A wear-resistant cable chain and its preparation method

Abstract

This application relates to the field of cable chain processing technology, and more specifically, to a wear-resistant cable chain and its preparation method, which is prepared from the following raw materials in weight percentages: 80-85% thermoplastic polyurethane, 4.5-11.5% flame retardant, 3-5% rubber carbon black, 1-2% antioxidant, 0.5-1% lubricant, 0.1-0.5% UV stabilizer, and 0.1-0.5% silicone masterbatch. The wear-resistant cable chain prepared by the above formula has good wear resistance, reduces wear under long-term or high-intensity use, and extends its service life. At the same time, the flame retardant, antioxidant, UV stabilizer, and other additives in the formula work together to improve the overall performance of the cable chain material, such as flame retardancy, weather resistance, and aging resistance, making the cable chain safer and more reliable.

Description

Technical Field

[0001] This application relates to the field of cable chain processing technology, and more specifically, to a wear-resistant cable chain and its preparation method. Background Technology

[0002] The main functions of cable chains include protecting cables, oil pipes, and air pipes from external environmental influences such as friction, collisions, and pulling, thereby reducing the risk of wear, breakage, and damage. By orderly arranging cables and pipes inside the cable chain, it also improves the stability and reliability of equipment, avoiding malfunctions and safety hazards caused by cable tangling or crossing.

[0003] The main material for cable chains in the existing technology is thermoplastic polyurethane. The main reason is that thermoplastic polyurethane has excellent resilience and fatigue life, can be used in a wide temperature range, and maintains excellent elasticity. This makes TPU cable chains highly adaptable to various dynamic and static bending, tensile, and compressive stresses, ensuring that they can maintain structural integrity and functional reliability under complex and changing working conditions, and reducing the risk of damage or deformation caused by mechanical stress.

[0004] However, despite TPU's excellent performance in many aspects, its abrasion resistance has certain limitations. After prolonged or high-intensity use, the surface layer of the TPU cable chain will gradually wear down. This cumulative effect will inevitably weaken its overall durability and operating efficiency, thus adversely affecting the cable chain's service life and overall performance. Summary of the Invention

[0005] To improve the wear resistance of thermoplastic polyurethane cable chains, this application provides a wear-resistant cable chain and a method for preparing the same.

[0006] Firstly, this application provides a wear-resistant cable chain, employing the following technical solution:

[0007] A wear-resistant cable chain is prepared from the following raw materials by weight percentage:

[0008] Thermoplastic polyurethane 80-85%

[0009] Flame retardant 4.5-11.5%

[0010] 3-5% rubber carbon black

[0011] Antioxidant 1-2%

[0012] Lubricant 0.5-1%

[0013] UV protectant 0.1-0.5%

[0014] Silicone masterbatch 0.1-0.5%;

[0015] The rubber carbon black is composed of rubber carbon black with an average particle size of 20-50 nm and rubber carbon black with an average particle size of 100-200 nm.

[0016] By adopting the above technical solution, the resulting wear-resistant cable chain exhibits excellent wear resistance, reducing wear under long-term or high-intensity use and extending its service life. Simultaneously, the flame retardants, antioxidants, and UV stabilizers in the formula work together to improve the cable chain material's overall performance, including flame retardancy, weather resistance, and anti-aging properties, making the cable chain safer and more reliable.

[0017] Thermoplastic polyurethane (TPU) serves as the base material, providing the essential mechanical properties and elasticity required for cable chains. Its excellent resilience and fatigue life allow TPU cable chains to withstand dynamic and static bending, tensile, and compressive stresses without significant deformation or damage. Rubber carbon black plays a crucial role in improving the wear resistance of the cable chain, enhancing its hardness and tear strength. This ensures that the surface layer maintains high wear resistance even after prolonged or high-intensity use, thus extending the cable chain's service life. Furthermore, rubber carbon black improves the material's anti-aging properties, enhancing the cable chain's durability. The addition of silicone masterbatch further improves the cable chain's wear resistance and lubricity. It enhances the material's elasticity, making the cable chain more flexible and less prone to damage during bending and stretching. Simultaneously, silicone masterbatch improves the cable chain's weather resistance and chemical resistance, maintaining stable performance in various harsh environments. Lubricants play a role in improving processing performance and reducing friction during the cable chain's manufacturing process. They reduce frictional resistance during processing, improving production efficiency. At the same time, lubricant can reduce friction between the cable and the inner wall of the cable chain during use, reduce wear, and improve the sliding performance and wear resistance of the cable chain.

[0018] By mixing rubber carbon black with an average particle size of 20-50nm and 100-200nm, a dense reinforcing network can be formed in the TPU matrix. This not only improves the material's hardness and wear resistance but also enhances the scratch resistance of the cable chain surface. The small-diameter carbon black particles can fill the tiny pores inside the material, reducing the generation of wear particles, while the large-diameter particles help improve the overall mechanical strength and tear resistance.

[0019] Preferably, the weight ratio of the rubber carbon black with an average particle size of 20-50 nm to the rubber carbon black with an average particle size of 100-200 nm is 1:(0.8-1).

[0020] By adopting the above technical solution and optimizing the dosage of the two types of rubber carbon black, the overall mechanical strength and wear resistance of the cable chain are further improved, enabling the cable chain to better resist wear and scratches when subjected to external friction, collision and pulling, thus extending its service life.

[0021] Preferably, the rubber carbon black is modified rubber carbon black, prepared by the following method:

[0022] 1) Mix the oxidant and water, heat to 70-80℃, add rubber carbon black, stir and grind, rinse, filter, dry, and take the filter residue;

[0023] 2) Mix itaconic acid, citric acid, 1,4-butanediol, p-toluenesulfonic acid and DMF, and reflux under nitrogen protection and normal pressure for 2-3 hours. Then reduce the pressure to 1.1-1.3 kPa and continue reflux for 2-3 hours to obtain hyperbranched polyester.

[0024] 3) The filter residue is ultrasonically dispersed in DMF, hyperbranched polyester and p-toluenesulfonic acid are added, and the mixture is stirred at 100-120℃ for 1-2 hours to obtain modified rubber carbon black.

[0025] The optimized surface structure and chemical properties of modified rubber carbon black enable it to resist wear and corrosion more effectively, while improving the overall performance and stability of cable chain materials.

[0026] Modified rubber carbon black, through oxidation treatment and graft modification with hyperbranched polyester, optimizes its surface structure and chemical properties. This optimization enables modified rubber carbon black to more effectively resist wear in cable chain materials, especially under long-term or high-intensity use. Compared with unmodified rubber carbon black, modified rubber carbon black significantly improves the wear resistance of cable chains and extends their service life.

[0027] The introduction of hyperbranched polyester not only improves the abrasion resistance of rubber carbon black but also enhances the overall strength and toughness of the cable chain material. Hyperbranched polyester possesses a unique three-dimensional network structure that allows it to form a tight bond with rubber carbon black, thereby improving the material's tear resistance and impact resistance. This makes the cable chain more stable and reliable under dynamic and static stress, reducing the risk of damage or deformation caused by mechanical stress.

[0028] The weather resistance and chemical resistance of the modified rubber carbon black were improved through oxidation treatment and graft modification with hyperbranched polyester. This allows the cable chain to maintain stable performance in harsh outdoor or chemically corrosive environments, reducing material aging or damage caused by environmental factors.

[0029] Preferably, in step 1), the weight ratio of oxidant to solvent is 1:(10-15);

[0030] In step 2), the weight ratio of itaconic acid, citric acid, 1,4-butanediol, p-toluenesulfonic acid, and DMF is (2.5-3):(2-2.5):(3.5-4):(0.1-0.2):5.

[0031] In step 3), the weight ratio of filter residue, hyperbranched polyester, p-toluenesulfonic acid and DMF is (8-10):(2-3):(0.1-0.2):7.

[0032] In step 1), the weight ratio of oxidant to solvent is set to 1:(10-15). This ratio ensures effective dispersion and reaction of the oxidant in the solvent. An appropriate solvent ratio helps control the rate and extent of the oxidation reaction, thereby optimizing the surface oxidation degree of the rubber carbon black. Moderate oxidation treatment can improve the activity of the rubber carbon black, making it easier to react chemically with subsequent hyperbranched polyesters, thus improving the performance of the modified rubber carbon black. In step 2), the weight ratio of itaconic acid, citric acid, 1,4-butanediol, p-toluenesulfonic acid, and DMF is set to (2.5-3):(2-2.5):(3.5-4):(0.1-0.2):5. This ratio is crucial for the synthesis of hyperbranched polyesters. Precise raw material proportioning ensures the smooth progress of the polymerization reaction, generating hyperbranched polyesters with specific structures and properties. These hyperbranched polyesters have high molecular weights and unique three-dimensional network structures, providing excellent reinforcement and lubrication effects for modified rubber carbon black. In step 3), the weight ratio of filter residue (i.e., oxidized rubber carbon black), hyperbranched polyester, p-toluenesulfonic acid, and DMF is set to (8-10):(2-3):(0.1-0.2):7. This ratio contributes to the uniform dispersion and effective reaction of the modified rubber carbon black. The appropriate filter residue ratio ensures good dispersion of the rubber carbon black in DMF, while the addition of hyperbranched polyester introduces polyester segments into the surface of the rubber carbon black through chemical bonding, improving its compatibility and reactivity with other materials. p-Toluenesulfonic acid acts as a catalyst, promoting this chemical reaction and ensuring the high performance of the modified rubber carbon black.

[0033] Preferably, the oxidant is potassium permanganate or potassium dichromate.

[0034] Potassium permanganate and potassium dichromate, as strong oxidizing agents, can effectively oxidize the surface of rubber carbon black, introduce hydroxyl oxygen-containing functional groups, enhance the chemical activity of rubber carbon black, and make it easier to react chemically with other compounds.

[0035] Preferably, the UV stabilizer is one of UV-320, UV-326, UV-327 or UV-24.

[0036] By using the aforementioned UV stabilizers, the weather resistance of cable chains can be improved, enabling them to maintain good performance under different climatic conditions. This helps ensure the reliability and stability of rubber products in harsh environments and extends their service life.

[0037] Preferably, the antioxidant is one or a combination of two or more of antioxidant 245, antioxidant 1010, antioxidant 4010, and antioxidant 4020.

[0038] By using the aforementioned antioxidants, the cable chain can be prevented from aging due to oxidation, thus maintaining its original physical and chemical properties, helping to extend the service life of the cable chain, and reducing performance degradation and damage caused by aging. It can also significantly improve the thermal stability of the cable chain, enabling it to maintain good performance in high-temperature environments, helping to ensure the reliability and stability of the cable chain in high-temperature operating environments.

[0039] Preferably, the lubricant is at least one of fatty acid salt, montana wax E wax, and OP wax.

[0040] By using the aforementioned lubricant, the viscosity of thermoplastic polyurethane during processing can be effectively reduced, thereby improving its fluidity. This helps the TPU fill better in the mold, reduces the generation of bubbles and defects, and improves the yield and quality of the cable chain. Simultaneously, the lubricant reduces internal friction within the cable chain, thus slowing down the wear rate on the cable chain surface.

[0041] Preferably, the flame retardant is composed of aluminum hypophosphite, bisphenol A-bis(diphenyl phosphate), and flame retardant in a weight ratio of (3-8):(1-3):(0.1-0.5).

[0042] By adopting the above technical solution, stable flame-retardant performance can be maintained over a wide temperature range. It effectively prevents the combustion and spread of cable chains in both low and high temperature environments. Furthermore, the addition of this flame retardant does not negatively affect the mechanical properties of the cable chain. On the contrary, due to the interaction between the flame retardant and the cable chain matrix, it can also improve the strength and toughness of the cable chain to a certain extent.

[0043] Preferably, the thermoplastic polyurethane is composed of Bayer 9385AU and Bayer 9390AU in a weight ratio of (4-6):(3-5).

[0044] By adopting the above technical solution, a balance between hardness and elasticity is achieved. This balance allows the material to better maintain its shape and performance when subjected to external forces, thereby extending its service life. Simultaneously, it improves the overall wear resistance of the cable chain, enabling it to better maintain its performance in environments of friction and abrasion, reducing wear and damage.

[0045] Secondly, this application provides a method for preparing a wear-resistant cable chain, which adopts the following technical solution:

[0046] A method for preparing a wear-resistant cable chain includes the following preparation steps:

[0047] S1. Mix thermoplastic polyurethane, flame retardant, rubber carbon black, antioxidant, lubricant, silicone masterbatch and UV stabilizer in proportion to obtain a mixture;

[0048] S2. The mixture is melted and extruded at 180-220℃, cooled and shaped, and then solidified to obtain the finished product.

[0049] By adopting the above technical solutions, the produced cable chains have excellent wear resistance, flame retardancy, oxidation resistance and UV resistance, and can be adapted to various scenarios that require high friction, high wear and high strength, such as automated mechanical equipment, CNC machine tools, robots, etc.

[0050] In summary, this application has the following beneficial effects:

[0051] 1. This application prepares wear-resistant cable chains by using thermoplastic polyurethane, rubber carbon black, flame retardants, antioxidants, lubricants, UV stabilizers and silicone masterbatches. This significantly improves the wear resistance, flame retardancy, thermal stability, light stability and overall performance of thermoplastic polyurethane cable chains. It not only extends the service life of the cable chains, but also improves the stability and reliability of the equipment, and reduces failures and safety hazards caused by cable entanglement or crossing. Detailed Implementation

[0052] Example

[0053] The rubber carbon black is MC-10.

[0054] The silicone masterbatch is silicone PA445200.

[0055] The fire-retardant oil was purchased from Guangdong Fantian Technology Co., Ltd., model number FT-709.

[0056] Example 1

[0057] A wear-resistant cable chain is prepared by the following method:

[0058] S1. Mix 800g of thermoplastic polyurethane (Bayer 9385AU), 114g of flame retardant (aluminum hypophosphite), 50g of rubber carbon black, 20g of antioxidant (antioxidant 245), 10g of lubricant (sodium fatty acid), 5g of silicone masterbatch and 1g of UV stabilizer (UV-320) in a certain proportion to obtain a mixture.

[0059] S2. The mixture is melted and extruded at 180°C, cooled and shaped, and then solidified to obtain the finished product.

[0060] Rubber carbon black is composed of rubber carbon black with an average particle size of 20-30 nm and rubber carbon black with an average particle size of 100-130 nm in a weight ratio of 1:1.

[0061] The difference between Examples 2-3 and Example 1 lies in the types and amounts of raw materials used in preparing the wear-resistant cable chain, as well as the experimental parameters. Specific differences are shown in Table 1.

[0062] Table 1. Types, amounts, and experimental parameters of raw materials used in the preparation of wear-resistant cable chains in Examples 1-3.

[0063]

[0064] In Example 2, the rubber carbon black is composed of rubber carbon black with an average particle size of 31-40 nm and rubber carbon black with an average particle size of 131-160 nm in a weight ratio of 1:0.9.

[0065] In Example 3, the rubber carbon black is composed of rubber carbon black with an average particle size of 41-50 nm and rubber carbon black with an average particle size of 161-200 nm in a weight ratio of 1:0.8.

[0066] Example 4

[0067] A wear-resistant cable chain, the difference between this embodiment and Embodiment 1 is that the rubber carbon black is modified rubber carbon black, prepared by the following method:

[0068] 1) Mix 10g of oxidant (potassium permanganate) and 100g of water, heat to 70-80℃, add 50g of rubber carbon black, stir and grind, rinse, filter, dry, and take the filter residue.

[0069] 2) Mix 5g itaconic acid, 4g citric acid, 7g 1,4-butanediol, 0.2g p-toluenesulfonic acid and 10g DMF, and reflux under nitrogen protection and normal pressure for 2h. Reduce the pressure to 1.1kPa and continue reflux for 2h to obtain hyperbranched polyester; 3) Disperse 50g of filter residue ultrasonically in 44g DMF, add 13g of hyperbranched polyester and 1g p-toluenesulfonic acid, and stir at 100℃ for 1h to obtain modified rubber carbon black.

[0070] In step 1), the weight ratio of oxidant to water is 1:10;

[0071] In step 2), the weight ratio of itaconic acid, citric acid, 1,4-butanediol, p-toluenesulfonic acid, and DMF is 2.5:2:3.5:0.1:5.

[0072] In step 3), the weight ratio of filter residue, hyperbranched polyester, p-toluenesulfonic acid, and DMF is 8:2:0.1:7.

[0073] The difference between Examples 5-6 and Example 4 lies in the types and amounts of raw materials used in preparing the modified rubber carbon black, as well as the experimental parameters. Specific differences are shown in Table 2.

[0074] Table 2. Types, dosages, and experimental parameters of raw materials used in the preparation of modified rubber carbon black in Examples 4-6.

[0075]

[0076] Example 7

[0077] A wear-resistant cable chain, the difference between this embodiment and embodiment 1 is that the flame retardant is composed of aluminum hypophosphite, bisphenol A-bis(diphenyl phosphate) and flame retardant oil in a weight ratio of 3:1:0.1.

[0078] Example 8

[0079] A wear-resistant cable chain, the difference between this embodiment and embodiment 4 is that the flame retardant is composed of aluminum hypophosphite, bisphenol A-bis(diphenyl phosphate) and flame retardant oil in a weight ratio of 8:1:0.1.

[0080] Example 9

[0081] A wear-resistant cable chain, the difference between this embodiment and embodiment 1 is that the thermoplastic polyurethane is composed of Bayer 9385AU and Bayer 9390AU in a weight ratio of 4:3.

[0082] Example 10

[0083] A wear-resistant cable chain, the difference between this embodiment and embodiment 4 is that the thermoplastic polyurethane is composed of Bayer 9385AU and Bayer 9390AU in a weight ratio of 4:3.

[0084] Example 11

[0085] A wear-resistant cable chain, the difference between this embodiment and embodiment 7 is that the thermoplastic polyurethane is composed of Bayer 9385AU and Bayer 9390AU in a weight ratio of 6:5.

[0086] Example 12

[0087] A wear-resistant cable chain, the difference between this embodiment and embodiment 7 is that the flame retardant is composed of aluminum hypophosphite and flame retardant oil in a weight ratio of 3:0.1.

[0088] Example 13

[0089] A wear-resistant cable chain, the difference between this embodiment and embodiment 7 is that the flame retardant is composed of aluminum hypophosphite and bisphenol A-bis(diphenyl phosphate) in a weight ratio of 3:1.

[0090] Example 14

[0091] A wear-resistant cable chain, the difference between this embodiment and embodiment 1 is that the weight ratio of rubber carbon black with an average particle size of 20-30nm to rubber carbon black with an average particle size of 100-130nm is 1:2.

[0092] Comparative Example

[0093] Comparative Example 1

[0094] A wear-resistant cable chain, the difference between this comparative example and Example 1 is that silica is used instead of rubber carbon black.

[0095] Comparative Example 2

[0096] A wear-resistant cable chain, the difference between this comparative example and Example 1 is that talc is used instead of silicone masterbatch.

[0097] Comparative Example 3

[0098] A wear-resistant cable chain, the difference between this comparative example and Example 1 is that the average particle size of the rubber carbon black is 20-30 nm.

[0099] Comparative Example 4

[0100] A wear-resistant cable chain, the difference between this comparative example and Example 1 is that the average particle size of the rubber carbon black is 100-130nm.

[0101] Comparative Example 5

[0102] A wear-resistant cable chain, the difference between this comparative example and Example 1 is that the rubber carbon black is composed of rubber carbon black with an average particle size of 20-30nm and rubber carbon black with an average particle size of 50-70nm in a weight ratio of 1:1.

[0103] Detection methods / test methods

[0104] Abrasion resistance test: Tested in accordance with ISO 4649:2017.

[0105] Tensile strength, elongation at break and flame retardancy rating: tested according to GB / T1040 standard.

[0106] Aging performance test: The wear-resistant cable chains prepared in Examples 1-14 and Comparative Examples 1-5 were placed in an environment at 150°C and irradiated with ultraviolet light. After standing for one week, the wear resistance test was conducted. The experimental data are shown in Table 3:

[0107] Table 3. Experimental data of Examples 1-14 and Comparative Examples 1-5

[0108]

[0109] Comparing Example 1 and Comparative Examples 1-2, Comparative Examples 1-2 showed a larger wear volume in the abrasion resistance test than Example 1; Comparative Example 2 showed an increased wear volume after the anti-aging test; the tensile strength of Comparative Example 2 was lower than that of Example 1; and the elongation at break of Comparative Examples 1-2 was lower than that of Example 1. This indicates that by adding appropriate amounts of rubber carbon black and silicone masterbatch in this application, it is beneficial to improve the wear resistance, anti-aging performance, tensile strength, and elongation at break of the cable chain.

[0110] Comparing Example 1 and Comparative Examples 3-5, Comparative Examples 3-5 showed a larger wear volume in the abrasion resistance test than Example 1; the tensile strength of Comparative Examples 3-5 was lower than that of Example 1; and the elongation at break of Comparative Examples 3-5 was lower than that of Example 1. This indicates that optimizing the average particle size and dosage of rubber carbon black is beneficial to improving the abrasion resistance, tensile strength, and elongation at break of the cable chain.

[0111] Compared with Examples 1, Examples 4-6 showed that the wear volume of Examples 4-6 was smaller than that of Examples 1 in the abrasion resistance test; the wear volume change of Examples 4-6 was reduced after the anti-aging test; the tensile strength of Examples 4-6 was higher than that of Examples 1, and the elongation at break of Examples 4-6 was higher than that of Examples 1. This indicates that the modified rubber carbon black prepared by this application can improve the wear resistance, anti-aging performance, tensile strength and elongation at break of the cable chain.

[0112] Comparing Example 1 and Example 7, Example 7 showed a smaller wear volume in the abrasion resistance test than Example 1; Example 7 also showed higher tensile strength and higher elongation at break than Example 1.

[0113] Compared with Example 4, Example 8 showed a smaller wear volume in the abrasion resistance test than Example 4; the tensile strength of Example 8 was higher than that of Example 4, and the elongation at break of Example 8 was also higher than that of Example 4.

[0114] Comparing Example 7 and Examples 12-13, the flame retardant rating of Examples 12-13 is lower than that of Example 7;

[0115] Examples 1, 4, 7-8, and 12-13 show that by using aluminum hypophosphite, bisphenol A-bis(diphenyl phosphate), and fire retardant in a specific ratio, the wear resistance, tensile strength, elongation at break, and anti-aging properties of the cable chain can be improved.

[0116] Comparing Examples 1 and 14, Example 1 showed a smaller wear volume in the abrasion resistance test than Example 14; Example 1 showed a reduced change in wear volume after the anti-aging test; Example 1 had a higher tensile strength and higher elongation at break than Example 14. This indicates that by optimizing the amount of rubber carbon black with an average particle size of 20-30 nm and rubber carbon black with an average particle size of 100-130 nm, the wear resistance, tensile strength, and elongation at break of the cable chain can be improved.

[0117] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A wear-resistant cable chain, characterized in that, It is prepared from the following raw materials by weight percentage: Thermoplastic polyurethane 80-85% Flame retardant 4.5-11.5% 3-5% rubber carbon black Antioxidant 1-2% Lubricant 0.5-1% UV protectant 0.1-0.5% Silicone masterbatch 0.1-0.5%; The rubber carbon black is composed of rubber carbon black with an average particle size of 20-50 nm and rubber carbon black with an average particle size of 100-200 nm. The thermoplastic polyurethane is composed of Bayer 9385AU and Bayer 9390AU in a weight ratio of (4-6):(3-5); The weight ratio of the rubber carbon black with an average particle size of 20-50 nm to the rubber carbon black with an average particle size of 100-200 nm is 1:(0.8-1).

2. The wear-resistant cable chain according to claim 1, characterized in that: The rubber carbon black is a modified rubber carbon black, prepared by the following method: 1) Mix the oxidant and water, heat to 70-80℃, add rubber carbon black, stir and grind, rinse, filter, dry, and take the filter residue; 2) Mix itaconic acid, citric acid, 1,4-butanediol, p-toluenesulfonic acid and DMF, and reflux under nitrogen protection and normal pressure for 2-3 hours. Then reduce the pressure to 1.1-1.3 kPa and continue reflux for 2-3 hours to obtain hyperbranched polyester. 3) The filter residue is ultrasonically dispersed in DMF, hyperbranched polyester and p-toluenesulfonic acid are added, and the mixture is stirred at 100-120℃ for 1-2 hours to obtain modified rubber carbon black.

3. The wear-resistant cable chain according to claim 2, characterized in that, In step 1), the weight ratio of oxidant to solvent is 1:(10-15); In step 2), the weight ratio of itaconic acid, citric acid, 1,4-butanediol, p-toluenesulfonic acid, and DMF is (2.5-3):(2-2.5):(3.5-4):(0.1-0.2):5; In step 3), the weight ratio of filter residue, hyperbranched polyester, p-toluenesulfonic acid and DMF is (8-10): (2-3): (0.1-0.2):

7.

4. The wear-resistant cable chain according to claim 2, characterized in that: The oxidant is potassium permanganate or potassium dichromate.

5. The wear-resistant cable chain according to claim 1, characterized in that: The UV protectant is one of UV-320, UV-326, UV-327 or UV-24.

6. The wear-resistant cable chain according to claim 1, characterized in that: The antioxidant is one or more of antioxidant 245, antioxidant 1010, antioxidant 4010, and antioxidant 4020.

7. The wear-resistant cable chain according to claim 1, characterized in that: The lubricant is at least one of fatty acid salts, montana wax, E wax, and OP wax.

8. The wear-resistant cable chain according to claim 1, characterized in that: The flame retardant is composed of aluminum hypophosphite, bisphenol A-bis(diphenyl phosphate), and flame retardant in a weight ratio of (3-8):(1-3):(0.1-0.5); The fire-retardant oil was purchased from Guangdong Fantian Technology Co., Ltd., model number FT-709.

9. A method for preparing a wear-resistant cable chain as described in any one of claims 1-8, characterized in that, The preparation steps include the following: S1. Mix thermoplastic polyurethane, flame retardant, rubber carbon black, antioxidant, lubricant, silicone masterbatch and UV stabilizer in proportion to obtain a mixture; S2. The mixture is melted and extruded at 180-220℃, cooled and shaped, and then solidified to obtain the finished product.

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