Preparation method of wear-resistant POY (polyester pre-oriented yarn)

Abstract

The invention belongs to the technical field of polyester, and particularly relates to a preparation method of wear-resistant POY (polyester pre-oriented yarn) polyester yarn, which comprises the following steps: modifying expanded vermiculite by using trimethylchlorosilane to form alkyl modified expanded vermiculite, then mixing with polyethylene glycol terephthalate, color master batch, an antioxidant, a smoothing agent and a dispersing agent, carrying out melt extrusion and spinning to obtain POY precursor yarn, and carrying out melt spinning on the POY precursor yarn to obtain the wear-resistant POY polyester yarn. And finally, carrying out circular blowing, bundling and oiling on the POY precursor to obtain the wear-resistant POY polyester yarn. According to the invention, the wear-resistant defect of the existing POY polyester yarn is overcome, the porosity of the expanded vermiculite and the permeability of the polyethylene glycol terephthalate are utilized, the connection stability of the expanded vermiculite is improved, and the self wear-resistant characteristic of the polyester yarn is effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of polyester, and particularly relates to a preparation method of wear-resistant POY polyester filaments. Background Art

[0002] POY, also known as polyester pre-oriented yarn, is a polyester semi-finished product obtained by a high-speed spinning process. This POY polyester filament is made of polyethylene terephthalate (PET) as the raw material and is an incompletely drawn chemical fiber filament with an orientation degree between that of undrawn yarn and drawn yarn obtained by high-speed spinning. The POY polyester filament is only a polyester semi-finished product and is not directly used for weaving, but needs to be further processed, such as being made into polyester DTY after being drawn and deformed by a texturing machine. However, during the process of processing POY into DTY, POY needs to undergo high-speed shearing, forming a large amount of friction, which leads to a decrease in the yield rate of DTY. Summary of the Invention

[0003] Aiming at the problems in the prior art, the present invention provides a preparation method of wear-resistant POY polyester filaments, which solves the wear resistance defect of the existing POY polyester filaments. By utilizing the porosity of expanded vermiculite and the permeability of polyethylene terephthalate, not only the connection stability of expanded vermiculite is improved, but also the self-wear resistance characteristics of the polyester filaments are effectively enhanced.

[0004] To achieve the above technical objectives, the technical solution of the present invention is as follows:

[0005] A preparation method of wear-resistant POY polyester filaments includes the following steps:

[0006] Step 1, put expanded vermiculite into ethanol for grinding treatment, and obtain refined expanded vermiculite after drying. The mass ratio of the expanded vermiculite to ethanol is 3 - 5:1. The temperature of the grinding treatment is 30 - 50 °C, and the pressure is 0.5 - 0.7 MPa; the temperature of the drying is 130 - 140 °C, and the time is 3 - 5 h; this step utilizes the insolubility of expanded vermiculite and ethanol, and cooperates with normal-temperature grinding treatment to make the expanded vermiculite particles finer, and obtain homogeneous and fine expanded vermiculite particles;

[0007] Step 2: Add trimethylchlorosilane to diethyl ether and stir evenly. Then add expanded vermiculite and stir evenly for 20 - 30 min. After filtration, dry it to obtain adsorbed expanded vermiculite. Then let the expanded vermiculite stand for 1 - 2 h and dry it to obtain hydrophobic expanded vermiculite. The concentration of trimethylchlorosilane in diethyl ether is 100 - 200 g / L, the stirring speed for even stirring is 300 - 500 r / min, the concentration of expanded vermiculite in diethyl ether is 400 - 500 g / L, the drying temperature is 20 - 30 °C, the standing atmosphere is a mixed atmosphere of nitrogen and water vapor, and the volume ratio of nitrogen to water vapor is 10:1. The drying is carried out by double-gradient drying. The temperature of the first gradient is 80 - 90 °C and the time is 20 - 30 min. The temperature of the second gradient is 130 - 140 °C and the time is 1 - 2 h. In this step, trimethylchlorosilane has good solubility in diethyl ether. During the process of adding and stirring expanded vermiculite, the hydroxyl, carboxyl, and phenolic functional groups in expanded vermiculite show good adsorption properties and adsorb trimethylchlorosilane on the surface. During the drying process, diethyl ether directly separates from the surface of expanded vermiculite and adsorbs and fixes trimethylchlorosilane in situ. The standing atmosphere uses a mixed atmosphere of nitrogen and water vapor. The water vapor in the atmosphere can directly react with trimethylchlorosilane to form trimethylhydroxysilane, that is, trimethylchlorosilane is converted into trimethylsilanol. At this time, the adsorption groups of expanded vermiculite are hydroxyl, carboxyl, or phenolic functional groups, and its essence is hydroxyl. Therefore, during the subsequent drying process, the hydroxyl group on expanded vermiculite undergoes a polycondensation reaction with trimethylsilanol, completely removing the hydroxyl groups of hydroxyl, carboxyl, and phenolic functional groups and converting them into silicon methyl groups, thus showing hydrophobicity.

[0008] Step 3: Constantly dry polyethylene terephthalate and hydrophobic expanded vermiculite. Then add polyethylene terephthalate, hydrophobic expanded vermiculite, masterbatch, antioxidant, lubricant, and dispersant to a blender and stir evenly, and grind to obtain a mixture. The temperature for constant drying is 120 - 140 °C and the drying time is 1 - 2 h. The mass ratio of the mixture is: 100 parts of polyethylene terephthalate, 9 - 12 parts of hydrophobic expanded vermiculite, 12 - 14 parts of masterbatch, 0.8 - 1.2 parts of antioxidant, 1 - 2 parts of lubricant, and 1 - 2 parts of dispersant. The masterbatch uses one of magenta masterbatch, cyan masterbatch, and yellow masterbatch. The antioxidant uses tetrakis(2,4-di-tert-butylphenyl)-4,4'-biphenylyl diphosphite or bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite. The lubricant uses white oil. The dispersant uses one of oleic acid amide, calcium stearate, or zinc stearate. The stirring speed for even stirring is 300 - 600 r / min. This step utilizes the stability of polyethylene terephthalate and hydrophobic expanded vermiculite itself, uses temperature to quickly remove the remaining moisture, and then completely mixes the raw materials during the stirring process.

[0009] Step 4: Put the mixture into a single-screw extruder for melt extrusion, and then filter the extruded mixture to obtain a prefabricated melt. The temperature of the melt extrusion is 270 - 280 °C, the pre-pressure of the filtration is 10 MPa, and the post-pressure is 5 MPa.

[0010] Step 5: Feed the mixed melt into a spinning box and obtain POY raw filaments through high-speed spinning. The spinning speed is 3000 - 4000 r / min, and the temperature is 280 - 290 °C.

[0011] Step 6: Carry out ring blowing on the POY raw filaments, and then bundle and oil them to obtain wear-resistant POY polyester filaments. The temperature of the ring blowing is 20 - 25 °C, the wind speed is 0.5 - 0.8 m / s. The oiling is to soak the fibers in an oil agent, and the mass ratio of the oil agent is: 20 - 25 parts of castor oil polyoxyethylene ester, 25 - 30 parts of lauryl alcohol, 47 - 55 parts of aminopropyl kojic acid phosphate, and 14 - 15 parts of silicone oil.

[0012] As can be seen from the above description, the present invention has the following advantages:

[0013] 1. The present invention solves the wear resistance defect of existing POY polyester filaments. By utilizing the porosity of expanded vermiculite and the permeability of polyethylene terephthalate, it not only improves the connection stability of expanded vermiculite, but also effectively enhances the self-wear resistance characteristics of polyester filaments.

[0014] 2. The present invention utilizes the adsorption property of expanded vermiculite and combines it with the hydrolysis reaction of trimethylchlorosilane to occupy and transform the hydrophilic hydroxyl structure in expanded vermiculite into alkyl groups, achieving hydrophobic modification, and at the same time solving the water absorption problem of expanded vermiculite.

[0015] 3. The alkyl groups on the hydrophobically modified expanded vermiculite in the present invention increase the adsorption of the oil agent by the POY raw filaments, thereby improving the smoothness of the POY polyester filaments and reducing the friction on the surface of the POY polyester filaments. Specific Embodiments

[0016] The present invention will be described in detail in combination with embodiments, but no limitations will be made to the claims of the present invention.

[0017] Example 1

[0018] A preparation method of wear-resistant POY polyester filaments includes the following steps:

[0019] Step 1: Put expanded vermiculite into ethanol for grinding treatment, and obtain refined expanded vermiculite after drying. The mass ratio of the expanded vermiculite to ethanol is 3:1. The temperature of the grinding treatment is 40 °C, and the pressure is 0.6 MPa; the temperature of the drying is 135 °C, and the time is 4 h.

[0020] Step 2: Add trimethylchlorosilane to diethyl ether and stir evenly. Then add expanded vermiculite and stir evenly for 25 min. After filtration, dry it to obtain the adsorbed expanded vermiculite. Then let the expanded vermiculite stand for 2 h and dry it to obtain hydrophobic expanded vermiculite. The concentration of trimethylchlorosilane in diethyl ether is 100 g / L, the stirring speed for even stirring is 400 r / min, the concentration of expanded vermiculite in diethyl ether is 400 g / L, the drying temperature is 25 °C, the atmosphere for standing is a mixed atmosphere of nitrogen and water vapor, and the volume ratio of nitrogen to water vapor is 10:1. The drying is carried out by double-gradient drying. The temperature of the first gradient is 85 °C and the time is 25 min. The temperature of the second gradient is 135 °C and the time is 2 h;

[0021] Step 3: Dry poly(ethylene terephthalate) and hydrophobic expanded vermiculite at a constant temperature. Then add poly(ethylene terephthalate), hydrophobic expanded vermiculite, color masterbatch, antioxidant, smoothing agent, and dispersant into a blender and stir evenly, and grind to obtain a mixture; The temperature for constant-temperature drying is 130 °C and the drying time is 2 h; The mass ratio of the mixture is: 100 parts of poly(ethylene terephthalate), 9 parts of hydrophobic expanded vermiculite, 12 parts of color masterbatch, 0.8 part of antioxidant, 1 part of smoothing agent, and 1 part of dispersant; The color masterbatch uses magenta masterbatch; The antioxidant uses tetra(2,4-di-tert-butylphenyl-4,4'-biphenyl) bis(phosphite)); The smoothing agent uses white oil; The dispersant uses oleic acid amide; The stirring speed for even stirring is 500 r / min;

[0022] Step 4: Put the mixture into a single-screw extruder for melt extrusion, and then filter the extruded mixture to obtain a prefabricated melt. The temperature for melt extrusion is 270 - 280 °C, the front pressure for filtration is 10 MPa, and the back pressure is 5 MPa;

[0023] Step 5: Feed the mixed melt into a spinning box and obtain POY raw filaments by high-speed spinning. The spinning speed is 3500 r / min and the temperature is 280 - 290 °C;

[0024] Step 6: Carry out ring blowing on the POY raw filaments, and then bundle and oil them to obtain wear-resistant POY polyester filaments. The temperature for ring blowing is 23 °C and the wind speed is 0.7 m / s. The oiling is to soak the fibers in an oil agent. The mass ratio of the oil agent is: 20 parts of castor oil polyoxyethylene ester, 25 parts of lauryl alcohol, 47 parts of aminopropyl kojic acid phosphate, and 14 parts of silicone oil.

[0025] Example 2

[0026] A preparation method of wear-resistant POY polyester filaments, comprising the following steps:

[0027] Step 1: Put expanded vermiculite into ethanol for grinding treatment, and obtain refined expanded vermiculite after drying. The mass ratio of the expanded vermiculite to ethanol is 5:1. The temperature of the grinding treatment is 30°C, and the pressure is 0.5 MPa. The temperature of the drying is 130°C, and the time is 3 h.

[0028] Step 2: Add trimethylchlorosilane to ether and stir evenly, then add expanded vermiculite and stir evenly for 20 min. After filtration and air drying, obtain adsorbed expanded vermiculite. Then let the expanded vermiculite stand for 1 h and dry to obtain hydrophobic expanded vermiculite. The concentration of trimethylchlorosilane in ether is 200 g / L, and the stirring speed for even stirring is 300 r / min. The concentration of expanded vermiculite in ether is 500 g / L. The temperature of the air drying is 20°C. The atmosphere for standing is a mixed atmosphere of nitrogen and water vapor, and the volume ratio of nitrogen to water vapor is 10:1. The drying adopts double-gradient drying. The temperature of the first gradient is 80°C, and the time is 20 min. The temperature of the second gradient is 130°C, and the time is 1 h.

[0029] Step 3: Constantly dry polyethylene terephthalate and hydrophobic expanded vermiculite. Then add polyethylene terephthalate, hydrophobic expanded vermiculite, masterbatch, antioxidant, smoothing agent, and dispersant into a blender and stir evenly, and grind to obtain a mixture. The temperature of the constant drying is 120°C, and the drying time is 1 h. The mass ratio of the mixture is as follows: 100 parts of polyethylene terephthalate, 12 parts of hydrophobic expanded vermiculite, 14 parts of masterbatch, 1.2 parts of antioxidant, 2 parts of smoothing agent, and 2 parts of dispersant. The masterbatch uses a cyan masterbatch. The antioxidant uses bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite. The smoothing agent uses white oil. The dispersant uses calcium stearate. The stirring speed for even stirring is 300 r / min.

[0030] Step 4: Put the mixture into a single-screw extruder for melt extrusion, and then filter the extruded mixture to obtain a prefabricated melt. The temperature of the melt extrusion is 270 - 280°C. The pre-pressure for filtration is 10 MPa, and the post-pressure is 5 MPa.

[0031] Step 5: Feed the mixed melt into a spinning box and obtain POY raw filaments through high-speed spinning. The spinning speed is 3000 r / min, and the temperature is 280 - 290°C.

[0032] Step 6: Carry out ring blowing on the POY raw filaments, and then through bunching and oiling, obtain wear-resistant POY polyester filaments. The temperature of the ring blowing is 20°C, and the wind speed is 0.5 m / s. The oiling is to soak the fibers into an oil agent. The mass ratio of the oil agent is as follows: 25 parts of castor oil polyoxyethylene ester, 30 parts of lauryl alcohol, 55 parts of aminopropyl kojic acid phosphate, and 15 parts of silicone oil.

[0033] Example 3

[0034] A preparation method of wear-resistant POY polyester filament, comprising the following steps:

[0035] Step 1, putting expanded vermiculite into ethanol for grinding treatment, and obtaining refined expanded vermiculite after drying. The mass ratio of the expanded vermiculite to ethanol is 4:1. The temperature of the grinding treatment is 50 °C, and the pressure is 0.7 MPa; the temperature of the drying is 140 °C, and the time is 5 h;

[0036] Step 2, adding trimethylchlorosilane to ether and stirring evenly, then adding expanded vermiculite and stirring evenly for 30 min. After filtration and drying, adsorbed expanded vermiculite is obtained. Then the expanded vermiculite is left standing for 2 h and dried to obtain hydrophobic expanded vermiculite. The concentration of trimethylchlorosilane in ether is 150 g / L, and the stirring speed for stirring evenly is 500 r / min. The concentration of expanded vermiculite in ether is 450 g / L. The temperature of the drying is 30 °C. The atmosphere of the standing is a mixed atmosphere of nitrogen and water vapor, and the volume ratio of nitrogen to water vapor is 10:1. The drying adopts double-gradient drying. The temperature of the first gradient is 90 °C, and the time is 30 min. The temperature of the second gradient is 140 °C, and the time is 2 h;

[0037] Step 3, drying polyethylene terephthalate and hydrophobic expanded vermiculite at a constant temperature, then adding polyethylene terephthalate, hydrophobic expanded vermiculite, masterbatch, antioxidant, lubricant, and dispersant into a blender and stirring evenly, and grinding to obtain a mixture; the temperature of the constant-temperature drying is 140 °C, and the drying time is 2 h; the mass ratio of the mixture is: 100 parts of polyethylene terephthalate, 11 parts of hydrophobic expanded vermiculite, 13 parts of masterbatch, 1.1 parts of antioxidant, 1.5 parts of lubricant, and 1.5 parts of dispersant; the masterbatch uses a yellow masterbatch; the antioxidant uses tetra(2,4-di-tert-butylphenyl-4,4'-biphenyl) bisphosphite); the lubricant uses white oil; the dispersant uses zinc stearate; the stirring speed for stirring evenly is 600 r / min;

[0038] Step 4, putting the mixture into a single-screw extruder for melt extrusion, and then filtering the extruded mixture to obtain a prefabricated melt. The temperature of the melt extrusion is 270-280 °C, the front pressure of the filtration is 10 MPa, and the back pressure is 5 MPa;

[0039] Step 5, putting the mixed melt into a spinning box and obtaining POY raw filaments through high-speed spinning. The spinning speed is 4000 r / min, and the temperature is 280-290 °C;

[0040] Step 6, subject the POY raw filament to ring blowing, then bundle it and apply oil, to obtain wear-resistant POY polyester filament. The temperature of the ring blowing is 25°C and the wind speed is 0.8 m / s. The oil application is to immerse the fiber in an oil agent, and the mass ratio of the oil agent is: 23 parts of castor oil polyoxyethylene ester, 28 parts of lauryl alcohol, 52 parts of aminopropyl kojic acid phosphate, and 15 parts of silicone oil.

[0041] Comparative Example 1

[0042] A preparation method of wear-resistant POY polyester filament, comprising the following steps:

[0043] Step 1, dry poly(ethylene terephthalate) and calcium carbonate at a constant temperature, then add poly(ethylene terephthalate), calcium carbonate, color masterbatch, antioxidant, smoothing agent, and dispersant to a blender and stir evenly, and grind to obtain a mixture. The temperature of the constant-temperature drying is 140°C and the drying time is 2 h. The mass ratio of the mixture is: 100 parts of poly(ethylene terephthalate), 11 parts of calcium carbonate, 13 parts of color masterbatch, 1.1 parts of antioxidant, 1.5 parts of smoothing agent, and 1.5 parts of dispersant. The color masterbatch uses a yellow color masterbatch. The antioxidant uses tetra(2,4-di-tert-butylphenyl-4,4'-biphenyl) bis(phosphite). The smoothing agent uses white oil. The dispersant uses zinc stearate. The stirring speed is 600 r / min.

[0044] Step 2, put the mixture into a single-screw extruder for melt extrusion, and then filter the extruded mixture to obtain a prefabricated melt. The temperature of the melt extrusion is 270 - 280°C, the front pressure of the filtration is 10 MPa, and the back pressure is 5 MPa.

[0045] Step 3, feed the mixed melt into a spinning box and obtain POY raw filament through high-speed spinning. The spinning speed is 4000 r / min and the temperature is 280 - 290°C.

[0046] Step 4, subject the POY raw filament to ring blowing, then bundle it and apply oil, to obtain wear-resistant POY polyester filament. The temperature of the ring blowing is 25°C and the wind speed is 0.8 m / s. The oil application is to immerse the fiber in an oil agent, and the mass ratio of the oil agent is: 23 parts of castor oil polyoxyethylene ester, 28 parts of lauryl alcohol, 52 parts of aminopropyl kojic acid phosphate, and 15 parts of silicone oil.

[0047] Comparative Example 2

[0048] A preparation method of wear-resistant POY polyester filament, comprising the following steps:

[0049] Step 1: Put expanded vermiculite into ethanol for grinding treatment, and obtain refined expanded vermiculite after drying. The mass ratio of the expanded vermiculite to ethanol is 4:1. The temperature of the grinding treatment is 50°C, and the pressure is 0.7 MPa. The temperature of the drying is 140°C, and the time is 5 h.

[0050] Step 2: Constantly dry polyethylene terephthalate and refined expanded vermiculite. Then, add polyethylene terephthalate, hydrophobic expanded vermiculite, masterbatch, antioxidant, smoothing agent, and dispersant into a blender and stir evenly, and then grind to obtain a mixture. The temperature of the constant drying is 140°C, and the drying time is 2 h. The mass ratio of the mixture is: 100 parts of polyethylene terephthalate, 11 parts of hydrophobic expanded vermiculite, 13 parts of masterbatch, 1.1 parts of antioxidant, 1.5 parts of smoothing agent, and 1.5 parts of dispersant. The masterbatch uses yellow masterbatch. The antioxidant uses bis[2,4-bis(1,1-dimethylethyl)phenyl]pentaerythritol diphosphite. The smoothing agent uses white oil. The dispersant uses zinc stearate. The stirring speed is 600 r / min.

[0051] Step 3: Put the mixture into a single-screw extruder for melt extrusion, and then filter the extruded mixture to obtain a prefabricated melt. The temperature of the melt extrusion is 270 - 280°C. The front pressure of the filtration is 10 MPa, and the back pressure is 5 MPa.

[0052] Step 4: Feed the mixed melt into a spinning box and obtain POY raw filaments through high-speed spinning. The spinning speed is 4000 r / min, and the temperature is 280 - 290°C.

[0053] Step 5: Carry out ring blowing on the POY raw filaments, and then bundle and oil them to obtain wear-resistant POY polyester filaments. The temperature of the ring blowing is 25°C, and the wind speed is 0.8 m / s. The oiling is to soak the fibers in an oil agent. The mass ratio of the oil agent is: 23 parts of castor oil polyoxyethylene ester, 28 parts of lauryl alcohol, 52 parts of aminopropyl kojic acid phosphate, and 15 parts of silicone oil.

[0054] Use the POY polyester filaments of Examples 1 - 3 and Comparative Examples 1 - 2 as test samples for performance testing, and the results are as follows:

[0055] Place the above test samples in a constant temperature and humidity box and let them stand for 8 h, then take them out and observe. Among them, the POY polyester filaments of Examples 1 - 3 and Comparative Example 1 did not change, and there were no stains on the surface. The surface of Comparative Example 2 was significantly wet. This phenomenon shows that the hydrophobic modification of expanded vermiculite can effectively solve the hygroscopicity problem of POY polyester filaments containing expanded vermiculite.

[0056] Carry out wear resistance testing on the POY polyester filaments of Examples 1 - 3 and Comparative Examples 1 - 2, and the dynamic friction coefficients are as follows:

[0057] Coefficient of kinetic friction Hydrophilicity / hydrophobicity Example 1 0.25 Hydrophobic Example 2 0.23 Hydrophobic Example 3 0.24 Hydrophobic Comparative Example 1 0.29 Hydrophobic Comparative Example 2 0.27 Hydrophilic

[0058] From the above comparison data, the comparison between Comparative Example 1 and Comparative Example 2 illustrates the difference between expanded vermiculite and calcium carbonate. Expanded vermiculite itself has a certain adsorption property and also has alkyl groups, which can effectively improve the adsorption property of the oil agent, reduce the friction performance, and improve the wear resistance of polyester. At the same time, the comparison between Examples 1-3 and Comparative Example 2 shows that expanded vermiculite with trimethylchlorosilane as the hydrophobization modifier can use the methyl groups of trimethylchlorosilane to increase the alkyl content, improve the oiling rate, and thus improve the wear resistance of polyester filaments. At the same time, the hydrophilic-hydrophobic experiments of Examples 1-3 and Comparative Examples 1-2 show that the direct addition of expanded vermiculite has a certain hydrophilicity, which affects the actual use of polyester filaments.

[0059] It can be understood that the above specific description of the present invention is only for explaining the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those of ordinary skill in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as it meets the use requirements, it is within the protection scope of the present invention.

Claims

1. A preparation method of wear-resistant POY polyester filaments, characterized in that: It includes the following steps: Step 1: Put expanded vermiculite into ethanol for grinding treatment, and obtain refined expanded vermiculite after drying. Step 2: Add trimethylchlorosilane to ether and stir evenly, then add expanded vermiculite and stir evenly for 20 - 30 min. After filtration and air drying, obtain adsorbed expanded vermiculite. Then let the expanded vermiculite stand for 1 - 2 h and dry to obtain hydrophobic expanded vermiculite. Step 3: Dry polyethylene terephthalate and hydrophobic expanded vermiculite at a constant temperature. Then add polyethylene terephthalate, hydrophobic expanded vermiculite, color masterbatch, antioxidant, smoothing agent, and dispersant into a blender and stir evenly, and grind to obtain a mixture. Step 4: Put the mixture into a single - screw extruder for melt extrusion, and then filter the extruded mixture to obtain a pre - formed melt. Step 5: Feed the mixed melt into a spinning box and obtain POY raw filaments through high - speed spinning. Step 6: Carry out ring blowing on the POY raw filaments, and then through bundling and oiling, obtain wear - resistant POY polyester filaments.

2. The preparation method of the wear-resistant POY polyester filament according to claim 1, characterized in that: In Step 1, the mass ratio of expanded vermiculite to ethanol is 3 - 5:1, the temperature of the grinding treatment is 30 - 50 °C, and the pressure is 0.5 - 0.7 MPa; the temperature of the drying is 130 - 140 °C, and the time is 3 - 5 h.

3. The preparation method of the wear-resistant POY polyester filament according to claim 1, characterized in that: In Step 2, the concentration of trimethylchlorosilane in ether is 100 - 200 g / L, the stirring speed for even stirring is 300 - 500 r / min, the concentration of expanded vermiculite in ether is 400 - 500 g / L, and the temperature of the air drying is 20 - 30 °C.

4. The preparation method of the wear-resistant POY polyester filament according to claim 1, characterized in that: In Step 2, the atmosphere for standing is a mixed atmosphere of nitrogen and water vapor, and the volume ratio of nitrogen to water vapor is 10:

1. The drying adopts double - gradient drying. The temperature of the first gradient is 80 - 90 °C, and the time is 20 - 30 min. The temperature of the second gradient is 130 - 140 °C, and the time is 1 - 2 h.

5. The preparation method of the wear-resistant POY polyester filament according to claim 1, characterized in that: In Step 3, the temperature for constant - temperature drying is 120 - 140 °C, and the drying time is 1 - 2 h; the mass ratio of the mixture is: 100 parts of polyethylene terephthalate, 9 - 12 parts of hydrophobic expanded vermiculite, 12 - 14 parts of color masterbatch, 0.8 - 1.2 parts of antioxidant, 1 - 2 parts of smoothing agent, and 1 - 2 parts of dispersant; the stirring speed for even stirring is 300 - 600 r / min.

6. The preparation method of the wear-resistant POY polyester filament according to claim 5, characterized in that: The color masterbatch adopts one of magenta masterbatch, cyan masterbatch, and yellow masterbatch; the antioxidant adopts tetra (2,4 - di - tert - butylphenyl - 4,4’ - biphenyl) bisphosphite) or bis (2,4 - di - tert - butylphenyl) pentaerythritol diphosphite; the smoothing agent adopts white oil; the dispersant adopts one of oleic acid amide, calcium stearate, or zinc stearate.

7. The preparation method of the wear-resistant POY polyester filament according to claim 1, wherein: In Step 4, the temperature of the melt extrusion is 270 - 280 °C, the pre - pressure for filtration is 10 MPa, and the post - pressure is 5 MPa.

8. The preparation method of the wear-resistant POY polyester filament according to claim 1, characterized in that: In Step 5, the spinning speed is 3000 - 4000 r / min, and the temperature is 280 - 290 °C.

9. The preparation method of the wear-resistant POY polyester filament according to claim 1, characterized in that: In Step 6, the temperature of the ring blowing is 20 - 25 °C, and the wind speed is 0.5 - 0.8 m / s.

10. The preparation method of the wear-resistant POY polyester filament according to claim 1, characterized in that: The oiling in Step 6 is to soak the fibers in an oil agent, and the mass ratio of the oil agent is as follows: 20 - 25 parts of castor oil polyoxyethylene ester, 25 - 30 parts of lauryl alcohol, 47 - 55 parts of aminopropyl kojic acid phosphate, and 14 - 15 parts of silicone oil.