Polyester oiling agent for high-speed spinning

Abstract

The invention belongs to the technical field of textile assistants, and particularly relates to a polyester oiling agent for high-speed spinning, the polyester oiling agent comprises, by weight, 40-60 parts of a smoothing agent, 10-20 parts of an emulsifier, 5-20 parts of an antistatic agent, 5-10 parts of a bundling agent, and 5-15 parts of oil-containing lubricating particles, the oil-containing lubricating particles comprise a core suspension and a shell layer coating the outer side of the core suspension, and the shell layer is a polyester oiling agent. The core suspension comprises an oily dispersion medium and inorganic nano lubricating particles dispersed in the oily dispersion medium, and the shell layer is of a temperature-sensitive reversible cross-linked network structure. According to the polyester oiling agent for high-speed spinning, the anti-wear and anti-friction performance, the lubricating performance, the stability and the anti-agglomeration capacity of the oiling agent are improved by optimizing the adding mode of the nano particles.

Description

Technical Field

[0001] The present invention belongs to the technical field of spinning aids, and particularly relates to a polyester oil agent for high-speed spinning. Background Art

[0002] Synthetic chemical fibers are high-molecular compounds directly polymerized from compounds. During the spinning process, friction and static electricity will be generated. Therefore, it is necessary to use aids to make the fibers soft and smooth, and also to use aids to eliminate the accumulation of static electricity. Such aids are collectively referred to as spinning oil agents. The spinning oil agent forms an oil film on the fiber surface to protect the fiber, making the fiber have a certain smoothness, reducing or even completely eliminating the damage of the fiber during the friction process, and making the fiber have a good hand feeling. Polyester fibers have the advantages of high strength, good wear resistance, strong wrinkle resistance, excellent dimensional stability, and good resistance to chemical substances such as acids and alkalis. They are widely used in clothing textiles, home furnishings, industrial textiles, medical supplies, emerging fields, etc. It is the most widely used and the largest synthetic fiber variety in the world in terms of production. Its output has long ranked first among synthetic fibers and occupies a core position in synthetic fibers.

[0003] In recent years, with the progress of textile industrial technology, the operating speed of modern spinning equipment has increased significantly. For example, the spinning speed of polyester filament can reach more than 5000 m / min, which requires the oil agent to have stronger permeability, lubricity, bundling property, anti-splashing ability and heat resistance. At present,

[0004] In the process of developing the oil agent, although many existing technologies have shown that: nanoparticles have a layered or spherical structure, can form a ball bearing effect or a self-lubricating film on the surface of the friction pair, and significantly reduce the friction coefficient of the contact surface. At the same time, nanoparticles can be embedded in the worn surface during the friction process, fill the micro-pits and polish the rough peaks, reduce the surface roughness, and reduce the ploughing effect, thereby improving the lubrication effect. However, its application research in spinning oil agents is still in its infancy, and fewer nanoparticles are added to the oil agent to achieve the effect of anti-wear and friction reduction. The reasons are mainly as follows: First, nanoparticles usually have no lipophilicity, and have a very high specific surface area and surface energy, and are prone to agglomeration. In the emulsion system of the spinning oil agent, there are problems such as weak stability, poor compatibility with oily components, and easy agglomeration of nanoparticles. If the nanoparticles cannot be evenly dispersed, large particles or aggregates will be formed. These particles or aggregates not only cannot play the lubricating and friction-reducing role of nanoparticles, but may instead wear the fiber surface and become a defect source on the fiber surface, resulting in fiber surface defects; Second, the working environment of spinning oil is quite different from that of other lubrication systems, and it is difficult for nanoparticles to adhere to the fiber surface. Specifically, there are currently two main ways to apply spinning oil: nozzle oiling and tanker oiling. Nozzle oiling is a method of spraying the oil directly onto the filament bundle in the form of mist or thin stream through a nozzle (nozzle), and tanker oiling is a method of applying the oil to the filament bundle through an oil tanker (oiling roller). During the oiling process, due to the small diameter of the fiber, the attachment surface of the oil is small, and the subsequent spinning process is accompanied by a large ratio of fiber deformation, which makes it difficult for the nanoparticles in the oil to adhere to the fiber surface. Even if they are successfully attached to the fiber surface, they are very easy to fall off due to friction, stretching and deformation during the spinning deformation process. Therefore, the nanoparticles added to the oil often find it difficult to play their lubricating and friction-reducing roles; Third, the addition of nanoparticles can easily lead to clogging of the oiling equipment. Since the oil needs to be applied to the oil nozzle or oil tanker by dripping or spraying through the oil spray port, and the flow rate of the oil applied to a single oil nozzle or oil tanker is very small, the cross-section of the oil nozzle or oil spray port is extremely small. When oiling, nanoparticles can easily cause clogging of the oiling equipment and interruption of the spinning process due to agglomeration or deposition.

[0005] In view of this, the present invention improves the method of adding nanoparticles and proposes a polyester oil agent for high-speed spinning that can effectively utilize the lubrication and friction reduction effect of nanoparticles. Summary of the invention

[0006] The purpose of the present invention is to provide a polyester oil for high-speed spinning that can effectively improve the effect of the oil by means of the lubricating and friction-reducing effect of nanoparticles in order to solve the above-mentioned technical problems.

[0007] In view of this, the present invention provides a polyester oil agent for high-speed spinning, which comprises, by weight: 40-60 parts of a smoothing agent, 10-20 parts of an emulsifier, 5-20 parts of an antistatic agent, 5-10 parts of a sizing agent, and 5-15 parts of oil-containing lubricating particles, wherein the oil-containing lubricating particles comprise a core suspension and a shell layer coated on the outside of the core suspension, wherein the core suspension comprises an oily dispersion medium and inorganic nano-lubricating particles dispersed in the oily dispersion medium, and the shell layer is a temperature-sensitive reversible cross-linked network structure.

[0008] Furthermore, the shell layer is an amphiphilic temperature-sensitive reversible cross-linked network structure.

[0009] Further, the shell layer includes: a cross-linked network; The cross-linked network is a temperature-sensitive reversible cross-linked network structure formed by the reaction and cross-linking of Pluronic-NHS with a water-soluble high molecular polymer containing hydroxyl groups.

[0010] Furthermore, star nodes are attached to the crosslinked network in the shell layer, and the star nodes are formed by inorganic nanoparticles attaching to the crosslinked network.

[0011] Furthermore, the star nodes are inorganic nanoparticles attached to the Pluronic-NHS and / or a water-soluble polymer chain segment containing a hydroxyl group.

[0012] Furthermore, the star nodes are inorganic nanoparticles attached to the water-soluble polymer chain segment containing a hydroxyl group.

[0013] Furthermore, the smoothing agent is a mixture of mineral oil, synthetic fatty acid ester, and polyether, wherein the mass ratio of mineral oil, synthetic fatty acid ester, and polyether is (1-3):(3-5):(2-4).

[0014] Furthermore, the preparation process of the polyester oil agent for high-speed spinning is as follows: S1, Pretreatment of inorganic nano lubricating particles: First, disperse the inorganic nano lubricating particles into a soluble calcium salt solution, then dropwise add fatty acid salt, react at room temperature with stirring for 10-30 min, and then separate and dry to obtain the pretreated inorganic nano lubricating particles; S2, Preparation of the core suspension: Disperse the inorganic nano lubricating particles pretreated in step S1 into an oily dispersion medium, and after uniform dispersion, obtain the core suspension; S3, Preparation of oil-containing lubricating particles: Disperse the core suspension prepared in step S2 and Pluronic-NHS in an organic solvent to obtain a mixed system a, and mix a water-soluble polymer, deionized water, and an emulsifier, and stir well to obtain a mixed system b. Then slowly add the mixed system a to the mixed system b. After the addition is completed, emulsify under ultrasound at 5-18 °C for 10-20 min, then distill off the organic solvent to obtain a dispersion of oil-containing lubricating particles, and then lyophilize the dispersion of oil-containing lubricating particles to obtain oil-containing lubricating particles; S4, Preparation of the oil phase: Mix appropriate amounts of a smoothing agent, an emulsifier, an antistatic agent, and a bundling agent according to the weight ratio of the smoothing agent, emulsifier, antistatic agent, and bundling agent in the polyester oil agent, and stir well to obtain the oil phase; S5, Preparation of the polyester oil agent for high-speed spinning: Disperse the oil-containing lubricating particles prepared in step S3 into the oil phase prepared in step S4. First, stir at 5-15 °C for 20-30 min, then raise the temperature to 30-40 °C and stir for 5-10 min to obtain the polyester oil agent for high-speed spinning.

[0015] Further, the mixed system b in step S3 further includes inorganic nano-particles, and the addition amount of the inorganic nano-particles is 0.5 to 3 times that of the water-soluble polymer. In step S3, the preparation process of the mixed system b is as follows: Dissolve the water-soluble polymer in deionized water according to the weight ratio to prepare an aqueous solution, then disperse the inorganic nano-particles and the emulsifier into the aqueous solution of the water-soluble polymer, and stir until evenly dispersed to obtain the mixed system b; Or, First, dissolve the water-soluble polymer in 30 to 50 wt% of deionized water in the formula amount to prepare an aqueous solution, then disperse the inorganic nano-particles and the emulsifier into the aqueous solution of the water-soluble polymer, stir until evenly dispersed, add the remaining deionized water and stir evenly to obtain the mixed system b.

[0016] Further, the preparation process of the mixed system b in step S3 is as follows: Dissolve 2 to 10 parts by weight of sodium silicate in 10 to 40 parts by weight of deionized water, stir to dissolve it completely to obtain a sodium silicate aqueous solution; take 1 to 3 parts by weight of the water-soluble polymer and dissolve it in the remaining deionized water, then slowly drop the sodium silicate aqueous solution into the aqueous solution of the water-soluble polymer. After dropping, use an acid solution to adjust the pH of the mixture to 7 to 8, and react for 2 to 3 h under low-speed stirring, then add the emulsifier in the formula amount to obtain the mixed system b.

[0017] The beneficial effects of the present invention are: The polyester oil agent for high-speed spinning described in the present invention has the following advantages: First, Pluronic-NHS reacts with the water-soluble polymer containing hydroxyl groups and cross-links to form a shell layer covering the outside of the core suspension. Under the covering, separation and sealing effects of the shell layer, the inorganic nano-lubricating particles in the core suspension are not easily flowed out of the shell layer. In this way, the purpose of separating the core suspension containing inorganic nano-lubricating particles into multiple micro-units through the shell layer is achieved. The core suspension and the inorganic nano-lubricating particles in different micro-units are not easily in direct contact. In this way, large-scale agglomeration between the inorganic nano-lubricating particles can be inhibited, so that they are evenly dispersed in the oil agent and the stability of the oil agent is improved; Second, the inorganic nano-lubricating particles can be well immersed in the oily dispersion medium in the core suspension, realizing the free sliding or rotation of the inorganic nano-lubricating particles during use, and giving full play to the anti-wear and friction-reducing effects; Third, during use, as the temperature of the oil agent rises, the shell layer in the oil-containing lubricating particles can rapidly reduce its size through the sol-gel phase transition, releasing a part of the oily dispersion medium therein, forming a stronger, more complete oil film covering the fiber surface. While improving the lubrication effect of the oil agent, it can also enhance the lipophilicity of the oil-containing lubricating particles, promote the good fusion of the oil-containing lubricating particles and the oil film, making it difficult for the oil-containing lubricating particles to fall off from the fiber surface. At the same time, the oily dispersion medium released by the oil-containing lubricating particles can also achieve the self-lubrication of the oil-containing lubricating particles; Fourth, different from the existing technology of directly adding inorganic nanoparticles, the inorganic nano-lubricating particles in the oil-containing lubricating particles come into contact with the fiber through a soft oil-containing shell layer and the oily dispersion medium contained in the shell layer. During the friction process, on the one hand, this oil-containing soft shell layer can buffer the impact of the inorganic nano-lubricating particles on the friction pair, avoiding the hard particles from directly scratching the fiber surface or the equipment surface; on the other hand, this oil-containing soft shell layer has certain elasticity and deformation ability, and can form an adaptive effect on the friction pair surface, filling the microscopic unevenness on the fiber surface, improving the friction surface, and further reducing friction and wear; Fifth, the inorganic nano-lubricating particles are easily attached to the fiber surface: the inorganic nano-lubricating particles provided by the present invention are attached to the fiber through the segments in the cross-linked network and the oil phase coated therein. Compared with the direct attachment of inorganic nano-lubricating particles, the oil-containing cross-linked network has a lower surface tension and good lubricity, making it easier for the oil-containing lubricating particles to spread and attach on the fiber surface; at the same time, the functional groups in the networked macromolecules in the oil-containing cross-linked network can chemically react with the active groups on the fiber surface to form chemical bonding, thereby significantly improving the attachment stability of the inorganic particles; in addition, the network macromolecule segments are easily entangled and embedded with the microscopic structure on the fiber surface to form mechanical connections, further enhancing the binding force between the oil-containing lubricating particles and the fiber; Sixth, on this basis, the present invention forms calcium fatty acid by reacting fatty acid salt in clarified lime water, and the calcium fatty acid deposits on the surface of the inorganic nano-lubricating particles, which can improve its surface properties and enable it to disperse more uniformly and stably in the oil phase.

[0018] Seventh, the present invention sets star nodes on the cross-linked network. On the one hand, the introduction of star nodes can enhance the cross-linked network; on the other hand, the inorganic nano-particles attached to the cross-linked network can achieve a microscopic structure similar to a "ball bearing", and it can move within a short distance, but it is not easy to move over a long distance due to the restraint of the segments. In this way, the star nodes on it can be fixed within a specific range through the cross-linked network, which can play an anti-friction and wear-reducing role while not being prone to agglomeration.

[0019] Eighth, in the present invention, the uniformity of the star nodes and the binding stability between the inorganic nanoparticles and the network chains of the water-soluble polymer are also improved by means of reactive in-situ deposition, and finally a star node with a degree of freedom of movement restricted by polymer segments over a long distance but capable of short-distance movement and arranged in a certain manner is obtained. While playing the role of anti-wear and friction reduction, it can also stably adhere to the fiber and effectively prevent the occurrence of agglomeration.

[0020] In summary, the polyester spinning finish described in the present invention improves the anti-wear and friction reduction performance, lubrication performance, stability and anti-agglomeration ability of the finish by optimizing the addition method of the nanoparticles. Brief Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the oil-containing lubricating particles in the finish described in the present invention; Figure 2 is another schematic structural diagram of the oil-containing lubricating particles in the finish described in the present invention; The markings in the figure are indicated as: 1, shell layer, 101, cross-linked network; 102, star node; 2, core suspension, 201, inorganic nano-lubricating particles. Detailed Embodiments

[0022] Next, the technical solutions in the embodiments of the present application will be clearly described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0023] In the description of the present application, it should be noted that the terms used here are only for describing specific embodiments, rather than intending to limit the exemplary embodiments according to the present application. For the sake of description, technologies, methods and devices known to those of ordinary skill in the relevant field may not be discussed in detail, but where appropriate, the technologies, methods and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0024] It should be noted that in this application, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0025] A polyester finish for high-speed spinning, by weight, includes: 40 - 60 parts of a smoothing agent, 10 - 20 parts of an emulsifier, 5 - 20 parts of an antistatic agent, 5 - 10 parts of a bundling agent, and 5 - 15 parts of oil-containing lubricating particles. The oil-containing lubricating particles include a core suspension 2 and a shell layer 1 coated on the outside of the core suspension 2. The core suspension 2 includes an oily dispersion medium and inorganic nano-lubricating particles 201 dispersed in the oily dispersion medium. The shell layer 1 is a thermosensitive reversible crosslinked network structure.

[0026] Preferably, the shell layer 1 is an amphiphilic thermosensitive reversible crosslinked network structure.

[0027] Furthermore, the shell layer 1 includes: a crosslinked network 101, which is a thermosensitive reversible crosslinked network structure formed by the reaction and crosslinking of Pluronic-NHS with a water-soluble high molecular polymer containing hydroxyl groups, with different chain segments interpenetrating and interlocking with each other.

[0028] As some examples of the present invention, the water-soluble high molecular polymer for preparing the crosslinked network 101 is selected from one or more of carboxymethyl cellulose (CMC), hydroxypropyl methyl cellulose (HPMC), polyvinyl alcohol (PVA), polyethylene glycol (PEG), starch, chitosan and its derivatives, hyaluronic acid (HA), etc.

[0029] In addition, it should be noted that the preparation process of the Pluronic-NHS used in the present invention is a prior art, and specifically, reference can be made to the Chinese patent application with the application number 202410264898.7. The preparation principle of the crosslinked network 101 is as follows: Carboxymethyl cellulose (CMC), hydroxypropyl methyl cellulose (HPMC), polyvinyl alcohol (PVA), polyethylene glycol (PEG), starch, chitosan and its derivatives, and hyaluronic acid (HA) in it can react and crosslink with Pluronic-NHS through the hydroxyl groups on their molecular chains to form the temperature-sensitive reversible crosslinked network structure.

[0030] Preferably, the water-soluble polymer for preparing the crosslinked network 101 is selected from one or more of carboxymethyl cellulose (CMC), hydroxypropyl methyl cellulose (HPMC), polyvinyl alcohol (PVA), polyethylene glycol (PEG), and starch.

[0031] Furthermore, the HLB value of the Pluronic raw material for preparing the Pluronic-NHS is < 10, and preferably it is 5 - 9.

[0032] As some examples of the present invention, the Pluronic is selected from one or more of P123, L121, L101, L81, L61, L31, etc.

[0033] As some examples of the present invention, the particle size of the inorganic nano-lubricating particles 201 is ≤ 100 nm, and the inorganic nano-lubricating particles 201 are selected from one or more of calcium carbonate, titanium dioxide, silicon dioxide, boron nitride, cadmium sulfide, graphite, carbon nanotubes, etc.

[0034] Furthermore, star nodes 102 are attached to the crosslinked network 101 in the shell 1, and the star nodes 102 are formed by attaching inorganic nano-particles to the crosslinked network 101.

[0035] Specifically, the star node 102 is an inorganic nano-particle attached to the Pluronic-NHS and / or the water-soluble polymer chain segment containing hydroxyl groups.

[0036] Preferably, the star node 102 is an inorganic nano-particle attached to the water-soluble polymer chain segment containing hydroxyl groups.

[0037] As some examples of the present invention, the smoothing agent is selected from one or more of mineral oil, vegetable oil, natural or synthetic fatty acid esters, fatty alcohols, or fatty acid polyethers, etc.

[0038] Preferably, the smoothing agent is a mixture of mineral oil, synthetic fatty acid ester, and polyether, wherein the mass ratio of mineral oil, synthetic fatty acid ester, and polyether is (1 - 3):(3 - 5):(2 - 4).

[0039] Preferably, the polyether is selected from one or more of linear fatty alcohol polyoxyethylene ethers, branched fatty alcohol polyoxyethylene ethers, etc.

[0040] As some examples of the present invention, the emulsifier is selected from one or more of sorbitan fatty acid esters, polyethylene glycol fatty acid esters, castor oil polyoxyethylene ethers, sodium lauryl ether sulfate, N-methyl amide carboxylates, sorbitan fatty acid ester polyoxyethylene ethers, polyoxyethylene cholesterol ethers, etc.

[0041] As some examples of the present invention, the antistatic agent is selected from one or more of quaternary ammonium salts, alkyl phosphate salts, alkyl polyoxyethylene ether phosphate salts, alkyl sulfate salts, alkyl alcohol phosphate polyoxyethylene ethers, alkyl sulfonates, etc.

[0042] As some examples of the present invention, the bundling agent is selected from one or more of coconut diethanolamide, triethanolamine oleate, polyethylene glycol laurate, polyoxyethylene laurate, glycerol random polyether, N-acyl amino acid salts, etc.

[0043] As some examples of the present invention, the polyester spinning finish for high-speed spinning further includes 1-3 parts by weight of additives such as antioxidants and defoamers.

[0044] In addition, the present invention also provides a preparation method of the above-mentioned polyester spinning finish for high-speed spinning, which is specifically as follows: S1, Pretreatment of inorganic nano lubricating particles: First, disperse the inorganic nano lubricating particles into a soluble calcium salt solution, then dropwise add fatty acid salts, react at room temperature with stirring for 10-30 minutes, and then separate and dry to obtain the pretreated inorganic nano lubricating particles; S2, Preparation of the core suspension: Disperse the inorganic nano lubricating particles pretreated in step S1 into an oily dispersion medium, and after uniform dispersion, obtain the core suspension; S3, Preparation of oil-containing lubricating particles: Disperse the core suspension prepared in step S2 and Pluronic-NHS in an organic solvent to obtain a mixed system a, and mix a water-soluble polymer, deionized water and an emulsifier, and stir well to obtain a mixed system b. Then slowly add the mixed system a to the mixed system b. After the addition is completed, emulsify under ultrasound at 5-18°C for 10-20 minutes, then distill off the organic solvent to obtain a dispersion of oil-containing lubricating particles, and then lyophilize the dispersion of oil-containing lubricating particles to obtain oil-containing lubricating particles; S4, Preparation of the oil phase: Mix appropriate amounts of a smoothing agent, an emulsifier, an antistatic agent and a bundling agent according to the weight ratio of the smoothing agent, emulsifier, antistatic agent and bundling agent in the polyester spinning finish, and stir well to obtain the oil phase; Preparation of polyester oil agent for high-speed spinning: The oil-containing lubricating particles prepared in step S3 are dispersed into the oil phase prepared in step S4. First, at 5 - 15°C, after stirring for 20 - 30 min, the temperature is raised to 30 - 40°C and stirred for 5 - 10 min to obtain the polyester oil agent for high-speed spinning.

[0045] Preferably, in the step S1, the fatty acid salt is a salt compound formed by the reaction of fatty acid with sodium hydroxide or potassium hydroxide, and its structural general formula is R - COO - M + , where R is a hydrocarbon group and M is a monovalent metal cation, such as Na + 、K + and so on.

[0046] As some examples of the present invention, the fatty acid salt is selected from one or more of potassium laurate, sodium oleate, potassium oleate, sodium stearate, sodium laurate, sodium myristate, sodium palmitate, potassium linoleate, etc.

[0047] Preferably, the fatty acid salt is selected from one or more of sodium oleate, potassium oleate, sodium stearate, potassium stearate, etc.

[0048] Preferably, in the step S1, before dispersing the inorganic nano-lubricating particles into the soluble calcium salt solution, the inorganic nano-lubricating particles can be pre-treated with dopamine or the like for surface modification to improve the adsorption capacity of the inorganic nano-lubricating particles for the generated calcium fatty acid, and to improve the adhesion rate and adhesion stability of calcium fatty acid on the surface of the inorganic nano-lubricating particles.

[0049] As some examples of the present invention, the process of surface modification of the inorganic nano-lubricating particles with dopamine is as follows: First, 1 - 3 parts by weight of dopamine powder and 10 - 20 parts by weight of water are mixed, and after stirring to fully dissolve the dopamine powder, 5 - 10 parts by weight of inorganic nano-lubricating particles are added and stirred to disperse the inorganic nano-lubricating particles evenly. Then, 100 - 150 parts by weight of an alkaline solution with a concentration of 5 - 10 wt% is added, and after reacting under stirring for 10 - 20 h, centrifugation, washing, filtration, and drying are carried out to obtain the inorganic nano-lubricating particles with polydopamine surface modification.

[0050] Preferably, when using polydopamine for surface modification of the inorganic nano-lubricating particles, stirring and reaction should be carried out under light-shielded conditions.

[0051] Further, in the step S1, the addition amount of the fatty acid salt is 15-25% of the weight of the inorganic nano-lubricating particles, the concentration of calcium ions in the soluble calcium salt solution is 0.1-1 mol / L, and the content of the inorganic nano-lubricating particles in the soluble calcium salt solution is 5-15 wt%.

[0052] As some examples of the present invention, the soluble calcium salt solution is calcium chloride, calcium nitrate, etc.

[0053] Further, in the step S2, the selection of the oily dispersion medium can be referred to the foregoing smoothness. For example, the oily dispersion medium can be selected from one or more of mineral oil, vegetable oil, natural or synthetic fatty acid esters, fatty alcohols or fatty acid polyethers, etc.

[0054] Preferably, the oily dispersion medium is a mixture of natural or synthetic fatty acid esters and vegetable oil, wherein the mass ratio of natural or synthetic fatty acid esters to vegetable oil is (6-8):(2-4).

[0055] Compared with other oily dispersion media, fatty acid ester molecules have long-chain alkyl groups and polar ester groups, which can bind to the surface of nanoparticles through hydrophobic interaction. At the same time, the polarity of the ester group can form hydrogen bonds or electrostatic interactions with the particle surface, enhancing the dispersion stability. In addition, the surface tension of fatty acid esters is relatively low, which helps to wet the surface of nanoparticles and reduce the tendency of aggregation. At the same time, vegetable oil contains a triglyceride structure and has a certain polarity, which can also interact with the surface of nanoparticles and promote the stable dispersion of nanoparticles in the oily dispersion medium.

[0056] Preferably, in the core suspension, the content of the inorganic nano-lubricating particles is 4-10 wt%.

[0057] Further, in the mixed system a in the step S3, the weight addition ratio of the core suspension, Pluronic-NHS and organic solvent is (5-15):(1-3):(100-300).

[0058] Further, in the mixed system b in the step S3, the weight addition ratio of the water-soluble polymer, emulsifier and deionized water is (1-3):(5-20):(150-300).

[0059] Further, in the step S3, the weight ratio of Pluronic-NHS to the water-soluble polymer is (1-1.3):1.

[0060] Further, the mixed system b in step S3 further includes inorganic nanoparticles, the particle size of the inorganic nanoparticles ≤ 10 nm, and the inorganic nanoparticles adhere to the crosslinked network 101 to form the star node 102.

[0061] As some examples of the present invention, in step S3, the preparation process of the mixed system b is as follows: First, dissolve the water-soluble polymer in deionized water according to the weight ratio to prepare an aqueous solution, then disperse the inorganic nanoparticles and the emulsifier into the aqueous solution of the water-soluble polymer, and stir until evenly dispersed to obtain the mixed system b.

[0062] In the mixed system b, the addition amount of the inorganic nanoparticles is 0.5 to 3 times the addition amount of the water-soluble polymer.

[0063] Preferably, in the preparation process of the mixed system b, the water-soluble polymer can be first dissolved in 30 to 50 wt% of deionized water in the formula amount to prepare an aqueous solution, then the inorganic nanoparticles and the emulsifier are dispersed into the aqueous solution of the water-soluble polymer, stirred until evenly dispersed, and then the remaining deionized water is added and stirred evenly to obtain the mixed system b.

[0064] This step-by-step operation of adding water can make the polymer chains contact the inorganic nanoparticles more fully in the initial stage and improve the adhesion efficiency of the inorganic nanoparticles.

[0065] In the above process, the water-soluble polymer can form a three-dimensional network structure in water by using a large number of hydrophilic groups contained therein, such as hydroxyl groups. The stretching and entanglement of such molecular chains can form a physical barrier, produce a steric hindrance effect, hinder the aggregation of nanoparticles, and fix them on the network chains through adsorption. The surface of the inorganic nanoparticles usually carries charges or polar groups, and can be combined with the hydrophilic groups on the polymer chains through electrostatic interaction, hydrogen bond or van der Waals force. At the same time, the inorganic nanoparticles adsorbed on the network chains remain dispersed due to the steric hindrance effect, reducing the tendency of aggregation.

[0066] Furthermore, when preparing the mixed system b, the star node 102 can also be formed by the method of reactive in-situ deposition to improve the binding stability between the inorganic nanoparticles and the network chains of the water-soluble polymer.

[0067] As some examples of the present invention, the process of improving the binding stability between the inorganic nanoparticles and the network chains of the water-soluble polymer by the method of reactive in-situ deposition is as follows: Dissolve 2 to 10 parts by weight of sodium silicate in 10 to 40 parts by weight of deionized water, stir to fully dissolve it, and obtain an aqueous sodium silicate solution; take 1 to 3 parts by weight of a water-soluble polymer and dissolve it in the remaining deionized water, then slowly add the aqueous sodium silicate solution dropwise to the aqueous solution of the water-soluble polymer. After the addition is complete, use an acid solution to adjust the pH of the mixture to 7 to 8, and react for 2 to 3 hours under low-speed stirring, and then add the formulated amount of emulsifier to obtain the mixed system b.

[0068] Further, in the step S3, after distilling off the organic solvent to obtain a dispersion liquid containing oil-lubricating particles, it can be heated to 35 to 55 °C, kept warm for 3 to 5 minutes, then surfactant SDS is added, and stirred at the current temperature for 5 to 10 minutes, and then freeze-dried to obtain oil-lubricating particles.

[0069] Preferably, in the step S3, the addition amount of the surfactant SDS is 0.01 to 0.03% of the weight of the water-soluble polymer in the dispersion liquid of the oil-lubricating particles. The negatively charged hydrophilic group in the surfactant SDS can interact with the hydroxyl groups on the molecular chain of the water-soluble polymer, reducing the number of hydroxyl groups in the dispersion liquid system of the oil-lubricating particles, especially on the surface of the oil-lubricating particles, and improving the dispersion stability of the oil-lubricating particles.

[0070] The polyester oil agent for high-speed spinning described in the present invention has the following advantages: First, Pluronic-NHS reacts and crosslinks with a water-soluble polymer containing hydroxyl groups to form a shell layer 1 coated on the outside of the core suspension 2. Under the coating, separation and sealing effects of the shell layer 1, the inorganic nano-lubricating particles 201 in the core suspension 2 are not easily flowed out from the shell layer 1. In this way, the purpose of separating the core suspension 2 containing inorganic nano-lubricating particles 201 into multiple micro-units through the shell layer 1 is achieved. The core suspension 2 and the inorganic nano-lubricating particles 201 in different micro-units are not easily in direct contact. In this way, large-scale aggregation between the inorganic nano-lubricating particles 201 can be inhibited, so that they are uniformly dispersed in the oil agent and the stability of the oil agent is improved; Second, the inorganic nano-lubricating particles 201 can be well immersed in the oily dispersion medium in the core suspension 2, realizing the free sliding or rotation of the inorganic nano-lubricating particles 201 during use, and giving full play to the anti-wear and friction-reducing effects; Third, during use, as the temperature of the oil agent rises, the shell layer 1 in the oil-containing lubricating particles can rapidly reduce its size through sol-gel phase transition, release some of the oily dispersion medium therein, form a stronger, more complete oil film covering the fiber surface. While improving the lubrication effect of the oil agent, it can also enhance the lipophilicity of the oil-containing lubricating particles, promote the good fusion of the oil-containing lubricating particles and the oil film, making it difficult for the oil-containing lubricating particles to fall off the fiber surface. At the same time, the oily dispersion medium released by the oil-containing lubricating particles can also achieve the self-lubrication of the oil-containing lubricating particles; Fourth, different from the existing technology of directly adding inorganic nanoparticles, the inorganic nano-lubricating particles 201 in the oil-containing lubricating particles contact the fiber through a soft oil-containing shell layer 1 and the oily dispersion medium contained in the shell layer 1. During the friction process, on the one hand, this oil-containing soft shell layer 1 can buffer the impact of the inorganic nano-lubricating particles 201 on the friction pair, avoiding direct scratching of the fiber surface or the equipment surface by the hard particles; on the other hand, this oil-containing soft shell layer 1 has certain elasticity and deformation ability, can form an adaptive effect on the friction pair surface, fill the microscopic unevenness on the fiber surface, improve the friction surface, and further reduce friction and wear; Fifth, the inorganic nano-lubricating particles 201 are easily attached to the fiber surface: The inorganic nano-lubricating particles 201 provided by the present invention are attached to the fiber through the segments in the crosslinked network 101 and the oil phase coated therein. Compared with the direct attachment of the inorganic nano-lubricating particles 201, the oil-containing crosslinked network 101 has a lower surface tension and good lubricity, making it easier for the oil-containing lubricating particles to spread and attach on the fiber surface; at the same time, the functional groups in the network macromolecules in the oil-containing crosslinked network 101 can chemically react with the active groups on the fiber surface to form chemical bonding, thereby significantly improving the attachment stability of the inorganic particles; in addition, the network macromolecule segments are easily entangled and embedded with the microscopic structure on the fiber surface to form mechanical connections, further enhancing the binding force between the oil-containing lubricating particles and the fiber.

[0071] Sixth, on this basis, the present invention forms calcium fatty acid by reacting fatty acid salt in clarified lime water, and the calcium fatty acid is deposited on the surface of the inorganic nano-lubricating particles, which can improve its surface properties and enable it to disperse more uniformly and stably in the oil phase.

[0072] Seventh, by providing star nodes 102 on the crosslinked network 101, the present invention can, on the one hand, enhance the crosslinked network through the introduction of the star nodes 102, and on the other hand, the inorganic nanoparticles attached to the crosslinked network 101 can achieve a microstructure similar to a "ball bearing", which can move within a short distance but is not easily moved over a long distance due to the restraint of the chain segments. Thus, the star nodes 102 on the crosslinked network 101 can be fixed within a specific range by the crosslinked network 101, which can play an anti-friction and wear-reducing role while not easily agglomerating. At the same time, during the preparation process, the particle size and density of the star nodes 102 should be controlled to prevent the star nodes 102 on the crosslinked network 101 from being too large or too dense, forming excessive aggregates.

[0073] Eighth, in the present invention, the uniformity of the star nodes 102 and the binding stability between the inorganic nanoparticles and the network chains of the water-soluble polymer are also improved by reactive in-situ deposition, and finally, star nodes 102 that can move over a short distance but are restricted by the polymer chain segments in terms of the degree of freedom of movement over a long distance and are arranged in a certain manner are obtained. While playing an anti-wear and friction-reducing role, they can also stably adhere to the fibers and effectively prevent the occurrence of agglomeration.

[0074] In summary, the polyester spinning finish described in the present invention improves the anti-wear and friction-reducing performance, lubricating performance, stability, and anti-agglomeration ability of the finish by optimizing the addition method of the nanoparticles.

[0075] The following specifically illustrates the polyester spinning finish described in the present invention through specific examples: Example 1 Pretreatment of inorganic nano-lubricating particles: First, disperse the inorganic nano-lubricating particles into a soluble calcium salt solution, then add sodium oleate dropwise, react for 20 minutes at room temperature with stirring, and then separate and dry to obtain the pretreated inorganic nano-lubricating particles; among them, the inorganic nano-lubricating particles are silica, the soluble calcium salt is a calcium chloride solution, the addition amount of the sodium oleate is 20% of the weight of the inorganic nano-lubricating particles, the concentration of calcium ions in the soluble calcium salt solution is 0.5 mol / L, and the content of the inorganic nano-lubricating particles in the soluble calcium salt solution is 10 wt%.

[0076] Example 2 Pretreatment of inorganic nano-lubricating particles: First, 3 parts by weight of dopamine powder and 20 parts by weight of deionized water are mixed, stirred to fully dissolve the dopamine powder, 10 parts by weight of inorganic nano-lubricating silica particles are added, and stirred to evenly disperse the inorganic nano-lubricating particles, and then 120 parts by weight of an alkaline solution with a concentration of 8wt% is added, and the mixture is reacted for 15 hours under stirring, centrifuged, washed with water, filtered, and dried to obtain inorganic nano-lubricating particles with polydopamine surface modification; Then, the inorganic nano-lubricating particles modified with polydopamine surface are dispersed in a calcium chloride solution, and then sodium oleate is added dropwise. After reacting for 20 minutes at room temperature and under stirring, the particles are separated and dried to obtain the pretreated inorganic nano-lubricating particles. The amount of sodium oleate added is 20% of the weight of the inorganic nano-lubricating particles, the concentration of calcium ions in the soluble calcium salt solution is 0.5 mol / L, and the content of the inorganic nano-lubricating particles in the soluble calcium salt solution is 10 wt%.

[0077] Example 3 Preparation of mixed system b: A water-soluble polymer, deionized water and an emulsifier are mixed according to a weight ratio and stirred thoroughly to obtain a mixed system b, wherein the water-soluble polymer is polyvinyl alcohol, the emulsifier is Tween 80, and the weight addition ratio of the water-soluble polymer, the emulsifier and deionized water is 2:10:200.

[0078] Example 4 Preparation of mixed system b: The water-soluble polymer polyvinyl alcohol is dissolved in deionized water according to a weight ratio to prepare an aqueous solution, and then the inorganic nanoparticles titanium dioxide and the emulsifier Tween 80 are dispersed in the aqueous solution of the water-soluble polymer, and stirred until uniformly dispersed to obtain the mixed system b, wherein the weight addition ratio of the water-soluble polymer, the emulsifier and the deionized water is 2:10:200, and the addition amount of the inorganic nanoparticles is twice the addition amount of the water-soluble polymer.

[0079] Example 5 Preparation of mixed system b: According to the weight ratio, the water-soluble polymer polyvinyl alcohol is first dissolved in 30wt% of the formula amount of deionized water to prepare an aqueous solution, and then the inorganic nanoparticles titanium dioxide and the emulsifier Tween 80 are dispersed in the aqueous solution of the water-soluble polymer, stirred until uniformly dispersed, and the remaining deionized water is added and stirred uniformly to obtain the mixed system b, wherein the weight addition ratio of the water-soluble polymer, the emulsifier and the deionized water is 2:10:200, and the addition amount of the inorganic nanoparticles is twice the addition amount of the water-soluble polymer.

[0080] Example 6 Preparation of mixed system b: Dissolve 8 parts by weight of sodium silicate in 30 parts by weight of deionized water, stir to dissolve it fully to obtain an aqueous sodium silicate solution; take 2 parts by weight of water-soluble polymer polyvinyl alcohol and dissolve it in the remaining deionized water, then slowly add the aqueous sodium silicate solution dropwise to the aqueous solution of the water-soluble polymer. After the dropping is completed, use an acid solution to adjust the pH of the mixture to 8, and react for 3 h under low-speed stirring, then add the formulated amount of emulsifier Tween 80 to obtain the mixed system b, wherein the weight addition ratio of the water-soluble polymer, emulsifier and deionized water is 2:10:200.

[0081] Examples 7 - 11 Preparation of oil-containing lubricating particles: (1) First, disperse the pretreated inorganic nano-lubricating particles in Examples 1 and 2 above into an oily dispersion medium respectively. After uniform dispersion, obtain core suspension A and core suspension B with the content of inorganic nano-lubricating particles being 5 wt%; wherein, the oily dispersion medium is a mixture of synthetic fatty acid ester and vegetable oil in a weight ratio of 6:2. (2) Then disperse the prepared core suspension A or B and Pluronic-NHS in an organic solvent to obtain a mixed system a. The Pluronic used for preparing Pluronic-NHS is specifically L121, and the organic solvent is dichloromethane. Then slowly add the mixed system a to the mixed system b prepared in Examples 3 - 6. After the addition is completed, emulsify under ultrasound at 10 °C for 15 min, then distill off the organic solvent to obtain a dispersion of oil-containing lubricating particles, and then lyophilize the dispersion of oil-containing lubricating particles to obtain oil-containing lubricating particles.

[0082] Wherein: In the mixed system a, the mass ratio of the core suspension, Pluronic-NHS and organic solvent is 10:2:200, and the weight ratio of Pluronic-NHS to the water-soluble polymer in the mixed system b is 1.2:1; The oil-containing lubricating particles in Example 7 are prepared by using the pretreated inorganic nano-lubricating particles in Example 1 above and the mixed system b prepared in Example 3. The oil-containing lubricating particles in Example 8 are prepared by using the pretreated inorganic nano-lubricating particles in Example 2 above and the mixed system b prepared in Example 3. The oil-containing lubricating particles in Example 9 are prepared by using the pretreated inorganic nano-lubricating particles in Example 2 above and the mixed system b prepared in Example 4. The oil-containing lubricating particles in Example 10 are prepared by using the pretreated inorganic nano-lubricating particles in Example 2 above and the mixed system b prepared in Example 5. The oil-containing lubricating particles in Example 11 are prepared by using the inorganic nano-lubricating particles pretreated in Example 2 and the mixed system b prepared in Example 6.

[0083] Example 12 Preparation of oil-lubricated particles: (1) First, the inorganic nano-lubricating particles pretreated in Example 2 are dispersed in an oily dispersion medium, and after being uniformly dispersed, a core suspension B containing 5 wt% of inorganic nano-lubricating particles is obtained; wherein the oily dispersion medium is a mixture of synthetic fatty acid ester and vegetable oil in a weight ratio of 6:2; Then the prepared core suspension B and Pluronic-NHS are dispersed in an organic solvent to obtain a mixed system a, in which the Pluronic used to prepare Pluronic-NHS is specifically L121, the organic solvent is dichloromethane, the mass ratio of the core suspension, Pluronic-NHS and the organic solvent is 10:2:200, and the weight ratio of Pluronic-NHS and the water-soluble polymer in the mixed system b is 1.2:1; then the mixed system a is slowly added to the mixed system b prepared in Example 6, and after the addition is completed, the dispersion is emulsified under ultrasound at 10°C for 15 minutes, and the organic solvent is distilled off to obtain a dispersion of oil-containing lubricating particles. After heating it to 40°C and keeping it warm for 5 minutes, a surfactant SDS is added, and the amount of the surfactant SDS added is 0.02% of the weight of the water-soluble polymer in the dispersion of the oil-containing lubricating particles, and after stirring at the current temperature for 10 minutes, freeze-dried to obtain oil-containing lubricating particles.

[0084] Embodiments 13 to 20 Preparation of polyester oil for high-speed spinning: The raw materials for preparing the polyester oil for high-speed spinning were weighed according to the weight ratio of the raw materials shown in Table 1 below, and the smoothing agent, emulsifier, antistatic agent and sizing agent were mixed and stirred evenly to obtain an oil phase, and then the oil-containing lubricating particles prepared in Examples 7 to 12 were taken according to the weight ratio and dispersed into the pre-prepared oil phase, and stirred at 10° C. for 25 minutes to obtain a polyester oil for high-speed spinning.

[0085] Table 1 Oil raw material ratio Among them, the smoothing agent is a mixture of mineral oil, synthetic fatty acid ester, and polyether mixed in a mass ratio of 2:5:3; the emulsifier is a mixture of sorbitan fatty acid ester, castor oil polyoxyethylene ether, and N-methylamide carboxylate mixed in a mass ratio of 1:0.5:0.5; the antistatic agent is a mixture of quaternary ammonium salt, alkyl phosphate salt, and alkyl sulfonate mixed in a ratio of 0.5:1:0.5; the bundling agent is coconut diethanolamide.

[0086] Comparative Example 1 Preparation of polyester spinning finish for high-speed spinning: The difference between it and Example 13 above is only that no oil-containing lubricating particles are added.

[0087] Comparative Example 2 Preparation of polyester spinning finish for high-speed spinning: The difference between it and Example 13 above is only that 5 parts by weight of inorganic nano-lubricating particles are directly added to the spinning finish instead of the oil-containing lubricating particles.

[0088] Testing of the properties of the spinning finish: (I) The lubrication and friction reduction properties of the polyester spinning finishes for high-speed spinning prepared in Examples 13 to 20 and Comparative Examples 1 to 2 above were detected, and the results shown in Table 2 below were obtained. Among them, the oil film strength was detected using a four-ball friction tester according to GB / T 3142-82; the dynamic friction coefficient μ d is the dynamic friction coefficient between polyester fiber and metal; Table 2 Detection results of the lubrication and friction reduction properties of the spinning finish (I) The following is a spinning test on the lubrication and friction reduction properties of the polyester spinning finishes for high-speed spinning prepared in Examples 13 to 20 and Comparative Examples 1 to 2 above. The spinning specification is 100 dtex / 72 f, and the spinning speed is 3800 m / min. The results shown in Table 3 below were obtained through the spinning performance test: Table 3 Test results of the spinning performance of the spinning finish The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and the features in the embodiments in the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Those of ordinary skill in the art, under the inspiration of the present application, without departing from the purpose of the present application and the scope protected by the claims, can also make many forms, all of which fall within the protection scope of the present application.

Claims

1. A polyester spinning finish for high-speed spinning, characterized in that, By weight, it includes: 40-60 parts of a smoothing agent, 10-20 parts of an emulsifier, 5-20 parts of an antistatic agent, 5-10 parts of a bundling agent, and 5-15 parts of oil-containing lubricating particles. The oil-containing lubricating particles include a core suspension and a shell layer coated on the outside of the core suspension. The core suspension includes an oily dispersion medium and inorganic nano-lubricating particles dispersed in the oily dispersion medium, and the shell layer is a temperature-sensitive reversible cross-linked network structure.

2. The polyester spinning finish for high-speed spinning according to claim 1, characterized in that, The shell layer is an amphiphilic temperature-sensitive reversible cross-linked network structure.

3. The polyester finish for high-speed spinning according to claim 1 or 2, characterized in that The shell layer includes: a cross-linked network; The cross-linked network is a temperature-sensitive reversible cross-linked network structure formed by the reaction and cross-linking of Pluronic-NHS with a water-soluble high molecular polymer containing hydroxyl groups.

4. The polyester finish for high-speed spinning according to claim 3, characterized in that, Star nodes are attached to the cross-linked network in the shell layer, and the star nodes are formed by attaching inorganic nano-particles to the cross-linked network.

5. The polyester oil agent for high-speed spinning according to claim 4, wherein The star nodes are inorganic nano-particles attached to the Pluronic-NHS and / or the water-soluble high molecular polymer chain segments containing hydroxyl groups.

6. The polyester spinning finish for high-speed spinning according to claim 5, characterized in that, The star nodes are inorganic nano-particles attached to the water-soluble high molecular polymer chain segments containing hydroxyl groups.

7. The polyester spinning finish for high-speed spinning according to claim 1, characterized in that, The smoothing agent is a mixture of mineral oil, synthetic fatty acid ester, and polyether. Among them, the mass ratio of mineral oil, synthetic fatty acid ester, and polyether is (1-3):(3-5):(2-4).

8. The polyester spinning finish for high-speed spinning according to claim 1, wherein The preparation process of the polyester oil agent for high-speed spinning is as follows: S1, Pretreatment of inorganic nano-lubricating particles: First, disperse the inorganic nano-lubricating particles into a soluble calcium salt solution, then dropwise add fatty acid salts, react at room temperature with stirring for 10-30 min, and then separate and dry to obtain the pretreated inorganic nano-lubricating particles; S2, Preparation of the core suspension: Disperse the inorganic nano-lubricating particles pretreated in step S1 into an oily dispersion medium, and after uniform dispersion, obtain the core suspension; S3, Preparation of oil-containing lubricating particles: Disperse the core suspension prepared in step S2 and Pluronic-NHS in an organic solvent to obtain a mixed system a, and mix the water-soluble high molecular polymer, deionized water, and emulsifier, and stir well to obtain a mixed system b. Then slowly add the mixed system a to the mixed system b. After the addition is completed, emulsify under ultrasound at 5-18 °C for 10-20 min, then distill off the organic solvent to obtain a dispersion of oil-containing lubricating particles, and then lyophilize the dispersion of oil-containing lubricating particles to obtain oil-containing lubricating particles; S4, Preparation of the oil phase: Mix appropriate amounts of a smoothing agent, an emulsifier, an antistatic agent, and a bundling agent according to the weight ratio of the smoothing agent, emulsifier, antistatic agent, and bundling agent in the polyester oil agent, and stir well to obtain the oil phase; S5, Preparation of the polyester oil agent for high-speed spinning: Disperse the oil-containing lubricating particles prepared in step S3 into the oil phase prepared in step S4. First, stir at 5-15 °C for 20-30 min, then heat up to 30-40 °C and stir for 5-10 min to obtain the polyester oil agent for high-speed spinning.

9. The polyester spinning finish for high-speed spinning according to claim 8, characterized in that, The mixed system b in the step S3 further includes inorganic nano-particles, and the addition amount of the inorganic nano-particles is 0.5 to 3 times that of the water-soluble polymer. In the step S3, the preparation process of the mixed system b is as follows: Dissolve the water-soluble polymer in deionized water according to the weight ratio to prepare an aqueous solution, then disperse the inorganic nano-particles and the emulsifier into the aqueous solution of the water-soluble polymer, and stir until evenly dispersed to obtain the mixed system b; Or, First, dissolve the water-soluble polymer in 30 to 50 wt% of the deionized water of the formula amount to prepare an aqueous solution, then disperse the inorganic nano-particles and the emulsifier into the aqueous solution of the water-soluble polymer, stir until evenly dispersed, add the remaining deionized water and stir evenly to obtain the mixed system b.

10. The polyester spinning finish for high-speed spinning according to claim 8, characterized in that, The preparation process of the mixed system b in the step S3 is as follows: Dissolve 2 to 10 parts by weight of sodium silicate in 10 to 40 parts by weight of deionized water, stir to dissolve it fully to obtain a sodium silicate aqueous solution; take 1 to 3 parts by weight of the water-soluble polymer and dissolve it in the remaining deionized water, then slowly drop the sodium silicate aqueous solution into the aqueous solution of the water-soluble polymer. After the dropping is completed, use an acid solution to adjust the pH of the mixed solution to 7 to 8, and react for 2 to 3 h under low-speed stirring, and then add the emulsifier of the formula amount to obtain the mixed system b.

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