High-temperature-resistant super-high-speed fdy oil and preparation method thereof

Abstract

The application relates to the technical field of textile auxiliaries, and provides a high-temperature-resistant super-high-speed spinning FDY oil agent and a preparation method thereof. The preparation method comprises the following steps: S100, heating base oil to 40-70 DEG C, adding oil-soluble ionic liquid and carrying out mixing treatment to obtain an oil phase; S200, adding an anti-wear agent into the oil phase and carrying out stirring treatment to obtain a composite lubricating phase; S300, adding the composite lubricating phase into a water phase, and carrying out high-shear emulsification at 40-60 DEG C to obtain an emulsion type oil agent; and S400, sequentially carrying out cooling treatment and filtration treatment on the emulsion type oil agent to obtain the FDY oil agent. By introducing the oil-soluble ionic liquid into the base oil and cooperating with the anti-wear agent to form a stable lubricating protective film at high temperature, the oil agent can still maintain good lubricity and oil film continuity under high-temperature conditions, the smoke and deposition phenomenon caused by thermal oxidative decomposition and high-temperature volatilization is reduced, and the high-temperature resistance use requirement of the super-high-speed spinning process is met.

Description

Technical Field

[0001] This invention relates to the technical field of textile auxiliaries, and more specifically, to a high-temperature resistant ultra-high-speed spinning FDY oiling agent and its preparation method. Background Technology

[0002] Fully Drawn Yarn (FDY) ultra-high-speed spinning technology is widely used in the chemical fiber industry due to its high production efficiency and stable forming quality. With the continuous increase in spinning speed and the rising temperatures of hot rollers in stages such as drawing and setting, the contact friction between the yarn bundle and metal / ceramic components intensifies significantly, leading to a greater instantaneous temperature rise on the yarn bundle surface. This significantly increases the probability of the spinning oil being subjected to prolonged or repeated heating under high-temperature conditions. Therefore, FDY oils used in ultra-high-speed spinning not only need to provide basic lubrication and bundling functions but also need to possess excellent high-temperature resistance to ensure stable oil film formation and continuous lubrication under high-temperature conditions.

[0003] Existing FDY oils typically use synthetic esters or polyethers as the main base oil, supplemented with emulsifiers, antistatic agents, and stabilizers to form an emulsion system, aiming to achieve functions such as uniform oiling, lubrication and friction reduction, and static control. However, when spinning speed increases and hot roller temperature rises, traditional oil systems are prone to insufficient high-temperature resistance: on the one hand, some base oils and functional additives undergo thermal oxidation decomposition or volatilization at high temperatures, leading to thinning of the oil film or even local breakage, resulting in decreased lubrication performance and causing operational problems such as fuzzing, yarn breakage, and roller entanglement; on the other hand, the oil is prone to deterioration and smoke formation on high-temperature roller surfaces, and its cracking products or oxidized polymers are prone to depositing on hot rollers, guides, and oil spraying components, causing roller surface contamination, uneven oiling, and increased frequency of equipment cleaning and maintenance, which in severe cases affects continuous and stable production and product quality consistency.

[0004] To improve lubrication stability under high-temperature conditions, existing technologies include optimization methods such as enhancing the thermal stability of the base oil, adding antioxidants, or adjusting the emulsion system. However, relying solely on traditional antioxidant systems or conventional oil formulation adjustments often fails to simultaneously meet the requirements of oil film strength, heat resistance to degradation, and low smoke deposition under the high friction, high temperature, and strong shear environment of ultra-high-speed spinning. Problems such as insufficient high-temperature lubrication protection, poor oil film continuity, and difficulty in effectively suppressing smoke and deposition persist. Therefore, there is an urgent need to develop a high-temperature resistant ultra-high-speed spinning FDY oil and its preparation method to solve these problems. Summary of the Invention

[0005] One of the problems addressed by this invention is how to provide a high-temperature resistant, ultra-high-speed spinning FDY oiling agent.

[0006] To solve at least one of the above problems, the present invention provides a method for preparing a high-temperature resistant ultra-high-speed spinning FDY oil, the method comprising: S100: Heat the base oil to 40-70℃, add the oil-soluble ionic liquid and mix to obtain the oil phase; S200, an anti-wear agent is added to the oil phase and stirred to obtain a composite lubricating phase; S300: Add the composite lubricating phase to the aqueous phase and perform high-shear emulsification at 40-60℃ to obtain an emulsion-type oil. S400: The emulsion-type oil is subjected to cooling and filtration treatments in sequence to obtain FDY oil. The aqueous phase includes antistatic agents, stabilizers, and emulsifiers.

[0007] In the above technical solution, the base oil includes at least one or a combination of polydiethylene glycol esters, pentaerythritol esters, and diisooctyl sebacate; and / or the oil-soluble ionic liquid includes at least one or a combination of imidazole ionic liquids with C6-C18 alkyl substitution, tetraalkyl quaternary ammonium ionic liquids, and tetraalkylphosphonium ionic liquids; and / or the amount of oil-soluble ionic liquid added is 0.1-5% of the total mass of the FDY oil; and / or the anti-wear agent includes at least one or a combination of aryl phosphate esters, isobutylene sulfate, ashless dithiophosphate esters, and ashless dithiocarbamate esters; and / or the amount of anti-wear agent added is 0.05-3% of the total mass of the FDY oil. The agent may contain: ; and / or emulsifiers including at least one or a combination of nonionic emulsifiers and amphoteric emulsifiers; and / or the amount of emulsifier added is 0.2-5.0% of the total mass of the FDY oil; and / or stabilizers including at least one or a combination of polyvinylpyrrolidone and sodium carboxymethyl cellulose; and / or the amount of stabilizer added is 0.05-1.0% of the total mass of the FDY oil; and / or antistatic agents including at least one or a combination of quaternary ammonium salt antistatic agents, amine salt antistatic agents, sulfonate antistatic agents, amphoteric antistatic agents, and polyether antistatic agents; and / or the amount of antistatic agent added is 0.1-3.0% of the total mass of the FDY oil.

[0008] In the above technical solution, the mixing speed is 300-800 rpm and the time is 15-45 min.

[0009] In the above technical solution, in S200, the stirring speed is 200-600 rpm and the time is 10-30 min.

[0010] In the above technical solution, in S300, the high shear treatment speed is 3000-8000 rpm and the time is 3-10 min; and / or the pH value of the emulsion-type oil is 6.0-7.5 and the D50 is 200-600 nm.

[0011] In the above technical solution, in S400, the filtration process includes first using a 100-200µm filter screen for coarse filtration, and then using a 25-80µm filter medium for fine filtration; and / or the cooling process is carried out at a temperature of 25-40℃.

[0012] In the above technical solution, in S100, the oil phase also includes the addition of low molecular weight polyether; wherein, the number average molecular weight Mn of the low molecular weight polyether is 200-2000, and the amount of low molecular weight polyether added is 0.2-8% of the total mass of FDY oil.

[0013] In the above technical solution, after the filtration process in S400, at least one or a combination of antioxidants, preservatives and defoamers is added.

[0014] In the above technical solutions, the antioxidant includes tert-butylhydroquinone, and the amount of antioxidant added is 0.01-0.20% of the total mass of the FDY oil; and / or the preservative includes benzyl alcohol or phenoxyethanol, and the amount of preservative added is 0.02-0.50% of the total mass of the FDY oil; and / or the defoamer includes silicone oil emulsion type defoamer or polyether modified silicone defoamer, and the amount of defoamer added is 0.005-0.10% of the total mass of the FDY oil. This invention also provides a high-temperature resistant ultra-high-speed spinning FDY oil, which is obtained using the preparation method of any of the above technical solutions.

[0015] Beneficial Effects: This invention provides a high-temperature resistant ultra-high-speed spinning FDY oil and its preparation method. This method introduces an oil-soluble ionic liquid into the base oil and synergistically constructs a composite lubricating phase with an anti-wear agent, making it easier for the oil to form a continuous and stable lubricating protective film at the high-temperature, high-shear friction interface. The oil-soluble ionic liquid has a stronger polar adsorption tendency on metal or ceramic surfaces, maintaining boundary coverage even when the oil film thins, reducing the risk of direct contact and adhesive wear on solid surfaces. Under high temperature and contact stress conditions, the anti-wear agent further forms an anti-wear protective structure at the interface, improving the load-bearing capacity and shear resistance of boundary lubrication. The synergistic effect of both effectively inhibits localized breakage of the oil film due to viscosity decrease and shear failure under high-temperature conditions, thereby maintaining low friction and stable lubrication, and reducing operational risks such as fuzzing, yarn breakage, and roller entanglement. Meanwhile, the composite lubricating protective film reduces the coefficient of friction and wear, and inhibits the formation of local hot spots. It also reduces thermal decomposition and oxidative polymerization reactions induced by frictional heat under high-temperature conditions, thus reducing the source of smoke and the generation of deposition precursors. The oil-soluble ionic liquid has a low volatility tendency and remains stably in the oil phase, reducing high-temperature volatilization losses and mitigating smoke and deposition tendencies in high-temperature areas. With the help of emulsifiers and stabilizers, the composite lubricating phase is stably dispersed in the aqueous continuous medium as fine and concentrated droplets, improving the wetting and spreading of the oil on the fiber surface and the consistency of oil supply. This reduces the probability of droplet aggregation, stratification, and oil supply fluctuations during storage and circulation, further ensuring the uniformity and repeatability of film formation under high-temperature conditions. Furthermore, after emulsification, cooling and graded filtration remove agglomerated droplets, gel flocs, and abnormally large particles such as foreign impurities, improving the cleanliness of the finished product and the compatibility of the oil supply system. This reduces the causes of nozzle clogging, metering fluctuations, and deposition in high-temperature areas, and enhances the stability of continuous industrial production. In summary, the FDY lubricant of the present invention can balance lubrication stability, low smoke and low deposition tendency, and emulsion storage stability in the high-temperature friction environment of ultra-high speed spinning, thus meeting the requirements for high-temperature resistant lubricants in the ultra-high speed spinning process. Detailed Implementation

[0016] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, a detailed description of specific embodiments of the present invention will be provided below.

[0017] Unless otherwise specified, all reagents and raw materials used in this invention are commercially available. Experimental methods in the following examples that do not specify particular conditions should be performed according to conventional methods and conditions, or as selected in the product instructions.

[0018] In this invention, ultra-high-speed spinning refers to the spinning linear speed of 5500-7500 m / min during the FDY spinning and drawing and setting process. Within this speed range, the relative sliding speed between the filament bundle and the guide device and the hot roller is significantly increased, enhancing interfacial shearing and frictional heat accumulation, which places higher demands on the film-forming stability and high-temperature lubrication continuity of the oil.

[0019] Based on this, the high-temperature resistance of the present invention specifically refers to the ability of the oil to maintain stable lubrication and low deterioration tendency when the oil undergoes the stretching and heat setting stages during the ultra-high-speed spinning process, at high-temperature locations such as hot rollers and hot boxes, and meets one or more of the following conditions: the surface temperature of the hot roller or high-temperature guide component is 160-230°C; the filament bundle undergoes periodic contact with the hot roller or guide component at high-temperature locations, with a single contact dwell time of 0.01-0.20s, exhibiting a history of repeated heating in continuous production; at the high-temperature friction interface, the local shear and contact stress borne by the oil film leads to the risk of instantaneous temperature rise and thermo-oxidative synergistic deterioration of the oil, which easily causes smoke and deposition problems. The core of high-temperature resistance is that under these harsh conditions, the oil can still maintain the continuity of the oil film and significantly reduce the tendency of smoke and deposition.

[0020] This invention aims to provide a high-temperature resistant FDY oiling agent for ultra-high-speed spinning, used for lubrication and protection of the filament bundle in high-temperature guide components and hot rollers during ultra-high-speed spinning. It is particularly suitable for scenarios where oil film is prone to deterioration and volatility, accompanied by fumes and deposition risks, under high-temperature conditions such as drawing and heat setting. The FDY oiling agent of this invention comprises a base oil, an oil-soluble ionic liquid, an anti-wear agent, an antistatic agent, an emulsifier, a stabilizer, and the balance being water.

[0021] The base oil includes at least one or a combination of polydiethylene glycol esters, pentaerythritol esters, and diisooctyl sebacate. As the main lubricating phase of the oil, the base oil provides basic lubrication and film-forming ability for the fiber surface, and provides lower volatilization loss and better thermal stability under high temperature conditions, thus providing a material basis for high-temperature lubrication.

[0022] Oil-soluble ionic liquids include at least one or a combination of imidazole ionic liquids with C6-C18 alkyl substitution, tetraalkyl quaternary ammonium ionic liquids, and tetraalkylphosphonium ionic liquids. Oil-soluble ionic liquids can form a stable polar adsorption layer or boundary lubrication film at high temperature and high friction interface, enhancing the continuity and load-bearing capacity of the oil film under high temperature conditions, thereby reducing the risk of lubrication failure caused by oil film rupture under high temperature conditions.

[0023] Anti-wear agents include at least one or a combination of aryl phosphates, sulfurized isobutylene, ashless dithiophosphates, and ashless dithiocarbamates. Anti-wear agents are used to provide anti-wear protection at high-temperature contact interfaces and improve extreme pressure lubrication performance, synergistically reduce friction and wear between the filament bundle and the guide device or hot roller, suppress local temperature rise and oil film deterioration induced by high-temperature friction, and thus improve the stable lubrication ability of the oil during high-temperature operation.

[0024] Emulsifiers include at least one or a combination of nonionic emulsifiers and amphoteric emulsifiers. Emulsifiers are used to reduce the interfacial tension between oil and water and promote the uniform dispersion of the oil phase in the aqueous phase, thereby ensuring the spreadability, wettability, and uniformity of the oil during the oiling process and reducing the risk of stratification during storage and use. Nonionic emulsifiers include fatty alcohol polyoxyethylene ethers, castor oil polyoxyethylene ethers, sorbitan fatty acid esters and their polyoxyethylene derivatives, and polyoxyethylene-polyoxypropylene block copolymers; amphoteric emulsifiers include cocamidopropyl betaine and alkyl dimethylamine oxide.

[0025] Antistatic agents include at least one or a combination of quaternary ammonium salt type antistatic agents, amine salt type antistatic agents, sulfonate type antistatic agents, zwitterionic type antistatic agents, and polyether type antistatic agents. Antistatic agents are used to suppress the accumulation of static electricity generated during contact friction between the fiber bundle and the guide, hot roller, etc., air flow and stretching process, reduce the surface charge density and surface resistance of the fiber, thereby reducing static dust adsorption, fly filaments, fiber bundle dispersion, roller wrapping and breakage and other operation problems, and improving the controllability and process stability of the fiber bundle after oiling.

[0026] Stabilizers include at least one of polyvinylpyrrolidone, sodium carboxymethyl cellulose, or combinations thereof; stabilizers are used to improve the structural stability of the aqueous phase and provide steric hindrance or viscosity stabilization effects, inhibit emulsion oil droplet aggregation and sedimentation, improve the uniformity of emulsion particle size distribution and long-term storage stability, and at the same time help to improve the stability and repeatability of the oiling process.

[0027] Furthermore, in addition to providing emulsion stabilization, the stabilizer of the present invention also has a certain bundle-forming effect. The polymer molecules have a certain tendency to adsorb and form films on the fiber surface. After oiling, they can form a thin polymer network or steric hindrance layer as the water evaporates, which moderately enhances the effective contact area and cohesion between the filaments, thereby improving the bundle-forming properties and reducing fiber dispersion and fly filaments. At the same time, the stabilizer increases the viscosity of the aqueous phase and the strength of the interfacial film, which can reduce the local oil-rich or oil-poor phenomenon caused by oil droplet aggregation and phase separation, making the oiling more uniform and indirectly improving the consistency of bundle formation and the operational stability of the subsequent drawing and setting process.

[0028] Water, as the continuous phase of the emulsion, carries emulsifiers and stabilizers and adjusts the viscosity and rheological properties of the system, making the oil easy to prepare, transport and meter for application. At the same time, it evaporates with the working conditions after oiling, so that the oil phase forms a lubricating film on the fiber surface.

[0029] In addition, the FDY oil may optionally include low molecular weight polyether, antioxidant, preservative, and defoamer. The low molecular weight polyether is at least one or a combination of polypropylene glycol or ethylene oxide and propylene oxide block copolymer polyether with a number average molecular weight (Mn) of 200-2000. The low molecular weight polyether improves the compatibility between the oil phase and polar components and enhances the spreading and wetting properties of the oil on the fiber surface. It also contributes to uniform oil application and stable oil film continuity under high-temperature conditions, thereby indirectly improving the consistency of high-temperature operation. The antioxidant includes tert-butylhydroquinone. The antioxidant inhibits the thermal oxidation reaction of the base oil and functional additives under high-temperature conditions, slows down oil deterioration, and reduces the generation and deposition tendency of fumes caused by oxidative polymerization, thereby further improving the high-temperature resistance of the oil. The preservative includes benzyl alcohol or phenoxyethanol. The preservative inhibits the growth and reproduction of microorganisms in the aqueous system, reducing the risk of deterioration, off-odors, and abnormal viscosity during storage or use, ensuring the long-term storage stability and reliability of the oil. Defoamers include silicone oil emulsion defoamers or polyether-modified silicone defoamers. Defoamers are used to reduce foam introduced during preparation and use by stirring, high-shear emulsification or circulating transport, to avoid foam affecting the stability and uniformity of metered oil application, and to reduce the risk of emulsion instability caused by air entrainment in foam, thereby improving the operability and consistency of oil preparation and application.

[0030] At the high-temperature friction interface of ultra-high-speed spinning, oil fumes and deposits mainly originate from: dry friction and local hot spots caused by oil film rupture; thermal oxidation cracking and oxidation polymerization of oil under high temperature and metal surface to generate gum or varnish-like products; and light volatile components escaping and forming fumes that condense and deposit at hot and cold spots.

[0031] This invention introduces an oil-soluble ionic liquid into a base oil, which, in conjunction with an anti-wear agent, forms a stable lubricating protective film at high temperatures. The ionic liquid preferentially forms a polar adsorption boundary layer at the high-temperature friction interface, serving as an anchoring basis for the interfacial enrichment and film formation of the anti-wear agent, thus forming a composite boundary lubricating protective film. This allows the oil to maintain good lubricity and film continuity under high-temperature conditions, reducing the coefficient of friction and wear, suppressing local hot spots, and reducing the probability of triggering thermal decomposition and oxidation chain reactions from the source. Simultaneously, this protective film isolates metal and ceramic surfaces, reducing the tendency for interfacial catalytic oxidation and polymerization, thereby reducing the formation of deposition precursors. The ionic liquid itself has a low vapor pressure and good thermal stability, and it resides stably in the oil phase, reducing high-temperature volatilization losses. The specific preparation method includes the following steps: S100: Heat the base oil to 40-70℃, add the oil-soluble ionic liquid and mix to obtain the oil phase; S200, an anti-wear agent is added to the oil phase and stirred to obtain a composite lubricating phase; S300: Add the composite lubricating phase to the aqueous phase containing emulsifier and stabilizer, and perform high-shear emulsification at 40-60℃ to obtain an emulsion-type oil. S400: The emulsion-type oil is subjected to cooling and filtration treatments in sequence to obtain FDY oil.

[0032] The technical solution of this invention involves mixing a base oil with an oil-soluble ionic liquid to prepare a homogeneous oil phase. The aim is to establish an oil phase foundation with high-temperature lubrication potential and to provide a prerequisite for subsequent emulsification to form stable droplets. After heating the base oil to 40-70°C, the oil-soluble ionic liquid is introduced under stirring conditions, allowing it to fully dissolve or uniformly disperse in the base oil, forming a composite lubrication system with the oil phase as the continuous phase. This ensures a relatively uniform distribution of the highly polar and strongly adsorbent ionic liquid in the oil phase, reducing its tendency to partition into the aqueous phase or locally accumulate during subsequent emulsification and use. This mitigates the risk of performance fluctuations caused by uneven component distribution. The polar groups of the ionic liquid can form a strong solvation effect with the base oil components and easily form an adsorption film at the interface to form a boundary lubrication layer at the subsequent high-temperature friction interface. The base oil provides a continuous film-forming carrier. Together, these two components enable the resulting oil phase to maintain oil film continuity and load-bearing stability at high temperatures, laying the foundation for the high-temperature lubrication performance of the final oil.

[0033] It should be noted that heating the base oil to 40-70℃ can significantly reduce the viscosity of the ester-based oil system and increase the dissolution and diffusion rate of the ionic liquid in the oil phase, making the mixture tend to be homogeneous in a shorter time. At the same time, this temperature range is usually lower than the starting temperature range where the ionic liquid and most functional additives undergo significant volatilization or thermal oxidation, which can reduce volatilization loss and initial oxidation risk during the mixing stage, thereby reducing the tendency of the oil phase to deteriorate during the preparation process.

[0034] Oil-soluble ionic liquids exhibit strong polarity, with their cations and anions showing a greater tendency to adsorb onto metal or ceramic surfaces. Under high temperature and high shear conditions, traditional ester-based oils primarily rely on fluid lubrication, which is prone to thinning and even localized breakage due to viscosity decreases and insufficient localized lubrication. In contrast, oil-soluble ionic liquids preferentially form a dense adsorption boundary layer on the friction pair surface. This boundary layer is not easily desorbed under high temperature conditions and can maintain continuous interface coverage even when the oil film thins, reducing direct contact and thus inhibiting the increase in friction coefficient and aggravated wear. Furthermore, oil-soluble ionic liquids can exist stably in the oil phase and migrate with the emulsion droplets to the contact interface between the fiber and the guide device, continuously providing boundary lubrication during oiling and operation.

[0035] Under high temperature and high contact stress conditions, anti-wear agents can be adsorbed and oriented at the friction interface, forming a protective film under the action of frictional heat and contact stress, thereby improving the interface's load-bearing capacity. This film can reduce shear stress concentration and micro-protrusion adhesive wear, inhibit the formation of local hot spots, and slow down the accumulation of frictional heat, thus reducing the risk of oil film destruction under high shear conditions and improving the reliability of high-temperature lubrication.

[0036] The polar adsorption boundary layer formed by oil-soluble ionic liquids can serve as a basic layer for stable interfacial coverage, promoting the enrichment and retention of anti-wear agents at the interface, making it easier to form a continuous and shear-resistant protective structure. The protective structure formed by the anti-wear agents further enhances the load-bearing and shear resistance of the boundary layer, and the two work together to construct a composite lubrication protective film. Through this synergistic effect, lubrication changes from mainly relying on fluid lubrication to being jointly undertaken by fluid lubrication and boundary lubrication. Even when the oil film thins due to high temperatures, continuous coverage can still be maintained and a stable low-friction state can be preserved.

[0037] If non-oil-soluble or hydrophilic ionic liquids are selected, they are difficult to dissolve stably in the oil phase, easily leading to stratification and precipitation or entry into the aqueous phase during emulsification. This makes it difficult for the ionic liquid to be effectively carried by the oil phase and accumulate at the interface between the fiber and the guide wire device, hindering the achievement of the expected high-temperature lubrication enhancement effect. Furthermore, hydrophilic ionic liquids may increase the ionic strength of the system and alter the electrical properties and solvation environment of the emulsion interface, increasing the risk of emulsion flocculation, thickening, or decreased stability, and potentially increasing the filtration load. Therefore, selecting oil-soluble ionic liquids is more conducive to their stable distribution in the oil phase and the achievement of controllable interface supply, thereby continuously providing polar adsorption and boundary lubrication effects at high-temperature interfaces and improving the high-temperature lubrication stability of the oil.

[0038] Preferably, the anion of the oil-soluble ionic liquid includes at least one or a combination of bis(trifluoromethanesulfonyl)imide, trifluoromethanesulfonate, alkyl sulfonate, alkyl sulfate, and dialkyl phosphate. The use of an anionic system with high hydrolytic stability and strong hydrophobicity in the aqueous emulsion system allows the ionic liquid to remain stably in the oil droplet phase of the emulsion and provide boundary lubrication at the high-temperature friction interface, thereby reducing the acidic byproducts and potential corrosion risks caused by the hydrolysis of the ionic liquid anion.

[0039] In practice, the mixing speed is 300-800 rpm and the time is 15-45 min. At this speed and time, sufficient convection and turbulence intensity can be provided without introducing excessive shear heat and without significantly entraining air, so as to promote the rapid dissolution of ionic liquid in ester-based oil with high viscosity and eliminate local concentration gradients, thereby obtaining an oil phase with uniform composition. If the speed is too low, the mass transfer efficiency will be insufficient, and the ionic liquid may be locally enriched or microphase separated, resulting in subsequent emulsion particle size fluctuations and inconsistent high-temperature performance. If the speed is too high, it is easy to introduce bubbles and cause foam entrainment, and may cause the system temperature to rise too quickly, resulting in volatilization loss or increasing the uncertainty of subsequent emulsification.

[0040] Furthermore, when the selected ionic liquid is highly polar or the amount added is close to the upper limit, causing a slight turbidity in the oil phase, or when the viscosity of the base oil system is high, resulting in insufficient mixing uniformity, the addition of low molecular weight polyether can further improve the stability of the oil phase and enhance the high-temperature lubrication continuity. Low molecular weight polyether can be added simultaneously as a solubilizing and compatibilizing agent; in specific operations, it can be added simultaneously with the oil-soluble ionic liquid, or a small amount of polyether can be added first, followed by the oil-soluble ionic liquid. The aim is to further improve the film-forming stability and compatibility stability of the oil phase system under high-temperature conditions. Especially after the base oil is mainly ester-based and an oil-soluble ionic liquid is introduced, the system contains both non-polar segments and strongly polar groups. Low molecular weight polyether can serve as a compatible component with both polarity and hydrophobicity to improve the solubilization environment of the system, thereby reducing the risk of local enrichment and microphase separation of ionic liquid or functional additives in the oil phase and improving the compositional homogeneity of the oil phase. The ether oxygen of the polyether segments can generate strong solubilization and hydrogen bonding or dipole interaction with the polar groups in ionic liquids or anti-wear agents. At the same time, its segments can form a good miscibility relationship with ester-based oils, so that the polar components can reside more stably in the oil phase and participate in subsequent film formation and lubrication together with the oil phase.

[0041] Traditional lubricants are prone to shear failure and frictional heat accumulation at high-temperature, high-speed contact interfaces due to the shearing of the oil film. Considering this, anti-wear agents enhance boundary lubrication and extreme pressure anti-wear capabilities, making the oil film more stable under high-temperature, high-shear environments, thereby improving the lubricant's high-temperature reliability. Therefore, this invention introduces anti-wear functional components to construct a composite lubricating phase based on a pre-formed, homogeneous oil phase. This enhances the load-bearing capacity and anti-wear protection capabilities of interfacial lubrication under high-temperature conditions. The anti-wear agent can form a protective boundary film through adsorption or reaction under high-temperature and high-contact-stress conditions, reducing shear stress concentration on metal or ceramic surfaces. This reduces friction and wear between fibers and guide components or hot rollers, suppresses localized abnormal temperature rise, and indirectly reduces the thermal oxidation decomposition and volatilization loss of the lubricant, as well as its deposition tendency. In practice, the stirring speed is 200-600 rpm and the time is 10-30 min. This ensures that the anti-wear agent is fully dissolved and uniformly dispersed while avoiding bubble entrainment and unnecessary temperature rise caused by excessive shear, thus balancing mixing efficiency and system stability. When the speed is too low or the time is too short, the anti-wear agent may not dissolve completely or there may be local concentration gradients, resulting in uneven droplet composition during subsequent emulsification and fluctuations in lubrication performance at high temperatures. On the other hand, excessively high speed or long time may introduce a large amount of air to form microbubbles and increase the foam burden of subsequent emulsification. It may also cause the system temperature to rise, leading to the loss of some volatile components or premature oxidation and deterioration, affecting the consistency and high-temperature resistance of the final product. Therefore, within this speed and time range, a uniform composite lubricating phase can be stably obtained, laying the foundation for the formation of a controllable emulsion structure with particle size in subsequent high-shear emulsification.

[0042] In some embodiments, to improve the compositional uniformity of the composite lubricating phase and reduce the risk of precipitation during subsequent emulsification and filtration, the anti-wear agent is preferably pre-dissolved in the oil phase before emulsification. Preferably, ashless dithiophosphate anti-wear agents, ashless dithiocarbamate anti-wear agents, and aryl phosphate anti-wear agents with high viscosity or slow dissolution rate can be pre-dissolved in a portion of the base oil to form a mother liquor before being added to the main oil phase for emulsification; when two or more anti-wear agents are compounded, the pre-dissolution method is also preferred. For sulfurized isobutylene anti-wear agents, a separate mother liquor may not be necessary, but it should be ensured that it is uniformly dispersed in the oil phase and that there are no visible insoluble substances or stratification in the oil phase before entering high-shear emulsification.

[0043] In S300, a composite lubricating phase is added to an aqueous phase containing emulsifiers and stabilizers and emulsified. This emulsion-type oil phase, possessing high-temperature lubrication capabilities, is stably dispersed in the continuous aqueous medium as fine and uniform droplets, constructing an emulsion-type oiling system suitable for metering and continuous conveying in ultra-high-speed spinning. This achieves rapid wetting and uniform spreading of the oil on the fiber surface and ensures stable and controllable oil application. The emulsifier reduces the interfacial tension between oil and water and promotes the breakup of the oil phase into small droplets. The stabilizer provides steric stabilization or viscosity stabilization effects in the aqueous phase to inhibit droplet aggregation and sedimentation, resulting in a more concentrated droplet size distribution and maintaining structural stability during storage and use. Because the composite lubricating phase contains oil-soluble ionic liquids and high-temperature resistant functional components such as anti-wear agents, after emulsification, it is more easily and uniformly carried to the fiber surface during oiling, forming a continuous oil film at the high-temperature friction interface. This ensures stable lubrication under high-temperature conditions and reduces the risk of failure due to localized oil film rupture.

[0044] In practice, the high-shear treatment speed is 3000-8000 rpm, and the time is 3-10 minutes. The composite lubricating phase contains highly polar ionic liquids and various additives. If only conventional stirring and emulsification is used, it is often difficult to form small and uniformly distributed droplets in a short time. This can easily lead to droplet size being too large or too wide, resulting in decreased storage stability, poor oiling uniformity, and localized oil richness or lack of oil during high-temperature operation, thus affecting the consistency of high-temperature lubrication. High-shear emulsification can provide sufficient shear field and turbulent energy in a short time, causing the oil phase to break down rapidly under the action of the emulsifier and form a stable new interface. At the same time, it promotes the rapid adsorption and distribution of the emulsifier at the interface, reduces the time window for droplet re-aggregation, and thus obtains smaller droplet size and narrower droplet size distribution. The specified rotation speed and time range can achieve a balance between droplet refinement efficiency and system temperature rise control. When the shear is insufficient, the droplets are difficult to refine and are prone to agglomeration. However, excessive shear or time may lead to system temperature rise, foam entrainment, or local excessive shear, which may damage the stabilizer structure and affect the stability of the emulsion.

[0045] In practical implementation, the pH value of emulsion-type oils is 6.0-7.5, and the D50 is 200-600nm. The pH value is in the weakly acidic to near-neutral range, which can reduce the risk of water corrosion to equipment materials and reduce emulsion instability caused by hydrolysis or drastic changes in charge state of emulsifiers and stabilizers under extreme acid and alkaline conditions. This helps to maintain the integrity of the emulsion droplet interface film and improve storage stability. At the same time, this pH range is also conducive to the function of the anti-corrosion system and reduces the risk of viscosity drift caused by microbial growth. When the droplet size D50 is within the above-mentioned range, the droplets have a larger specific surface area and are more uniformly dispersed, making it easier for the composite lubricating phase to spread evenly on the fiber surface and reducing oil film vacancies caused by localized oil abundance or deficiency. During periodic contact at high-temperature locations, the oil phase can be replenished more quickly and maintain continuous coverage together with the interfacial adsorption layer, thereby improving the coverage efficiency of the high-temperature friction interface and reducing the risk of localized dry friction. In addition, smaller and more concentrated droplets are less prone to sedimentation and aggregation under gravity and shear, which can significantly improve the structural stability of the emulsion during storage and circulation and reduce nozzle and pipeline blockage or oiling fluctuations. By simultaneously controlling pH and droplet size, stable oil supply and uniform film formation can be achieved in the high-temperature and high-shear environment of ultra-high-speed spinning, allowing the high-temperature resistant functional components in the composite lubricating phase to act on the fiber and guide roller interface in a more consistent manner, thereby further ensuring the stable performance of high-temperature resistance.

[0046] In S400, emulsion-type oils undergo sequential cooling and filtration processes to ensure stable physical properties and emulsion structure during storage, transportation, and metering of the resulting FDY oil, thereby improving the reliability and consistency of the product under ultra-high-speed spinning and high-temperature conditions. Specifically, this includes lowering the system temperature to 25-40°C after emulsification to terminate or slow down the temperature rise and interfacial rearrangement during the emulsification process, followed by staged filtration to remove any possible gels, undissolved matter, agglomerated droplets, and foreign impurity particles. Even after emulsification, the system may still contain a small amount of poorly dispersed oil phase agglomerates or tiny gels caused by the interaction of additives. At the same time, trace amounts of solid impurities may also be mixed into the equipment and pipelines. These heterogeneous components can become the cause of deposition or blockage during subsequent high-temperature operation and cause oiling fluctuations. By cooling to stabilize the emulsion structure and removing potential defective particles through filtration, the instability of oil spraying, filter blockage, and local oil supply abnormalities caused by impurities and agglomerates can be reduced. This indirectly ensures the stable performance of high-temperature resistance in actual spinning conditions and improves the operability of industrial production.

[0047] In practice, controlling the cooling process at 25-40℃ allows the emulsified system to quickly return to near-normal storage and usage conditions, stabilizing emulsion viscosity and interfacial film state. This reduces the risk of droplet co-agglomeration or phase separation caused by temperature changes and facilitates subsequent filtration under more stable rheological conditions, minimizing pressure fluctuations and clogging probability. Simultaneously, 25-40℃ prevents further volatilization or initial oxidation of oil phase components at high temperatures, reducing fumes and sedimentation caused by thermal degradation. Furthermore, antioxidants, preservatives, and defoamers added within this temperature range are less likely to be lost or lose activity due to excessively high temperatures, thus improving product quality consistency and storage stability. Insufficient cooling and excessively high temperatures result in a state of strong molecular motion, making droplet rearrangement and particle size drift more likely, while increasing the risk of volatilization and oxidation. Conversely, excessively low temperatures may lead to increased viscosity or decreased solubility of some components, affecting filtration throughput and increasing the risk of precipitation.

[0048] In practice, the filtration process includes coarse filtration using a 100-200µm filter screen, followed by fine filtration using a 25-80µm filter medium. The aim is to balance filtration efficiency and filter media lifespan while ensuring effective removal of impurities and agglomerates, thereby improving the continuity and cost control of industrial production. Coarse filtration traps larger gel agglomerates, foreign fiber debris, or equipment wear debris, preventing them from directly entering the fine filtration stage and causing rapid clogging and a sudden increase in pressure differential. Fine filtration further removes smaller agglomerated droplets and fine impurity particles, resulting in higher purity of the finished oil and reducing the risk of clogging or wear in nozzles, metering pumps, and pipelines. Since the target particle size of the emulsion system is at the nanometer level, normal droplets are much smaller than the filter pore size and are not trapped. What is trapped are mainly abnormal agglomerates and solid impurities. Through staged filtration, these potentially defective components can be selectively removed while maintaining the main structure of the emulsion, thus improving product purity and operational stability without significantly affecting the target particle size distribution. Compared to single-stage fine filtration, segmented filtration can significantly reduce the load on fine filtration and reduce the frequency of downtime for cleaning due to clogging, making it suitable for continuous industrial production.

[0049] It should be noted that the normal droplet size of the emulsion-type oil agent described in this invention is in the nanometer range, much smaller than the pore size used in staged filtration. Therefore, the filtration process will not trap the main body of normal droplets. The purpose of staged filtration is to remove abnormally large particles such as oil phase agglomerates, gel flocs, and foreign solid impurities that may exist after high-shear emulsification, thereby reducing the risk of clogging in the fuel injection system and reducing the factors that induce deposition in high-temperature areas, thus improving the reliability of the oil agent under industrial circulating fuel supply and high-temperature operating conditions.

[0050] In some embodiments, the addition of at least one or a combination of antioxidants, preservatives, and defoamers after filtration is primarily based on process sequence optimization to maintain the activity of the added components and their impact on emulsion stability. Antioxidants are used to inhibit the thermal oxidation chain reaction in the oil phase during storage and high-temperature use, reducing fumes and sedimentation tendencies caused by oxidative cracking and polymerization. If added too early during high-temperature emulsification or strong shear stages, they may be consumed more quickly or have reduced effective utilization due to localized temperature rise, air entrainment, or interfacial enrichment. Therefore, adding them after cooling and filtration is more beneficial for maintaining their effective content and improving antioxidant stability. Preservatives mainly act on the aqueous phase to inhibit microbial growth during storage and recycling, reducing the risk of off-odors, viscosity drift, or emulsion damage caused by microbial metabolism. Adding them after filtration prevents some preservatives from being adsorbed by the filter media or lost along with trapped gel impurities, thereby improving the effectiveness and long-term stability of the preservative system. Defoamers are used to suppress foam introduced during preparation and filling processes by stirring and conveying, preventing foam from affecting the stability of metered oil application and reducing the risk of emulsion instability and oxidation caused by air entrainment in foam. Adding them after filtration prevents the defoamer from being excessively sheared and dispersed during the high-shear emulsification stage, thus reducing its defoaming efficiency. It also reduces the interference of the defoamer on interface formation during the emulsification process, thereby improving the operability and consistency of the preparation and use process without damaging the emulsion structure. In summary, post-filtration addition can further improve the product's storage stability, process stability, and resistance to degradation during high-temperature use, while ensuring the emulsion's main structure and cleanliness.

[0051] In summary, this invention utilizes thermally stable ester-based oils as a continuous film-forming carrier at the formulation level to reduce basic evaporation losses and provide the material basis for high-temperature lubrication. Oil-soluble ionic liquids, through their polar groups, form a stable adsorption layer at the fiber-metal / ceramic interface, increasing the boundary lubrication ratio and enhancing the continuous coverage of the oil film under high-temperature, high-shear conditions, thereby reducing dry friction and frictional heat accumulation caused by localized oil film rupture. Anti-wear agents provide anti-wear and extreme-pressure protection through adsorption or reaction film formation under high contact stress and high-temperature conditions, reducing shear stress concentration and wear at micro-contact points, and further inhibiting oil cracking and precursor deposition caused by localized hot spots. Emulsifiers and stabilizers construct a fine and uniformly distributed emulsion structure, combined with pH control, ensuring stable dispersion of the oil phase during oiling and circulation, thereby achieving more consistent oil supply and film formation, and avoiding high-temperature lubrication imbalance induced by localized oil richness or lack of oil due to stratification and aggregation.

[0052] Example 1 This embodiment provides a high-temperature resistant ultra-high-speed spinning FDY oiling agent and its preparation method, the preparation method including: S100, Weigh 250g of pentaerythritol tetraisonononate and add it to the reaction vessel. Heat to 60℃ and keep the temperature constant. Under the condition of stirring speed of 500rpm, slowly add 15g of 1-octyl 3-methylimidazolium bis(trifluoromethanesulfonyl)imide and continue mixing for 30min to obtain the oil phase; S200, 8g of trimethylbenzene phosphate was added to the oil phase and stirred for 20min at a stirring speed of 350rpm to obtain a composite lubricating phase; S300: Weigh 694.3g of deionized water and add it to an emulsification kettle. Heat the kettle to 50℃ and maintain the temperature. Then, add 5.0g of dodecyl dimethyl benzyl ammonium chloride, 20g of cocamidopropyl betaine, and 3g of polyvinylpyrrolidone in sequence and stir until they are evenly dissolved to obtain an aqueous phase. While maintaining the system temperature at 50℃, slowly add the composite lubricating phase to the aqueous phase and emulsify at 6000rpm for 6min under high shear. Adjust the pH to 6.8 to obtain an emulsion-type oil with a D50 of 350nm. S400. After cooling the emulsion-type oil to 30℃, filter it. First, use a 150µm filter screen for coarse filtration, and then use a 50µm filter medium for fine filtration. After filtration, add 0.5g tert-butylhydroquinone, 1.0g benzyl alcohol, and 0.2g silicone oil emulsion-type defoamer and stir evenly to obtain FDY oil.

[0053] Example 2 This embodiment provides a high-temperature resistant ultra-high-speed spinning FDY oiling agent and its preparation method, the preparation method including: S100, Weigh 200g of polydiethylene glycol dibenzoate and add it to the reaction vessel, heat to 50℃ and keep the temperature constant, under the condition of stirring speed of 400rpm, slowly add 5g of tetrabutylphosphine bis(2-ethylhexyl) phosphate ionic liquid and continue to mix for 40min to obtain the oil phase; S200, 5g of ashless dithiophosphate was added to the oil phase and stirred for 25min at a stirring speed of 300rpm to obtain a composite lubricating phase; S300: Weigh 752g of deionized water and add it to an emulsification kettle. Heat the kettle to 45℃ and maintain the temperature. Then, add 6.0g of oleylamine polyoxyethylene ether acetate, 15g of fatty alcohol polyoxyethylene ether, and 5g of sodium carboxymethyl cellulose in sequence and stir until dissolved evenly to obtain an aqueous phase. While maintaining the system temperature at 45℃, slowly add the composite lubricating phase to the aqueous phase and emulsify at 5000rpm for 8min under high shear. Adjust the pH to 7.0 to obtain an emulsion-type oil with a D50 of 480nm. S400. After cooling the emulsion-type oil to 35°C, filter it. First, use a 180µm filter screen for coarse filtration, and then use a 40µm filter medium for fine filtration. After filtration, add 0.2g of phenoxyethanol and 0.05g of polyether-modified silicone defoamer and stir evenly to obtain FDY oil.

[0054] Example 3 This embodiment provides a high-temperature resistant ultra-high-speed spinning FDY oiling agent and its preparation method, the preparation method including: S100, weigh 150g pentaerythritol ester and 100g diisooctyl sebacate and add them to the reaction vessel. Heat to 70℃ and keep the temperature constant. Under the condition of stirring speed of 600rpm, slowly add 2g 1-dodecyl-3-methylimidazolium hexafluorophosphate and 20g polypropylene glycol with a number average molecular weight Mn of 600 and continue mixing for 20min to obtain the oil phase. S200, add 3g of sulfurized isobutylene and 2g of ashless dithiocarbamate to the oil phase and stir. Stir for 15 minutes at a stirring speed of 400 rpm to obtain a composite lubricating phase. S300: Weigh 703g of deionized water and add it to an emulsification kettle. Heat the kettle to 55℃ and maintain the temperature. Then, add 6.0g of sodium dodecylbenzenesulfonate, 25g of castor oil polyoxyethylene ether, and 2g of sodium carboxymethyl cellulose in sequence and stir until they are evenly dissolved to obtain an aqueous phase. While maintaining the system temperature at 55℃, slowly add the composite lubricating phase to the aqueous phase and emulsify at 7500rpm for 4min under high shear. Adjust the pH to 6.5 to obtain an emulsion-type oil with a D50 of 280nm. S400. After cooling the emulsion-type oil to 40℃, filter it. First, use a 200µm filter screen for coarse filtration, and then use a 25µm filter medium for fine filtration. After filtration, add 0.1g tert-butylhydroquinone, 0.3g benzyl alcohol and 0.08g silicone oil emulsion defoamer and stir evenly to obtain FDY oil.

[0055] Example 4 This embodiment provides a high-temperature resistant ultra-high-speed spinning FDY oiling agent and its preparation method, the preparation method including: S100, Weigh 240g of diisooctyl sebacate and add it to the reaction vessel. Heat to 60℃ and keep the temperature constant. Under the condition of stirring speed of 500rpm, slowly add 10g of 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide and continue mixing for 30min to obtain the oil phase; S200, 6g of trimethylbenzene phosphate was added to the oil phase and stirred for 20min at a stirring speed of 350rpm to obtain a composite lubricating phase; S300: Weigh 714.0g of deionized water and add it to an emulsification kettle. Heat the kettle to 50℃ and maintain the temperature. Then, add 5.0g of dodecyl dimethyl benzyl ammonium chloride, 18g of fatty alcohol polyoxyethylene ether, and 2.5g of polyvinylpyrrolidone in sequence and stir until they are evenly dissolved to obtain an aqueous phase. While maintaining the system temperature at 50℃, slowly add the composite lubricating phase to the aqueous phase and emulsify at 6500rpm for 6min under high shear. Adjust the pH to 6.8 to obtain an emulsion-type oil with a D50 of 320nm. S400. After cooling the emulsion-type oil to 30°C, it is filtered. First, a 150µm filter screen is used for coarse filtration, and then a 50µm filter medium is used for fine filtration to obtain FDY oil.

[0056] Comparative Example 1 This comparative example provides a high-temperature resistant ultra-high-speed spinning FDY oiling agent and its preparation method. The preparation method is as shown in Example 1, except that: no oil-soluble ionic liquid is added in S100, that is, 15g of 1-octyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide is added, and 265g of pentaerythritol tetraisonononate is added.

[0057] Comparative Example 2 This comparative example provides a high-temperature resistant ultra-high-speed spinning FDY oil and its preparation method. The preparation method is as shown in Example 1, except that: no anti-wear agent is added in S200, that is, there is no S200, and in S100, the pentaerythritol ester is 258g.

[0058] Comparative Example 3 This comparative example provides a high-temperature resistant ultra-high-speed spinning FDY oiling agent and its preparation method. The preparation method is as shown in Example 1, except that: in S400, only a 150µm filter screen is used for coarse filtration, and no fine filtration is performed.

[0059] Comparative Example 4 This comparative example provides a high-temperature resistant ultra-high-speed spinning FDY oiling agent and its preparation method, the preparation method including: Preparation of the oil phase: Mix 250g pentaerythritol ester and 8g trimethylol phosphate, heat to 60℃, and stir to form a homogeneous oil phase; Direct emulsification: The oil phase was added to an aqueous phase at 50°C containing 5.0g dodecyl dimethyl benzyl ammonium chloride, 20g cocamidopropyl betaine, 3g polyvinylpyrrolidone, and 694.3g deionized water, and the mixture was stirred at 800 rpm for 30 min to emulsify and obtain an emulsion-type oil agent. Post-processing: Cool the emulsion-type oil to 30℃, first perform coarse filtration using a 150µm filter screen, and then perform fine filtration using a 50µm filter medium; add 0.5g tert-butylhydroquinone, 1.0g benzyl alcohol, and 0.2g silicone oil emulsion-type defoamer, stir evenly, and the emulsion D50 is measured to be approximately 1450nm.

[0060] Performance testing The FDY oils prepared in Examples 1-4 and Comparative Examples 1-4 were subjected to the following performance tests, and the results are shown in Table 1: High-temperature friction performance: The friction coefficient and wear scar diameter were measured by running a four-ball friction and wear tester at 180℃, 196N, and 1200rpm for 30 minutes. Thermal stability: Take the oil phase and use a thermogravimetric analyzer to heat it at 10℃ / min under nitrogen atmosphere, and record the temperature at which the weight loss is 5%; Simulate high-temperature deposition tendency: Apply 0.5g of oil to a clean aluminum foil, place it in a 200℃ oven and statically heat for 2 hours. After cooling, weigh the residue and calculate the deposition rate. Emulsion stability: The oil was stored in a 50°C constant temperature oven for 30 days. Observe whether it separates into layers and measure the change rate of particle size D50 before and after storage.

[0061] Table 1 As shown in Table 1, comparing Examples 1-3 with Comparative Example 1, the absence of oil-soluble ionic liquid significantly increases the coefficient of friction and wear scar diameter, increases the deposition rate, and decreases thermal stability. Comparing Example 1 with Comparative Example 2, the lack of anti-wear agent leads to increased wear scar diameter and deposition rate, indicating that anti-wear agent plays an important role in reducing wear and inhibiting the formation of deposits through tribochemical reactions at high temperatures. Comparing Example 1 with Comparative Example 3, although the friction and thermal data are similar, Comparative Example 3 has a higher deposition rate and worse stability. Comparing Example 1 with Comparative Example 4, the performance of the conventionally low-speed emulsified sample deteriorates significantly, especially with a high deposition rate and severe emulsion instability. Comparing Example 4 with Example 1, its stability and deposition rate are slightly worse, indicating the further optimization effect of post-added components such as antioxidants and defoamers on the overall product performance. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of this invention; therefore, the scope of protection of this invention should be determined by the scope defined in the claims.

Claims

1. A method for preparing a high-temperature resistant ultra-high-speed spinning FDY oiling agent, characterized in that, The preparation method includes: S100: Heat the base oil to 40-70℃, add the oil-soluble ionic liquid and mix to obtain the oil phase; S200: An anti-wear agent is added to the oil phase and stirred to obtain a composite lubricating phase; S300. The composite lubricating phase is added to the aqueous phase and subjected to high-shear emulsification at 40-60°C to obtain an emulsion-type oil. S400: The emulsion-type oil agent is subjected to cooling and filtration treatments in sequence to obtain the FDY oil agent; The aqueous phase includes antistatic agents, stabilizers, and emulsifiers; The base oil includes at least one or a combination of polydiethylene glycol esters, pentaerythritol esters, and diisooctyl sebacate; The oil-soluble ionic liquid includes at least one or a combination of imidazole ionic liquids with C6-C18 alkyl substitution, tetraalkyl quaternary ammonium ionic liquids, and tetraalkylphosphonium ionic liquids; the amount of the oil-soluble ionic liquid added is 0.1-5% of the total mass of the FDY oil agent; The anti-wear agent includes at least one or a combination of aryl phosphates, isobutylene sulfide, ashless dithiophosphates, and ashless dithiocarbamates; the amount of the anti-wear agent added is 0.05-3% of the total mass of the FDY oil.

2. The preparation method according to claim 1, characterized in that, The emulsifier includes at least one or a combination of nonionic emulsifiers and amphoteric emulsifiers; and / or The amount of emulsifier added is 0.2-5.0% of the total mass of the FDY oil; and / or The stabilizer includes at least one or a combination of polyvinylpyrrolidone, sodium carboxymethyl cellulose, and / or The amount of stabilizer added is 0.05-1.0% of the total mass of the FDY oil; and / or The antistatic agent includes at least one or a combination of quaternary ammonium salt type antistatic agents, amine salt type antistatic agents, sulfonate type antistatic agents, zwitterionic type antistatic agents, and polyether type antistatic agents; and / or The amount of antistatic agent added is 0.1-3.0% of the total mass of the FDY oil.

3. The preparation method according to claim 1, characterized in that, In S100, the mixing process is carried out at a rotation speed of 300-800 rpm for a time of 15-45 min.

4. The preparation method according to claim 1, characterized in that, In S200, the stirring speed is 200-600 rpm and the time is 10-30 min.

5. The preparation method according to claim 1, characterized in that, In S300, the high-shear treatment is performed at a rotation speed of 3000-8000 rpm for a time of 3-10 min; and / or The emulsion-type oil has a pH value of 6.0-7.5 and a D50 of 200-600 nm.

6. The preparation method according to claim 1, characterized in that, In S400, The filtration process includes first performing coarse filtration using a 100-200µm filter screen, followed by fine filtration using a 25-80µm filter medium; and / or The cooling process is carried out at a temperature of 25-40℃.

7. The preparation method according to any one of claims 1 to 6, characterized in that, In S100, the oil phase further includes the addition of low molecular weight polyether; The low molecular weight polyether has a number average molecular weight Mn of 200-2000, and the amount of low molecular weight polyether added is 0.2-8% of the total mass of the FDY oil.

8. The preparation method according to claim 1, wherein in S400, after the filtration process, the method further comprises: Add at least one or a combination of antioxidants, preservatives and defoamers.

9. The preparation method according to claim 8, characterized in that, The antioxidant includes tert-butylhydroquinone, and the amount of the antioxidant added is 0.01-0.20% of the total mass of the FDY oil; and / or The preservative includes benzyl alcohol or phenoxyethanol, and the amount of the preservative added is 0.02-0.50% of the total mass of the FDY oil; and / or The defoamer includes a silicone oil emulsion type defoamer or a polyether modified silicone defoamer, and the amount of the defoamer added is 0.005-0.10% of the total mass of the FDY oil.

10. A high-temperature resistant ultra-high-speed spinning FDY oiling agent, characterized in that, The FDY oil is obtained by the preparation method according to any one of claims 1 to 9.

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