Production method of strong yarn pulling rope

Abstract

The invention relates to the technical field of traction ropes, in particular to a production method of a strong yarn traction rope, which comprises the following steps: S1, raw material preparation, S2, filler preparation, S3, raw material pretreatment, S4, blending treatment, S5, twisting treatment, S6, stranding treatment, and S7, curing and weaving treatment. According to the invention, the filler takes polyhedral oligomeric silsesquioxane as a rigid skeleton, the cage structure of the polyhedral oligomeric silsesquioxane provides dimensional stability, the epoxy-terminated hyperbranched polyester is firmly combined with a polyester matrix through active functional groups of the epoxy-terminated hyperbranched polyester, and the carbon nanohorns and the boron nitride nanosheets are used as nanoscale reinforcements, so that the interface contact area is effectively increased; under the synergistic effect of bridging of p-hydroxybenzoic acid and addition materials, the components are firmly combined with a polyethylene glycol terephthalate matrix in a multi-layer mode, stress can be effectively transmitted and dispersed through strong interface combination, and early material damage caused by interface weakness and stress concentration is eliminated.

Description

Technical Field

[0001] This invention relates to the field of traction rope technology, specifically a method for producing a high-strength wire traction rope. Background Technology

[0002] High-strength synthetic fiber traction ropes are cable products made from high-strength synthetic fibers as the basic raw material through processes such as twisting, plying, impregnation, and weaving. These products have excellent properties such as high strength, light weight, corrosion resistance, and fatigue resistance, and are widely used in marine engineering, industrial hoisting, rescue equipment, and sports equipment. The core of their performance lies in the high strength of the fiber itself and the stable yarn structure formed during subsequent processing, which is an important development direction for high-performance ropes and cables.

[0003] In existing technologies, when reinforcing components are introduced to improve the mechanical properties of traction ropes, the interfacial bonding force between the reinforcing components and the polymer matrix is ​​often insufficient and unevenly dispersed, leading to stress concentration points. Under long-term high loads and dynamic loads, the material is prone to failure at the weak points of the interface, resulting in early damage to the rope structure. This interfacial failure caused by improper introduction of reinforcing components has become a key bottleneck restricting the synergistic improvement of high strength and long service life in traction ropes. Based on this, the present invention provides a method for producing a high-strength traction rope. Summary of the Invention

[0004] The purpose of this invention is to provide a method for producing a high-strength wire traction rope. The high-strength wire traction rope prepared by this invention not only has good tensile strength, but also good durability.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for producing a high-strength traction rope, comprising the following steps: S1: Raw material preparation, the weight parts of each raw material are: 80-100 parts polyethylene terephthalate chips, 8-10 parts filler, 3-5 parts isophthalic acid, 0.02-0.05 parts tetrabutyl titanate and 0.02-0.05 parts triphenyl phosphate; S2: Filler preparation, the raw materials of the filler include cage-type polysilsesquioxane, terminal epoxy hyperbranched polyester, additives, tetrahydrofuran, carbon nano-angles, boron nitride nanosheets and p-hydroxybenzoic acid; S3: Raw material pretreatment, pretreatment of polyethylene terephthalate chips and fillers in the raw materials, ready for use; S4: Blending process, the pretreated polyethylene terephthalate chips, fillers and other raw materials are mixed and fed into a melt spinning machine, then cooled, cured and stretched to obtain the base material; S5: Twisting treatment, the base material is twisted to obtain single-ply yarn; S6: Plitting process, multiple single-ply yarns are plied together to obtain composite yarn; S7: Curing and weaving treatment, which involves curing and weaving composite yarns to produce a high-strength traction rope.

[0006] Preferably, the filler is prepared by: adding cage-type polysilsesquioxane, terminal epoxy-terminated hyperbranched polyester, additives and tetrahydrofuran into a mixer, stirring at 200-300 rpm for 10-20 min, then ultrasonically dispersing at 300-500 W for 20-40 min, adding carbon nanoparticles, stirring at 200-300 rpm for 10-20 min at 60-65°C, adding boron nitride nanosheets and p-hydroxybenzoic acid, heating to 110-120°C, stirring at 200-300 rpm for 40-50 min, and then freeze-drying the resulting product to obtain the filler.

[0007] Preferably, the mass ratio of cage-type polysilsesquioxane, terminal epoxy-based hyperbranched polyester, additives, and tetrahydrofuran is 100:50-60:20-30:300-400, the mass of carbon nano-angles is 40-50% of the mass of cage-type polysilsesquioxane, the mass of boron nitride nanosheets is 30-40% of the mass of cage-type polysilsesquioxane, and the mass of p-hydroxybenzoic acid is 20-30% of the mass of cage-type polysilsesquioxane.

[0008] Preferably, the additive is prepared by the following method: polyimide powder, graphene oxide, hydrotalcite and deionized water are added to a mixer, stirred at 60-100 rpm for 10-20 min, then ultrasonically dispersed at 300-500 W for 20-40 min, then nano-silica, KH550 and anhydrous ethanol are added, and the mixture is refluxed at 60-70°C under nitrogen protection for 6-8 hours. After the reaction is completed, the mixture is cooled, filtered, washed with ethanol, and vacuum dried at 80-90°C for 6-10 h to obtain the additive.

[0009] Preferably, the mass ratio of polyimide powder, graphene oxide, hydrotalcite, and deionized water is 100:8-10:15-20:500-600, the mass of nano-silica is 15-20% of the mass of polyimide powder, the mass of KH550 is 5-8% of the mass of polyimide powder, and the mass of anhydrous ethanol is 2-3 times the mass of polyimide powder.

[0010] Preferably, the raw material pretreatment method is as follows: polyethylene terephthalate chips are placed in a vacuum drying oven and vacuum dried at 120-140°C and a vacuum degree of -0.09MPa for 4-6 hours; the filler is placed in a drying oven and vacuum dried at 60-80°C and a vacuum degree of -0.08MPa for 2-4 hours to complete the raw material pretreatment.

[0011] Preferably, the blending process is as follows: pretreated polyethylene terephthalate chips, fillers, and other raw materials are weighed as needed and added to a mixer. The mixture is stirred at 200-400 rpm for 30-40 minutes. The resulting product is fed into a melt spinning machine. The spinning temperature is set to 260-280°C, and the spinning speed is 4000-6000 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 the base material.

[0012] Preferably, the twisting process is as follows: the base material is fed into a twisting machine for twisting to form a single strand yarn with a twist of 80 to 120 twists / meter.

[0013] Preferably, the plying process is as follows: 10 single-ply yarns are plyed twice with the same twist direction through a plying machine to form a multifilament yarn with a linear density of 2500 denier and a plying twist of 55 twists / meter, thus obtaining a composite yarn.

[0014] Preferably, the curing and weaving process is as follows: the composite yarn is continuously fed into an impregnation tank and impregnated with a polyurethane emulsion with a concentration of 8-12 wt% for 8-10 seconds. Then, it is dried and pre-cured in a hot air drying tunnel at 120-140°C for 2-4 minutes. 18-22 multifilament yarns are woven into a blank by a high-speed weaving machine. The blank is passed through a high-temperature hot air tunnel oven and heat-set at 180-220°C with a tension of 0.5-1.0 cN / dtex for 4-8 minutes. Then, it is post-cured in an oven at 80-100°C for 2-4 hours to obtain a high-strength traction rope.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the filler uses cage-type polysilsesquioxane as a rigid skeleton, and its cage structure provides dimensional stability. The terminal epoxy hyperbranched polyester forms a strong bond with the polyester matrix through its active functional groups. Carbon nano-angles and boron nitride nanosheets serve as nanoscale reinforcements, effectively increasing the interfacial contact area. Under the bridging effect of p-hydroxybenzoic acid and the synergistic effect of additives, these components achieve a multi-layered strong bond with the polyethylene terephthalate matrix. This strong interfacial bond can effectively transfer and disperse stress, eliminating early material failure caused by weak interfaces and stress concentration, so that the traction rope can simultaneously take into account mechanical properties and durability.

[0016] 2. In this invention, boron nitride nanosheets in the filler improve interfacial performance, while their two-dimensional layered structure and carbon nanofibers can inhibit the propagation of microcracks. Components such as hydrotalcite in the additives can enhance anti-aging performance. The synergistic effect of these components enables the traction rope to exhibit excellent fatigue resistance under dynamic loads, while its resistance to environmental aging is also significantly enhanced, comprehensively ensuring the ultra-long service life of the traction rope in harsh application scenarios. Attached Figure Description

[0017] Figure 1 The present invention provides a flowchart of a method for producing a high-strength wire traction rope. 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:

[0021] A method for producing a high-strength traction rope includes the following steps: S1: Raw material preparation, the weight parts of each raw material are: 80 parts polyethylene terephthalate chips, 8 parts filler, 3 parts isophthalic acid, 0.02 parts tetrabutyl titanate and 0.02 parts triphenyl phosphate; S2: Filler preparation, the raw materials of the filler include cage-type polysilsesquioxane, terminal epoxy hyperbranched polyester, additives, tetrahydrofuran, carbon nano-angles, boron nitride nanosheets and p-hydroxybenzoic acid; The filler was prepared as follows: cage-type polysilsesquioxane, terminal epoxy-terminated hyperbranched polyester, additives, and tetrahydrofuran were added to a mixer in a mass ratio of 100:50:200:300. The mixture was stirred at 200 rpm for 10 min, followed by ultrasonic dispersion at 300 W for 20 min. 40% of the mass of cage-type polysilsesquioxane carbon nanofibers were added, and the mixture was stirred at 200 rpm for 10 min at 60 °C. 30% of the mass of cage-type polysilsesquioxane boron nitride nanosheets and 20% of the mass of cage-type polysilsesquioxane p-hydroxybenzoic acid were added. The mixture was heated to 110 °C and stirred at 200 rpm for 40 min. The resulting product was freeze-dried to obtain the filler. The additive was prepared by the following method: polyimide powder, graphene oxide, hydrotalcite and deionized water were added to a mixer in a mass ratio of 100:8:15:500, stirred at 60 rpm for 10 min, then ultrasonically dispersed at 300 W for 20 min, and then 15% by weight of nano-silica, 5% by weight of KH550 and twice the weight of anhydrous ethanol were added. The mixture was refluxed at 60 °C under nitrogen protection for 6 hours. After the reaction was completed, the mixture was cooled, filtered, washed with ethanol, and vacuum dried at 80 °C for 6 hours to obtain the additive. S3: Raw material pretreatment, pretreatment of polyethylene terephthalate chips and fillers in the raw materials, ready for use; The raw material pretreatment method is as follows: polyethylene terephthalate chips are placed in a vacuum drying oven and vacuum dried at 120℃ and a vacuum degree of -0.09MPa for 4 hours. The filler is placed in a drying oven and vacuum dried at 60℃ and a vacuum degree of -0.08MPa for 2 hours to complete the raw material pretreatment. S4: Blending process, the pretreated polyethylene terephthalate chips, fillers and other raw materials are mixed and fed into a melt spinning machine, then cooled, cured and stretched to obtain the base material; The blending process is as follows: Weigh the pretreated polyethylene terephthalate chips, fillers, and other raw materials as needed and add them to the mixer. Set the mixer to 200 rpm and stir for 30 minutes. The resulting product is then fed into a melt spinning machine. Set the spinning temperature to 260℃ and the spinning speed to 4000 m / min. The filaments are rapidly cooled and solidified in the spinning tunnel. Subsequently, the filaments undergo two stages of stretching with a total stretching ratio of 4 times to obtain the base material. S5: Twisting treatment, the base material is twisted to obtain single-ply yarn; The twisting process is as follows: the base material is fed into a twisting machine for twisting to form a single strand of yarn with a twist of 80 to 120 twists / meter; S6: Plitting process, multiple single-ply yarns are plied together to obtain composite yarn; The plying process is as follows: 10 single-ply yarns are plyed twice with the same twist direction through a plying machine to form a multifilament yarn with a linear density of 2500 denier and a plying twist of 55 twists / meter, thus obtaining a composite yarn. S7: Curing and weaving treatment, which involves curing and weaving composite yarns to produce a high-strength traction rope.

[0022] The curing and weaving process is as follows: the composite yarn is continuously fed into the impregnation tank and impregnated with a polyurethane emulsion with a concentration of 8wt% for 8 seconds. Then, it is dried and pre-cured at 120°C in a hot air drying tunnel for 2 minutes. The 18 multifilament yarns are woven into a blank by a high-speed weaving machine. The 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 4 minutes. Then, it is post-cured in an oven at 80°C for 2 hours to obtain a high-strength traction rope.

[0023] Example 2:

[0024] A method for producing a high-strength traction rope includes the following steps: S1: Raw material preparation, the weight parts of each raw material are: 90 parts polyethylene terephthalate chips, 9 parts filler, 4 parts isophthalic acid, 0.03 parts tetrabutyl titanate and 0.04 parts triphenyl phosphate; S2: Filler preparation, the raw materials of the filler include cage-type polysilsesquioxane, terminal epoxy hyperbranched polyester, additives, tetrahydrofuran, carbon nano-angles, boron nitride nanosheets and p-hydroxybenzoic acid; The filler was prepared as follows: cage-type polysilsesquioxane, terminal epoxy-terminated hyperbranched polyester, additives, and tetrahydrofuran were added to a mixer in a mass ratio of 100:55:25:350. The mixture was stirred at 250 rpm for 15 min, followed by ultrasonic dispersion at 400 W for 30 min. 45% of the mass of cage-type polysilsesquioxane carbon nanofibers were added, and the mixture was stirred at 250 rpm for 15 min at 62 °C. 35% of the mass of cage-type polysilsesquioxane boron nitride nanosheets and 25% of the mass of cage-type polysilsesquioxane p-hydroxybenzoic acid were added. The mixture was heated to 115 °C and stirred at 250 rpm for 45 min. The resulting product was freeze-dried to obtain the filler. The additive was prepared by the following method: polyimide powder, graphene oxide, hydrotalcite and deionized water were added to a mixer in a mass ratio of 100:9:18:550, stirred at 80 rpm for 15 min, then ultrasonically dispersed at 400 W for 30 min, followed by the addition of 18% by weight of nano-silica, 6% by weight of KH550, and 2.5 times by weight of anhydrous ethanol. The mixture was refluxed at 65°C under nitrogen protection for 7 hours. After the reaction was completed, the mixture was cooled, filtered, washed with ethanol, and vacuum dried at 85°C for 8 hours to obtain the additive. S3: Raw material pretreatment, pretreatment of polyethylene terephthalate chips and fillers in the raw materials, ready for use; The raw material pretreatment method is as follows: polyethylene terephthalate chips are placed in a vacuum drying oven and vacuum dried at 130℃ and a vacuum degree of -0.09MPa for 5 hours. The filler is placed in a drying oven and vacuum dried at 70℃ and a vacuum degree of -0.08MPa for 3 hours to complete the raw material pretreatment. S4: Blending process, the pretreated polyethylene terephthalate chips, fillers and other raw materials are mixed and fed into a melt spinning machine, then cooled, cured and stretched to obtain the base material; The blending process is as follows: Weigh the pretreated polyethylene terephthalate chips, fillers, and other raw materials as needed and add them to the mixer. Set the mixer to 300 rpm and stir for 35 minutes. The resulting product is then fed into a melt spinning machine. Set the spinning temperature to 270℃ and the spinning speed to 5000 m / min. The filaments are rapidly cooled and solidified in the spinning channel. Subsequently, the filaments undergo two stages of stretching with a total stretching ratio of 5 times to obtain the base material. S5: Twisting treatment, the base material is twisted to obtain single-ply yarn; The twisting process is as follows: the base material is fed into a twisting machine for twisting to form a single strand of yarn with a twist of 100 twists / meter; S6: Plitting process, multiple single-ply yarns are plied together to obtain composite yarn; The plying process is as follows: 10 single-ply yarns are plyed twice with the same twist direction through a plying machine to form a multifilament yarn with a linear density of 2500 denier and a plying twist of 55 twists / meter, thus obtaining a composite yarn. S7: Curing and weaving treatment, which involves curing and weaving composite yarns to produce a high-strength traction rope.

[0025] The curing and weaving process is as follows: the composite yarn is continuously fed into the impregnation tank and impregnated with a 10wt% polyurethane emulsion for 8 seconds. Then, it is dried and pre-cured at 130°C in a hot air drying tunnel for 3 minutes. Twenty multifilament yarns are woven into a blank by a high-speed weaving machine. The 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 6 minutes. Then, it is post-cured in an oven at 90°C for 3 hours to obtain a high-strength traction rope.

[0026] Example 3:

[0027] A method for producing a high-strength traction rope includes the following steps: S1: Raw material preparation, the weight parts of each raw material are: 100 parts polyethylene terephthalate chips, 10 parts filler, 5 parts isophthalic acid, 0.05 parts tetrabutyl titanate and 0.05 parts triphenyl phosphate; S2: Filler preparation, the raw materials of the filler include cage-type polysilsesquioxane, terminal epoxy hyperbranched polyester, additives, tetrahydrofuran, carbon nano-angles, boron nitride nanosheets and p-hydroxybenzoic acid; The filler was prepared as follows: cage-type polysilsesquioxane, terminal epoxy-terminated hyperbranched polyester, additives, and tetrahydrofuran were added to a mixer in a mass ratio of 100:60:30:400. The mixture was stirred at 300 rpm for 20 min, followed by ultrasonic dispersion at 500 W for 40 min. 50% of the mass of cage-type polysilsesquioxane carbon nanofibers were added, and the mixture was stirred at 300 rpm for 20 min at 65 °C. 40% of the mass of cage-type polysilsesquioxane boron nitride nanosheets and 30% of the mass of cage-type polysilsesquioxane p-hydroxybenzoic acid were added. The mixture was heated to 120 °C and stirred at 300 rpm for 50 min. The resulting product was freeze-dried to obtain the filler. The additive was prepared by the following method: polyimide powder, graphene oxide, hydrotalcite and deionized water were added to a mixer in a mass ratio of 100:10:20:600, stirred at 100 rpm for 20 min, then ultrasonically dispersed at 500 W for 40 min, followed by the addition of 20% by weight of polyimide powder nano-silica, 8% by weight of polyimide powder KH550 and 3 times by weight of polyimide powder anhydrous ethanol, and refluxed at 70℃ under nitrogen protection for 8 hours. After the reaction was completed, the mixture was cooled, filtered, washed with ethanol, and vacuum dried at 90℃ for 10 h to obtain the additive. S3: Raw material pretreatment, pretreatment of polyethylene terephthalate chips and fillers in the raw materials, ready for use; The raw material pretreatment method is as follows: polyethylene terephthalate chips are placed in a vacuum drying oven and vacuum dried at 140℃ and a vacuum degree of -0.09MPa for 6 hours. The filler is placed in a drying oven and vacuum dried at 80℃ and a vacuum degree of -0.08MPa for 4 hours to complete the raw material pretreatment. S4: Blending process, the pretreated polyethylene terephthalate chips, fillers and other raw materials are mixed and fed into a melt spinning machine, then cooled, cured and stretched to obtain the base material; The blending process is as follows: Weigh the pretreated polyethylene terephthalate chips, fillers, and other raw materials as needed and add them to the mixer. Set the mixer to 400 rpm and stir for 40 minutes. The resulting product is then fed into a melt spinning machine. Set the spinning temperature to 280℃ and the spinning speed to 6000 m / min. The filaments are rapidly cooled and solidified in the spinning tunnel. Subsequently, the filaments undergo three stages of stretching with a total stretching ratio of 6 times to obtain the base material. S5: Twisting treatment, the base material is twisted to obtain single-ply yarn; The twisting process is as follows: the base material is fed into a twisting machine for twisting to form a single strand of yarn with a twist of 120 twists / meter; S6: Plitting process, multiple single-ply yarns are plied together to obtain composite yarn; The plying process is as follows: 10 single-ply yarns are plyed twice with the same twist direction through a plying machine to form a multifilament yarn with a linear density of 2500 denier and a plying twist of 55 twists / meter, thus obtaining a composite yarn. S7: Curing and weaving treatment, which involves curing and weaving composite yarns to produce a high-strength traction rope.

[0028] The curing and weaving process is as follows: the composite yarn is continuously fed into the impregnation tank and impregnated with a 12wt% polyurethane emulsion for 10 seconds. Then, it is dried and pre-cured at 140°C in a hot air drying tunnel for 4 minutes. The 22 multifilament yarns are woven into a blank by a high-speed weaving machine. The 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 8 minutes. Then, it is post-cured in an oven at 100°C for 4 hours to obtain a high-strength traction rope.

[0029] Comparative Example 1: The difference between this comparative example and Example 1 is that this comparative example does not contain fillers.

[0030] Comparative Example 2 differs from Example 1 in that it does not contain any additives.

[0031] Comparative Example 3 differs from Example 1 in that it does not contain carbon nanofibers or boron nitride nanosheets.

[0032] Performance testing: The traction ropes prepared in Examples 1-3 and Comparative Examples 1-3 were subjected to performance tests.

[0033] Tensile strength test: According to GB / T 8834-2016 standard, the sample length was 2m and the tensile speed was 100mm / min. The tensile strength (MPa) was measured and recorded in Table 1. Anti-aging properties: A 500-hour aging test was conducted according to GB / T 16422.2-2022 standard, and the tensile strength (MPa) and tensile strength retention rate (%) after aging were tested according to GB / T 8834-2016 standard and recorded in Table 1.

[0034] Table 1 Traction Rope Strength Test Table

[0035] Analysis of the data in Table 1 shows that the tensile strength and aging tensile strength of the traction ropes prepared by the methods of Examples 1-3 are significantly better than those of Comparative Examples 1-3. The excellent tensile strength before aging indicates good mechanical properties, and the excellent tensile strength after aging indicates durability and long service life. Furthermore, the tensile strength retention rate shows that Examples 1-3 can maintain a stable and high strength retention rate during the aging process. This is mainly due to the synergistic effect of the multi-components in the filler system of this invention. Among them, the cage-type polysilsesquioxane provides support as a rigid skeleton, the terminal epoxy hyperbranched polyester forms crosslinks with the matrix through active functional groups, carbon nanotubes and boron nitride nanosheets disperse stress through nanoscale effects, and the additives optimize the interfacial compatibility and anti-aging properties through the cage-type polysilsesquioxane coupling agent. These components form a strong organic-inorganic hybrid network under the catalysis of p-hydroxybenzoic acid, ensuring efficient stress transfer and inhibiting molecular chain degradation during the aging process. Therefore, high strength and excellent durability are achieved simultaneously. Further analysis and comparison revealed that Comparative Example 1, lacking filler, exhibited the lowest tensile strength and strength retention rate. This indicates that the complete absence of filler led to the complete loss of the reinforcing phase, resulting in severely insufficient interfacial bonding and ineffective stress transfer. Furthermore, the absence of anti-aging components such as hydrotalcite in the filler system accelerated aging and degradation, leading to the worst strength and durability in Comparative Example 1. In contrast, Comparative Example 2, lacking the additives, showed a decrease in both tensile strength and strength retention rate. This suggests that the lack of additives worsened the interfacial compatibility between the filler and the matrix, and the loss of the barrier effect of graphene oxide and the anti-aging function of hydrotalcite made microcracks prone to propagate, resulting in decreased aging performance. Although Comparative Example 3, lacking carbon nanofibers and boron nitride nanosheets, outperformed Comparative Examples 1 and 2 in all aspects, the lack of nano-reinforcing materials weakened the stress dispersion ability of the filler. The interfacial performance was still partially guaranteed by the additives alone, thus the decline in aging performance was relatively moderate. This also indicates that while carbon nanofibers and boron nitride nanosheets affect the mechanical properties of the traction rope, their impact on durability is relatively weak.

[0036] By comparing and analyzing the relevant data in the table, it can be seen that the high-strength traction rope prepared by this invention not only has good tensile strength but also excellent durability. This indicates that the production method of the high-strength traction rope provided by this invention has a broader market prospect and is more suitable for widespread application.

[0037] 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.

[0038] 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 method for producing a high-strength wire traction rope, characterized in that: Includes the following steps: S1: Raw material preparation, the weight parts of each raw material are: 80-100 parts polyethylene terephthalate chips, 8-10 parts filler, 3-5 parts isophthalic acid, 0.02-0.05 parts tetrabutyl titanate and 0.02-0.05 parts triphenyl phosphate; S2: Filler preparation, the raw materials of the filler include cage-type polysilsesquioxane, terminal epoxy hyperbranched polyester, additives, tetrahydrofuran, carbon nano-angles, boron nitride nanosheets and p-hydroxybenzoic acid; S3: Raw material pretreatment, pretreatment of polyethylene terephthalate chips and fillers in the raw materials, ready for use; S4: Blending process, the pretreated polyethylene terephthalate chips, fillers and other raw materials are mixed and fed into a melt spinning machine, then cooled, cured and stretched to obtain the base material; S5: Twisting treatment, the base material is twisted to obtain single-ply yarn; S6: Plitting process, multiple single-ply yarns are plied together to obtain composite yarn; S7: Curing and weaving treatment, which involves curing and weaving composite yarns to produce a high-strength traction rope.

2. The method for producing a high-strength wire traction rope according to claim 1, characterized in that, The filler is prepared as follows: cage-type polysilsesquioxane, terminal epoxy-terminated hyperbranched polyester, additives, and tetrahydrofuran are added to a mixer and stirred at 200-300 rpm for 10-20 min. Then, ultrasonic dispersion is performed at 300-500 W for 20-40 min. Carbon nanoparticles are added and stirred at 200-300 rpm for 10-20 min at 60-65°C. Boron nitride nanosheets and p-hydroxybenzoic acid are added, and the temperature is raised to 110-120°C. The mixture is stirred at 200-300 rpm for 40-50 min. The resulting product is then freeze-dried to obtain the filler.

3. The method for producing a high-strength traction rope according to claim 2, characterized in that, The mass ratio of cage-type polysilsesquioxane, terminal epoxy-terminated hyperbranched polyester, additives, and tetrahydrofuran is 100:50-60:20-30:300-400. The mass of carbon nanoparticles is 40-50% of the mass of cage-type polysilsesquioxane, the mass of boron nitride nanosheets is 30-40% of the mass of cage-type polysilsesquioxane, and the mass of p-hydroxybenzoic acid is 20-30% of the mass of cage-type polysilsesquioxane.

4. The method for producing a high-strength traction rope according to claim 3, characterized in that, The additive is prepared by the following method: polyimide powder, graphene oxide, hydrotalcite and deionized water are added to a mixer and stirred at 60-100 rpm for 10-20 min, followed by ultrasonic dispersion at 300-500 W for 20-40 min. Then, nano-silica, KH550 and anhydrous ethanol are added, and the mixture is refluxed at 60-70°C under nitrogen protection for 6-8 hours. After the reaction is completed, the mixture is cooled, filtered, washed with ethanol, and vacuum dried at 80-90°C for 6-10 h to obtain the additive.

5. The method for producing a high-strength traction rope according to claim 4, characterized in that, The mass ratio of polyimide powder, graphene oxide, hydrotalcite, and deionized water is 100:8-10:15-20:500-600. The mass of nano-silica is 15-20% of the mass of polyimide powder, the mass of KH550 is 5-8% of the mass of polyimide powder, and the mass of anhydrous ethanol is 2-3 times the mass of polyimide powder.

6. The method for producing a high-strength wire traction rope according to claim 1, characterized in that, The method for pretreatment of the raw materials is as follows: polyethylene terephthalate chips are placed in a vacuum drying oven and vacuum dried at 120-140°C and a vacuum degree of -0.09MPa for 4-6 hours. The filler is placed in a drying oven and vacuum dried at 60-80°C and a vacuum degree of -0.08MPa for 2-4 hours to complete the pretreatment of the raw materials.

7. The method for producing a high-strength wire traction rope according to claim 1, characterized in that, The blending process is as follows: pretreated polyethylene terephthalate chips, fillers, and other raw materials are weighed as needed and added to a mixer. The mixture is stirred at 200-400 rpm for 30-40 minutes. The resulting product is fed into a melt spinning machine. The spinning temperature is set to 260-280℃ and the spinning speed is 4000-6000 m / min. The filaments are rapidly cooled and solidified in the spinning channel. Then, 2-3 stages of stretching are performed, with a total stretching ratio of 4-6 times, to obtain the base material.

8. The method for producing a high-strength wire traction rope according to claim 1, characterized in that, The twisting process is as follows: the base material is fed into a twisting machine for twisting to form a single strand of yarn with a twist of 80 to 120 twists / meter.

9. The method for producing a high-strength traction rope according to claim 1, characterized in that, The plying process is as follows: 10 single-ply yarns are plyed twice with the same twist direction through a plying machine to form a multifilament yarn with a linear density of 2500 denier and a plying twist of 55 twists / meter, thus obtaining a composite yarn.

10. The method for producing a high-strength wire traction rope according to claim 1, characterized in that, The curing and weaving process is as follows: the composite yarn is continuously fed into an impregnation tank and impregnated with a polyurethane emulsion with a concentration of 8-12 wt% for 8-10 seconds. Then, it is dried and pre-cured in a hot air drying tunnel at 120-140°C for 2-4 minutes. 18-22 multifilament yarns are woven into a blank by a high-speed weaving machine. The blank is passed through a high-temperature hot air tunnel oven and heat-set at 180-220°C with a tension of 0.5-1.0 cN / dtex for 4-8 minutes. Then, it is post-cured in an oven at 80-100°C for 2-4 hours to obtain a high-strength traction rope.

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