A high antistatic crude oil type polyester FDY spinning finish and its preparation method

Abstract

The present invention relates to a high antistatic crude oil type polyester FDY spinning finish and its preparation method. The composition of sodium lauryl polyoxyethylene ether sulfate and potassium lauryl phosphate is used as the main antistatic agent, and an antistatic smoothing agent with sulfonated chitosan and PEG800 as key components is adopted. The antistatic smoothing agent and the main antistatic agent act synergistically to enhance the overall antistatic property of the finish. Preparation method: Each material is pre-equilibrated at 40°C to 50°C before feeding; then, the antistatic smoothing agent, penetrant, bundling agent, main antistatic agent, and anti-coking agent are added in sequence while stirring; finally, the temperature of the reaction kettle is controlled at 40°C to 50°C, the stirring speed is 500 to 700 r / min, and the reaction is carried out for 0.5 to 1.5 h. The present invention is a crude oil type polyester FDY finish with excellent antistatic property, and can carry out polyester FDY spinning in the way of directly applying oil with crude oil at a super high 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 method of a high-efficiency antistatic agent for chemical fiber oil agents. The prepared nitrogen and sulfur-doped Mxene is combined with an antistatic agent to obtain a new type of antistatic agent. The conductivity of the chemical fiber oil agent prepared with this antistatic agent is about 0.775 - 0.988 mS / 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 agent for high-speed spinning of polyester that can be directly oiled with crude oil and its preparation method. Fatty alcohol polyoxyethylene ether potassium salt and / or isomeric alcohol polyoxyethylene phosphate potassium salt are selected as antistatic agents. The conductivity of the chemical fiber oil agent prepared is about 500 - 729 μS / cm. This oil agent uses potassium salt antistatic agents, and the antistatic mechanism of the oil agent is single and cannot meet the requirements of different applications. Summary of the Invention

[0007] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a high antistatic crude oil type polyester FDY spinning oil agent and its preparation method. An antistatic type leveling agent and a main antistatic agent are used synergistically to increase antistatic performance. It has excellent antistatic performance. The components of the oil agent have been widely industrialized, with low cost, and do not require a water spray system during spinning to meet the usage requirements.

[0008] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0009] A high antistatic crude oil type polyester FDY spinning oil agent contains a main antistatic agent which is a combination of sodium lauryl polyoxyethylene ether sulfate and potassium lauryl phosphate with a mass ratio of 1 - 1.5:1 - 2, and uses an antistatic type leveling agent containing sulfonated chitosan and PEG800. And the content of the main antistatic agent in the oil agent is 4 - 10 wt%, preferably not exceeding 10 wt%, otherwise, it may have an adverse effect on the wettability of the oil agent.

[0010] Sodium lauryl polyoxyethylene ether sulfate itself has excellent antistatic properties. Its molecule contains a sodium sulfate group, which is negatively charged and can neutralize the positive charge on the fiber surface, thus reducing static electricity accumulation; in addition, the hydrophilic polyoxyethylene ether chain helps to enhance the wettability and stability of the oil agent; and, the molecule also contains a long-chain alkyl group with strong hydrophobicity, which enables it to adhere well to the hydrophobic polyester fiber surface.

[0011] Potassium lauryl phosphate belongs to ionic antistatic agents. When its molecules come into contact with the surface of polyester FDY fibers, the hydrophobic chains in the molecules adsorb on the surface of polyester FDY fibers to form a continuous adsorption layer, with the hydrophilic groups facing the air and forming hydrogen bonds with water molecules in the air. The hydrogen bonds are arranged neatly to form a conductive film, enabling the charges accumulated on the fiber surface to dissipate quickly. In addition, polyethylene glycol oleate is added to the oil agent formulation, which can produce a synergistic effect with potassium lauryl phosphate, enhancing the antistatic effect of the fibers.

[0012] The high antistatic crude oil-type polyester FDY spinning oil agent also contains an antistatic smoothing agent with 40 - 60 wt% of sulfonated chitosan and PEG800 as the main compounding components.

[0013] The preparation of the antistatic smoothing agent includes the following steps:

[0014] S1. Preparation of sulfonated chitosan solution:

[0015] Weigh 13 - 17 parts of sodium 3-chloro-2-hydroxypropanesulfonate and dissolve it in 15 - 30 parts of deionized water for standby. Then weigh 1 - 5 parts of chitosan and dissolve it in 130 - 180 parts of 2% (volume fraction) acetic acid aqueous solution. Heat it to 80℃ - 90℃, and slowly drip the sulfonate solution into the chitosan solution using a constant pressure funnel. Reflux for 9.5h - 10.5h, then dialyze and freeze-dry to obtain sulfonated chitosan.

[0016] S2. Preparation of the antistatic smoothing agent:

[0017] Weigh 3 - 5 parts of sulfonated chitosan and PEG800, with their mass ratio being 1 - 3:1 - 4, and dissolve them in 8 - 12 parts of acetic acid solution. Stir at a speed of 1000 - 1800r / min for 20 - 40min to make the solution evenly mixed. Then, under the conditions of 45 - 55℃ and 800 - 1200r / min, slowly pour the evenly mixed solution into 90 - 107 parts of white oil and react for 0.45 - 1.25h to obtain the antistatic smoothing agent.

[0018] This antistatic smoothing agent not only has excellent smoothing effects, but also, due to the presence of sulfonated groups, can effectively neutralize the static charges on the fiber surface, thus significantly improving the antistatic performance of the oil agent. As one of its raw materials, sulfonated chitosan is not only safe, non-toxic, and biodegradable, but also has good biocompatibility and antibacterial properties, meeting the concept of green environmental protection.

[0019] The invention on the back can also simultaneously adopt or combinatorially adopt the following further technical solutions:

[0020] The high antistatic crude oil type polyester FDY spinning finish of the present invention further contains 3-7 wt% of a bundling agent, and the bundling agent is one or a combination of polyethylene glycol 400 oleate and polyethylene glycol dioleate. Polyethylene glycol oleate has excellent bundling properties. In addition, polyethylene glycol oleate can produce a synergistic effect with phosphate esters, enhancing the antistatic property of its potassium lauryl phosphate salt.

[0021] The high antistatic crude oil type polyester FDY spinning finish of the present invention further contains 30-36 wt% of a penetrant, and the penetrant is one or a combination of pentaerythritol polyoxyethylene ether and polyoxyethylene (20) sorbitan monooleate. This penetrant can increase the affinity between the finish and the fiber surface, promoting the uniform distribution and penetration of the finish; in addition, this penetrant can also form an adsorption layer on the fiber surface, reducing the friction on the fiber surface, thereby reducing the static electricity on the fiber surface; at the same time, this penetrant has good compatibility with the main antistatic agent, which can enhance the overall antistatic property of the finish.

[0022] Since the water content in the crude oil type polyester FDY spinning finish is relatively low, resulting in poor antistatic effect and affecting the product quality. The present invention enhances the antistatic effect of the crude oil type polyester FDY spinning finish by studying the action mode of the antistatic components in the finish formulation, the structure-activity relationship of the components in the finish, and self-preparing an antistatic type smoothing agent.

[0023] As a preferred technical solution:

[0024] The high antistatic crude oil type polyester FDY spinning finish as described above further contains 2-5 wt% of an anti-coking agent, and the anti-coking agent is a fatty acid methyl ester ethoxylate type double-capped surfactant.

[0025] The water content in the high antistatic crude oil type polyester FDY spinning finish as described above does not exceed 8 wt%.

[0026] For the high antistatic crude oil type polyester FDY spinning finish as described above, during the high-speed spinning of polyester, direct oiling of crude oil is carried out using the crude oil type polyester FDY spinning finish. The spinning speed of the high-speed spinning of polyester is 4300 m / min, the stretching temperature is 90 °C, and the setting temperature is 170 °C.

[0027] The present invention also provides a method for preparing a special spinning finish for high-speed spinning of polyester that can be directly oiled with crude oil and has high antistatic performance as described in any one of the above, comprising the following steps: successively adding an antistatic smoothing agent, a penetrant, a bundling agent, a main antistatic agent, and an anti-coking agent, wherein each material is pre-equilibrated at 40°C to 50°C before feeding; adopting a feeding method while stirring to make each material fully and evenly mixed; controlling the temperature of the reaction kettle 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 h to obtain a crude oil-type polyester FDY spinning finish.

[0028] Advantages of the present invention:

[0029] (1) The crude oil-type polyester FDY spinning finish of the present invention can be used for polyester spinning by directly oiling with crude oil, without the need to be formulated into an emulsion for use. Although it has a low water content, it has good antistatic performance.

[0030] (2) The finish of the present invention uses a combination of sodium lauryl polyoxyethylene ether sulfate and potassium lauryl phosphate as the main antistatic agent, which can effectively reduce the generation of static electricity in the fiber and enable smooth spinning.

[0031] (3) The antistatic smoothing agent used in the finish of the present invention not only has good smoothness but also excellent antistatic properties, can effectively neutralize the static charges on the fiber surface, and synergistically acts with the main antistatic agent to greatly improve the antistatic property of the finish; in addition, the main raw material of this antistatic smoothing agent, sulfonated chitosan, also has the advantages of safety, non-toxicity, biodegradability, good biocompatibility, degradability, and excellent antibacterial properties, meeting the concept of green environmental protection.

[0032] (4) The finish of the present invention uses pentaerythritol polyoxyethylene ether and / or polyoxyethylene (20) sorbitan monooleate as the penetrant, which can not only increase the affinity between the finish and the fiber surface, promote the uniform distribution and penetration of the finish; but 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 finish.

[0033] (5) The finish of the present invention fully exerts the structure-activity relationship and synergistic effect between each component and the performance of the finish, greatly improving the antistatic property of the finish, without the need to rely on a water spray system to improve its antistatic property. Detailed embodiments

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0035] The following are the performance test methods in each embodiment:

[0036] Conductivity (10% aqueous solution): Water was added to the oil agent prepared in each of the following embodiments, with water accounting for 10% of the total solution mass, and measured according to GB / T 11007.

[0037] Oil film strength: A four-ball friction tester was used to measure the oil film strength of the sample to be tested with reference to GB / T 3142-1982 "Method for Determining the Load-Carrying Capacity of Lubricants (Four-Ball Method)".

[0038] Surface tension (1% aqueous solution): Measured at 25 °C using a QBZY type platinum plate surface tension meter (QBZY-1 type, Shanghai Fangrui Instrument Co., Ltd.).

[0039] Fiber specific resistance: Measured using an automatic digital fiber specific resistance meter according to GB / T 14342-2015.

[0040] Fiber friction coefficient: Measured using an LFY-110 type yarn dynamic friction tester (LFY-110 type, Shandong Textile Science Research Institute).

[0041] Oil content: Measured using a fiber oil extractor (YG981 type, Changzhou Shuanggu Dunda Electromechanical Technology Co., Ltd.) according to the national standard GB / T 6504-2008.

[0042] The following are the manufacturers and grades of the raw materials involved in the embodiments:

[0043] Sodium lauryl polyoxyethylene ether sulfate: The manufacturer is Aladdin Reagent (Shanghai) Co., Ltd., and the grade is 68585-34-2.

[0044] Potassium lauryl phosphate: The manufacturer is Jiangsu Bost Chemical Technology Co., Ltd.

[0045] Sodium 3-chloro-2-hydroxypropanesulfonate: The manufacturer is Shanghai Macklin Biochemical Technology Co., Ltd., and the grade is 123-83-0.

[0046] Chitosan: The manufacturer is Shanghai Macklin Biochemical Technology Co., Ltd., and the grade is 9012-76-4.

[0047] Acetic acid: The manufacturer is Shanghai Macklin Biochemical Technology Co., Ltd., and the grade is 64-19-7.

[0048] PEG800: The manufacturer is Shanghai Macklin Biochemical Technology Co., Ltd., and the grade is 25322-68-3.

[0049] Sodium 1-hexanesulfonate: The manufacturer is Aladdin Reagent (Shanghai) Co., Ltd., and the grade is 15015-81-3.

[0050] Potassium alcohol polyoxyethylene ether phosphate: The manufacturer is Guangdong Wengjiang Chemical Reagent Co., Ltd.

[0051] White oil (liquid paraffin): The manufacturer is Shanghai Macklin Biochemical Co., Ltd., and the product number is 8042-47-5.

[0052] Polyethylene glycol 400 oleate: The manufacturer is Aladdin Reagent (Shanghai) Co., Ltd., and the product number is 9004-96-0.

[0053] Polyethylene glycol dioleate: The manufacturer is Aladdin Reagent (Shanghai) Co., Ltd., and the product number is 9005-07-6.

[0054] Pentaerythritol ethoxylate: The manufacturer is Merck KGaA, Darmstadt, Germany, and the product number is 30599-15-6.

[0055] Polyoxyethylene (20) sorbitan monooleate: The manufacturer is Aladdin Reagent (Shanghai) Co., Ltd., and the product number is 9005-65-6.

[0056] Fatty acid methyl ester ethoxylate double-capped surfactant: The manufacturer is Aladdin Reagent (Shanghai) Co., Ltd., and the product number is 65218-33-7.

[0057] Example 1

[0058] A preparation method of a high antistatic crude oil type polyester FDY spinning finish, the specific steps are as follows:

[0059] (1) Preparation of raw materials;

[0060] Sodium lauryl polyoxyethylene ether sulfate;

[0061] Potassium lauryl phosphate;

[0062] Antistatic smoothing agent;

[0063] Clustering agent: Polyethylene glycol 400 oleate;

[0064] Penetrant: Pentaerythritol ethoxylate;

[0065] Water;

[0066] (2) Preparation of the main antistatic agent;

[0067] Prepare a mixture of sodium lauryl polyoxyethylene ether sulfate and potassium lauryl phosphate with a mass ratio of 1:1 to obtain the main antistatic agent;

[0068] (3) Weigh 6 wt% of the main antistatic agent, 50 wt% of the antistatic smoothing agent, 5 wt% of the bundling agent, 34 wt% of the penetrant, 3 wt% of the anti-coking agent, and 2 wt% of water in proportion. Then pre-equilibrate each material at 45°C. Next, add the antistatic smoothing agent, penetrant, bundling agent, main antistatic agent, and anti-coking agent in sequence in a way of adding while stirring. Then react at a temperature of 45°C and a stirring speed of 600 r / min for 1 h to obtain the crude oil type polyester FDY spinning finish.

[0069] The finally obtained crude oil type polyester FDY spinning finish presents a yellow transparent state, with a conductivity of 1178 μS / cm, an oil film strength of 744.8 N, and a surface tension of 33.49 mN / m.

[0070] The finally obtained polyester FDY fiber has a fiber specification of 70 dtex / 48f, a fiber specific resistance of 2.7×10 7 Ω·cm, a fiber friction coefficient of 0.339, and an oil content of 0.6%.

[0071] Comparative Example 1

[0072] A preparation method of a high antistatic crude oil type polyester FDY spinning finish is basically the same as that of Example 1, except that: the main antistatic agent consists only of sodium lauryl polyoxyethylene ether sulfate.

[0073] The finally obtained crude oil type polyester FDY spinning finish presents a yellow transparent state, with a conductivity of 812.3 μS / cm, an oil film strength of 744.8 N, and a surface tension of 35.44 mN / m.

[0074] The finally obtained polyester FDY fiber has a fiber specification of 69 dtex / 48f, a fiber specific resistance of 7.1×10 7 Ω·cm, a fiber friction coefficient of 0.327, and an oil content of 0.5%.

[0075] Comparative Example 2

[0076] A preparation method of a high antistatic crude oil type polyester FDY spinning finish is basically the same as that of Example 1, except that: the main antistatic agent consists only of potassium lauryl phosphate.

[0077] The finally obtained crude oil type polyester FDY spinning finish presents a yellow transparent state, with a conductivity of 915.5 μS / cm, an oil film strength of 744.8 N, and a surface tension of 34.27 mN / m.

[0078] The finally obtained polyester FDY fiber has a fiber specification of 69 dtex / 48f, a fiber specific resistance of 5.5×10 7Ω·cm, the fiber friction coefficient is 0.329, and the oil content is 0.5%.

[0079] Comparative Example 3

[0080] A preparation method of a high antistatic crude oil type polyester FDY spinning finish is basically the same as that of Example 1, except that: the smoothing agent consists only of white oil.

[0081] The finally prepared crude oil type polyester FDY spinning finish presents a yellow transparent state, the conductivity is 782.9 μS / cm, the oil film strength is 695.8 N, and the surface tension is 34.36 mN / m.

[0082] The finally prepared polyester FDY fiber, the fiber specification is 70 dtex / 48 f, and the fiber specific resistance is 7.8×10 7 Ω·cm, the fiber friction coefficient is 0.331, and the oil content is 0.4%.

[0083] Comparative Example 4

[0084] A preparation method of a high antistatic crude oil type polyester FDY spinning finish is basically the same as that of Comparative Example 1, except that: the antistatic agent consists of sodium hexadecane sulfonate and potassium fatty alcohol polyoxyethylene ether phosphate; the smoothing agent consists of white oil.

[0085] The finally prepared crude oil type polyester FDY spinning finish presents a yellow transparent state, the conductivity is 751.9 μS / cm, the oil film strength is 695.8 N, and the surface tension is 35.76 mN / m.

[0086] The finally prepared polyester FDY fiber, the fiber specification is 71 dtex / 48 f, and the fiber specific resistance is 8.5×10 7 Ω·cm, the fiber friction coefficient is 0.4273, and the oil content is 0.5%.

[0087] Comparative Example 5

[0088] A preparation method of a high antistatic crude oil type polyester FDY spinning finish is basically the same as that of Comparative Example 4, except that: spinning is carried out under a water spray system.

[0089] The finally prepared crude oil type polyester FDY spinning finish presents a yellow transparent state, the conductivity is 751.9 μS / cm, the oil film strength is 695.8 N, and the surface tension is 35.76 mN / m.

[0090] The finally prepared polyester FDY fiber, the fiber specification is 70 dtex / 48 f, and the fiber specific resistance is 5.7×10 7 Ω·cm, the fiber friction coefficient is 0.3512, and the oil content is 0.5%.

[0091] Example 2

[0092] A preparation method of a high antistatic crude oil type polyester FDY spinning finish, the specific steps are as follows:

[0093] (1) Preparation of raw materials;

[0094] Sodium lauryl polyoxyethylene ether sulfate;

[0095] Potassium lauryl phosphate;

[0096] Antistatic smoothing agent;

[0097] Bundle agent: polyethylene glycol 400 oleate;

[0098] Penetrant: pentaerythritol ethoxylate;

[0099] Water;

[0100] (2) Preparation of the main antistatic agent;

[0101] Sodium lauryl polyoxyethylene ether sulfate and potassium lauryl phosphate with a mass ratio of 1:2 are prepared to obtain the main antistatic agent;

[0102] (3) Weigh 10 wt% of the main antistatic agent, 40 wt% of the antistatic smoothing agent, 7 wt% of the bundle agent, 36 wt% of the penetrant, 5 wt% of the anti-coking agent, and 2 wt% of water in proportion, and then pre-equilibrate the various materials at 40 °C; then, in a way of adding materials while stirring, add the antistatic smoothing agent, penetrant, bundle agent, main antistatic agent, and anti-coking agent in sequence; then react at a temperature of 40 °C and a stirring speed of 500 r / min for 0.5 h to obtain the crude oil type polyester FDY spinning finish.

[0103] The finally obtained crude oil type polyester FDY spinning finish presents a yellow transparent state, with a conductivity of 1156.9 μS / cm, an oil film strength of 695.8 N, and a surface tension of 37.55 mN / m.

[0104] The finally obtained polyester FDY fiber has a fiber specification of 69 dtex / 48 f, a fiber specific resistance of 2.9×10 7 Ω·cm, a fiber friction coefficient of 0.378, and an oil content of 0.7%.

[0105] Example 3

[0106] A preparation method of a high antistatic crude oil type polyester FDY spinning finish, the specific steps are as follows:

[0107] (1) Preparation of raw materials;

[0108] Sodium lauryl polyoxyethylene ether sulfate;

[0109] Potassium lauryl phosphate

[0110] Antistatic smoothing agent

[0111] Clustering agent: polyethylene glycol dioleate

[0112] Penetrant: polyoxyethylene (20) sorbitan monooleate

[0113] Water

[0114] (2) Prepare the main antistatic agent

[0115] Prepare sodium lauryl polyoxyethylene ether sulfate and potassium lauryl phosphate with a mass ratio of 1.5:1 to obtain the main antistatic agent

[0116] (3) Weigh 4 wt% of the main antistatic agent, 60 wt% of the antistatic smoothing agent, 3 wt% of the clustering agent, 30 wt% of the penetrant, 2 wt% of the anti-coking agent, and 1 wt% of water in proportion. Then pre-equilibrate each material at 50°C. Then, in the way of adding materials while stirring, add the antistatic smoothing agent, penetrant, clustering agent, main antistatic agent, and anti-coking agent in sequence. Then react at a temperature of 50°C and a stirring speed of 700 r / min for 1.5 h to obtain the crude oil type polyester FDY spinning finish

[0117] The finally prepared crude oil type polyester FDY spinning finish presents a yellow transparent state, with a conductivity of 1069.1 μS / cm, an oil film strength of 695.8 N, and a surface tension of 32.43 mN / m

[0118] The finally prepared polyester FDY fiber has a fiber specification of 68 dtex / 48 f, a fiber specific resistance of 4.1×10 7 Ω·cm, a fiber friction coefficient of 0.308, and an oil content of 0.5%

[0119] Example 4

[0120] A preparation method of a high antistatic crude oil type polyester FDY spinning finish, the specific steps are as follows

[0121] (1) Preparation of raw materials

[0122] Sodium lauryl polyoxyethylene ether sulfate

[0123] Potassium lauryl phosphate

[0124] Antistatic smoothing agent

[0125] Clustering agent: a mixture of polyethylene glycol 400 oleate and polyethylene glycol dioleate with a mass ratio of 1:1

[0126] Penetrant: A mixture of pentaerythritol ethoxylate and polyoxyethylene (20) sorbitan monooleate with a mass ratio of 1:1;

[0127] Water;

[0128] (2) Prepare the main antistatic agent;

[0129] Prepare a mixture of sodium lauryl polyoxyethylene ether sulfate and potassium lauryl phosphate with a mass ratio of 1.5:2 to obtain the main antistatic agent;

[0130] (3) Weigh 7 wt% of the main antistatic agent, 50 wt% of the antistatic smoothing agent, 5 wt% of the bundling agent, 34 wt% of the penetrant, 3 wt% of the anti-coking agent, and 1 wt% of water in proportion. Then pre-equilibrate the various materials at 48 °C. Then, in the way of adding materials while stirring, add the antistatic smoothing agent, penetrant, bundling agent, main antistatic agent, and anti-coking agent in sequence. Then react at a temperature of 48 °C and a stirring speed of 550 r / min for 1.25 h to obtain the crude oil type polyester FDY spinning finish.

[0131] The finally prepared crude oil type polyester FDY spinning finish presents a yellow transparent state, with a conductivity of 1075.4 μS / cm, an oil film strength of 744.8 N, and a surface tension of 31.97 mN / m.

[0132] The finally prepared polyester FDY fiber has a fiber specification of 70 dtex / 48f, a fiber specific resistance of 3.7×10 7 Ω.cm, a fiber friction coefficient of 0.319, and an oil content of 0.6%.

[0133] Those skilled in the art should understand that the technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as within the scope described in this specification.

[0134] The above embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

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

2. The high antistatic crude oil type polyester FDY spinning finish according to claim 1, characterized in that, The content of the antistatic smoothing agent in the spinning finish is 40 - 60 wt%.

3. The high antistatic crude oil type polyester FDY spinning finish according to claim 1, characterized in that, The preparation of the antistatic smoothing agent includes the following steps: S1. Preparation of sulfonated chitosan solution: Weigh 13 - 17 parts of sodium 3 - chloro - 2 - hydroxypropyl sulfonate and dissolve it in 15 - 30 parts of deionized water for standby. Then weigh 1 - 5 parts of chitosan and dissolve it in 130 - 180 parts of 2% acetic acid aqueous solution by volume. Heat it up to 80℃ - 90℃, and slowly drip the sulfonate solution into the chitosan solution with a constant pressure funnel. Reflux for 9.5h - 10.5h, dialyze and freeze - dry to obtain sulfonated chitosan; S2. Preparation of the antistatic smoothing agent: Weigh 3 - 5 parts of sulfonated chitosan and PEG800, with a mass ratio of 1 - 3:1 - 4 between them, and dissolve them in 8 - 12 parts of acetic acid solution. Stir at a speed of 1000 - 1800r / min for 20 - 40min to make the solution evenly mixed. Then, under the conditions of 45 - 55℃ and 800 - 1200r / min, slowly pour the evenly mixed solution into 90 - 107 parts of white oil and react for 0.45 - 1.25h to obtain the antistatic smoothing agent.

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

5. The high antistatic crude oil type polyester FDY spinning finish according to claim 1, characterized in that The high - antistatic crude - oil - type polyester FDY spinning finish also contains 30 - 36 wt% 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 finish according to claim 1, characterized in that, The high - antistatic crude - oil - type polyester FDY spinning finish also contains 2 - 5 wt% of an anti - coking agent, and the anti - coking agent is a fatty acid methyl ester ethoxylate - type double - capped surfactant.

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

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

9. A preparation method of a high antistatic crude oil type polyester FDY spinning finish, characterized in that, It includes the following steps: sequentially add the antistatic smoothing agent, penetrant, bundling agent, main antistatic agent, and anti - coking agent. Before adding each material, pre - balance it under the conditions of 40℃ - 50℃, and adopt the method of adding while stirring to make each material fully and evenly mixed. The main antistatic agent is a composition containing sodium lauryl polyoxyethylene ether sulfate and potassium lauryl phosphate with a compounding ratio of 1 - 1.5:1 - 2 by mass, the antistatic smoothing agent is sulfonated chitosan and PEG800, and the content of the main antistatic agent in the spinning finish is 4 - 10 wt%.

10. The preparation method of the high antistatic crude oil type polyester FDY spinning finish according to claim 9, characterized in that, It includes the following steps: 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 h.