt spinning with tri-tert-butoxyvinyl silane, and inducing a grafting reaction through ultraviolet radiation to prepare the water-repellent polyester fiber. The number-average molecular weight of the polyethylene glycol terephthalate I and the polyethylene glycol terephthalate II is in the range of 20000-30000 g / mol; and the contact angle of the water-repellent polyester fiber is greater than 145 degrees. The method is simple; and the prepared product has good mechanical properties and water repellency.

The invention relates to an alumina fiber precursor, a preparation method thereof and an alumina fiber, and relates to the technical field of alumina fibers. The raw material of the alumina fiber precursor comprises a precursor spinning solution, and the precursor spinning solution comprises the following raw material components: nano-alumina sol and a surfactant; wherein the weight of the surfactant is 0.1%-6.0% of the weight of aluminum oxide in the nano aluminum sol. The surfactant can be adsorbed on the surfaces of aluminum particles in the nano aluminum sol, so that a layer of physical barrier is formed on the surfaces of the aluminum particles, meanwhile, surface charges of the aluminum particles are regulated and controlled, electrostatic repulsive force among the aluminum particles is enhanced, contact and aggregation among the aluminum particles are prevented, and the dispersity and stability of the nano aluminum sol are further improved; and the surfactant can induce aluminum particles in the nano aluminum sol to aggregate to form a chain structure, and a three-dimensional network structure is prevented from being formed, so that the spinnability of the precursor spinning solution is improved, and the organizational structure uniformity of the alumina fiber precursor is improved.

The invention provides mesophase pitch and a preparation method thereof, and relates to the technical field of deep processing of petroleum. The method comprises the following steps: by taking aromatic hydrocarbon-rich heavy oil as a raw material, introducing a proper cross-linking agent, synthesizing an oligomer with a weak magnetic triarylmethane structure through low-temperature catalytic polycondensation reaction, enriching and separating the oligomer with the triarylmethane structure by matching with a strong magnetic field under the condition of negative pressure, and then taking the aromatic hydrocarbon-rich heavy oil as a raw material to synthesize the aromatic hydrocarbon-rich heavy oil. And introducing an oil-soluble fluorine-containing complex as a catalyst, and promoting further polycondensation of the oligomer with the triarylmethane structure through a two-stage catalytic polycondensation reaction under a negative pressure condition to form polycyclic aromatic hydrocarbon macromolecules with high molecular weight. According to the process, a triarylmethane structure is successfully introduced into mesophase pitch molecules, so that the spatial configuration and the stacking state of the pitch molecules are improved, and the spinning performance of the mesophase pitch and the mechanical property of the carbon fiber are remarkably improved.

The invention provides a special-shaped spandex monofilament, a preparation method of the special-shaped spandex monofilament, a spinning device and cellosilk. The special-shaped spandex monofilament comprises a multi-leaf-shaped structure. The multi-leaf-shaped structure comprises blades and a central part formed by connecting the adjacent blades; each blade comprises a blade top part, a blade middle part and a blade root part; the blade tops of the adjacent blades are isolated from each other, and the blade middles of the adjacent blades are isolated from each other; the blade root parts of the adjacent blades are connected through a first curved surface which is sunken towards the central part; and the blade top part is a second curved surface which protrudes outwards. The special-shaped spandex monofilament provided by the invention has relatively high profile degree, can be prepared by adopting a spinneret plate, and is simple and convenient to operate, low in requirement on the performance of a spinning solution and high in section profile rate of a product.

The invention discloses a production method of superfine viscose staple fibers. The superfine viscose staple fibers are 0.4-0.44 dtex in single line density, 38-41 mm in length, 2.16-2.48 cN / dtex in dry breaking strength, 1.20-1.49 cN / dtex in wet breaking strength, 18.21% in dry elongation, 80%-87% in whiteness and 0.4-0.6 mg / 100g in defect. By adjusting technological parameters in the processes of dipping, aging, yellowing and ripening and filtering and defoaming after ripening, large-diameter particles and impurities easy to precipitate in spinning raw rubber are removed, it is guaranteed that the diameter of viscose particles meets the production requirement of superfine viscose, and meanwhile the problems of yarn breakage and unstable forming are avoided. The spinneret orifice which is more suitable for superfine viscose fiber production is designed, and the problem that the spinning property of viscose is affected due to the radial expansion effect and large-degree energy loss of viscose trickle at an outlet of the spinneret orifice is solved. The prepared superfine super viscose staple fiber is smaller in single-line density span and higher in fiber quality.

The invention discloses a cotton spinning process for producing worsted pure wool yarns, and relates to the technical field of cotton spinning processes, which comprises the following steps: step S1, wool raw material screening and wool top cutting technology, step S2, wool fiber health treatment, step S3, wool top preparation, step S4, spinning process optimization, and step S5, wool fiber moisture regain control in the spinning process. Wool fibers selected by the wool raw materials are one of merino wool, Kastell wool, Toska wool, Buddha wool and northern Spanish wool, and the wool tops are cut by cutting the wool fibers into 40-45mm in length through a stretch-breaking assembly. The first motor is installed to start and drive the dispersion rod to rotate, the dispersion rod rotates to loosen wool raw materials, the loosen wool raw materials fall into the surface of the conveying belt to be treated, and the functions that the wool raw materials are looser, entanglement among wool fibers is reduced, and meanwhile fiber damage is reduced to the maximum extent are achieved.

The invention relates to the field of polymer materials, and discloses a super absorbent fiber for a core layer material of a diaper. The super absorbent fiber comprises the following raw materials in parts by weight: 70 to 90 parts of sodium acrylate solution, 20 to 45 parts of polyacrylamide microspheres, 2 to 10 parts of modified hydroxyethyl methacrylate, 10 to 30 parts of polyvinyl alcohol solution, 0.5 to 5 parts of an initiator, and 1 to 5 parts of a crosslinking agent; the polyacrylamide microspheres are prepared by an inverse suspension polymerization method; the modified hydroxyethyl methacrylate is hydroxyethyl methacrylate grafted with oxidized multi-walled carbon nanotubes to modify hydroxyethyl methacrylate. The invention improves the water absorption rate, salt resistance and fracture toughness of the super absorbent fiber by adding polyacrylamide microspheres and modified hydroxyethyl methacrylate.

The invention relates to a polyacrylonitrile fiber, a flame-retardant polyacrylonitrile pre-oxidized fiber and a preparation method thereof, the polyacrylonitrile fiber is obtained by taking acrylonitrile, organic silicon modified acrylic acid and ammonium p-styrenesulfonate as raw materials, carrying out homogeneous solution copolymerization and carrying out dry jet wet spinning; polyacrylonitrile fibers are subjected to pre-oxidation treatment, and the flame-retardant polyacrylonitrile pre-oxidized fibers are obtained. The prepared flame-retardant polyacrylonitrile pre-oxidized fiber is good in flame-retardant effect and excellent in mechanical property.

The multifunctional flame-retardant anti-dripping copolyester is composed of structural units represented by I, II, III or I, II, III and IV, when the structural unit [III] is represented by a formula A-W, the number of the structural units [III] is 0.1-99% of that of the structural units [I], and the number of the structural units [IV] is 0.1-99% of that of the structural units [I]; and when the structural unit [III] is of the structure shown in the formula X, the number of the structural units [III] is 0.1-0.99% of the number of the structural units [I], and the number of the structural units [IV] is 0.1-99% of the number of the structural units [I]. The invention also discloses a preparation method and application of the compound. The copolyester disclosed by the invention not only has excellent flame retardance, molten drop resistance, smoke suppression property and mechanical strength, but also has good functions of ultraviolet resistance, bacteria resistance, cationic dyeability and the like, has a good application prospect, and is beneficial to development of high-performance and high-added-value differential polyester products.

The invention relates to the technical field of copolyester staple fibers, and discloses a preparation method of biodegradable aromatic-aliphatic copolyester staple fibers, which comprises the following steps: (1) mixing terephthalic acid, glycollic acid, ethylene glycol and a catalyst, and carrying out esterification reaction to obtain an esterified substance, with the molar weight ratio of terephthalic acid to glycollic acid being (60-80%): (20-40%), the total percentage is 100%. Mixing the esterified product with an antioxidant and a stabilizer, and performing condensation polymerization to obtain copolyester; and (2) drying the copolyester, carrying out melt extrusion, cooling to obtain a protofilament, bundling, oiling, drafting and shaping to obtain the copolyester staple fiber. Glycollic acid is introduced as a third monomer, and the polyester structure is modified from the molecular level, so that the polyester has certain mechanical strength and good spinnability while having good degradation performance.

The application discloses a method for preparing silicon carbide ceramic fibers by combining sol-gel and dry spinning. The method comprises the following steps: 1) after preparing a second silicon-based sol, a spinning aid is added to prepare a spinnable silicon-based sol; 2) the spinnable silicon-based sol is prepared into fiber filaments by using a dry spinning process; 3) the fiber filaments are cracked into silicon-carbon-oxygen fibers; and 4) the silicon-carbon-oxygen fibers are sintered into silicon carbide ceramic fibers. The method is different from a mainstream polycarbosilane precursor method for preparing silicon carbide ceramic fibers, does not need a non-melting treatment process, has the advantages of adjustable composition, low raw material cost and simple process and the like, and has important significance for low-cost preparation of silicon carbide ceramic fibers.

The invention discloses a composite fiber membrane as well as a preparation method and application thereof. The preparation method of the composite fiber membrane comprises the following steps: A, premixing deionized water and anhydrous acetic acid to form an acetic acid aqueous solution; b, taking one part of the acetic acid aqueous solution obtained in the step A, and adding chitosan into the acetic acid aqueous solution to obtain a first mixed solution; c, taking one part of the acetic acid aqueous solution obtained in the step A, and adding polyoxyethylene into the acetic acid aqueous solution to obtain a second mixed solution; d, mixing the first mixed solution and the second mixed solution, adding bioglass in the stirring process, and stirring until the bioglass is uniformly dispersed to obtain a spinning solution; and E, adding the spinning solution into electrostatic spinning equipment, and spinning to obtain the composite fiber membrane. The preparation process disclosed by the invention is relatively simple, relatively low in cost and environment-friendly, and the prepared composite fiber membrane has no biotoxicity and is suitable for being used as a bone repair biological membrane for guiding bone tissue regeneration.

This invention provides a method for detecting the spinnability and uniformity of spandex spinning dope. The method involves performing steady-state and dynamic tests on the spandex spinning dope to obtain its non-Newtonian index, viscosity coefficient, yield stress, maximum stress in the linear viscoelastic region, and maximum strain. Analysis of these test results yields a determination of whether the spandex spinning dope possesses excellent spinnability and uniformity. This method offers the advantages of rapid detection and accurate results. Spandex spinning dopes that pass this method exhibit minimal gelation during storage and excellent fluidity. During spinning, they show minimal yarn breakage and snagging, and a low probability of malfunctions, demonstrating excellent spinnability and uniformity.

The invention belongs to the technical field of sheath-core composite fibers, and particularly relates to a preparation method of an efficient temperature-adjusting sheath-core composite fiber, and the preparation method comprises the steps of preparation of an aluminum organic ligand, preparation of a sheath layer melt and melt spinning. According to the invention, dicyclohexylmethane diisocyanate and monoethanolamine are subjected to an addition reaction to generate urea bonds which are coordinated with Al < 3 + > to obtain an aluminum organic ligand, Al2O3 which is uniformly distributed is generated in situ in a PA matrix in the melt blending process of the aluminum organic ligand and the PA matrix, the heat conductivity of a skin layer is improved, and the heat conductivity of the skin layer is improved under the combined action with a phase change material in a core layer; the synergistic effect of rapid heat conduction and phase change temperature adjustment is achieved, and efficient temperature adjustment and rapid heat conduction and heat dissipation are completed. The high-efficiency temperature-adjusting sheath-core type composite fiber prepared by the invention can be applied to the fields of home textiles, clothing and the like, and has a better application prospect in mattresses due to good temperature sensing capability.

The invention relates to an oiling agent for chemical fiber spinning and a preparation method and application of the oiling agent. The oiling agent comprises novel oligomeric potassium alkyl sulfate, a nonionic surfactant, an emulsifier, solvent oil and water. The emulsion formed by dissolving the novel oligomeric alkyl sulfate potassium salt oil agent in water has excellent stability, and does not have obvious phase separation phenomena such as sinking and floating after standing at room temperature for 56h. When the oiling agent for chemical fiber spinning disclosed by the invention is applied to the field of chemical fiber production, chemical fibers can be endowed with excellent antistatic property and smoothness, so that the spinnability of the chemical fibers is better; and the oiling agent belongs to a green phosphorus-free formula, so that the spinnability index of chemical fibers is guaranteed, and the pollution of discharged water to the environment is reduced.

In order to provide artificial leather having both strength (in particular, tensile strength and tear strength), surface appearance, and a dense feeling in artificial leather including a fiber-entangled body containing a nonwoven fabric made of ultrafine fibers containing a large amount of inorganic particles (in particular, metal compounds) as a constituent element, and an elastic polymer, the artificial leather of the present invention is artificial leather including a fiber-entangled body containing a nonwoven fabric made of ultrafine fibers having an average single fiber diameter of 1.0 um or more and 10.0 um or less as a constituent element and an elastic polymer, and satisfies the following requirements: (1) the ultrafine fibers include a polyester-based resin containing a manganese-based compound; (2) an average particle diameter of the manganese-based compound is 0.01 um or more and 0.20 um or less; and (3) the ultrafine fibers contain a manganese element in an amount of 0.1 ppm or more and 50.0 ppm or less in 100 mass% of the ultrafine fiber.

The invention relates to the technical field of spinning oils, and discloses a low-fuel-consumption polyester FDY spinning oil for WINGS equipment and a preparation method thereof. The components of the spinning oil include a smoothing agent and an anti-splashing agent. The branched structure of the smoothing agent can significantly improve the penetration wettability of the oil to fiber filaments and the oil film strength, and significantly reduce the oil consumption when the spinning oil is used; the structure of the anti-splashing agent includes sulfur and / or phosphorus, and the anti-splashing agent can form a three-dimensional structure in the oil, reduce the splashing effect of the oil during the collision between the oil and the fiber filaments, and further reduce the oil consumption when the spinning oil is used; in addition, the spinning oil emulsion is stable, and there is no obvious corruption phenomenon during a long-term production process. It has the technical effects of strong anti-corrosion, excellent antistatic property, high smoothness, stable and uniform oil content of filament bundles, good spinnability, and low breakage rate.