High-antistatic crude oil type polyester FDY spinning oil agent and preparation method thereof

Abstract

The invention relates to a high-antistatic crude oil type polyester FDY spinning oil agent and a preparation method thereof, a composition of sodium lauryl polyoxyethylene ether sulfate and potassium lauryl phosphate is used as a main antistatic agent, an antistatic smoothing agent with sulfonated chitosan and PEG800 as key components is adopted, the antistatic smoothing agent and the main antistatic agent have a synergistic effect, and the antistatic property of the spinning oil agent is improved. The overall antistatic property of the oiling agent is enhanced. The preparation method comprises the following steps: pre-balancing the materials at 40-50 DEG C before charging; then, sequentially adding an antistatic smoothing agent, a penetrating agent, a bundling agent, a main antistatic agent and an anti-coking agent, and adding materials while stirring; and finally, controlling the temperature of the reaction kettle to be 40-50 DEG C and the stirring speed to be 500-700r / min, and reacting for 0.5-1.5 hours. The crude oil type polyester FDY oiling agent is excellent in antistatic property, and polyester FDY spinning can be carried out in a crude oil direct oiling mode at the ultrahigh spinning speed of 4000 m / min.

Description

Technical Field

[0001] The invention relates to the technical field of spinning oils, in particular to a high antistatic crude oil type polyester FDY spinning oil and a preparation method thereof. Background Art

[0002] Polyester fully drawn yarn (FDY) is one of the main products of my country's polyester industry and is widely used in home textiles, clothing, engineering and other fields. The spinning speed of polyester FDY has generally exceeded 4000m / min. Due to the poor hygroscopicity of polyester, a large amount of static electricity is easily generated during spinning. It is necessary to pay attention to the treatment of static electricity when designing the spinning oil, and adjust the oil formula to reduce static electricity accumulation; at the same time, it should be noted that the spinning oil should comprehensively consider other properties such as smoothness and penetration, so that the fiber can pass through the spinning process smoothly.

[0003] The mainstream spinning oils in the polyester fiber industry are emulsion type and crude oil type. Among them, emulsion type oil contains more than 80% water. Since water itself can reduce static electricity, emulsion type oil usually has good antistatic properties. However, during the FDY spinning process, the water in the emulsion type oil is easily volatilized when heated at the hot roller, consuming a lot of heat, and the oily components in the emulsion system are released, producing a large amount of volatile organic compounds (VOCs). Crude oil type oil itself has very little water content and can better avoid the above problems. However, after the water content is greatly reduced, it is bound to affect the antistatic property of the oil. Static electricity causes the filaments to be loose and difficult to wind, which in turn produces hairy yarns and broken ends, affecting the spinnability of the fiber. For a long time, high antistatic crude oil type polyester FDY oil has been a long-standing technical problem that the chemical fiber oil industry has not been able to overcome.

[0004] The literature "Performance and Application of Crude Oil Polyester FDY Oil TK-1009TM" (Synthetic Fiber Industry, 2023, 46(03): 79-82.) reported crude oil polyester FDY oil TK-1009TM and F-217L, and analyzed the performance of the two oils. The oil was used to prepare fibers with specifications of 61dtex / 24f, 83dtex / 36f, and 135dtex / 36f. The specific resistivity obtained by the test was about 1.5×10 9 Ω.cm、3.3×10 9 Ω.cm、5.2×10 9 The document mentions that the above-mentioned oil agent, when used in spinning, is used with the aid of a water spray system equipped in the spinning workshop to improve the static discharge during the FDY processing.

[0005] Patent document CN117845379B discloses a preparation process of a highly efficient antistatic agent for chemical fiber oil, wherein the prepared nitrogen-sulfur doped Mxene is combined with an antistatic agent to obtain a new antistatic agent. The conductivity of the chemical fiber oil prepared by the antistatic agent is about 0.775~0.988mS / cm. However, the industrial large-scale preparation of Mxene material itself is difficult and the cost is high.

[0006] Patent document CN117127287 discloses a special oil for high-speed spinning of polyester that can be directly oiled with crude oil and a preparation method thereof, wherein potassium salt of fatty alcohol polyoxyethylene ether and / or potassium salt of isomeric alcohol polyoxyethylene phosphate ester are selected as antistatic agents, and the conductivity of the obtained chemical fiber oil is about 500-729 μS / cm. The oil adopts potassium salt antistatic agent, and the antistatic mechanism of the oil is single, which cannot meet the needs of different applications. Summary of the invention

[0007] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a highly antistatic crude oil type polyester FDY spinning oil and a preparation method, which adopts an antistatic smoothing agent and a main antistatic agent to synergistically increase the antistatic property. The oil component has been widely industrialized and has a low cost. No water spray system is required during spinning to meet the use requirements.

[0008] To achieve the above object, the technical solution adopted by the present invention is as follows: A high antistatic crude oil type polyester FDY spinning oil contains a main antistatic agent of a composition of sodium lauryl polyoxyethylene ether sulfate and potassium lauryl alcohol phosphate in a mass ratio of 1-1.5:1-2, and an antistatic lubricant containing sulfonated chitosan and PEG800. The content of the main antistatic agent in the oil is 4-10wt%, preferably not more than 10wt%, otherwise, it may have an adverse effect on the wettability of the oil.

[0009] Sodium lauryl polyoxyethylene ether sulfate itself has excellent antistatic properties. Its molecule contains sodium sulfate groups, which are negatively charged and can neutralize the positive charge on the fiber surface, thereby reducing static electricity accumulation. In addition, the polyoxyethylene ether chain with good hydrophilicity helps to enhance the wettability and stability of the oil. Moreover, the molecule also contains a long-chain alkyl group with strong hydrophobicity, which enables it to better adhere to the hydrophobic polyester fiber surface.

[0010] Potassium lauryl phosphate is an ionic antistatic agent. When its molecules come into contact with the surface of polyester FDY fibers, the hydrophobic chains in the molecules are adsorbed on the surface of polyester FDY fibers to form a continuous adsorption layer, and the hydrophilic groups face the air and form hydrogen bonds with water molecules in the air. The hydrogen bonds are neatly arranged to form a conductive film, which allows the accumulated charge on the fiber surface to dissipate quickly. In addition, polyethylene glycol oleate is added to the oil formula, which can produce a synergistic effect with potassium lauryl phosphate, enhancing the antistatic effect of the fiber.

[0011] The high antistatic crude oil polyester FDY spinning oil also contains 40-60wt% of sulfonated chitosan and PEG800 as the main components of the antistatic smoothing agent.

[0012] The preparation of the antistatic smoothing agent comprises the following steps: S1. Preparation of sulfonated chitosan solution: Weigh 13-17 parts of sodium 3-chloro-2-hydroxypropanesulfonate and dissolve it in 15-30 parts of deionized water for later use. Then weigh 1-5 parts of chitosan and dissolve it in 130-180 parts of 2% (volume fraction) acetic acid aqueous solution. Heat to 80°C-900°C. Use a constant pressure funnel to slowly add the sulfonate solution dropwise to the chitosan solution. Reflux for 9.5h-10.5h, dialyze and freeze-dry to obtain sulfonated chitosan.

[0013] S2. Preparation of antistatic lubricant: Weigh 3-5 parts of sulfonated chitosan and PEG800 in a mass ratio of 1-3:1-4, dissolve them in 8-12 parts of acetic acid solution, stir at 1000-1800 r / min for 20-40 min to mix the solution evenly, then slowly pour the mixed solution into 90-107 parts of white oil at 45-55°C and 800-1200 r / min, react for 0.45-1.25 h, and obtain an antistatic smoothing agent.

[0014] This antistatic lubricant not only has an excellent lubricating effect, but also can effectively neutralize the static charge on the fiber surface due to the presence of sulfonated groups, thereby significantly improving the antistatic performance of the oil. Sulfonated chitosan, as one of its raw materials, is not only safe, non-toxic, and degradable, but also has good biocompatibility and antibacterial properties, which conforms to the concept of green environmental protection.

[0015] The back side invention may also adopt the following further technical solutions simultaneously or in combination: The high antistatic crude oil type polyester FDY spinning oil of the present invention also contains 3-7wt% of a sizing agent, which is one or a combination of polyethylene glycol 400 oleate and polyethylene glycol dioleate. Polyethylene glycol oleate has excellent sizing properties, and polyethylene glycol oleate can produce a synergistic effect with phosphate ester to enhance the antistatic property of its lauryl alcohol phosphate potassium salt.

[0016] The high antistatic crude oil type polyester FDY spinning oil of the present invention also contains 30-36wt% of a penetrant, which is one or a combination of pentaerythritol polyoxyethylene ether and polyoxyethylene (20) sorbitan monooleate. The penetrant can increase the affinity between the oil and the fiber surface, promote the uniform distribution and penetration of the oil; in addition, the penetrant can also form an adsorption layer when adsorbed on the fiber surface, reduce the friction of the fiber surface, and thus reduce the static electricity on the fiber surface; at the same time, the penetrant has good compatibility with the main antistatic agent, and can enhance the overall antistatic property of the oil.

[0017] Since the water content in crude oil polyester FDY spinning oil is low, its antistatic effect is poor, which affects the product quality. The present invention enhances the antistatic effect of crude oil polyester FDY spinning oil by studying the action mode of the antistatic component in the oil formula, the structure-activity relationship of the components in the oil, and a self-made antistatic smoothing agent.

[0018] As the preferred technical solution: The high antistatic crude oil type polyester FDY spinning oil as described above also contains 2-5wt% of an anti-coking agent, which is a double-terminated surfactant of fatty acid methyl ester ethoxylate.

[0019] The water content of the high antistatic crude oil type polyester FDY spinning oil as described above does not exceed 8wt%.

[0020] As described above, a highly antistatic crude oil type polyester FDY spinning oil is used for direct crude oil application during polyester high-speed spinning. The spinning speed of polyester high-speed spinning is 4300m / min, the stretching temperature is 90°C, and the setting temperature is 170°C.

[0021] The present invention also provides a method for preparing a high antistatic polyester high-speed spinning special oil agent that can be directly oiled with crude oil as described in any of the above items, comprising the following steps: adding an antistatic smoothing agent, a penetrant, a bundling agent, a main antistatic agent, and an anti-coking agent in sequence, wherein each material is pre-balanced at 40°C to 50°C before adding; adding the materials while stirring to fully mix the materials; controlling the temperature of the reactor for mixing various materials at 40°C to 50°C, setting the stirring speed at 500 to 700 r / min, and reacting for 0.5 to 1.5 hours to obtain a crude oil type polyester FDY spinning oil agent.

[0022] Beneficial effects of the present invention: (1) The crude oil type polyester FDY spinning oil of the present invention can be used for polyester spinning by directly oiling with crude oil, without being prepared into an emulsion for use. Although the water content is small, it has good antistatic properties.

[0023] (2) The oil agent of the present invention uses a combination of sodium lauryl polyoxyethylene ether sulfate and potassium lauryl alcohol phosphate as the main antistatic agent, which can effectively reduce the generation of static electricity in the fiber and enable the spinning to proceed smoothly.

[0024] (3) The antistatic lubricant used in the oil of the present invention not only has good smoothness, but also has excellent antistatic properties, and can effectively neutralize the static charge on the fiber surface, and synergize with the main antistatic agent to greatly improve the antistatic property of the oil; in addition, the main raw material of the antistatic lubricant, sulfonated chitosan, also has the advantages of safety, non-toxicity, degradability, good biocompatibility, degradability, excellent antibacterial properties, etc., which conforms to the concept of green environmental protection.

[0025] (4) The oil agent of the present invention uses pentaerythritol polyoxyethylene ether and / or polyoxyethylene (20) sorbitan monooleate as a penetrant, which can not only increase the affinity between the oil agent and the fiber surface and promote the uniform distribution and penetration of the oil agent; it can also play the role of a non-ionic antistatic agent and has good compatibility with the main antistatic agent, thereby enhancing the overall antistatic property of the oil agent.

[0026] (5) The oil of the present invention gives full play to the structure-activity relationship and synergistic effect of each component and the performance of the oil, so that the antistatic property of the oil is greatly improved, and there is no need to use a water spray system to improve its antistatic property. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0028] The following are the performance test methods in each embodiment: Conductivity (10% aqueous solution): Water was added to the oil prepared in the following examples, with the mass of water accounting for 10% of the total solution, and the conductivity was measured according to GB / T11007.

[0029] Oil film strength: Use a four-ball friction tester to measure the oil film strength of the sample to be tested in accordance with GB / T 3142-1982 "Determination of the load-bearing capacity of lubricants (four-ball method)".

[0030] Surface tension (1% aqueous solution): measured at 25°C using a QBZY platinum plate surface tension meter (QBZY-1, Shanghai Fangrui Instrument Co., Ltd.).

[0031] Fiber resistivity: measured using an automatic digital fiber resistivity meter in accordance with GB / T14342-2015.

[0032] Fiber friction coefficient: measured by LFY-110 yarn dynamic friction tester (LFY-110, Shandong Textile Science Research Institute).

[0033] Oil content: The oil content was determined using a fiber grease quick extractor (Model YG981, Changzhou Shuanggu Dunda Electromechanical Technology Co., Ltd.) in accordance with the national standard GB / T6504-2008.

[0034] The following are the manufacturers and brands of the raw materials involved in the embodiments: Sodium lauryl polyoxyethylene ether sulfate: The manufacturer is Aladdin Reagent (Shanghai) Co., Ltd., the brand number is 68585-34-2.

[0035] Potassium lauryl phosphate: The manufacturer is Jiangsu Bost Chemical Technology Co., Ltd.

[0036] Sodium 3-chloro-2-hydroxypropanesulfonate: The manufacturer is Shanghai McLean Biochemical Technology Co., Ltd., and the brand number is 123-83-0.

[0037] Chitosan: The manufacturer is Shanghai McLean Biochemical Technology Co., Ltd., and the brand number is 9012-76-4.

[0038] Acetic acid: The manufacturer is Shanghai McLean Biochemical Technology Co., Ltd., and the brand number is 64-19-7.

[0039] PEG800: The manufacturer is Shanghai McLean Biochemical Technology Co., Ltd., and the brand number is 25322-68-3.

[0040] 1-Sodium hexadecane sulfonate: The manufacturer is Aladdin Reagent (Shanghai) Co., Ltd., the brand number is 15015-81-3.

[0041] Fatty alcohol polyoxyethylene ether phosphate potassium salt: The manufacturer is Guangdong Wengjiang Chemical Reagent Co., Ltd.

[0042] White oil (liquid paraffin): the manufacturer is Shanghai McLean Biochemical Technology Co., Ltd., the brand number is 8042-47-5.

[0043] Polyethylene glycol 400 oleate: The manufacturer is Aladdin Reagent (Shanghai) Co., Ltd., the brand number is 9004-96-0.

[0044] Polyethylene glycol dioleate: The manufacturer is Aladdin Reagent (Shanghai) Co., Ltd., and the brand number is 9005-07-6.

[0045] Pentaerythritol ethoxylate: The manufacturer is Merck Group, Darmstadt, Germany, and the brand number is 30599-15-6.

[0046] Polyoxyethylene (20) sorbitan monooleate: The manufacturer is Aladdin Reagent (Shanghai) Co., Ltd., the brand number is 9005-65-6.

[0047] Fatty acid methyl ester ethoxylate type double-end surfactant: the manufacturer is Aladdin Reagent (Shanghai) Co., Ltd., the brand number is 65218-33-7.

[0048] Embodiment 1 A method for preparing a high antistatic crude oil type polyester FDY spinning oil, the specific steps are as follows: (1) Preparation of raw materials; Sodium laureth sulfate; Potassium lauryl phosphate; Antistatic lubricant; Bunching agent: polyethylene glycol 400 oleate; Penetrant: Pentaerythritol ethoxylate; water; (2) Prepare the main antistatic agent; The main antistatic agent is prepared by mixing sodium lauryl polyoxyethylene ether sulfate and potassium lauryl alcohol phosphate in a mass ratio of 1:1; (3) Weigh 6 wt% of the main antistatic agent, 50 wt% of the antistatic smoothing agent, 5 wt% of the agglomerating agent, 34 wt% of the penetrant, 3 wt% of the anti-coking agent, and 2 wt% of water in proportion, and then pre-balance the materials at 45°C; then, add the antistatic smoothing agent, penetrant, agglomerating agent, main antistatic agent, and anti-coking agent in sequence while stirring; and then react at a temperature of 45°C and a stirring speed of 600 r / min for 1 h to obtain a crude oil type polyester FDY spinning oil.

[0049] The crude oil-based polyester FDY spinning oil finally obtained was yellow and transparent, with an electrical conductivity of 1178 μS / cm, an oil film strength of 744.8 N, and a surface tension of 33.49 mN / m.

[0050] The final polyester FDY fiber has a fiber specification of 70dtex / 48f and a fiber specific resistance of 2.7×10 7 Ω.cm, the fiber friction coefficient is 0.339, and the oil content is 0.6%.

[0051] Comparative Example 1 A method for preparing a highly antistatic crude oil type polyester FDY spinning oil is basically the same as that in Example 1, except that the main antistatic agent is composed of sodium lauryl polyoxyethylene ether sulfate only.

[0052] The crude oil-based polyester FDY spinning oil finally obtained was yellow and transparent, with an electrical conductivity of 812.3 μS / cm, an oil film strength of 744.8 N, and a surface tension of 35.44 mN / m.

[0053] The final polyester FDY fiber has a fiber specification of 69dtex / 48f and a fiber specific resistance of 7.1×10 7 Ω.cm, the fiber friction coefficient is 0.327, and the oil content is 0.5%.

[0054] Comparative Example 2 A method for preparing a highly antistatic crude oil type polyester FDY spinning oil is basically the same as that in Example 1, except that the main antistatic agent is composed only of potassium lauryl phosphate.

[0055] The crude oil-based polyester FDY spinning oil finally obtained was yellow and transparent, with an electrical conductivity of 915.5 μS / cm, an oil film strength of 744.8 N, and a surface tension of 34.27 mN / m.

[0056] The final polyester FDY fiber has a fiber specification of 69dtex / 48f and a fiber specific resistance of 5.5×10 7 Ω.cm, the fiber friction coefficient is 0.329, and the oil content is 0.5%.

[0057] Comparative Example 3 A method for preparing a highly antistatic crude oil type polyester FDY spinning oil is basically the same as that in Example 1, except that the smoothing agent consists only of white oil.

[0058] The crude oil-based polyester FDY spinning oil finally obtained was yellow and transparent, with an electrical conductivity of 782.9 μS / cm, an oil film strength of 695.8 N, and a surface tension of 34.36 mN / m.

[0059] The final polyester FDY fiber has a fiber specification of 70dtex / 48f and a fiber specific resistance of 7.8×10 7 Ω.cm, the fiber friction coefficient is 0.331, and the oil content is 0.4%.

[0060] Comparative Example 4 A method for preparing a highly antistatic crude oil type polyester FDY spinning oil is basically the same as that of comparative example 1, except that the antistatic agent is composed of sodium 1-hexadecane sulfonate and potassium salt of fatty alcohol polyoxyethylene ether phosphate; and the smoothing agent is composed of white oil.

[0061] The crude oil-based polyester FDY spinning oil finally obtained was yellow and transparent, with an electrical conductivity of 751.9 μS / cm, an oil film strength of 695.8 N, and a surface tension of 35.76 mN / m.

[0062] The final polyester FDY fiber has a fiber specification of 71dtex / 48f and a fiber specific resistance of 8.5×10 7 Ω.cm, the fiber friction coefficient is 0.4273, and the oil content is 0.5%.

[0063] Comparative Example 5 A method for preparing a highly antistatic crude oil type polyester FDY spinning oil is basically the same as that of comparative example 4, except that spinning is carried out under a water spray system.

[0064] The crude oil-based polyester FDY spinning oil finally obtained was yellow and transparent, with an electrical conductivity of 751.9 μS / cm, an oil film strength of 695.8 N, and a surface tension of 35.76 mN / m.

[0065] The final polyester FDY fiber has a fiber specification of 70dtex / 48f and a fiber specific resistance of 5.7×10 7 Ω.cm, the fiber friction coefficient is 0.3512, and the oil content is 0.5%.

[0066] Example 2 A method for preparing a high antistatic crude oil type polyester FDY spinning oil, the specific steps are as follows: (1) Preparation of raw materials; Sodium laureth sulfate; Potassium lauryl phosphate; Antistatic lubricant; Bunching agent: polyethylene glycol 400 oleate; Penetrant: Pentaerythritol ethoxylate; water; (2) Prepare the main antistatic agent; The main antistatic agent is prepared by mixing sodium lauryl polyoxyethylene ether sulfate and potassium lauryl alcohol phosphate in a mass ratio of 1:2; (3) Weigh 10 wt% of the main antistatic agent, 40 wt% of the antistatic smoothing agent, 7 wt% of the agglomerating agent, 36 wt% of the penetrant, 5 wt% of the anti-coking agent, and 2 wt% of water in proportion, and then pre-balance the materials at 40°C; then, add the antistatic smoothing agent, penetrant, agglomerating agent, main antistatic agent, and anti-coking agent in sequence while stirring; and then react at a temperature of 40°C and a stirring speed of 500 r / min for 0.5 h to obtain a crude oil type polyester FDY spinning oil.

[0067] The crude oil-based polyester FDY spinning oil finally obtained was yellow and transparent, with an electrical conductivity of 1156.9 μS / cm, an oil film strength of 695.8 N, and a surface tension of 37.55 mN / m.

[0068] The final polyester FDY fiber has a fiber specification of 69dtex / 48f and a fiber specific resistance of 2.9×10 7 Ω.cm, the fiber friction coefficient is 0.378, and the oil content is 0.7%.

[0069] Example 3 A method for preparing a high antistatic crude oil type polyester FDY spinning oil, the specific steps are as follows: (1) Preparation of raw materials; Sodium laureth sulfate; Potassium lauryl phosphate; Antistatic lubricant; Bunching agent: polyethylene glycol dioleate; Osmotic agent: polyoxyethylene (20) sorbitan monooleate; water; (2) Prepare the main antistatic agent; The main antistatic agent is prepared by mixing sodium lauryl polyoxyethylene ether sulfate and potassium lauryl alcohol phosphate in a mass ratio of 1.5:1; (3) Weigh 4 wt% of the main antistatic agent, 60 wt% of the antistatic smoothing agent, 3 wt% of the agglomerating agent, 30 wt% of the penetrant, 2 wt% of the anti-coking agent, and 1 wt% of water in proportion, and then pre-balance the materials at 50 °C; then, add the antistatic smoothing agent, penetrant, agglomerating agent, main antistatic agent, and anti-coking agent in sequence while stirring; and then react at a temperature of 50 °C and a stirring speed of 700 r / min for 1.5 h to obtain a crude oil type polyester FDY spinning oil.

[0070] The crude oil-based polyester FDY spinning oil finally obtained was yellow and transparent, with an electrical conductivity of 1069.1 μS / cm, an oil film strength of 695.8 N, and a surface tension of 32.43 mN / m.

[0071] The final polyester FDY fiber has a fiber specification of 68dtex / 48f and a fiber resistivity of 4.1×10 7 Ω.cm, the fiber friction coefficient is 0.308, and the oil content is 0.5%.

[0072] Example 4 A method for preparing a high antistatic crude oil type polyester FDY spinning oil, the specific steps are as follows: (1) Preparation of raw materials; Sodium laureth sulfate; Potassium lauryl phosphate; Antistatic lubricant; Sizing agent: a mixture of polyethylene glycol 400 oleate and polyethylene glycol dioleate in a mass ratio of 1:1; Penetrant: a mixture of pentaerythritol ethoxylate and polyoxyethylene (20) sorbitan monooleate in a mass ratio of 1:1; water; (2) Prepare the main antistatic agent; The main antistatic agent is prepared by mixing sodium lauryl polyoxyethylene ether sulfate and potassium lauryl alcohol phosphate in a mass ratio of 1.5:2; (3) Weigh 7 wt% of the main antistatic agent, 50 wt% of the antistatic smoothing agent, 5 wt% of the agglomerating agent, 34 wt% of the penetrant, 3 wt% of the anti-coking agent, and 1 wt% of water in proportion, and then pre-balance the materials at 48°C; then, add the antistatic smoothing agent, penetrant, agglomerating agent, main antistatic agent, and anti-coking agent in sequence while stirring; and then react at a temperature of 48°C and a stirring speed of 550 r / min for 1.25 h to obtain a crude oil type polyester FDY spinning oil.

[0073] The crude oil-based polyester FDY spinning oil finally obtained was yellow and transparent, with an electrical conductivity of 1075.4 μS / cm, an oil film strength of 744.8 N, and a surface tension of 31.97 mN / m.

[0074] The final polyester FDY fiber has a fiber specification of 70dtex / 48f and a fiber specific resistance of 3.7×10 7 Ω.cm, the fiber friction coefficient is 0.319, and the oil content is 0.6%.

[0075] Those skilled in the art should understand that the technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A high antistatic crude oil type polyester FDY spinning oil, characterized in that: The invention discloses a main antistatic agent containing sodium lauryl polyoxyethylene ether sulfate and potassium lauryl alcohol phosphate in a compounding ratio of 1-1.5:1-2 by mass, and an antistatic lubricant containing sulfonated chitosan and PEG800. The content of the main antistatic agent in the oil is 4-10wt%.

2. The high antistatic crude oil type polyester FDY spinning oil according to claim 1, characterized in that: The content of antistatic lubricant in the oil is 40~60wt%.

3. The high antistatic crude oil type polyester FDY spinning oil according to claim 1, characterized in that: The preparation of the antistatic smoothing agent comprises the following steps: S1. Preparation of sulfonated chitosan solution: Weigh 13-17 parts of sodium 3-chloro-2-hydroxypropanesulfonate and dissolve it in 15-30 parts of deionized water for later use, then weigh 1-5 parts of chitosan and dissolve it in 130-180 parts of 2% acetic acid aqueous solution, heat it to 80°C-900°C, slowly add the sulfonate solution dropwise to the chitosan solution using a constant pressure funnel, reflux for 9.5h-10.5h, dialyze, and freeze-dry to obtain sulfonated chitosan; S2. Preparation of antistatic lubricant: Weigh 3-5 parts of sulfonated chitosan and PEG800 in a mass ratio of 1-3:1-4, dissolve them in 8-12 parts of acetic acid solution, stir at 1000-1800 r / min for 20-40 min to mix the solution evenly, then slowly pour the mixed solution into 90-107 parts of white oil at 45-55°C and 800-1200 r / min, react for 0.45-1.25 h, and obtain an antistatic smoothing agent.

4. The high antistatic crude oil type polyester FDY spinning oil according to claim 1, characterized in that: The high antistatic crude oil type polyester FDY spinning oil also contains 3-7wt% of a sizing agent, which is one or a combination of polyethylene glycol 400 oleate and polyethylene glycol dioleate.

5. The high antistatic crude oil type polyester FDY spinning oil according to claim 1, characterized in that: The high antistatic crude oil type polyester FDY spinning oil further contains 30-36wt% of a penetrant, and the penetrant is one or a combination of pentaerythritol polyoxyethylene ether and polyoxyethylene (20) sorbitan monooleate.

6. The high antistatic crude oil type polyester FDY spinning oil according to claim 1, characterized in that: The high antistatic crude oil type polyester FDY spinning oil also contains 2-5wt% of an anti-coking agent, which is a double-terminated surfactant of fatty acid methyl ester ethoxylate.

7. The high antistatic crude oil type polyester FDY spinning oil according to claim 1, characterized in that: The water content in the high antistatic crude oil type polyester FDY spinning oil does not exceed 8wt%.

8. The high antistatic crude oil type polyester FDY spinning oil according to claim 1, characterized in that: In the process of polyester high-speed spinning, crude oil type polyester FDY spinning oil agent is used for crude oil direct oiling. The spinning speed of polyester high-speed spinning is 4300m / min, the stretching temperature is 90℃, and the setting temperature is 170℃.

9. A method for preparing a highly antistatic crude oil type polyester FDY spinning oil, comprising preparing the highly antistatic crude oil type polyester FDY spinning oil according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: adding an antistatic lubricant, a penetrant, a clustering agent, a main antistatic agent and an anti-coking agent in sequence, wherein each material is pre-balanced at 40°C to 50°C before adding, and the materials are added while stirring to ensure that each material is fully mixed.

10. The method for preparing the high antistatic crude oil type polyester FDY spinning oil according to claim 9, characterized in that: The method comprises the following steps: controlling the temperature of a reactor for mixing various materials at 40°C to 50°C, setting the stirring speed at 500 to 700 r / min, and reacting for 0.5 to 1.5 hours.