A solution-applied oiling agent for para-aramid spinning

Abstract

This invention relates to a solution-applied para-aramid spinning oil, wherein the oil comprises, by weight percentage: 35-70% smoothing agent, 15-40% emulsifier, 1-10% antistatic agent, and 1-5% antioxidant; the smoothing agent is at least one selected from high-temperature resistant higher fatty acid esters, fatty acid polyoxyethylene esters, and polyol polyoxyethylene esters, wherein the flash point temperature of the high-temperature resistant higher fatty acid ester is not lower than 200°C; the antistatic agent is C 12 ~C 20 Alkyl polyoxyethylene ether phosphate potassium salt or C 12 ~C 20 At least one of alkyl sulfonates; the antioxidant is a hindered phenolic solid antioxidant or a phosphite liquid antioxidant. The finished oil has good wettability, smoothness, penetration, antistatic properties and unwinding performance, is easy to remove with water, and has excellent high temperature resistance. It has excellent wettability and fast spreading speed on the surface of para-aramid fibers, with small fiber tension fluctuations and uniform fiber stretching.

Description

Technical Field

[0001] This invention belongs to the technical field of para-aramid spinning oil agents, specifically relating to a solution-applied para-aramid spinning oil agent. Background Technology

[0002] Para-aramid, also known as poly(p-phenylene terephthalamide) fiber or aramid 1414, is a high-strength, high-modulus synthetic fiber material. It is generally produced by dry and wet spinning of polymers obtained through the condensation polymerization of p-phenylenediamine and terephthaloyl chloride. It possesses characteristics such as high strength, high modulus, high temperature resistance, flame retardancy, chemical corrosion resistance, low density, and light weight, and is widely used in industries such as safety protection, rubber reinforcement, friction materials, and optical fibers. The development and application of para-aramid is one of the key development and supported industrial directions in China's high-performance fiber and composite materials industry.

[0003] Due to the highly regular arrangement of macromolecular chains, large degree of crystal orientation, large steric hindrance of benzene rings, and "core-sheath structure," para-aramid fibers exhibit high rigidity and modulus. Consequently, they have a smooth surface, few polar groups, low chemical activity, strong hydrophobicity, poor cohesion, and are prone to static electricity. This leads to spinnability problems during processing, such as uneven oiling, fuzzy ends, and poor forming. Therefore, suitable oiling agents must be used to oil the fibers during production. High-performance oiling agents have lower surface tension and faster wetting speed, allowing for rapid and uniform spreading onto the fiber surface to improve smoothness, cohesion, antistatic properties, and oiling uniformity.

[0004] Due to historical and technological reasons, traditional synthetic fiber spinning oils are generally emulsion-based. During spinning production, water or other solvents are needed to dilute the spinning oil to a lower concentration emulsion before it can be used for fiber spinning. However, due to the evaporation of water or solvents, the oil film (oil-water adsorption layer) adhering to the fiber surface thins, shrinks, or breaks during high-speed drawing, winding, friction, and heat setting due to the reduction of volatile components such as water. This results in insufficient fiber smoothness and cohesion, large fluctuations in fiber tension, and poor spinning stability, easily leading to problems such as fuzzing, breakage, tangling, and high static electricity. This causes a decline in fiber mechanical properties, poor yarn cake winding, and difficulty in unwinding. Furthermore, the use of water or solvents to dilute and prepare the oil emulsion increases water consumption and raises environmental and health concerns, resulting in higher production costs. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the technical problem this invention aims to solve is to provide a dope-based oiling agent for para-aramid spinning. The finished oiling agent exhibits good wetting, smoothing, penetration, antistatic properties, and unwinding performance; it is easily washable and removes easily; and it possesses excellent high-temperature resistance. Because it is dope-based, the oiling agent has low surface energy, resulting in excellent wetting properties and a fast spreading speed on the surface of para-aramid fibers. It provides uniform oiling, minimal fiber tension fluctuations, uniform fiber stretching, fewer fuzzy ends, good winding formation, high bobbin fullness, and good spinnability.

[0006] The technical solution adopted by the present invention to solve the aforementioned technical problem is as follows:

[0007] A solution-applied para-aramid spinning oil, wherein the oil has the following mass percentage composition:

[0008]

[0009] The sum of all components is 100%;

[0010] The smoothing agent is at least one of high-temperature resistant high-grade fatty acid ester, fatty acid polyoxyethylene ester, and polyol polyoxyethylene ester, and the flash point temperature of the high-temperature resistant high-grade alcohol fatty acid ester is not lower than 200°C.

[0011] The emulsifier is at least one of fatty alcohol polyoxyethylene ether, polyoxyethylene polyoxypropylene copolyether, polyol polyoxyethylene ether, ethoxylated derivative of sorbitan fatty acid ester, oleic acid polyoxyethylene ether, or castor oil polyoxyethylene ether.

[0012] The antistatic agent is C. 12 ~C 20 Alkyl polyoxyethylene ether phosphate potassium salt or C 12 ~C 20 At least one of alkyl sulfonates;

[0013] The antioxidant is a hindered phenolic solid antioxidant or a phosphite liquid antioxidant.

[0014] Further, the smoothing agent comprises 55-70% by mass; the smoothing agent is at least one of isomeric tridecyl stearate, pentaerythritol oleate, lauryl oleate, and trimethylolpropane oleate, and further comprises at least one of fatty acid polyoxyethylene ester or polyol polyoxyethylene ester; the antistatic agent further comprises C 12 ~C 20 Alkyl alcohol phosphate potassium salt, C 12 ~C 20 The amount of alkyl alcohol phosphate potassium salt added shall not exceed 2% of the total mass of the oil.

[0015] Furthermore, the antioxidant has the effect of reducing, delaying and inhibiting the high-temperature oxidative decomposition of organic matter, and the antioxidant is at least one of antioxidant 1076, antioxidant 1010 and antioxidant 264;

[0016] The antistatic agent is C. 12 ~C 20 When using alkyl sulfonates, the preferred antistatic agent is C. 12 ~C 20 Secondary alkyl sulfonates.

[0017] Furthermore, the oiling agent is a liquid oiling agent with low surface energy, which has excellent wetting properties and fast spreading speed on the fiber surface. It has uniform oiling, small tension fluctuation, uniform fiber stretching, fewer filament breaks, good winding and forming, high full bobbin rate, good spinnability, and small fluctuation in fiber mechanical properties.

[0018] The basic technical specifications of the oil are as follows:

[0019] Appearance: Oily liquid, homogeneous, stable and does not separate into layers;

[0020] Solid content (wt%): ≥98%;

[0021] pH value (1% aqueous emulsion): 7±1;

[0022] Viscosity (30℃, mm) 2 / s): Oil concentrate 70±20;

[0023] Surface tension (25℃, mN / m): 30±2 for the original solution.

[0024] Further, the smoothing agent is a composite of 25% by mass of isotridecyl stearate, 25% by mass of oleic acid polyoxyethylene ester, and 5% by mass of dehydrated sorbitan fatty acid ester; the emulsifier is a composite of 10% by mass of lauryl alcohol polyoxyethylene polyoxypropylene ether, 15% by mass of isotridecyl polyoxyethylene ether, and 8% by mass of castor oil polyoxyethylene ether; the antistatic agent is a composite of 3% by mass of lauryl alcohol polyoxyethylene phosphate potassium salt and 5% by mass of C 12 ~C 16 It is composed of sodium secondary alkyl sulfonate;

[0025] Alternatively, the smoothing agent may be a composite of 25% by mass of isotridecyl stearate and 30% by mass of lauryl oleate; the emulsifier may be 10% by mass of lauryl polyoxyethylene ether and 10% by mass of C 12-14 It is composed of alcohol polyoxyethylene polyoxypropylene ether, 5% by mass of dehydrated sorbitol oleate, and 5% by mass of polyoxyethylene dehydrated sorbitol oleate;

[0026] Alternatively, the smoothing agent may be a composite of 20% by mass of oleic acid polyoxyethylene ester and 35% by mass of trimethylolpropane oleate; the emulsifier may be a composite of 15% by mass of lauryl alcohol polyoxyethylene polyoxypropylene ether and 20% dehydrated sorbitan stearate; and the antistatic agent may be 1% by mass of C 12-14 Potassium phosphate of alcohol, 3% C 12-16 It is composed of sodium secondary alkyl sulfonate;

[0027] Alternatively, the smoothing agent may be a composite of 45% by mass of oleic acid polyoxyethylene and 15% by mass of pentaerythritol oleate; the emulsifier may be 10% by mass of isomeric decaol polyoxyethylene polyoxypropylene ether, 10% by mass of dehydrated sorbitan palmitate, and 10% by mass of C 12-14 It is composed of alcohol-polyoxyethylene polyoxypropylene ether; the antistatic agent is potassium salt of isomeric tridecyl alcohol polyoxyethylene ether phosphate.

[0028] Alternatively, the smoothing agent may be a composite of 30% by mass of polyethylene glycol oleate and 30% by mass of isotridecyl stearate, and the emulsifier may be 15% by mass of C 12-14 It is composed of alcohol polyoxyethylene ether, 5% by mass of dehydrated sorbitan oleate, and 10% by mass of isomeric tridecyl alcohol polyoxyethylene ether; the antistatic agent is 5% by mass of sodium secondary alkyl sulfonate and 1% by mass of C 12～14 It is composed of potassium salt of alcohol phosphate.

[0029] This invention also protects a method for preparing the aforementioned solution-applied para-aramid spinning oil, the specific steps of which are:

[0030] Accurately measure the antistatic agent, smoothing agent, emulsifier, and antioxidant according to the group ratio; first add the smoothing agent and antioxidant to the reaction vessel, heat to 70-90℃, and stir for 1-2 hours; control the temperature at 50-70℃, then add the emulsifier and antistatic agent, stir evenly, and stir for 1-2 hours; cool to room temperature, filter, and discharge.

[0031] After oiling, the mechanical properties of para-aramid fibers, such as breaking strength and elongation at break, remain stable with minimal fluctuations.

[0032] Spinning production can be carried out using either solution oiling or emulsion oiling, with solution oiling being the preferred method.

[0033] Compared with the prior art, the beneficial effects of the present invention are:

[0034] This invention relates to a novel crude oil-based spinning oiling agent, suitable for the production of para-aramid filaments. The oiling agent of this invention is applied as a raw solution, requiring no dilution with solvents such as water; it can be used directly as a raw solution. This solves problems such as uneven spreading of the oil on the fiber surface, numerous filament breaks, poor smoothness, tight winding of the yarn cake, poor unwinding of the yarn bundle, and poor spinnability. Furthermore, since it does not use water or methanol as diluents, it avoids fluctuations in fiber mechanical properties and strength loss caused by water evaporation. In addition, it saves water, reduces consumption, and avoids environmental pollution problems such as the recycling and treatment of oiling agent wastewater. The oiling agent of this invention has low surface energy, uniform oiling, excellent high-temperature resistance, is water-saving and environmentally friendly, and the oiled fibers have good physical and mechanical properties. It is simple and convenient to use directly and is suitable for the industrial application of high-strength, high-modulus para-aramid fibers.

[0035] The monomers in the oiling system of this invention are polyoxyethylene, polyoxypropylene ethers, fatty acid esters, polyoxyethylene ether phosphate salts, and alkyl sulfonates. From their molecular structures, they are all biodegradable organic compounds. The prepared oiling agent has good biocompatibility, low toxicity, and good biodegradability. It can be used for spinning production by oiling with either the original solution or the emulsion, with oiling with the original solution being preferred.

[0036] The oiling agent of this invention has a high effective component content, a solid content of over 98%, and low surface tension. It exhibits good wetting and spreading properties on the surface of para-aramid fibers, making it suitable for oiling production of filaments.

[0037] The oiling agent of this invention contains a high content of high-temperature resistant lubricant. The selection of the lubricant must consider not only its high-temperature resistance but also the overall cohesive and emulsifying effects of the oiling agent. Polyoxyethylene and polyoxypropylene nonionic surfactants are added to play a role in emulsification and friction adjustment. Special types of antistatic agents and antioxidants are added to further improve antistatic and high-temperature resistance. The synergistic effect between the components can achieve oiling of crude oil. The aramid fibers after oiling have good spinnability, and the mechanical properties of the fibers, such as breaking strength and elongation at break, fluctuate little. Detailed Implementation

[0038] Specific embodiments of the present invention are given below. These specific embodiments are only used to further illustrate the present invention and do not limit the scope of protection of the claims of this application.

[0039] Example 1

[0040] The weight percentage of the oil is:

[0041]

[0042] Preparation method of oil:

[0043] First, add 55% by mass of a three-component composite smoothing agent (25% by mass of isomeric tridecyl stearate, 25% oleic acid polyoxyethylene ester, and 5% dehydrated sorbitan fatty acid ester) to the reactor; then add 1% by mass of antioxidant 1076, mix and stir, heat to 90℃, and stir for 1 hour; cool to 55℃ and maintain the temperature; then add 33% by mass of a three-component composite emulsifier; finally, add 8% by mass of a two-component antistatic agent (3% by mass of lauryl alcohol polyoxyethylene phosphate potassium salt, and 5% by mass of C... 12 ~C 16 Sodium secondary alkyl sulfonate), stir for 2 hours; cool to room temperature and discharge to obtain the final product.

[0044] The resulting oil is a yellow, oily liquid with a pH of 7.5, a solid content of 98.8%, and a crude oil viscosity of 59.2 mm. 2 / s, 10% emulsion viscosity 2.1mm 2 / s; the surface tension of the oil concentrate is 28.4 mN / m, and the surface tension of the 10% emulsion is 30.7 mN / m.

[0045] When using this oil to produce para-aramid fibers, the spinnability is good, the tension fluctuation during spinning and drawing is small, the winding and forming are good, and the weaving process is smooth with no static electricity. The performance indicators of para-aramid fibers after oiling are: breaking strength 20.15 cN / dtex, breaking elongation 3.64%; oiling rate 2.56%.

[0046] Example 2

[0047] The weight percentage of the oil is:

[0048]

[0049] Preparation method of oil:

[0050] First, add 55% by mass of a two-component smoothing agent (25% by mass of isotridecyl stearate and 30% by mass of lauryl oleate) to the reactor; then add 3% by mass of antioxidant 1010, heat to 88°C, and stir for 1 hour; cool to 60°C and maintain the temperature; then add 30% by mass of a four-component emulsifier (10% by mass of lauryl polyoxyethylene ether and 10% by mass of C... 12-14 The product consists of: 5% by mass of polyoxyethylene polyoxypropylene ether, 5% by mass of sorbitan oleate, and 5% by mass of polyoxyethylene sorbitan oleate; finally, 2% by mass of antistatic agent lauryl alcohol polyoxyethylene ether phosphate potassium salt is added, and the mixture is stirred for 1.5 hours; after cooling to room temperature, the product is obtained by discharging.

[0051] The resulting oil is a yellow, oily liquid with a pH of 7.2, a solid content of 98.2%, and a crude oil viscosity of 56.7 mm. 2 / s, 10% emulsion viscosity 1.72mm 2 / s; the surface tension of the oil concentrate is 31.8 mN / m, and the surface tension of the 10% emulsion is 33.4 mN / m.

[0052] When using this oil to produce para-aramid fibers, the spinnability is good, the tension fluctuation during spinning and drawing is small, the winding and forming are good, and the weaving process is smooth with no static electricity. The performance indicators of para-aramid fibers after oiling are: breaking strength 21.85 cN / dtex, breaking elongation 4.37%; oiling rate 1.79%.

[0053] Example 3

[0054] The weight percentage of the oil is:

[0055]

[0056] Preparation method of oil:

[0057] First, add 55% by mass of a two-component smoothing agent (20% by mass of oleic acid polyoxyethylene ester and 35% by mass of trimethylolpropane oleate) to the reactor; then add 5% by mass of antioxidant 1010, heat to 85°C, and stir for 0.5 hours; cool to 65°C and maintain the temperature; then add 35% by mass of a two-component emulsifier (15% by mass of lauryl alcohol polyoxyethylene polyoxypropylene ether and 20% dehydrated sorbitan stearate); finally, add 4% by mass of a two-component antistatic agent (1% by mass of C... 12-14 Potassium phosphate of alcohol, 3% C 12-16 Sodium secondary alkyl sulfonate was stirred for 2 hours; the mixture was then cooled to room temperature, and the target product was obtained by discharging.

[0058] The resulting oil is a yellow, oily liquid with a pH of 7.5, a solid content of 98.6%, a crude oil viscosity of 67.5 mm² / s, and a 10% emulsion viscosity of 2.03 mm² / s. 2 / s; the surface tension of the oil concentrate is 30.2 mN / m, and the surface tension of the 10% emulsion is 31.8 mN / m.

[0059] When using this oil to produce para-aramid fibers, the spinnability is good, the tension fluctuation during spinning and drawing is small, the winding and forming are good, and the weaving process is smooth with no static electricity. The performance indicators of para-aramid fibers after oiling are: breaking strength 20.74 cN / dtex, breaking elongation 3.87%; oiling rate 2.26%.

[0060] Example 4

[0061] The weight percentage of the oil is:

[0062]

[0063] Preparation method of oil:

[0064] First, add 60% by mass of a two-component smoothing agent (45% by mass of oleic acid polyoxyethylene and 15% by mass of pentaerythritol oleate) to the reactor; then add 5% by mass of antioxidant 264, heat to 85°C, and stir for 1 hour; cool to 65°C and maintain the temperature; then add 30% by mass of a three-component emulsifier (10% by mass of isomeric decaol polyoxyethylene polyoxypropylene ether, 10% by mass of dehydrated sorbitan palmitate, and 10% by mass of C... 12-14 Add 5% by mass of the antistatic agent isomeric tridecyl alcohol polyoxyethylene polyoxypropylene ether, and stir for 1 hour; cool to room temperature and discharge to obtain the target formulation oil.

[0065] The resulting oil is a yellow, oily liquid with a pH of 7.8, a solid content of 98.4%, and a crude oil viscosity of 57.5 mm. 2 / s, 10% emulsion viscosity 1.84mm 2 / s; the surface tension of the oil concentrate is 28.7 mN / m, and the surface tension of the 10% emulsion is 30.3 mN / m.

[0066] When using this oil to produce para-aramid fibers, the spinnability is good, the tension fluctuation during spinning and drawing is small, the winding is good, and the unwinding during weaving is smooth and there is no static electricity. The performance indicators of para-aramid fibers after oiling are: breaking strength 20.36 cN / dtex, breaking elongation 3.79%; oiling rate 2.33%.

[0067] Example 5

[0068] The weight percentage of the oil is:

[0069]

[0070] Preparation method of oil:

[0071] First, add 60% by mass of the two-component smoothing agent (30% by mass of polyethylene glycol oleate and 30% by mass of synthetic fatty acid ester (isotridecyl stearate)) to the reactor; then add 4% by mass of antioxidant 1076, heat to 85°C, and stir for 1 hour.

[0072] Cool to 65°C and maintain the temperature; then add 30% by mass of a three-component emulsifier (15% by mass of C). 12-14 The mixture consists of alcohol polyoxyethylene ether, 5% by mass of dehydrated sorbitan oleate, and 10% by mass of isomeric tridecyl alcohol polyoxyethylene ether. Finally, 6% by mass of a two-component antistatic agent (5% by mass of sodium secondary alkyl sulfonate and 1% by mass of C) is added. 12～14Potassium phosphate of alcohol, stir for 1 hour; cool to room temperature, and discharge to obtain the target product.

[0073] The resulting oil is a yellow, oily liquid with a pH of 8.0, a solid content of 98.0%, and a crude oil viscosity of 63.2 mm. 2 / s, 10% emulsion viscosity 1.93mm 2 / s; the surface tension of the oil concentrate is 29.1 mN / m, and the surface tension of the 10% emulsion is 31.7 mN / m.

[0074] When using this oil to produce para-aramid fibers, the spinnability is good, the tension fluctuation during spinning and drawing is small, the winding and forming are good, the unwinding is smooth, and there is no static electricity. The performance indicators of para-aramid fibers after oiling are: breaking strength 20.76 cN / dtex, breaking elongation 3.82%; oiling rate 2.07%.

[0075] Any aspects not covered in this invention are applicable to existing technologies.

Claims

1. A dope oiling type para-aramid fiber spinning oil agent, characterized by, The technical index of the oil agent is: Appearance: oily liquid, uniform and stable without stratification; Solid content ≥98%wt; The pH value of 1% water emulsion is 7±1; 30°C, 70 ± 20 mm 2 / s; The surface tension of the original liquid at 25℃ is 30±2mN / m; The mass percentage composition of the oil agent is: The smoothing agent is at least one of high-temperature-resistant high-grade fatty acid ester, fatty acid polyoxyethylene ester and polyhydric alcohol polyoxyethylene ester, and the flash point temperature of the high-temperature-resistant high-grade alcohol fatty acid ester is not less than 200℃; The emulsifier is at least one of polyoxyethylene polyoxypropylene copolyether, polyhydric alcohol polyoxyethylene ether, ethoxylated derivative of sorbitan fatty acid ester, oleic acid polyoxyethylene ether or castor oil polyoxyethylene ether; or the emulsifier is 10% by mass of lauryl alcohol polyoxyethylene ether, 10% by mass of C 12-14 alcohol polyoxyethylene polyoxypropylene ether, 5% by mass of sorbitan oleate, 5% by mass of polyoxyethylene sorbitan oleate complex; or the emulsifier is 15% by mass of C 12-14 alcohol polyoxyethylene ether, 5% by mass of sorbitan oleate, 10% by mass of isomeric tridecanol polyoxyethylene ether are compounded; The antistatic agent is C 12 ~ C 20 at least one of alkyl polyoxyethylene ether phosphate potassium salt or C 12 ~ C 20 alkyl sulfonate salt; The antioxidant is hindered phenol solid antioxidant or phosphite liquid antioxidant; The oil agent is original liquid oiling, the surface energy of the oil agent is low, the fiber surface has excellent wetting performance and faster spreading speed, the oiling is uniform, the tension fluctuation is small, the fiber drafting is uniform, the broken ends are less, the winding is good, the full can rate is high, the spinnability is good, and the fiber mechanical property fluctuation is small.

2. The dope oiling type para-aramid fiber spinning oil agent according to claim 1, characterized by, The mass percentage of the smoothing agent is 55-70%; the smoothing agent is at least one of isomeric tridecanol stearate, pentaerythritol oleate, trimethylolpropane oleate, and further includes at least one of fatty acid polyoxyethylene ester or polyhydric alcohol polyoxyethylene ester; the antistatic agent further includes C 12 ~C 20 alkyl alcohol phosphate potassium salt, C 12 ~C 20 The addition amount of the alkyl alcohol phosphate potassium salt is not more than 2% of the total mass of the oil.

3. The dope oiling type para-aramid spinning oil agent according to claim 1, characterized by, The antioxidant has the effect of reducing, delaying and inhibiting high-temperature oxidative decomposition of the organic substance, and the antioxidant is at least one of antioxidant 1076, antioxidant 1010, and antioxidant 264; the antistatic agent is C 12 ~C 20 Secondary alkyl sulfonate.

4. The dope oiling type para-aramid fiber spinning oil agent according to claim 1, characterized by, The smoothing agent is a composite of 25% by mass of isotridecyl stearate, 25% by mass of oleic acid polyoxyethylene ester, and 5% by mass of dehydrated sorbitan fatty acid ester; the emulsifier is a composite of 10% by mass of lauryl alcohol polyoxyethylene polyoxypropylene ether, 15% by mass of isotridecyl polyoxyethylene ether, and 8% by mass of castor oil polyoxyethylene ether; the antistatic agent is a composite of 3% by mass of lauryl alcohol polyoxyethylene phosphate potassium salt and 5% by mass of C 12 ~C 16 It is composed of sodium secondary alkyl sulfonate; Or the smoothing agent is 25% mass fraction of isomeric tridecanol stearate, 30% mass fraction of lauryl alcohol oleate complex; the emulsifier is 10% mass fraction of lauryl alcohol polyoxyethylene ether, 10% mass fraction of C 12-14 alcohol polyoxyethylene polyoxypropylene ether, 5% mass fraction of sorbitan oleate, 5% mass fraction of polyoxyethylene sorbitan oleate complex; Or the smoothing agent is 20% by mass of oleic acid polyoxyethylene ester, 35% by mass of trimethylolpropane oleate complex; the emulsifier is 15% by mass of lauryl alcohol polyoxyethylene polyoxypropylene ether, 20% by mass of sorbitan stearate complex; the antistatic agent is 1% by mass of C 12-14 Alcohol phosphate potassium salt, 3% by mass of C 12-16 Sodium secondary alkyl sulfonate complex Or the smoothing agent is 45% mass fraction of oleic acid polyoxyethylene, 15% mass fraction of pentaerythritol oleate complex; the emulsifier is 10% mass fraction of isomeric decanol polyoxyethylene polyoxypropylene ether, 10% mass fraction of sorbitan palmitate, 10% mass fraction of C 12-14 alcohol polyoxyethylene polyoxypropylene ether complex; the antistatic agent is isomeric tridecanol polyoxyethylene ether phosphate potassium salt; Or the smoothing agent is 30% mass fraction of polyethylene glycol oleate, 30% mass fraction of isomeric tridecyl stearate, and the emulsifier is 15% mass fraction of C 12-14 alcohol polyoxyethylene ether, 5% mass fraction of sorbitan oleate, 10% mass fraction of isomeric tridecyl polyoxyethylene ether; the antistatic agent is 5% mass fraction of sodium secondary alkyl sulfonate, 1% mass fraction of C 12～14 alcohol phosphate potassium salt.

5. A method of preparing the dope oiling type p-aramid fiber spin finish according to claim 1, characterized in that, The specific steps of the preparation method are: The antistatic agent, the smoothing agent, the emulsifier and the antioxidant are accurately metered according to the component allocation ratio; first, the smoothing agent and the antioxidant are added to the reaction kettle, heated to 70-90℃, and stirred for 1-2h; the temperature is controlled at 50-70℃, then the emulsifier and the antistatic agent are added and stirred uniformly, and stirred for 1-2h; cooled to room temperature, filtered, and discharged.

6. Para-aramid filaments prepared using the dope oiling para-aramid spinning oil according to any one of claims 1 to 4, characterized in that, The mechanical index of the para-aramid fiber after oiling, including the breaking strength and the breaking elongation, is stable and has small fluctuation.

7. Para-aramid filaments prepared using the dope oiling para-aramid spinning oil according to any one of claims 1 to 4, characterized in that, The original liquid oiling is used for spinning production.

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