POY (polyester pre-oriented yarn) and production process thereof

Abstract

The invention discloses a POY (polyester pre-oriented yarn) and a production process thereof, and relates to the technical field of spinning processes, the production process comprises the following steps: S1, adding hydrophilic antistatic copolyester chips into a screw extruder for melt extrusion to obtain a melt; s2, the melt is pressed into a spinning assembly for spinning after being filtered through a filter, tows pass through a windless area, circular air blowing cooling, oiling, pre-interlacing, drafting and winding treatment are carried out, and POY blank yarn is prepared; s3, pre-treating the POY blank filaments, soaking the pre-treated POY blank filaments in the after-finishing liquid, and drying to obtain POY filaments; the after-finishing liquid is prepared from the following raw materials in parts by weight: 0.02 to 0.04 part of sulfonated graphene, 0.4 to 0.6 part of a compound surfactant and 100 parts of water; the hydrophilic antistatic copolyester chip is prepared from the following raw materials in parts by weight: 33.4 to 66.8 parts of ethylene glycol terephthalate oligomer, 24.8 to 59.6 parts of ethylene glycol, 2.3 to 4.6 parts of catalyst, 5.6 to 11.2 parts of nylon 6 and 10.4 to 20.8 parts of polyethylene glycol. The anti-static spinning fabric has high anti-static capacity and spinnability.

Description

Technical Field

[0001] The present application relates to the technical field of spinning technology, and in particular to a POY yarn and a production process thereof. Background Art

[0002] Polyester fiber is the largest variety of synthetic fiber at present. It is a high molecular compound and is often used as a textile material. It is made by polycondensation of organic dibasic acid and diol. It is commonly known as polyester (PET). It has good wrinkle resistance and shape retention, high strength and elastic recovery. Polyester is divided into two categories: polyester filament and polyester staple fiber. Polyester staple fiber refers to short fibers with a length of several centimeters to more than ten centimeters. Polyester filament refers to a thread with a length of more than one kilometer. The filament is wound into a ball.

[0003] Polyester filament is divided into primary filament, drawn filament and textured filament according to the production method. POY filament is a kind of primary filament. POY filament, also known as pre-oriented filament, refers to the unstretched polyester filament obtained by high-speed spinning with an orientation degree between unoriented filament and drawn filament. Compared with unstretched filament, POY filament has good stability because it has a certain degree of orientation. POY filament is then woven into corresponding fabrics.

[0004] Since polyester molecules are bonded by covalent bonds, they neither produce ionization nor transfer electrons, and are prone to generate and accumulate charges. In addition, there are few neutral groups in POY yarns, which are highly hydrophobic and difficult to disperse the accumulated charges. Therefore, POY yarns are prone to generate a large amount of static electricity during the winding process, causing safety accidents. Summary of the invention

[0005] In order to improve the hydrophilic and antistatic properties of POY yarn, the present application provides a POY yarn and a production process thereof.

[0006] The present application provides a POY yarn production process, which adopts the following technical solution: A production process for POY yarn comprises the following steps: S1. The hydrophilic antistatic copolyester chips are added to a screw extruder for melt extrusion to obtain a melt; S2. The melt is filtered through a filter and then pressed into a spinning assembly for spinning. The tow is subjected to a windless zone, annular air cooling, oiling, pre-networking, drawing, and winding to obtain a POY blank yarn; S3. After the POY yarn is pretreated, it is immersed in a finishing solution and dried to obtain a POY yarn; The raw materials of the post-finishing liquid include, by weight: 0.02-0.04 parts of sulfonated graphene, 0.4-0.6 parts of a compound surfactant, and 100 parts of water.

[0007] By adopting the above technical scheme, a hydrophilic antistatic copolyester is obtained by final polycondensation of oligomers, the hydrophilicity of polyester is improved, thereby increasing the moisture regain of the fiber, and reducing the volume resistivity to achieve the antistatic purpose; after the POY blank yarn is prepared, the POY blank yarn is post-finished with sulfonated graphene, and the sulfonated graphene has strong waterproof and antistatic properties, which greatly improves the antistatic properties of the POY yarn after finishing.

[0008] Preferably, the hydrophilic antistatic copolyester chips are made of the following raw materials in parts by weight: 33.4-66.8 parts of ethylene terephthalate oligomer, 24.8-59.6 parts of ethylene glycol, 2.3-4.6 parts of catalyst, 5.6-11.2 parts of nylon 6, and 10.4-20.8 parts of polyethylene glycol.

[0009] By adopting the above technical scheme, a hydrophilic antistatic copolyester is prepared by final polycondensation of ethylene terephthalate oligomer, and nylon 6 and polyethylene glycol are added for copolymerization reaction, thereby effectively improving the hydrophilicity and antistatic properties of the polyester material.

[0010] Preferably, the catalyst is antimony trioxide.

[0011] Preferably, the method for preparing the hydrophilic antistatic copolyester chips comprises the following steps: Put ethylene terephthalate oligomer and ethylene glycol into a polymerization kettle, add a catalyst, heat to 210-230°C, start stirring, and the stirring speed is 80-100rpm. Raise the temperature. When the temperature reaches 245-265°C, add nylon 6 and polyethylene glycol. After stirring for 15-30 minutes, draw a low vacuum, and pre-polycondense for 30-60 minutes; draw a high vacuum, and carry out polycondensation at 265-280°C for 2.5-5 hours. After the reaction is completed, discharge, granulate and dry to obtain hydrophilic antistatic copolyester chips.

[0012] Preferably, the sulfonated graphene is made of the following raw materials in parts by weight: 100 parts of water, 0.1-0.3 parts of graphene oxide, 0.05-0.15 parts of sodium borohydride, 2.1-4.2 parts of 4-aminobenzenesulfonic acid, 10-20 parts by mass of 5% sodium hydroxide solution, 0.8-1.6 parts by mass of 12% sodium nitrite aqueous solution, 14-28 parts by mass of 10% hydrochloric acid solution, and 0.5-1 part of sodium dithionite.

[0013] Preferably, the method for preparing sulfonated graphene comprises the following steps: Add graphene oxide to water, stir evenly, adjust the pH to 9-10, perform ultrasonic treatment for 10-15 minutes, add sodium borohydride, react for 30-60 minutes, wash to neutral after the reaction, and dry to obtain partially reduced graphene oxide; Add 4-aminobenzenesulfonic acid to a 5% by mass sodium hydroxide solution and stir to dissolve to obtain a mixed solution of 4-aminobenzenesulfonic acid and sodium hydroxide; add a 12% by mass sodium nitrite aqueous solution, and continue to add a 10% by mass hydrochloric acid solution in an ice water bath to react for 20-40 minutes; at room temperature, add partially reduced graphene oxide to the reaction solution to react for 20-40 minutes, then ultrasonically treat for 10-15 minutes, add sodium dithionite, react in a water bath at 90-98° C. for 1-2 hours, and after the reaction, wash the product with water until it is neutral, and vacuum dry to obtain sulfonated graphene.

[0014] By adopting the above technical scheme, graphene oxide was pre-reduced with sodium borohydride, grafted with diazonium salt of p-aminobenzenesulfonic acid, and secondary reduced with sodium dithionite under ultrasonic-assisted conditions to successfully synthesize sulfonated graphene with excellent dispersibility and strong antistatic properties, thereby significantly enhancing the antistatic properties of POY fiber.

[0015] Preferably, the compound surfactant includes dodecyl-dimethyl-2-phenoxy-ethylammonium bromide and fatty alcohol polyoxyethylene ether, and the weight ratio of the two is 0.8-1.2:1.

[0016] By adopting the above technical scheme, dodecyl-dimethyl-2-phenoxy-ethylammonium bromide is a cationic surfactant with antistatic, soft and other properties, while fatty alcohol polyoxyethylene ether is a nonionic surfactant that can provide good wetting and dispersing effects; using dodecyl-dimethyl-2-phenoxy-ethylammonium bromide and fatty alcohol polyoxyethylene ether as surfactants for the finishing liquid can not only further improve the waterproof performance of sulfonated graphene, but also further enhance the softness, antistatic and hydrophilicity of POY yarn.

[0017] Preferably, the method for preparing the finishing liquid comprises the following steps: The sulfonated graphene is added into water, the mixture is stirred evenly, a compound surfactant is added, the mixture is stirred evenly, and ultrasonic dispersion is performed for 10-18 minutes to obtain a finishing solution.

[0018] Preferably, the POY filament pretreatment comprises the following steps: The POY yarn is immersed in the soap solution, stirred at 60-70°C for 1-2 hours, then washed with water for several times and dried.

[0019] The present application provides a POY yarn, which adopts the following technical solution: A POY yarn produced by the POY yarn production process described in any one of claims 1 to 9.

[0020] In summary, the present application includes at least one of the following beneficial technical effects: 1. Hydrophilic antistatic copolyester is prepared by final polycondensation of oligomers, which improves the hydrophilicity of polyester and thus increases the moisture regain of the fiber, and reduces the volume resistivity to achieve the purpose of antistatic; 2. After the POY blank yarn is prepared, the POY blank yarn is post-finished with sulfonated graphene. The sulfonated graphene has strong waterproof and antistatic properties, which greatly improves the antistatic properties of the POY yarn after finishing. DETAILED DESCRIPTION

[0021] The present application is further described in detail below in conjunction with embodiments.

[0022] Preparation Example Preparation Example 1 Preparation of hydrophilic antistatic copolyester chips Preparation Example 1.1 33.4g of ethylene terephthalate oligomer and 24.8g of ethylene glycol were put into a polymerization kettle, and 2.3g of antimony trioxide was added. When heated to 210°C, stirring was started at a speed of 80rpm. The temperature was raised to 245°C, and 5.6g of nylon 6 and 10.4g of polyethylene glycol were added. After stirring for 15min, low vacuum was applied, and pre-condensation was performed for 30min; high vacuum was applied, and condensation reaction was carried out at 265°C for 2.5h. After the reaction was completed, the hydrophilic antistatic copolyester chips were obtained after discharging, granulation and drying.

[0023] Preparation Example 1.2 Put 50.1g of ethylene terephthalate oligomer and 37.2g of ethylene glycol into a polymerization kettle, add 3.5g of antimony trioxide, heat to 220℃, start stirring, the stirring speed is 90rpm, increase the temperature, when the temperature reaches 255℃, add 8.4g of nylon 6 and 15.6g of polyethylene glycol, stir for 22min, draw a low vacuum, pre-condense for 45min; draw a high vacuum, at 273℃, condense for 3.75h, after the reaction is completed, discharge, granulate and dry to obtain hydrophilic antistatic copolyester chips.

[0024] Preparation Example 1.3 Put 66.8g of ethylene terephthalate oligomer and 59.6g of ethylene glycol into a polymerization kettle, add 4.6g of antimony trioxide, heat to 230℃, start stirring, the stirring speed is 100rpm, increase the temperature, when the temperature reaches 265℃, add 11.2g of nylon 6 and 20.8g of polyethylene glycol, stir for 30min, draw low vacuum, pre-polycondense for 60min; draw high vacuum, carry out polycondensation at 285℃ for 5h, after the reaction is completed, discharge, granulate and dry to obtain hydrophilic antistatic copolyester chips.

[0025] Preparation Example 2 Preparation of sulfonated graphene Preparation Example 2.1 T1. 0.1 g of graphene oxide was added to 100 g of water, stirred evenly, and the pH was adjusted to 9 with a 30% mass fraction of anhydrous sodium carbonate solution, ultrasonically treated at 21 kHz for 10 min, 0.05 g of sodium borohydride was added, and the reaction was continued for 30 min. After the reaction, the mixture was washed with water until neutral, and dried to obtain partially reduced graphene oxide; T2. Add 2.1 g of 4-aminobenzenesulfonic acid into 10 g of 5% sodium hydroxide solution and stir to dissolve to obtain a mixed solution of 4-aminobenzenesulfonic acid and sodium hydroxide; add 0.8 g of 12% sodium nitrite aqueous solution, and continue to add 14 g of 10% hydrochloric acid solution in an ice-water bath to react for 20 minutes; add partially reduced graphene oxide to the reaction solution at room temperature for 20 minutes, then ultrasonically treat at 21 kHz for 10 minutes, add 0.5 g of sodium dithionite, and react in a water bath at 90°C for 2 hours. After the reaction is completed, wash the product with water until it is neutral, and vacuum dry to obtain sulfonated graphene.

[0026] Preparation Example 2.2 T1. 0.2 g of graphene oxide was added to 100 g of water, stirred evenly, and the pH was adjusted to 9.5 with a 30% mass fraction of anhydrous sodium carbonate solution, ultrasonically treated at 21.5 kHz for 13 min, 0.10 g of sodium borohydride was added, and the reaction was continued for 45 min. After the reaction was completed, the mixture was washed with water until neutral, and dried to obtain partially reduced graphene oxide; T2. Add 3.1g of 4-aminobenzenesulfonic acid into 15g of 5% sodium hydroxide solution and stir to dissolve to obtain a mixed solution of 4-aminobenzenesulfonic acid and sodium hydroxide; add 1.2g of 12% sodium nitrite aqueous solution, and continue to add 21g of 10% hydrochloric acid solution in an ice-water bath to react for 30min; add partially reduced graphene oxide to the reaction solution at room temperature for 30min, then ultrasonically treat at 21.5kHz for 13min, add 0.75g of sodium dithionite, and react in a water bath at 94°C for 1.5h. After the reaction is completed, wash the product with water until it is neutral, and vacuum dry to obtain sulfonated graphene.

[0027] Preparation Example 2.3 T1. 0.3 g of graphene oxide was added to 100 g of water, stirred evenly, and the pH was adjusted to 10 with a 30% mass fraction of anhydrous sodium carbonate solution, ultrasonically treated at 22 kHz for 15 min, 0.15 g of sodium borohydride was added, and the reaction was continued for 60 min. After the reaction, the mixture was washed with water until neutral, and dried to obtain partially reduced graphene oxide; T2. Add 4.2 g of 4-aminobenzenesulfonic acid into 20 g of 5% sodium hydroxide solution and stir to dissolve to obtain a mixed solution of 4-aminobenzenesulfonic acid and sodium hydroxide; add 1.6 g of 12% sodium nitrite aqueous solution, and continue to add 28 g of 10% hydrochloric acid solution in an ice-water bath to react for 40 minutes; at room temperature, add partially reduced graphene oxide to the reaction solution and react for 40 minutes, then ultrasonically treat at 22 kHz for 15 minutes, add 1 g of sodium dithionite, and react in a water bath at 98°C for 1 hour. After the reaction is completed, wash the product with water until it is neutral, and vacuum dry to obtain sulfonated graphene.

[0028] Preparation Example 3 Preparation of finishing liquid Preparation Example 3.1 0.02 g of the sulfonated graphene prepared in Preparation Example 2.1 was added to 100 g of water, and the mixture was stirred evenly. 0.4 g of a composite surfactant was added, and the mixture was stirred evenly. The mixture was ultrasonically dispersed at 21 kHz for 10 min to obtain a finishing solution. The composite surfactant used in this preparation example includes dodecyl-dimethyl-2-phenoxy-ethylammonium bromide and fatty alcohol polyoxyethylene ether, with a mass ratio of 0.8:1.

[0029] Preparation Example 3.2 0.03 g of the sulfonated graphene prepared in Preparation Example 2.1 was added to 100 g of water, and the mixture was stirred evenly. 0.5 g of a composite surfactant was added, and the mixture was stirred evenly. The mixture was then ultrasonically dispersed at 21.5 kHz for 13 min to obtain a finishing solution. The composite surfactant used in this preparation example includes dodecyl-dimethyl-2-phenoxy-ethylammonium bromide and fatty alcohol polyoxyethylene ether, with a mass ratio of 0.8:1.

[0030] Preparation Example 3.3 0.04 g of the sulfonated graphene prepared in Preparation Example 2.1 was added to 100 g of water, and the mixture was stirred evenly. 0.6 g of a composite surfactant was added, and the mixture was stirred evenly. The mixture was ultrasonically dispersed at 22 kHz for 10 min to obtain a finishing solution. The composite surfactant used in this preparation example includes dodecyl-dimethyl-2-phenoxy-ethylammonium bromide and fatty alcohol polyoxyethylene ether, with a mass ratio of 0.8:1.

[0031] Preparation Example 3.4 The difference between Preparation Example 3.4 and Preparation Example 3.1 is that the sulfonated graphene used in Preparation Example 3.4 comes from Preparation Example 2.2.

[0032] Preparation Example 3.5 The difference between Preparation Example 3.5 and Preparation Example 3.1 is that the sulfonated graphene used in Preparation Example 3.5 comes from Preparation Example 2.3.

[0033] Preparation Example 3.6 The difference between Preparation Example 3.6 and Preparation Example 3.1 is that the graphene used in Preparation Example 3.6 is ordinary graphene oxide that has not been modified.

[0034] Preparation Example 3.7 The difference between Preparation Example 3.7 and Preparation Example 3.1 is that the mass ratio of the compound surfactant dodecyl-dimethyl-2-phenoxy-ethylammonium bromide and fatty alcohol polyoxyethylene ether used in Preparation Example 3.7 is 1:1.

[0035] Preparation Example 3.8 The difference between Preparation Example 3.8 and Preparation Example 3.1 is that the mass ratio of the compound surfactant dodecyl-dimethyl-2-phenoxy-ethylammonium bromide and fatty alcohol polyoxyethylene ether used in Preparation Example 3.8 is 1.2:1.

[0036] Preparation Example 3.9 The difference between Preparation Example 3.9 and Preparation Example 3.1 is that the mass ratio of the compound surfactant dodecyl-dimethyl-2-phenoxy-ethylammonium bromide and fatty alcohol polyoxyethylene ether used in Preparation Example 3.9 is 0.6:1.

[0037] Preparation Example 3.10 The difference between Preparation Example 3.10 and Preparation Example 3.1 is that the mass ratio of the compound surfactant dodecyl-dimethyl-2-phenoxy-ethylammonium bromide and fatty alcohol polyoxyethylene ether used in Preparation Example 3.10 is 1.4:1. Example

[0038] Example 1 S1. The hydrophilic antistatic copolyester chips prepared in Preparation Example 1.1 were added to a screw extruder and melt-extruded at 270°C to obtain a melt; S2. The melt is filtered through a filter and then pressed into a spinning assembly for spinning. The spinning temperature is 282°C, the spinning assembly pressure is 11MPa, and the filament bundle is subjected to a windless zone, annular air cooling, oiling, pre-networking, drawing, and winding treatment. The windless zone height is 54mm, the annular air temperature is 25°C, and the wind pressure is 50Pa; the pre-networking pressure is 0.08MPa; the speed of the first drafting roller is 2940m / min, the speed of the second drafting roller is 2950m / min, and the winding speed is 2932m / min; and POY blank yarn is obtained; S3. The POY yarn is immersed in a soap solution, stirred at 60°C for 2 hours, then washed with water several times, dried, immersed in the finishing solution obtained in Preparation Example 3.1 for 40 minutes, and dried to obtain POY yarn.

[0039] Example 2 S1. The hydrophilic antistatic copolyester chips prepared in Preparation Example 1.1 were added to a screw extruder and melt-extruded at 280°C to obtain a melt; S2. After the melt is filtered through a filter, it is pressed into a spinning assembly for spinning. The spinning temperature is 285°C, the spinning assembly pressure is 11MPa, and the filament bundle is subjected to a windless zone, annular air cooling, oiling, pre-networking, drawing, and winding treatment. The windless zone height is 55mm, the annular air temperature is 30°C, and the wind pressure is 50Pa; the pre-networking pressure is 0.085MPa; the speed of the first drafting roller is 2980m / min, the speed of the second drafting roller is 3000m / min, and the winding speed is 3000m / min; and the POY blank yarn is obtained; S3. The POY yarn is immersed in a soap solution, stirred at 65°C for 1.5 hours, then washed with water several times, dried, immersed in the finishing solution obtained in Preparation Example 3.1 for 50 minutes, and dried to obtain POY yarn.

[0040] Example 3 S1. The hydrophilic antistatic copolyester chips prepared in Preparation Example 1.1 were added to a screw extruder and melt-extruded at 290°C to obtain a melt; S2. After the melt is filtered through a filter, it is pressed into a spinning assembly for spinning. The spinning temperature is 288°C, the spinning assembly pressure is 11MPa, and the filament bundle is subjected to a windless zone, annular air cooling, oiling, pre-networking, drawing, and winding treatment. The windless zone height is 56mm, the annular air temperature is 35°C, and the wind pressure is 50Pa; the pre-networking pressure is 0.09MPa; the speed of the first drafting roller is 3000m / min, the speed of the second drafting roller is 3100m / min, and the winding speed is 3100m / min; and POY blank yarn is obtained; S3. The POY yarn is immersed in a soap solution, stirred at 70°C for 1 hour, then washed with water several times, dried, immersed in the finishing solution obtained in Preparation Example 3.1 for 60 minutes, and dried to obtain POY yarn.

[0041] Example 4 The difference between Example 4 and Example 1 is that the hydrophilic antistatic copolyester chips used in Example 4 come from Preparation Example 1.2.

[0042] Example 5 The difference between Example 5 and Example 1 is that the hydrophilic antistatic copolyester chips used in Example 5 come from Preparation Example 1.3.

[0043] Example 6 The difference between Example 6 and Example 1 is that the finishing liquid used in Example 6 comes from Preparation Example 3.2.

[0044] Example 7 The difference between Example 7 and Example 1 is that the finishing liquid used in Example 7 comes from Preparation Example 3.3.

[0045] Example 8 The difference between Example 8 and Example 1 is that the finishing liquid used in Example 8 comes from Preparation Example 3.4.

[0046] Example 9 The difference between Example 9 and Example 1 is that the finishing liquid used in Example 9 comes from Preparation Example 3.5.

[0047] Example 10 The difference between Example 10 and Example 1 is that the finishing liquid used in Example 10 comes from Preparation Example 3.6.

[0048] Embodiment 11 The difference between Example 11 and Example 1 is that the finishing liquid used in Example 11 comes from Preparation Example 3.7.

[0049] Example 12 The difference between Example 12 and Example 1 is that the finishing liquid used in Example 12 comes from Preparation Example 3.8.

[0050] Embodiment 13 The difference between Example 13 and Example 1 is that the finishing liquid used in Example 13 comes from Preparation Example 3.9.

[0051] Embodiment 14 The difference between Example 14 and Example 1 is that the finishing liquid used in Example 14 comes from Preparation Example 3.10.

[0052] Performance testing 1. After the POY silk obtained in Examples 1-14 was spun into fabrics, the charge surface density (μC / m) of the clothing fabrics was measured using a LFY-403 fabric friction charge tester according to the charge surface density method in GB / T12703.1-2008 "Evaluation of electrostatic properties of textiles". 2 ), the results are shown in Table 1; 2. The POY yarn obtained in Examples 1-14 was passed through the YG023B fully automatic single-filament strength tester produced by Changzhou Textile Instrument Factory, and 12 stations of the wire tube were selected to test the elongation at break of the POY yarn (%). The results are shown in Table 1. The specific test results are as follows: Table 1 Performance test results It can be seen from the test results in Table 1 that the charge surface density of the POY yarn provided by the present application is lower than the standard requirement, indicating that it has strong antistatic ability; and the elongation at break is large, indicating that it has strong spinnability.

[0053] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed. However, as long as it is within the scope of the claims of the present application, it shall be protected by the patent law.

Claims

1. A production process for POY yarn, characterized in that: The following steps are involved: S1. The hydrophilic antistatic copolyester chips are added to a screw extruder for melt extrusion to obtain a melt; S2. The melt is filtered through a filter and then pressed into a spinning assembly for spinning. The tow is subjected to a windless zone, annular air cooling, oiling, pre-networking, drawing, and winding to obtain a POY blank yarn; S3. After the POY yarn is pretreated, it is immersed in a finishing solution and dried to obtain a POY yarn; The raw materials of the post-finishing liquid include, by weight: 0.02-0.04 parts of sulfonated graphene, 0.4-0.6 parts of a compound surfactant, and 100 parts of water.

2. A POY yarn production process according to claim 1, characterized in that: The hydrophilic antistatic copolyester chips are prepared from the following raw materials in parts by weight: 33.4-66.8 parts of ethylene terephthalate oligomer, 24.8-59.6 parts of ethylene glycol, 2.3-4.6 parts of catalyst, 5.6-11.2 parts of nylon 6, and 10.4-20.8 parts of polyethylene glycol.

3. A POY yarn production process according to claim 2, characterized in that: The catalyst is antimony trioxide.

4. A POY yarn production process according to claim 2, characterized in that: The preparation method of the hydrophilic antistatic copolyester slice comprises the following steps: Put ethylene terephthalate oligomer and ethylene glycol into a polymerization kettle, add a catalyst, heat to 210-230°C, start stirring, and the stirring speed is 80-100rpm. Raise the temperature. When the temperature reaches 245-265°C, add nylon 6 and polyethylene glycol. After stirring for 15-30 minutes, draw a low vacuum, and pre-polycondense for 30-60 minutes; draw a high vacuum, and carry out polycondensation at 265-280°C for 2.5-5 hours. After the reaction is completed, discharge, granulate and dry to obtain hydrophilic antistatic copolyester chips.

5. The production process of POY yarn according to claim 1, characterized in that: The sulfonated graphene is prepared from the following raw materials in parts by weight: 100 parts of water, 0.1-0.3 parts of graphene oxide, 0.05-0.15 parts of sodium borohydride, 2.1-4.2 parts of 4-aminobenzenesulfonic acid, 10-20 parts of 5% by mass sodium hydroxide solution, 0.8-1.6 parts of 12% by mass sodium nitrite aqueous solution, 14-28 parts of 10% by mass hydrochloric acid solution, and 0.5-1 part of sodium dithionite.

6. A POY yarn production process according to claim 5, characterized in that: The method for preparing sulfonated graphene comprises the following steps: Add graphene oxide to water, stir evenly, adjust the pH to 9-10, perform ultrasonic treatment for 10-15 minutes, add sodium borohydride, react for 30-60 minutes, wash to neutral after the reaction, and dry to obtain partially reduced graphene oxide; Add 4-aminobenzenesulfonic acid to a 5% by mass sodium hydroxide solution and stir to dissolve to obtain a mixed solution of 4-aminobenzenesulfonic acid and sodium hydroxide; add a 12% by mass sodium nitrite aqueous solution, and continue to add a 10% by mass hydrochloric acid solution in an ice water bath to react for 20-40 minutes; at room temperature, add partially reduced graphene oxide to the reaction solution to react for 20-40 minutes, then ultrasonically treat for 10-15 minutes, add sodium dithionite, and react in a water bath at 90-98°C for 1-2 hours. After the reaction is completed, wash the product with water until it is neutral, and vacuum dry to obtain sulfonated graphene.

7. The production process of POY yarn according to claim 1, characterized in that: The compound surfactant comprises dodecyl-dimethyl-2-phenoxy-ethylammonium bromide and fatty alcohol polyoxyethylene ether, and the weight ratio of the two is 0.8-1.2:

1.

8. The production process of POY yarn according to claim 1, characterized in that: The preparation method of the finishing liquid comprises the following steps: The sulfonated graphene is added into water, the mixture is stirred evenly, a compound surfactant is added, the mixture is stirred evenly, and ultrasonic dispersion is performed for 10-18 minutes to obtain a finishing solution.

9. A POY yarn production process according to claim 1, characterized in that: The POY blank wire pretreatment comprises the following steps: The POY yarn is immersed in the soap solution, stirred at 60-70°C for 1-2 hours, then washed with water for several times and dried.

10. A POY yarn produced by the POY yarn production process according to any one of claims 1 to 9.

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