High-strength rope based on polyester fiber composite material and manufacturing method thereof

Abstract

The invention relates to the technical field of polyester fibers, in particular to a high-strength rope based on a polyester fiber composite material and a manufacturing method thereof.The high-strength rope is prepared from, by weight, 60-80 parts of master batch A, 20-30 parts of master batch B, 20-30 parts of master batch C, 3-5 parts of isophthalic acid, 0.02-0.05 part of tetrabutyl titanate and 0.02-0.05 part of triphenyl phosphate. According to the invention, the filler of the master batch B forms a flexible interface layer by using maleic anhydride grafted POE, acrylate rubber powder and the like, the elasticity and dispersity of the filler are further enhanced by using ethylene propylene diene monomer powder and the like in the added materials, and meanwhile, a mixture of the master batch C adopts KH550 coupling agent modified nano silicon dioxide, so that an efficient stress transfer network is constructed; therefore, the problem of low stress transmission efficiency caused by poor interfacial compatibility is solved, and the tensile strength of the polyester fiber composite material is fundamentally improved.

Description

Technical Field

[0001] This invention relates to the field of polyester fiber technology, specifically to a high-strength rope based on polyester fiber composite materials and its manufacturing method. Background Technology

[0002] Polyester fiber composites are polymer materials typically produced through melt blending, spinning, and post-processing. These materials possess excellent properties such as high strength, wear resistance, and chemical corrosion resistance, and are widely used in textiles, industrial ropes, canvas, conveyor belts, and other fields. By adding various modifying agents and optimizing processing techniques, their mechanical properties and applicability can be further improved, making it an important development direction for current synthetic fiber materials.

[0003] Currently, in the development of polyester fiber composite materials, functional fillers are often introduced to improve specific properties. However, poor interfacial compatibility between the filler and the polyester matrix leads to uneven dispersion of the filler within the matrix. This uneven dispersion hinders the effective transfer of stress from the relatively flexible matrix to the rigid filler, limiting the full realization of the composite material's tensile strength. Therefore, this invention provides a high-strength rope based on polyester fiber composite materials and its manufacturing method. Summary of the Invention

[0004] The purpose of this invention is to provide a high-strength rope based on polyester fiber composite material and its manufacturing method. The high-strength rope based on polyester fiber composite material prepared by this invention not only has good strength properties, but also good aging resistance properties.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a polyester fiber composite material, comprising the following raw materials in parts by weight: 60-80 parts of masterbatch A, 20-30 parts of masterbatch B, 20-30 parts of masterbatch C, 3-5 parts of isophthalic acid, 0.02-0.05 parts of tetrabutyl titanate and 0.02-0.05 parts of triphenyl phosphate; The raw materials for Master A, Master B, and Master C are all polyethylene terephthalate (PET) chips. The PET chips are dried before use. Master B and Master C are prepared by further processing the dried PET chips.

[0006] Preferably, the drying method for polyethylene terephthalate (PET) chips is as follows: vacuum drying at 120–140°C for 4–6 hours to complete the drying process of PET chips.

[0007] Preferably, the preparation method of the masterbatch B is as follows: polyethylene terephthalate chips, fillers and Fischer-Tropsch wax are added to a mixer and stirred at 60-100 rpm for 20-30 minutes. The resulting product is fed into a twin-screw extruder and the temperature range is set to 230-250°C. After melt blending, the product is granulated to a particle size of 1-2 mm to obtain masterbatch B.

[0008] Preferably, the mass ratio of polyethylene terephthalate chips, filler, and Fischer-Tropsch wax is 100:25-35:2-3.

[0009] Preferably, the filler is prepared by the following method: maleic anhydride-grafted POE, acrylate rubber powder, and maleic anhydride-grafted PP wax are fed into a mixer and stirred at 200-400 rpm for 20-30 minutes. Then, the mixture is transferred to a twin-screw extruder, and the additive is fed into the side feed port. After melt blending, the mixture is granulated to a particle size of 0.1-0.5 mm to obtain the filler. The mass ratio of maleic anhydride-grafted POE, acrylate rubber powder, and maleic anhydride-grafted PP wax is 100:20-30:6-10, and the mass of the additive is 1.5-2 times the mass of maleic anhydride-grafted POE.

[0010] Preferably, the additive is prepared by mixing EPDM rubber powder, N550 carbon black, paraffin oil, sulfur, accelerator CZ, zinc oxide and stearic acid, and the mass ratio of EPDM rubber powder, N550 carbon black, paraffin oil, sulfur, accelerator CZ, zinc oxide and stearic acid is 100:40-50:15-25:0.5-1:1.5-2.5:5-7:1-2.

[0011] Preferably, the masterbatch C is prepared by the following method: polyethylene terephthalate chips, mixture, maleic anhydride graft compatibilizer and antioxidant are added to a mixer, stirred at 400-600 rpm for 20-30 minutes, melt-blended and then granulated to a particle size of 1-2 mm to obtain masterbatch C. The mass ratio of polyethylene terephthalate chips, mixture, maleic anhydride graft compatibilizer and antioxidant is 100:25-35:3-8:0.6-1, and antioxidant 1010 is selected as the antioxidant.

[0012] Preferably, the mixture is prepared by mixing and drying nano-silica, KH550, polyvinylpyrrolidone K30 and an aqueous ethanol solution, wherein the mass ratio of nano-silica, KH550, polyvinylpyrrolidone K30 and the aqueous ethanol solution is 100:1.5-3:0.5-1.5:20-30, and the mass concentration of the aqueous ethanol solution is 60-70%.

[0013] Preferably, the process includes the following steps: weighing masterbatch A, masterbatch B, masterbatch C, isophthalic acid, tetrabutyl titanate, and triphenyl phosphate as needed and adding them to a mixer; stirring at 600-800 rpm for 30-40 minutes; sending the resulting product into a melt spinning machine; setting the spinning temperature to 260-280℃ and the spinning speed to 3000-6000 m / min; rapidly cooling and solidifying the filaments in the spinning channel; and then performing 2-3 stages of stretching, with a total stretching ratio of 4-6 times, to obtain a polyester fiber composite material.

[0014] A method for manufacturing a high-strength rope based on polyester fiber composite material includes the following steps: S1: Polyester fiber composite material is used as the raw yarn and twisted on a twisting machine to form a single strand yarn with a twist of 80 to 120 twists / meter; S2: The 6 to 12 single-ply yarns obtained in S1 are twisted and plyed a second time in the same twist direction through a plying machine to form multifilament yarn with a linear density of 1000 to 3000 denier and a ply twist of 40 to 60 twists / meter. S3: The multifilament yarn obtained in S2 is continuously passed through an impregnation tank and impregnated with a polyurethane emulsion with a concentration of 8-12 wt% for 5-10 seconds. Then, it is dried and pre-cured in a hot air drying tunnel at 120-140℃ for 2-4 minutes to form a uniform adhesive protective film on the yarn surface. S4: The 16-20 multifilament yarns treated in S3 are used as a single strand and braided into a rope blank by a high-speed braiding machine. The rope blank is passed through a high-temperature hot air tunnel oven and heat-set at a temperature of 180-220°C and a tension of 0.5-1.0 cN / dtex for 3-6 minutes. Then, it is post-cured in an oven at 80-100°C for 2-4 hours to obtain a high-strength rope based on polyester fiber composite material.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the filler in masterbatch B is composed of maleic anhydride-grafted POE and acrylate rubber powder to form a flexible interface layer. The EPDM rubber powder in the additives further enhances the elasticity and dispersibility of the filler. Meanwhile, the mixture in masterbatch C uses nano-silica modified with KH550 coupling agent, which effectively increases the bonding force between the filler and the polyester molecular chain. The multi-level interface design ensures the uniform dispersion of the filler in the matrix and constructs an efficient stress transfer network, thereby solving the problem of low stress transfer efficiency caused by poor interface compatibility and fundamentally improving the tensile strength of the polyester fiber composite material.

[0016] 2. In this invention, the masterbatches achieve good compatibility through precise proportioning and maleic anhydride graft compatibilizer. The reaction process is further regulated by additives such as isophthalic acid, which facilitates the smooth progress of melt spinning and stretching processes. This improves the orientation and crystallinity of the fiber molecular chains, effectively reducing the inherent defects of polyester fiber composite materials. Furthermore, the high-strength ropes woven from the original yarns, after being impregnated with polyurethane emulsion and heat-set, form a tough protective film on the surface, and the internal yarns are firmly bonded, thus giving them excellent aging resistance and ensuring the service life of the ropes. Attached Figure Description

[0017] Figure 1 A flowchart of a high-strength rope based on polyester fiber composite material and its manufacturing method is provided for this invention; Figure 2 The present invention provides a flowchart of a method for manufacturing polyester fiber composite materials. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that the raw materials used in the following embodiments are all commercially available.

[0020] Example 1: A polyester fiber composite material, comprising the following raw materials in parts by weight: 60 parts masterbatch A, 20 parts masterbatch B, 20 parts masterbatch C, 3 parts isophthalic acid, 0.02 parts tetrabutyl titanate and 0.02 parts triphenyl phosphate; The method for producing polyester fiber composite materials includes the following steps: weigh out masterbatch A, masterbatch B, masterbatch C, isophthalic acid, tetrabutyl titanate and triphenyl phosphate as needed and add them to a mixer. Set the mixer to 600 rpm and stir for 30 min. Send the resulting product to a melt spinning machine. Set the spinning temperature to 260℃ and the spinning speed to 3000 m / min. The filaments are rapidly cooled and solidified in the spinning channel. Then, perform two-stage stretching with a total stretching ratio of 4 times to obtain polyester fiber composite materials.

[0021] The raw materials for Master A, Master B, and Master C are all polyethylene terephthalate (PET) chips. The PET chips are dried before use. Master B and Master C are prepared by further processing the dried PET chips.

[0022] The drying method for polyethylene terephthalate (PET) chips is as follows: vacuum drying at 120°C for 4 hours to complete the drying process of PET chips.

[0023] The preparation method of masterbatch B is as follows: polyethylene terephthalate chips, fillers and Fischer-Tropsch wax are added to a mixer at a mass ratio of 100:25:2, and the mixture is stirred at 60 rpm for 20 min. The resulting product is fed into a twin-screw extruder, and the temperature range is set to 230℃. After melt blending, the product is granulated to a particle size of 1 mm to obtain masterbatch B.

[0024] The filler is prepared by the following method: maleic anhydride-grafted POE, acrylate rubber powder, and maleic anhydride-grafted PP wax are fed into a mixer and stirred at 200 rpm for 20 minutes. Then, the mixture is transferred to a twin-screw extruder, and the additive is fed into the side feed port. After melt blending, the mixture is granulated to a particle size of 0.1 mm to obtain the filler. The mass ratio of maleic anhydride-grafted POE, acrylate rubber powder, and maleic anhydride-grafted PP wax is 100:20:6, and the mass of the additive is 1.5 times the mass of maleic anhydride-grafted POE.

[0025] The additives are prepared by mixing EPDM rubber powder, N550 carbon black, paraffin oil, sulfur, accelerator CZ, zinc oxide and stearic acid in a mass ratio of 100:40:15:0.5:1.5:5:1.

[0026] Masterbatch C is prepared by the following method: polyethylene terephthalate chips, mixture, maleic anhydride graft compatibilizer and antioxidant are added to a mixer, stirred at 400 rpm for 20 min, melt-blended and then granulated to a particle size of 1 mm to obtain masterbatch C. The mass ratio of polyethylene terephthalate chips, mixture, maleic anhydride graft compatibilizer and antioxidant is 100:25:3:0.6, and antioxidant 1010 is selected.

[0027] The mixture is prepared by mixing and drying nano-silica, KH550, polyvinylpyrrolidone K30 and ethanol aqueous solution. The mass ratio of nano-silica, KH550, polyvinylpyrrolidone K30 and ethanol aqueous solution is 100:1.5:0.5:20, and the mass concentration of the ethanol aqueous solution is 60%.

[0028] A method for manufacturing a high-strength rope based on polyester fiber composite material includes the following steps: S1: Polyester fiber composite material is used as the raw yarn and twisted on a twisting machine to form a single strand yarn with a twist of 80 twists / meter; S2: The six single-ply yarns obtained in S1 are twisted and plyed a second time in the same twist direction using a plying machine to form a multifilament yarn with a linear density of 1000 denier and a ply twist of 40 twists / meter. S3: The multifilament yarn obtained in S2 is continuously passed through an impregnation tank and impregnated with a polyurethane emulsion with a concentration of 8wt% for 5s. Then, it is dried and pre-cured at 120℃ through a hot air drying tunnel for 2min to form a uniform adhesive protective film on the yarn surface. S4: The 16 multifilament yarns treated in S3 are used as a single strand and woven into a rope blank by a high-speed braiding machine. The rope blank is passed through a high-temperature hot air tunnel oven and heat-set at 180°C and a tension of 0.5 cN / dtex for 3 minutes. Then, it is post-cured in an oven at 80°C for 2 hours to obtain a high-strength rope based on polyester fiber composite material.

[0029] Example 2: A polyester fiber composite material, comprising the following raw materials in parts by weight: 70 parts masterbatch A, 25 parts masterbatch B, 25 parts masterbatch C, 4 parts isophthalic acid, 0.03 parts tetrabutyl titanate and 0.03 parts triphenyl phosphate; The method for producing polyester fiber composite materials includes the following steps: weigh out masterbatch A, masterbatch B, masterbatch C, isophthalic acid, tetrabutyl titanate and triphenyl phosphate as needed and add them to a mixer. Set the mixer to 700 rpm and stir for 35 min. The resulting product is sent to a melt spinning machine. Set the spinning temperature to 270℃ and the spinning speed to 4500 m / min. The filaments are rapidly cooled and solidified in the spinning channel. Then, perform two-stage stretching with a total stretching ratio of 5 times to obtain polyester fiber composite materials.

[0030] The raw materials for Master A, Master B, and Master C are all polyethylene terephthalate (PET) chips. The PET chips are dried before use. Master B and Master C are prepared by further processing the dried PET chips.

[0031] The drying method for polyethylene terephthalate (PET) slices is as follows: vacuum drying at 130℃ for 5 hours to complete the drying process of PET slices.

[0032] The preparation method of masterbatch B is as follows: polyethylene terephthalate chips, fillers and Fischer-Tropsch wax are added to a mixer at a mass ratio of 100:30:2.5, and the mixture is stirred at 80 rpm for 25 min. The resulting product is fed into a twin-screw extruder, the temperature range is set to 240℃, and after melt blending, it is granulated. The particle size of the granules is 1.5 mm, thus obtaining masterbatch B.

[0033] The filler is prepared by the following method: maleic anhydride-grafted POE, acrylate rubber powder, and maleic anhydride-grafted PP wax are fed into a mixer and stirred at 300 rpm for 25 minutes. Then, the mixture is transferred to a twin-screw extruder, and the additive is fed into the side feed port. After melt blending, the mixture is granulated to a particle size of 0.3 mm to obtain the filler. The mass ratio of maleic anhydride-grafted POE, acrylate rubber powder, and maleic anhydride-grafted PP wax is 100:25:8, and the mass of the additive is 1.8 times the mass of maleic anhydride-grafted POE.

[0034] The additives are prepared by mixing EPDM rubber powder, N550 carbon black, paraffin oil, sulfur, accelerator CZ, zinc oxide and stearic acid in a mass ratio of 100:45:20:0.8:2:6:1.5.

[0035] Masterbatch C is prepared by the following method: polyethylene terephthalate chips, mixture, maleic anhydride graft compatibilizer and antioxidant are added to a mixer, stirred at 500 rpm for 25 min, melt-blended and then granulated. The particle size of the granules is 1.5 mm to obtain masterbatch C. The mass ratio of polyethylene terephthalate chips, mixture, maleic anhydride graft compatibilizer and antioxidant is 100:30:5:0.8. Antioxidant 1010 is selected.

[0036] The mixture is prepared by mixing and drying nano-silica, KH550, polyvinylpyrrolidone K30 and ethanol aqueous solution. The mass ratio of nano-silica, KH550, polyvinylpyrrolidone K30 and ethanol aqueous solution is 100:2.2:1:25, and the mass concentration of the ethanol aqueous solution is 65%.

[0037] A method for manufacturing a high-strength rope based on polyester fiber composite material includes the following steps: S1: Polyester fiber composite material is used as the raw yarn and twisted on a twisting machine to form a single strand yarn with a twist of 100 twists / meter; S2: The 9 single-ply yarns obtained in S1 are twisted and plyed a second time in the same twist direction through a plying machine to form a multifilament yarn with a linear density of 2000 denier and a ply twist of 50 twists / meter. S3: The multifilament yarn obtained in S2 is continuously passed through an impregnation tank and impregnated with a polyurethane emulsion with a concentration of 10 wt% for 8 seconds. Then, it is dried and pre-cured at 130°C through a hot air drying tunnel for 3 minutes to form a uniform adhesive protective film on the yarn surface. S4: The 18 multifilament yarns treated in S3 are used as a single strand and woven into a rope blank by a high-speed braiding machine. The rope blank is passed through a high-temperature hot air tunnel oven and heat-set at 200°C and a tension of 0.8 cN / dtex for 5 minutes. Then, it is post-cured in an oven at 90°C for 3 hours to obtain a high-strength rope based on polyester fiber composite material.

[0038] Example 3: A polyester fiber composite material, comprising the following raw materials in parts by weight: 80 parts masterbatch A, 30 parts masterbatch B, 30 parts masterbatch C, 5 parts isophthalic acid, 0.05 parts tetrabutyl titanate and 0.05 parts triphenyl phosphate; The method for producing polyester fiber composite materials includes the following steps: weighing masterbatch A, masterbatch B, masterbatch C, isophthalic acid, tetrabutyl titanate and triphenyl phosphate as needed and adding them to a mixer, stirring at 800 rpm for 40 min, sending the resulting product to a melt spinning machine, setting the spinning temperature to 280℃ and the spinning speed to 6000 m / min, rapidly cooling and solidifying the filaments in the spinning channel, and then performing three stages of stretching with a total stretching ratio of 6 times to obtain the polyester fiber composite material.

[0039] The raw materials for Master A, Master B, and Master C are all polyethylene terephthalate (PET) chips. The PET chips are dried before use. Master B and Master C are prepared by further processing the dried PET chips.

[0040] The drying method for polyethylene terephthalate (PET) chips is as follows: vacuum drying at 140℃ for 6 hours to complete the drying process of PET chips.

[0041] The preparation method of masterbatch B is as follows: polyethylene terephthalate chips, fillers and Fischer-Tropsch wax are added to a mixer at a mass ratio of 100:35:3. The mixture is stirred at 100 rpm for 30 min. The resulting product is fed into a twin-screw extruder. The temperature range is set to 250℃. After melt blending, the product is granulated. The particle size of the granules is 2 mm, thus obtaining masterbatch B.

[0042] The filler is prepared by the following method: maleic anhydride-grafted POE, acrylate rubber powder, and maleic anhydride-grafted PP wax are fed into a mixer and stirred at 400 rpm for 30 minutes. Then, the mixture is transferred to a twin-screw extruder, and the additive is fed into the side feed port. After melt blending, the mixture is granulated to a particle size of 0.5 mm to obtain the filler. The mass ratio of maleic anhydride-grafted POE, acrylate rubber powder, and maleic anhydride-grafted PP wax is 100:30:10, and the mass of the additive is twice the mass of maleic anhydride-grafted POE.

[0043] The additives are prepared by mixing EPDM rubber powder, N550 carbon black, paraffin oil, sulfur, accelerator CZ, zinc oxide and stearic acid in a mass ratio of 100:50:25:1:2.5:7:2.

[0044] Masterbatch C is prepared by the following method: polyethylene terephthalate chips, mixture, maleic anhydride graft compatibilizer and antioxidant are added to a mixer, stirred at 600 rpm for 30 min, melt-blended and then granulated to a particle size of 2 mm to obtain masterbatch C. The mass ratio of polyethylene terephthalate chips, mixture, maleic anhydride graft compatibilizer and antioxidant is 100:35:8:1, and antioxidant 1010 is selected.

[0045] The mixture is prepared by mixing and drying nano-silica, KH550, polyvinylpyrrolidone K30 and ethanol aqueous solution. The mass ratio of nano-silica, KH550, polyvinylpyrrolidone K30 and ethanol aqueous solution is 100:3:1.5:30, and the mass concentration of the ethanol aqueous solution is 70%.

[0046] A method for manufacturing a high-strength rope based on polyester fiber composite material includes the following steps: S1: Polyester fiber composite material is used as the raw yarn and twisted on a twisting machine to form a single yarn with a twist of 120 twists / meter; S2: The 12 single-ply yarns obtained in S1 are twisted and plied a second time in the same twist direction through a plitting machine to form a multifilament yarn with a linear density of 3000 denier and a plitting twist of 60 twists / meter. S3: The multifilament yarn obtained in S2 is continuously passed through an impregnation tank and impregnated with a polyurethane emulsion with a concentration of 12 wt% for 10 seconds. Then, it is dried and pre-cured at 140°C through a hot air drying tunnel for 4 minutes to form a uniform adhesive protective film on the yarn surface. S4: The 20 multifilament yarns treated in S3 are used as a single strand and woven into a rope blank by a high-speed braiding machine. The rope blank is passed through a high-temperature hot air tunnel oven and heat-set at 220°C and a tension of 1.0 cN / dtex for 6 minutes. Then, it is post-cured in an oven at 100°C for 4 hours to obtain a high-strength rope based on polyester fiber composite material.

[0047] Comparative Example 1: The difference between this comparative example and Example 1 is that this comparative example does not contain masterbatch B.

[0048] Comparative Example 2 differs from Example 1 in that it does not contain masterbatch C.

[0049] Comparative Example 3: The difference between this comparative example and Example 1 is that this comparative example does not contain any additives.

[0050] Performance testing: The high-strength ropes prepared in Examples 1-3 and Comparative Examples 1-3 were subjected to performance testing; Tensile strength test: According to GB / T 8834-2016 standard, the sample length is 2m and the tensile speed is 100 mm / min. The tensile strength (MPa) is measured and recorded in Table 1. Anti-aging performance: A 500-hour aging test was conducted in accordance with GB / T 16422.2-2022 standard, and the tensile strength (MPa) and tensile strength retention rate (%) after aging were tested in accordance with GB / T 8834-2016 standard and recorded in Table 1.

[0051] Table 1:

[0052] Analysis and comparison of the data in the table above show that the tensile strength and aging resistance of the ropes prepared by the methods of Examples 1-3 are significantly better than those of Comparative Examples 1-3. Furthermore, the strength retention rate after accelerated aging of Examples 1-3 is all above 90%. This is due to the flexible interface layer constructed by masterbatch B and the strong interfacial bonding force brought by KH550 modified nano silica in masterbatch C. The two work together to ensure the efficient transfer of stress between the matrix and the filler. At the same time, the precise process control and the use of additives result in very few internal defects in the material and higher fiber molecular chain orientation and crystallinity, thereby giving the product extremely high initial strength and service life. Further analysis revealed that Comparative Example 1, lacking masterbatch B, exhibited significantly reduced initial tensile strength and aging retention rate. This indicates that the absence of masterbatch B signifies the loss of the flexible interfacial layer composed of maleic anhydride-grafted POE and acrylate rubber powder, leading to decreased material toughness and increased susceptibility to microcracks during aging, resulting in a significant deterioration in its aging resistance. Comparative Example 2, lacking masterbatch C, showed the worst initial tensile strength. This is because the absence of masterbatch C, specifically the lack of the strong interfacial bonding effect provided by the KH550 coupling agent-modified nano-silica, significantly weakened the bond between the filler and the polyester molecular chains, preventing stress from being effectively controlled. Effective transfer of strength resulted in the most severe decrease in initial strength. Although the strength retention rate in the aging test was comparable to that of Comparative Examples 1 and 2, the tensile strength after aging still experienced a precipitous decline due to the poor initial strength and similar retention rates. Comparative Example 3, lacking additives, had acceptable initial strength, but its strength decreased to some extent after aging, resulting in the lowest strength retention rate. This is because the absence of additives affected the uniformity of melt blending and the stability of the reaction process, easily leading to potential defects in the material, which became stress concentration points and aging starting points during the aging process, thus resulting in a poor strength retention rate after aging.

[0053] By comparing and analyzing the relevant data in the table, it can be seen that the high-strength rope based on polyester fiber composite material prepared by this invention not only has good strength properties but also good aging resistance. This indicates that the high-strength rope based on polyester fiber composite material provided by this invention has a broader market prospect and is more suitable for widespread application.

[0054] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A polyester fiber composite material, characterized in that: It includes the following raw materials in parts by weight: 60-80 parts of masterbatch A, 20-30 parts of masterbatch B, 20-30 parts of masterbatch C, 3-5 parts of isophthalic acid, 0.02-0.05 parts of tetrabutyl titanate and 0.02-0.05 parts of triphenyl phosphate; The raw materials for Master A, Master B and Master C are all polyethylene terephthalate chips. The polyethylene terephthalate chips are dried before use. The preparation of Master B and Master C involves further processing of the dried polyethylene terephthalate chips. The preparation method of the masterbatch B is as follows: polyethylene terephthalate chips, fillers and Fischer-Tropsch wax are added to a mixer and stirred at 60-100 rpm for 20-30 minutes. The resulting product is fed into a twin-screw extruder and the temperature range is set to 230-250℃. After melt blending, the product is granulated and the particle size is 1-2 mm to obtain masterbatch B. The filler is prepared by the following method: maleic anhydride-grafted POE, acrylate rubber powder, and maleic anhydride-grafted PP wax are fed into a mixer and stirred at 200-400 rpm for 20-30 minutes. Then, the mixture is transferred to a twin-screw extruder, and the additive is fed into the side feed port. After melt blending, the mixture is granulated to a particle size of 0.1-0.5 mm to obtain the filler. The mass ratio of maleic anhydride-grafted POE, acrylate rubber powder, and maleic anhydride-grafted PP wax is 100:20-30:6-10, and the mass of the additive is 1.5-2 times the mass of maleic anhydride-grafted POE. The raw materials for the additives include EPDM rubber powder, N550 carbon black, paraffin oil, sulfur, accelerator CZ, zinc oxide, and stearic acid.

2. The polyester fiber composite material according to claim 1, characterized in that, The drying method for polyethylene terephthalate (PET) chips is as follows: vacuum drying at 120–140°C for 4–6 hours to complete the drying process of PET chips.

3. The polyester fiber composite material according to claim 1, characterized in that, The mass ratio of polyethylene terephthalate chips, filler, and Fischer-Tropsch wax is 100:25-35:2-3.

4. The polyester fiber composite material according to claim 1, characterized in that, The additive is prepared by mixing EPDM rubber powder, N550 carbon black, paraffin oil, sulfur, accelerator CZ, zinc oxide and stearic acid. The mass ratio of EPDM rubber powder, N550 carbon black, paraffin oil, sulfur, accelerator CZ, zinc oxide and stearic acid is 100:40-50:15-25:0.5-1:1.5-2.5:5-7:1-2.

5. The polyester fiber composite material according to claim 1, characterized in that, The masterbatch C is prepared by the following method: polyethylene terephthalate chips, mixture, maleic anhydride graft compatibilizer and antioxidant are added to a mixer, stirred at 400-600 rpm for 20-30 minutes, melt-blended and then granulated to a particle size of 1-2 mm to obtain masterbatch C. The mass ratio of polyethylene terephthalate chips, mixture, maleic anhydride graft compatibilizer and antioxidant is 100:25-35:3-8:0.6-1, and antioxidant 1010 is selected.

6. The polyester fiber composite material according to claim 5, characterized in that, The mixture is prepared by mixing and drying nano-silica, KH550, polyvinylpyrrolidone K30 and an aqueous ethanol solution. The mass ratio of nano-silica, KH550, polyvinylpyrrolidone K30 and aqueous ethanol solution is 100:1.5-3:0.5-1.5:20-30, and the mass concentration of the aqueous ethanol solution is 60-70%.

7. The method for producing the polyester fiber composite material according to any one of claims 1 to 6, characterized in that, The process includes the following steps: Weigh out masterbatch A, masterbatch B, masterbatch C, isophthalic acid, tetrabutyl titanate, and triphenyl phosphate as needed and add them to a mixer. Set the mixer to 600-800 rpm and stir for 30-40 minutes. The resulting product is then fed into a melt spinning machine. Set the spinning temperature to 260-280℃ and the spinning speed to 3000-6000 m / min. The filaments are rapidly cooled and solidified in the spinning channel. Subsequently, the filaments undergo 2-3 stages of stretching, with a total stretching ratio of 4-6 times, to obtain a polyester fiber composite material.

8. The method for manufacturing a high-strength rope based on polyester fiber composite material according to claim 7, characterized in that, Includes the following steps: S1: Polyester fiber composite material is used as the raw yarn and twisted on a twisting machine to form a single strand yarn with a twist of 80 to 120 twists / meter; S2: The 6 to 12 single-ply yarns obtained in S1 are twisted and plyed a second time in the same twist direction through a plying machine to form multifilament yarn with a linear density of 1000 to 3000 denier and a ply twist of 40 to 60 twists / meter. S3: The multifilament yarn obtained in S2 is continuously passed through an impregnation tank and impregnated with a polyurethane emulsion with a concentration of 8-12 wt% for 5-10 seconds. Then, it is dried and pre-cured in a hot air drying tunnel at 120-140℃ for 2-4 minutes to form a uniform adhesive protective film on the yarn surface. S4: The 16-20 multifilament yarns treated in S3 are used as a single strand and braided into a rope blank by a high-speed braiding machine. The rope blank is passed through a high-temperature hot air tunnel oven and heat-set at a temperature of 180-220°C and a tension of 0.5-1.0 cN / dtex for 3-6 minutes. Then, it is post-cured in an oven at 80-100°C for 2-4 hours to obtain a high-strength rope based on polyester fiber composite material.

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