Robot wear-resistant high-temperature aging cable material and its preparation method and application

Abstract

The application relates to a wear-resistant and high-temperature aging-resistant cable material for robots and a preparation method and application thereof. The cable material is combined by introducing nano zinc oxide, a heat-resistant framework, a styrene-N-phenyl maleimide-maleic anhydride terpolymer and a polyurethane elastomer, so that the wear resistance, heat aging resistance, flexibility and mechanical properties of the material are significantly improved. The cable material mainly comprises components such as SEBS, EVA, a polyurethane elastomer, a heat-resistant framework, nano zinc oxide and a terpolymer, and is suitable for a cable sheath material in a robot arm. The application optimizes a material formula and a preparation process, solves the problems of insufficient wear resistance and heat resistance of existing cable materials in a high-temperature and frequent friction environment, and is particularly suitable for harsh working environments such as industrial robots.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of robot wear-resistant aging-resistant cable material, more specifically, the present application has excellent wear resistance, heat aging resistance, heat distortion resistance and the cable material of flexibility and its preparation method and application. BACKGROUND

[0002] In recent years, with the rapid development of industrial robot technology, industrial robots are increasingly widely used in manufacturing, logistics, automobile manufacturing and other fields. As one of the core components of industrial robots, the cable of robot arm needs to withstand frequent bending, stretching, high temperature and friction in complex working environment. Therefore, the cable used in robot arm not only needs to have excellent power and signal transmission capability, but also needs to have good wear resistance, heat resistance, aging resistance and flexibility. Existing cable materials often show poor anti-interference performance, unstable data transmission, poor wear resistance and other problems in complex environments such as high temperature, acid and alkali. Especially in the reciprocating motion of automatic equipment, the friction between the cable and the drag chain can cause the cable to wear out, affecting its service life. In order to improve the wear resistance of the cable, manufacturers usually add inorganic fillers to the cable material, but due to the compatibility problem between inorganic fillers and organic polymer materials (such as rubber), the wear resistance of the material is limited. In addition, polyolefin materials (such as polyethylene, polypropylene) are commonly used as high molecular base materials for cable sheath materials, but polyolefin materials have poor heat resistance and are prone to thermal degradation at high temperatures, limiting their application in high temperature environments.

[0003] In the prior art, the wear resistance and heat resistance of cable materials are mainly improved in the following ways: 1) adding inorganic fillers: in order to improve the wear resistance of the cable, researchers usually add a certain proportion of inorganic fillers such as silicon dioxide, aluminum oxide, etc. in the cable material. However, the compatibility problem between inorganic fillers and organic high polymer materials (such as polypropylene or polyethylene) has always been a technical difficulty. Although inorganic fillers are added, due to the difficulty in achieving good compatibility with high polymer materials, the mechanical wear resistance of the rubber material is not significantly improved. The existence of this problem makes the wear resistance, flexibility and bending resistance of the cable in the actual application of the drag chain still cannot meet the actual requirements. 2) Use of heat-resistant modifiers: in order to improve the heat resistance of the cable material, researchers usually add heat-resistant modifiers such as copper salt, nano zinc oxide, etc. Copper salt can improve the thermal stability of the material by catalyzing crosslinking, capturing free radicals or forming a barrier layer. For example, some metal salts can promote the crosslinking of polymers to form a three-dimensional network structure, thereby enhancing the thermal stability. In addition, copper ions can act as a free radical scavenger to interrupt the degradation process of the polymer chain. While nano zinc oxide as an inorganic nano material, can delay thermal decomposition through physical barrier effect, such as forming a protective layer on the surface of the material, slowing down the penetration of heat and oxygen, or dispersing heat through its high thermal conductivity, reducing local overheating. 3) Adding heat-resistant high polymer materials, in order to improve the comprehensive performance of the cable material, adding polyurethane elastomer, styrene-N-phenyl maleimide-maleic anhydride terpolymer, polyimide and other high polymer materials can improve the wear resistance and heat resistance of the cable sheath material. Although the existing technology has improved the wear resistance and heat resistance of the cable material to a certain extent, however, the existing technology still has the problem of not significantly improving the heat resistance and wear resistance, especially in high temperature and frequent friction environment, the performance of the cable material still cannot meet the demand of industrial robots. Therefore, developing a cable sheath material with excellent wear resistance, heat resistance and flexibility has become an important direction of current industrial robot cable material research.

[0004] In view of the above problems, the present application provides a wear-resistant and high-temperature-resistant cable material for robots and a preparation method thereof. By adding thermoplastic polyurethane, heat-resistant skeleton, nano zinc oxide and styrene-N-phenyl maleimide-maleic anhydride terpolymer in the cable sheath material, the wear resistance, heat resistance and bending resistance of the polyolefin material are significantly improved, especially suitable for cables in robot arms, which can effectively meet the performance requirements in complex motion environment. SUMMARY

[0005] The application aims to solve the problem of poor wear resistance and heat aging resistance of existing polyolefin cable sheath materials, and provides a cable material suitable for robots, which significantly improves the wear resistance, heat resistance, flexibility and mechanical properties of the cable material by introducing the combination of nano zinc oxide, heat-resistant framework, styrene-N-phenyl maleimide-maleic anhydride terpolymer and polyurethane elastomer, and is particularly suitable for cable sheath materials in robot arms.

[0006] The application provides a wear-resistant and high-temperature aging-resistant cable material for robots, which comprises the following raw material components by weight: 100 parts of hydrogenated styrene-butadiene-styrene block copolymer, 30-50 parts of ethylene-vinyl acetate copolymer, 10-20 parts of polyurethane elastomer, 1-5 parts of heat-resistant framework, 10-20 parts of nano zinc oxide, 8-20 parts of styrene-N-phenyl maleimide-maleic anhydride terpolymer, 3-10 parts of compatibilizer, 1-5 parts of antioxidant, 1-5 parts of light stabilizer and 1-5 parts of lubricant.

[0007] Preferably, the heat-resistant framework is an imidazole ester copper-loaded framework, and a synthesis method of the heat-resistant framework comprises the following steps: dropwise adding a benzimidazole aqueous solution into a copper nitrate trihydrate aqueous solution under stirring and continuing to stir to obtain a solid suspension, centrifuging, washing and drying to obtain the heat-resistant framework.

[0008] Preferably, the molar ratio of the copper nitrate trihydrate and the benzimidazole is 1: (10-50).

[0009] Preferably, the content of styrene in the hydrogenated styrene-butadiene-styrene block copolymer is more than 30 wt%.

[0010] Preferably, the content of vinyl acetate in the ethylene-vinyl acetate copolymer is 5-15 wt%, and the melt flow rate under a load of 2.16 kg at 190 DEG C is 0.1-15 g / 10 min.

[0011] Preferably, the polyurethane elastomer is polyether type polyurethane elastomer and polyester type polyurethane elastomer, and the mass ratio of the polyether type polyurethane elastomer and the polyester type polyurethane elastomer is 4-6:4-6.

[0012] Preferably, the average particle size of the nano zinc oxide is 50-200 nm. Preferably, the nano zinc oxide is prepared by surface modification using a coupling agent.

[0013] Preferably, the coupling agent comprises at least one of gamma-aminopropyl triethoxysilane, vinyl triethoxysilane, vinyl trimethoxysilane, gamma-glycidyl ether propyl trimethoxysilane and gamma-methacryloyloxy propyl trimethoxysilane.

[0014] Preferably, the styrene-N-phenyl maleimide-maleic anhydride terpolymer has a mass percentage of N-phenyl maleimide of 15-25% and a mass percentage of maleic anhydride of 8-15%.

[0015] Preferably, the compatilizer is at least one of SEBS-g-MAH, EVA-g-MAH, PE-g-MAH, and PP-g-MAH, and further preferably, the compatilizer is at least one of SEBS-g-MAH and EVA-g-MAH.

[0016] Preferably, the antioxidant of the present application can be any one of antioxidant 1010, antioxidant 1076, antioxidant 168, antioxidant DLTP, antioxidant DSTP, antioxidant 412S, antioxidant 300 or a combination of at least two thereof.

[0017] Preferably, the light stabilizer is at least one of benzotriazole, benzophenone, and triazine, and further preferably at least one of Tinuvin 326, UV-327, UV-328, Chimassorb 81, UV-531, and Cyasorb UV-1164.

[0018] Preferably, the lubricant is one or more of polyethylene wax, stearic acid, stearate, and silicone master batch.

[0019] Preferably, the present application can add colorants, flame retardants, hydrolysis-resistant agents, and other reagents according to actual needs.

[0020] The present application uses SEBS (styrene-butadiene-styrene block copolymer) and EVA (ethylene-vinyl acetate copolymer) as main raw materials, and ingeniously balances the elasticity and rigidity of the material, thereby significantly improving the tensile strength and elongation at break of the cable material. The polar groups contained in EVA not only enhance the mechanical properties of the material, but also help the uniform dispersion of antioxidants, light stabilizers, and heat-resistant agents (such as nano-zinc oxide and styrene-N-phenyl maleimide-maleic anhydride terpolymer) and other additives. The optimization of this dispersion effect further improves the wear resistance and heat resistance of the cable material, so that it can also maintain excellent mechanical properties and stability in harsh environments.

[0021] The imidazole ester copper-loaded framework is selected as the heat-resistant framework. On one hand, the copper ions contained therein can capture the free radicals (such as alkyl radicals R·) generated in the process of thermal degradation of polyolefin at high temperature through redox reaction, thereby interrupting the chain reaction and delaying the thermal oxidative degradation of the material. On the other hand, the heat-resistant framework can adsorb nano zinc oxide, and the nano zinc oxide not only has excellent ultraviolet absorption capacity, but also has good wear resistance, and the adsorption on the heat-resistant framework is beneficial to the dispersion of the nano zinc oxide in the cable material, and further improves the wear resistance and heat resistance of the cable material. In addition, compared with 2-methyl imidazole, 2-ethyl imidazole and other alkyl imidazoles, the present application adopts benzimidazole containing a phenyl group, and the introduction of the phenyl structure makes the heat-resistant framework have more superior heat resistance.

[0022] The present application also adds a styrene-N-phenyl maleimide-maleic anhydride terpolymer, which not only has good heat resistance and can further improve the heat resistance and rigidity of the cable material, but also contains maleic anhydride polar groups, which helps the dispersion of nano zinc oxide in the system. More preferably, the present application uses nano zinc oxide modified by a coupling agent on the surface, and in the molten state, the silane coupling agent on the surface of the nano zinc oxide can undergo a micro-crosslinking reaction with the maleic anhydride comonomer in the terpolymer, and form a physically entangled network structure with the imidazole ester copper-loaded framework adsorbing the nano zinc oxide. This makes the heat resistance, mechanical properties and other comprehensive properties of the cable material more excellent.

[0023] The present application uses a combination of polyether polyurethane elastomer and polyester polyurethane elastomer. The polyester polyurethane elastomer has superior mechanical properties, but its flexibility is slightly inferior. The polyether polyurethane elastomer can still maintain flexibility at low temperature due to the low cohesive energy of the ether bond in the molecular structure and the easy rotation, and has good wear resistance and heat resistance, but its mechanical properties are inferior to those of the polyester polyurethane elastomer. By combining the two in a ratio of 4-6:4-6, the present application ensures that the cable material has good mechanical properties, and also takes into account excellent wear resistance, heat resistance and flexibility.

[0024] The present application also provides a preparation method of a robot wear-resistant and high-temperature aging-resistant cable material, comprising the following steps:

[0025] Mixing the components uniformly in a ratio, melting and extruding in a twin-screw extruder, granulating, drying, and obtaining a robot wear-resistant and high-temperature aging-resistant cable material.

[0026] Preferably, the extrusion temperature of the twin-screw extruder is 180-220℃, the drying temperature is 70-100℃, and the drying time is 1-3h.

[0027] The application also comprises a wear-resistant and high-temperature aging-resistant cable, which comprises a center conductor, an insulation layer, a shielding layer and a sheath layer, wherein the sheath layer is prepared from the wear-resistant and high-temperature aging-resistant cable material of the application.

[0028] Preferably, the application also provides the use of the above-mentioned wear-resistant and high-temperature aging-resistant cable in the field of robots.

[0029] Compared with the prior art, the application has the following beneficial effects:

[0030] The wear-resistant and high-temperature aging-resistant cable material for robots provided by the application not only has excellent wear resistance and heat resistance, but also has excellent mechanical properties such as high tensile strength and elongation at break, and is therefore particularly suitable for cable sheath materials in robot arms. DETAILED DESCRIPTION

[0031] In order to better illustrate the purposes, technical solutions and advantages of the application, the technical solutions of the application will be further described below through specific embodiments. However, the following examples are only simple examples of the application and do not represent or limit the protection scope of the application, and the protection scope of the application is subject to the claims.

[0032] Unless otherwise specified, the materials, reagents and the like used in the following examples and comparative examples are commercially available reagents and materials.

[0033] SEBS-1: polystyrene content of 30wt%, Korten G1654.

[0034] SEBS-2: polystyrene content of 40wt%, Korten A1536.

[0035] SEBS-3: polystyrene content of 50wt%, Asahi Kasei L518.

[0036] SEBS-4: polystyrene content of 60wt%, Korten A1537.

[0037] Styrene-(N-phenyl maleimide)-maleic anhydride terpolymer, HW-320 produced by Shanghai Huawen, with a maleic anhydride content of 10% and a weight percentage content of N-phenyl maleimide of 20%.

[0038] EVA-1: melt flow rate of 2.5g / 10min at 190℃ under a load of 2.16kg, VA content of 12wt%, 3130 DuPont, USA.

[0039] EVA-2: melt flow rate of 10g / 10min at 190℃ under a load of 2.16kg, VA content of 14%, Beijing Organic, EVA 14-2.

[0040] Polyether-based polyurethane elastomer TPU-1: Desmoseal® 1085A, BASF, Germany.

[0041] Polyether-based polyurethane elastomer TPU-2: Desmoseal® 2102-90AE, Dow, USA.

[0042] Polyester-based polyurethane elastomer TPU-3: Desmopan® IT70AU, Bayer, Germany.

[0043] Polyester-based polyurethane elastomer TPU-4: Desmoseal® 5377A, Covestro, Germany.

[0044] Nano-zinc oxide-1: average particle size of 100 nm.

[0045] Nano-zinc oxide-2: average particle size of 200 nm.

[0046] Nano-zinc oxide-3: average particle size of 100 nm, prepared using vinyl triethoxysilane surface modification.

[0047] Nano-zinc oxide-4: average particle size of 100 nm, prepared using γ-aminopropyl triethoxysilane surface modification. Example

[0048] The preparation method of the heat-resistant framework 1 is as follows:

[0049] Step 1), dissolve benzimidazole in water at 70°C to prepare a 0.5 mol / L benzimidazole solution; dissolve copper nitrate trihydrate in water at 50°C to prepare a 0.3 mol / L copper nitrate trihydrate solution;

[0050] Step 2), set the stirring rate to 500 r / min, add the benzimidazole solution to the copper nitrate trihydrate solution at a drop rate of 50 mL / min, continue stirring at 50°C for 4 h to obtain a solid suspension, wash with deionized water 3 times after centrifugation, and dry in a vacuum drying oven at 45°C for 10 h to obtain the heat-resistant framework 1. The molar ratio of copper nitrate trihydrate to benzimidazole is 1:10.

[0051] The preparation method of the heat-resistant framework 2 is as follows:

[0052] Step 1), dissolve benzimidazole in water at 60°C to prepare a 0.2 mol / L benzimidazole solution; dissolve copper nitrate trihydrate in water at 50°C to prepare a 0.4 mol / L copper nitrate trihydrate solution;

[0053] Step 2), set the stirring rate to 800 r / min, drop the benzimidazole solution into the copper nitrate trihydrate solution at a drop rate of 40 mL / min, continue stirring at 50°C for 3 h to obtain a solid suspension, wash with deionized water for 3 times after centrifugation, and dry in a vacuum drying oven at 50°C for 10 h to obtain the heat-resistant skeleton 2. The molar ratio of copper nitrate trihydrate to benzimidazole is 1:30.

[0054] The preparation method of the heat-resistant skeleton 3 is as follows:

[0055] Step 1), dissolve benzimidazole in water at 60°C to prepare a 0.1 mol / L benzimidazole solution; dissolve copper nitrate trihydrate in water at 60°C to prepare a 0.5 mol / L copper nitrate trihydrate solution;

[0056] Step 2), set the stirring rate to 700 r / min, drop the benzimidazole solution into the copper nitrate trihydrate solution at a drop rate of 60 mL / min, continue stirring at 40°C for 4 h to obtain a solid suspension, wash with deionized water for 3 times after centrifugation, and dry in a vacuum drying oven at 50°C for 10 h to obtain the heat-resistant skeleton 3. The molar ratio of copper nitrate trihydrate to benzimidazole is 1:50.

[0057] The preparation method of the heat-resistant skeleton 4 is as follows:

[0058] Step 1), dissolve 2-methylimidazole in water at 70°C to prepare a 0.5 mol / L 2-methylimidazole solution; dissolve copper nitrate trihydrate in water at 50°C to prepare a 0.3 mol / L copper nitrate trihydrate solution;

[0059] Step 2), set the stirring rate to 500 r / min, drop the 2-methylimidazole solution into the copper nitrate trihydrate solution at a drop rate of 50 mL / min, continue stirring at 50°C for 4 h to obtain a solid suspension, wash with deionized water for 3 times after centrifugation, and dry in a vacuum drying oven at 45°C for 10 h to obtain the heat-resistant skeleton 4. The molar ratio of copper nitrate trihydrate to 2-methylimidazole is 1:10.

[0060] The components and weight parts of the wear-resistant and high-temperature aging-resistant cable sheath material for robots involved in the examples and comparative examples are shown in Tables 1-2, wherein the preparation method of the wear-resistant and high-temperature aging-resistant cable sheath material for robots comprises the following steps:

[0061] (1) weigh various raw materials according to the proportion;

[0062] (2) The above raw materials were added into a mixer and mixed uniformly to obtain a mixture; the obtained mixture was added into a double screw extruder for extrusion granulation, and dried at 80℃ for 2h to obtain a cable sheath material, the temperature of the double screw extruder from the feeding section to the die head was 200-210℃, 210-220℃, 210-220℃, 210-220℃, 220℃-230, 220-230℃, 230-240℃, and the screw rotation speed was 200r / min.

[0063] Table 1: Allocation ratio of each component of Examples 1-10 (parts by weight).

[0064] Example 11

[0065] Nano zinc oxide-3 was used instead of nano zinc oxide-1, and other conditions were the same as those in Example 1. Example 12

[0066] Nano zinc oxide-4 was used instead of nano zinc oxide-1, and other conditions were the same as those in Example 1.

[0067] Table 2: Allocation ratio of each component of Comparative Examples 1-10 (parts by weight).

[0068]

[0069] Comparative Example 11.

[0070] 3 parts by weight of copper oxide was used instead of heat-resistant skeleton 1, and other conditions were the same as those in Example 1.

[0071] Performance test

[0072] The robot wear-resistant and high-temperature aging cable sheath material prepared in the examples and comparative examples was subjected to relevant performance tests, and the specific test methods were as follows:

[0073] (1) Wear resistance evaluation

[0074] The mass wear test was carried out according to the standard GB / T 3960-2016 “Plastic sliding friction and wear test method”, and the wear amount was calculated.

[0075] (2) Heat distortion temperature

[0076] Heat distortion temperature: according to the test standard ISO75-2-2013, test condition 1.80MPa.

[0077] (3) Heat aging resistance

[0078] The elongation at break and tensile strength of the sheath layer samples prepared according to the examples and comparative examples were measured after aging at 150℃ for 200 hours, and the change rates of the corresponding tensile strength and elongation at break were calculated, and the average value was calculated for 5 times of testing in each group.

[0079] The calculation method of the change rate

[0080] Tensile strength test: The tensile strength of the polypropylene composition material was tested according to ISO 527-2012 "Plastics - Determination of tensile properties". The tensile rate was 50 mm / min. The change rate of tensile strength = (tensile strength before immersion - tensile strength after immersion) / tensile strength before immersion x 100%.

[0081] Elongation at break: tested according to ISO 527-1-2019: Test conditions: 23℃. The change rate of elongation at break = (elongation at break before immersion - elongation at break after immersion) / elongation at break before immersion x 100%.

[0082] (4) Bending resistance test

[0083] The sample was injection molded into a sample with a length, width and thickness of 100mm*100mm*1.5mm, and was subjected to 180 degree back and forth bending 100 times at 25℃. Whether there was cracking and whitening at the bending part was observed. No cracking and whitening at the bending part was recorded as qualified, and others were recorded as unqualified.

[0084] The performance test results of the examples and comparative examples are shown in Table 3 below:

[0085]

[0086] Through analysis of the performance test results of examples 1-12 and comparative examples 1-11 recorded in Table 3, the following conclusions can be drawn.

[0087] 1. The present application introduces nano zinc oxide, heat-resistant skeleton, styrene-(N-phenyl maleimide)-maleic anhydride terpolymer and polyurethane elastomer into SEBS and EVA substrate, which not only has excellent mechanical properties such as high tensile strength and elongation at break, but also has excellent wear resistance, heat aging resistance and flexibility, especially suitable for cable sheath material in robot arm.

[0088] 2. Comparison between Example 1 and Example 11-12 shows that Example 11-12 uses a silane coupling agent to modify nano zinc dioxide. The cable sheath material prepared in Example 11-12 is significantly better than that in Example 1 in terms of wear resistance, heat aging resistance, heat deformation temperature and flexibility. This may be because in the molten state, the silane coupling agent on the surface of the nano zinc oxide can undergo a micro-crosslinking reaction with the maleic anhydride comonomer in the terpolymer, and form a physically entangled network structure with the imidazole ester copper-loaded skeleton adsorbing the nano zinc oxide, which makes the overall performance of the cable sheath material more excellent.

[0089] 3. Comparing Example 1 with Comparative Example 1 reveals that while Comparative Example 1 uses 2-methylimidazole instead of the benzimidazole in Example 1, while meeting the bending resistance requirements, there are differences in heat resistance. The phenyl-containing benzimidazole structure in Example 1 enhances the heat resistance of the heat-resistant skeleton. In contrast, the heat-resistant skeleton in Comparative Example 1 lacks a benzene ring and readily decomposes at high temperatures, causing the loaded heat-resistant agent, such as nano-zinc oxide, to aggregate within the polymer system, thereby reducing heat aging resistance and heat deformation temperature.

[0090] Comparing Example 1 with Comparative Examples 2-5, it can be seen that Example 1 uses a combination of polyether polyurethane elastomer and polyester polyurethane elastomer, with a mass ratio of approximately 1:1 (4-6:4-6). This mass ratio ensures the material's mechanical properties while also taking into account its flexibility and wear resistance, fully leveraging the respective advantages of the polyether polyurethane elastomer and polyester polyurethane elastomer. Comparative Examples 2-5, on the other hand, do not use this mass ratio or use a single type of polyurethane elastomer, resulting in a significant decrease in the material's flexibility and flexural resistance.

[0091] 4. Comparing Example 1 with Comparative Examples 6-7 reveals that in Comparative Example 6, the excessive amount of heat-resistant skeleton causes the skeleton particles to easily aggregate within the composite material, forming agglomerates that serve as thermal stress concentration points. This makes the material more susceptible to microcracks in high-temperature environments, ultimately leading to a decrease in the composite material's heat resistance and thermal aging resistance. In Comparative Example 7, the insufficient amount of heat-resistant skeleton prevents the heat-resistant nano-zinc oxide filler from being well dispersed within the skeleton, resulting in poor nano-zinc oxide dispersibility. This, in turn, reduces the heat aging resistance and thermal transition temperature of the cable sheath material.

[0092] The comparison of Example 1 and Comparative Examples 8-10 shows that Comparative Example 8 omits nano-zinc oxide, Comparative Example 9 omits heat-resistant skeleton, and Comparative Example 10 omits styrene-(N-phenyl maleimide)-maleic anhydride terpolymer. The heat distortion temperature and the retention rate of the change rate of tensile strength and the change rate of elongation at break after heat treatment of Comparative Examples 8-10 significantly decrease, i.e., the combination of nano-zinc oxide, heat-resistant skeleton and styrene-(N-phenyl maleimide)-maleic anhydride terpolymer significantly improves the heat resistance of the cable sheath material.

[0093] Comparative Example 11 uses copper oxide instead of imidazole ester copper-loaded skeleton. Although copper oxide can provide better heat distortion temperature to some extent, it has poor dispersibility in the composite material and cannot be used as a carrier for nano-zinc oxide, which also leads to poor dispersibility of nano-zinc oxide in the composite material system, and thus the retention rate of tensile strength and elongation at break and the wear resistance of the material after high-temperature aging significantly decrease.

[0094] The above examples are only examples provided to illustrate the present application and are not intended to limit the possible embodiments of the present application. Based on the disclosure of the present application, those skilled in the art can make various modifications and adjustments. It is not necessary or possible to list all possible embodiments. Any modification, equivalent replacement or improvement made within the basic principles and scope of the present application should be considered as falling within the scope of the present application.

Claims

1. A robot wear-resistant high-temperature aging cable material, characterized in that, The cable material comprises the following raw materials by weight: 100 parts of hydrogenated styrene-butadiene-styrene block copolymer, 30-50 parts of ethylene-vinyl acetate copolymer, 10-20 parts of polyurethane elastomer, 1-5 parts of heat-resistant framework, 10-20 parts of nano zinc oxide, 8-20 parts of styrene-N-phenyl maleimide-maleic anhydride terpolymer, 3-10 parts of compatibilizer, 1-5 parts of antioxidant, 1-5 parts of light stabilizer, and 1-5 parts of lubricant. The polyurethane elastomer is a polyether type polyurethane elastomer and a polyester type polyurethane elastomer, and the mass ratio of the polyether type polyurethane elastomer to the polyester type polyurethane elastomer is 4-6:4-6. The synthesis method of the heat-resistant framework comprises the following steps: dropwise adding an aqueous solution of benzimidazole into an aqueous solution of copper nitrate trihydrate under stirring and continuing to stir to obtain a solid suspension, centrifuging, washing, and drying to obtain the heat-resistant framework.

2. The wear and high temperature resistant aging cable material for robots according to claim 1, characterized in that, The molar ratio of the copper nitrate trihydrate to the benzimidazole is 1:(10-50).

3. The wear and high temperature resistant cable compound for robots as claimed in claim 1 wherein, The content of styrene in the hydrogenated styrene-butadiene-styrene block copolymer is 30 wt% or more; the mass percentage of N-phenyl maleimide in the styrene-N-phenyl maleimide-maleic anhydride terpolymer is 15-25%, and the mass percentage of maleic anhydride is 8-15%; the content of vinyl acetate in the ethylene-vinyl acetate copolymer is 5-15 wt%, and the melt flow rate under a load of 2.16 kg at 190℃ is 0.1-15 g / 10 min.

4. The robot wear and high temperature resistant cable material of claim 1, wherein, The average particle size of the nano zinc oxide is 50-200 nm.

5. The wear and high temperature resistant cable compound for robots according to any one of claims 1 to 4, characterized in that, The nano zinc oxide is prepared by surface modification using a coupling agent, and the coupling agent comprises at least one of γ-aminopropyl triethoxysilane, vinyl triethoxysilane, vinyl trimethoxysilane, γ-glycidyl ether propyl trimethoxysilane, and γ-methacryloyloxy propyl trimethoxysilane.

6. The wear and high temperature resistant aging cable material for robots according to claim 1, wherein, The compatibilizer is at least one of SEBS-g-MAH, EVA-g-MAH, PE-g-MAH, and PP-g-MAH.

7. The robot wear and high temperature resistant cable material of claim 1, wherein, The antioxidant is any one or a combination of at least two of antioxidant 1010, antioxidant 1076, antioxidant 168, antioxidant DLTP, antioxidant DSTP, antioxidant 412S, and antioxidant 300; the light stabilizer is at least one of benzotriazole, benzophenone, and triazine; and the lubricant is at least one of polyethylene wax, stearic acid, stearate, and silicone master granules.

8. A process for the preparation of a wear and high temperature resistant cable compound for robots as claimed in any one of claims 1 to 7, characterized in that, The method comprises the following steps: The components are uniformly mixed in proportion, melt-extruded in a double-screw extruder, granulated, dried, and obtained is the wear-resistant and high-temperature aging cable material for robots.

9. The method for preparing the wear-resistant, high-temperature and aging-resistant cable material for robots according to claim 8, characterized in that: The extrusion temperature of the double-screw extruder is 180-220℃, the drying temperature is 70-100℃, and the drying time is 1-3 h.

10. A wear and high temperature resistant cable for robots, characterized in that The cable comprises a center conductor, an insulation layer, a shielding layer, and a sheath layer, and the sheath layer is prepared from the wear-resistant and high-temperature aging cable material according to any one of claims 1-7.

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