A high wear resistance, high mechanical strength cable sheath material and a method for producing the same

Abstract

The application relates to the technical field of insulating materials, and particularly discloses a cable sheath material with high wear resistance and high mechanical strength and a preparation method thereof. The cable sheath material is obtained by mixing an additive, 100 parts by weight of chlorosulfonated polyethylene, 3-5 parts by weight of a vulcanizing agent and 2-3.5 parts by weight of a vulcanization accelerator, wherein the additive comprises the following components in parts by weight: 10-15 parts of zinc oxide, 15-30 parts of a plasticizer, 5-10 parts of lead stearate, 3-5 parts of an antioxidant, 20-30 parts of a flame retardant, 30-50 parts of white carbon black, 10-15 parts of wollastonite nanotubes and 10-15 parts of talcum powder. The cable sheath material is used in cable production, can fully adapt to the operation conditions of coal mines, reduces the damage of the combined action of internal tension and ground resistance on the cable, prolongs the service life of the cable, and has a good application prospect in the mine cable industry.

Description

Technical Field

[0001] This application relates to the field of insulation materials technology, and more specifically, it relates to a cable sheath material with high wear resistance and high mechanical strength and a method for preparing the same. Background Technology

[0002] Coal is an important fossil fuel and a vital resource for industrial production. Coal mining is primarily conducted through underground operations, and to maximize coal production capacity, high-power mining equipment is commonly used. The cables of these high-power mining equipment frequently rub against the mine walls and are easily impacted by falling rocks, requiring cable sheath materials to possess excellent abrasion resistance and tear resistance.

[0003] Currently, the cables used in high-power coal mining machines mainly use chlorinated polyethylene as the base material for the cable sheath. During the production and processing, vulcanizing agents, vulcanization accelerators, flame retardants, plasticizers, anti-aging agents, flame retardants and other additives are added and then mixed to obtain the cable sheath material. The cable sheath material obtained in this way has a certain resistance to friction from the well wall and impact from falling rocks.

[0004] Regarding the aforementioned technologies, the inventors believe that while the cable sheath materials currently used in high-power coal mining machines offer some resistance to friction from the mine wall and impacts from falling rocks, the coal seam environment during actual construction restricts the operation of the cable-dragging device, necessitating manual cable dragging. During manual cable dragging, if the cable encounters a coal seam with an inclination exceeding 30°, the cable sheath is prone to damage due to the combined effects of internal tension and ground resistance, severely impacting the cable's lifespan. Summary of the Invention

[0005] For cables in related technologies, if they encounter coal seams with an inclination angle exceeding 30° during manual cable dragging, the cable sheath is prone to damage due to the combined effects of internal tension and ground resistance, severely affecting the cable's service life. To improve this defect, this application provides a cable sheath material with high wear resistance and high mechanical strength, and a method for preparing the same.

[0006] In a first aspect, this application provides a cable sheath material with high wear resistance and high mechanical strength, employing the following technical solution:

[0007] A cable sheath material with high wear resistance and high mechanical strength is obtained by mixing additives, 100 parts by weight of chlorosulfonated polyethylene, 3-5 parts by weight of vulcanizing agent, and 2-3.5 parts by weight of vulcanization accelerator. The additives include the following components by weight: 10-15 parts of zinc oxide, 15-30 parts of plasticizer, 5-10 parts of lead stearate, 3-5 parts of antioxidant, 20-30 parts of flame retardant, 30-50 parts of silica, 10-15 parts of wollastonite nanotubes, and 10-15 parts of talc.

[0008] By adopting the above technical solution, compared with related technologies, this application adds wollastonite nanotubes to the additives and changes the base material of the cable sheath material from chlorinated polyethylene to chlorosulfonated polyethylene. The component of wollastonite nanotubes is calcium metasilicate, while the molecules of chlorosulfonated polyethylene contain sulfonic acid groups. There is an electrostatic adsorption relationship between the calcium ions in calcium metasilicate and the sulfonic acid groups in chlorosulfonated polyethylene. Therefore, the wollastonite nanotubes have a certain pulling effect on the molecules of chlorosulfonated polyethylene, thereby reinforcing the chlorosulfonated polyethylene and improving the tear resistance of the cable sheath material. At the same time, wollastonite nanotubes also have good hardness and rigidity, which can reduce scratches on the cable sheath material when it is subjected to friction, thereby improving the wear resistance of the cable sheath material. By using the cable sheath material of this application in cable production, it can be fully adapted to the harsh operating conditions of coal mines. Even when encountering coal seams with an inclination angle greater than 30° during cable towing (this inclination angle refers to the angle between the coal seam surface and the horizontal plane), it can significantly reduce the damage to the cable caused by the combined effects of internal tension and ground resistance, thereby extending the cable's service life. It has good application prospects in the mining cable industry.

[0009] Preferably, the additive also includes a surfactant, wherein the surfactant molecule contains carbon-carbon double bonds.

[0010] By adopting the above technical solution, this application adds a surfactant to the additives, thereby improving the dispersibility of wollastonite nanotubes through adsorption between the surfactant and the nanotubes. After adsorption, the surfactant introduces carbon-carbon double bonds onto the surface of the wollastonite nanotubes. Under the action of the vulcanizing agent, these carbon-carbon double bonds can undergo vulcanization crosslinking with the segments of chlorosulfonated polyethylene, which not only increases the degree of vulcanization crosslinking of chlorosulfonated polyethylene but also improves the bonding between wollastonite nanotubes and chlorosulfonated polyethylene, thus improving the tear resistance of the cable sheath material.

[0011] Preferably, the surfactant comprises sodium oleyl polyoxyethylene ether sulfonate.

[0012] By adopting the above technical solution, the specific type of surfactant was optimized. Sodium oleyl polyoxyethylene ether sulfonate contains sulfonic acid groups in its molecule and belongs to anionic surfactants. Compared with nonionic surfactants, it is easier to adsorb calcium ions on the surface of wollastonite nanotubes. Therefore, it can more fully improve the bonding degree between wollastonite nanotubes and chlorosulfonated polyethylene, and also help to improve the tear resistance of cable sheath material.

[0013] Preferably, the amount of sodium oleyl alcohol polyoxyethylene ether sulfonate used is 2.6-3.4% of the weight of wollastonite nanotubes.

[0014] By adopting the above technical solution, the optimal amount of sodium oleyl alcohol polyoxyethylene ether sulfonate was selected, which helps to save production costs while fully improving the tear resistance and abrasion resistance of cable sheath materials.

[0015] Preferably, the wollastonite nanotubes are prepared according to the following method:

[0016] (1) Sodium silicate and calcium nitrate were added to water to prepare solutions. Then polyethylene glycol was added to the calcium nitrate solution. Next, sodium silicate solution was added dropwise to the calcium nitrate solution. During the dropwise addition, the solution was continuously stirred. After the calcium nitrate solution no longer showed any precipitate, it was filtered. The precipitate obtained by filtration was washed and dried to obtain the nanotube precursor.

[0017] (2) The nanotube precursor, sodium nitrate and anhydrous sodium carbonate are mixed in a weight ratio of 1:5:(0.3-0.5) and then ground to obtain a mixture. The mixture is heated at 350℃ for 2 hours. After the mixture cools down, it is washed until the pH of the washing liquid is 7. The washing residue is dried to obtain wollastonite nanotubes.

[0018] By adopting the above technical solution, this application first uses sodium silicate and calcium nitrate to react and generate calcium metasilicate, thus preparing a nanotube precursor. Then, the nanotube precursor is eroded by sodium carbonate in a sodium nitrate melt, reducing the silica phase on the surface and yielding wollastonite nanotubes with a denser calcium ion distribution. The increased density of calcium ion distribution on the surface of the wollastonite nanotubes allows for the adsorption of more sodium oleyl alcohol polyoxyethylene ether sulfonate molecules, while also improving the bonding between the wollastonite nanotubes and chlorosulfonated polyethylene, thereby improving the tear resistance of the cable sheath material.

[0019] Preferably, the nanotube precursor, sodium nitrate, and anhydrous sodium carbonate are mixed in a weight ratio of 1:5:0.35, and the amount of sodium oleyl alcohol polyoxyethylene ether sulfonate is 3.8% of the weight of the wollastonite nanotubes.

[0020] By adopting the above technical solution, the optimal ratio of nanotube precursor, sodium nitrate, and anhydrous sodium carbonate is selected, which helps to improve the bonding degree between wollastonite nanotubes and chlorosulfonated polyethylene while saving the amount of anhydrous sodium carbonate.

[0021] Preferably, the nanotube precursor, sodium nitrate, and anhydrous sodium carbonate are mixed in a weight ratio of 1:5:0.5, and the amount of sodium oleyl alcohol polyoxyethylene ether sulfonate is 4.2-6.0% of the weight of the wollastonite nanotubes.

[0022] By adopting the above technical solution, this application optimizes the mixing ratio of nanotube precursor, sodium nitrate, and anhydrous sodium carbonate to significantly increase the density of calcium ion distribution on the surface of wollastonite nanotubes. Based on this, the dosage range of sodium oleyl alcohol polyoxyethylene ether sulfonate is further optimized. With the increase in the adsorption capacity of sodium oleyl alcohol polyoxyethylene ether sulfonate, the bonding degree between wollastonite nanotubes and chlorosulfonated polyethylene increases, resulting in a certain improvement in the tear resistance of the cable sheath material.

[0023] Preferably, the amount of sodium oleyl polyoxyethylene ether sulfonate is 6.0% of the weight of wollastonite nanotubes, and the surfactant also includes oleyl polyoxyethylene ether.

[0024] By adopting the above technical solution, this application uses oleyl alcohol polyoxyethylene ether and sodium oleyl alcohol polyoxyethylene ether sulfonate together as surfactants. The structure of oleyl alcohol polyoxyethylene ether is similar to that of sodium oleyl alcohol polyoxyethylene ether sulfonate, both containing carbon-carbon double bonds. However, oleyl alcohol polyoxyethylene ether does not contain sulfonic acid groups and is a nonionic surfactant. When the adsorption of sodium oleyl alcohol polyoxyethylene ether sulfonate reaches near saturation, oleyl alcohol polyoxyethylene ether can insert between adjacent sodium oleyl alcohol polyoxyethylene ether sulfonate molecules, reducing the electrostatic repulsion between sulfonic acid groups and increasing the distribution density of surfactant molecules with double bonds on the surface of wollastonite nanotubes. Both oleyl alcohol polyoxyethylene ether and sodium oleyl alcohol polyoxyethylene ether sulfonate can crosslink with chlorosulfonated polyethylene through double bonds under the action of a vulcanizing agent. Therefore, oleyl alcohol polyoxyethylene ether further increases the bonding degree between wollastonite nanotubes and chlorosulfonated polyethylene, improving the tear resistance and abrasion resistance of the cable sheath material.

[0025] Preferably, the amount of oleyl alcohol polyoxyethylene ether used is 28-36% of the weight of sodium oleyl alcohol polyoxyethylene ether sulfonate.

[0026] By adopting the above technical solution, the optimal amount of oleyl alcohol polyoxyethylene ether was selected, which helps to save production costs while fully improving the tear resistance and abrasion resistance of cable sheath materials.

[0027] Secondly, this application provides a method for preparing a cable sheath material with high wear resistance and high mechanical strength, using the following technical solution.

[0028] A method for preparing a cable sheath material with high wear resistance and high mechanical strength includes the following steps:

[0029] (1) Prepare any of the above-mentioned adjuvants for later use;

[0030] (2) Add chlorosulfonated polyethylene into a mixer and heat it to 70-80℃;

[0031] (3) Add the additives into the internal mixer and mix for 2-3 minutes;

[0032] (4) Add the vulcanizing agent and vulcanization accelerator to the internal mixer and continue mixing for 2-3 minutes. Control the feeding temperature of the internal mixer to 105-110℃. After mixing, you can get a cable sheath material with high wear resistance and high mechanical strength.

[0033] By adopting the above technical solution, the method of this application sequentially feeds chlorosulfonated polyethylene, additives, vulcanizing agents and vulcanization accelerators, and after mixing, obtains a cable sheath material with high wear resistance and high mechanical strength.

[0034] In summary, this application has the following beneficial effects:

[0035] 1. This application uses a combination of chlorosulfonated polyethylene and wollastonite nanotubes. The tensile force between the wollastonite nanotubes and chlorosulfonated polyethylene reinforces the chlorosulfonated polyethylene, improving the tear resistance of the cable sheath material. Simultaneously, the good hardness and rigidity of the wollastonite nanotubes also improve the wear resistance of the cable sheath material. By using the cable sheath material of this application in cable production, it can be fully adapted to the operating conditions of coal mines, reducing the damage to cables caused by the combined effects of internal tension and ground resistance, thus extending the cable's service life. It has promising application prospects in the mining cable industry.

[0036] 2. The preferred additives in this application also include surfactants, whose molecules contain carbon-carbon double bonds. During processing, the surfactants adsorb onto the wollastonite nanotubes, while the carbon-carbon double bonds undergo vulcanization crosslinking with the chlorosulfonated polyethylene. This not only increases the degree of vulcanization crosslinking of the chlorosulfonated polyethylene but also improves the bonding between the wollastonite nanotubes and the chlorosulfonated polyethylene, thereby enhancing the tear resistance and abrasion resistance of the cable sheath material. Detailed Implementation

[0037] The present application will be further described in detail below with reference to the embodiments, preparation examples and comparative examples. The raw materials involved in the present application can all be obtained commercially.

[0038] In the following examples and comparative examples, the chlorosulfonated polyethylene used is Tosoh TS-530 from Japan, and the chlorinated polyethylene is CM352.

[0039] Preparation example of wollastonite nanotubes

[0040] Preparation Examples 1-5

[0041] The following explanation uses Preparation Example 1 as an example.

[0042] Preparation Example 1

[0043] In this preparation example, wollastonite nanotubes were prepared according to the following method:

[0044] (1) Sodium silicate and calcium nitrate were added to water to prepare a 0.5 mol / L solution. Then, polyethylene glycol was added to the calcium nitrate solution to make the mass fraction of polyethylene glycol in the calcium nitrate solution 0.5%. Sodium silicate solution was then added dropwise to the calcium nitrate solution while stirring continuously. After waiting for no more precipitate to appear in the calcium nitrate solution, the solution was filtered. The precipitate obtained by filtration was washed and dried to obtain the nanotube precursor.

[0045] (2) The nanotube precursor, sodium nitrate and anhydrous sodium carbonate were mixed in a weight ratio of 1:5:0.2 and then ground to obtain a mixture. The mixture was heated at 350°C for 2 hours. After the mixture cooled, it was washed until the pH of the washing liquid was 7. The washing residue was dried to obtain wollastonite nanotubes.

[0046] As shown in Table 1, the difference between Preparation Examples 1-5 is that the nanotube precursor, sodium nitrate, and anhydrous sodium carbonate are mixed in different weight ratios (hereinafter referred to as weight ratios).

[0047] Table 1. Weight ratio of nanotube precursor, sodium nitrate, and anhydrous sodium carbonate

[0048] sample Preparation Example 1 Preparation Example 2 Preparation Example 3 Preparation Example 4 Preparation Example 5 weight ratio 1:5:0.2 1:5:0.3 1:5:0.35 1:5:0.4 1:5:0.5

[0049] Example

[0050] Examples 1-5

[0051] The following description uses Example 1 as an example.

[0052] Example 1

[0053] In this embodiment, the vulcanizing agent is BIBP, the vulcanizing aid is TAIC, the plasticizer is chlorinated paraffin (CAS No.: 63449-39-8), the flame retardant is clay (CAS No.: 70131-50-9), the antioxidant is antioxidant RD (CAS No.: 26780-96-1), and the wollastonite nanotubes are commercially available wollastonite nanotubes with an average diameter of 80 nm.

[0054] In this embodiment, the high wear-resistant and high mechanical strength cable sheath material is prepared according to the following steps:

[0055] (1) Mix 10kg zinc oxide, 15kg plasticizer, 5kg lead stearate, 3kg antioxidant, 20kg flame retardant, 30kg silica, 10kg wollastonite nanotubes and 10kg talc to obtain the additives for later use.

[0056] (2) Add 100 kg of chlorosulfonated polyethylene to a mixer and heat it to 75°C;

[0057] (3) Add the additives to the internal mixer and mix for 2 minutes;

[0058] (4) Add 3kg of vulcanizing agent and 2kg of vulcanizing accelerator to the internal mixer and continue mixing for 2 minutes. Control the feeding temperature of the internal mixer to 108℃. After mixing, you can get cable sheath material with high wear resistance and high mechanical strength.

[0059] After obtaining the cable sheath material, the material is turned over using an open mill, rolled into sheets by a three-roll calender, and then stored in a dry drying room.

[0060] As shown in Table 2, the main difference between Examples 1-5 is that the raw material ratios of the cable sheath material are different.

[0061] Table 2 Raw material ratio of cable sheath material

[0062]

[0063] Example 6

[0064] The difference between this embodiment and Embodiment 3 is that the additives also include a surfactant, and the surfactant is oleyl alcohol polyoxyethylene ether (EO=2), and the amount of oleyl alcohol polyoxyethylene ether is 2.2% of the weight of wollastonite nanotubes.

[0065] Example 7

[0066] The difference between this embodiment and Embodiment 6 is that oleyl alcohol polyoxyethylene ether is replaced with sodium oleyl alcohol polyoxyethylene ether sulfonate (EO=2).

[0067] As shown in Table 3, the difference between Examples 7-11 is that the percentage of sodium oleyl polyoxyethylene ether sulfonate used relative to the weight of wollastonite nanotubes (hereinafter referred to as percentage R1) is different.

[0068] Table 3. R1 Percentage

[0069] sample Example 7 Example 8 Example 9 Example 10 Example 11 R1 / % 2.2 2.6 3.0 3.4 3.8

[0070] Example 12

[0071] The difference between this embodiment and Example 11 is that the wollastonite nanotubes are prepared according to the method of Preparation Example 1.

[0072] As shown in Table 4, the difference between Examples 12-16 lies in the different preparation methods of the wollastonite nanotubes.

[0073] Table 4 Examples of Wollastonite Nanotube Preparation

[0074] sample Example 12 Example 13 Example 14 Example 15 Example 16 Preparation Example Preparation Example 1 Preparation Example 2 Preparation Example 3 Preparation Example 4 Preparation Example 5

[0075] Examples 17-20

[0076] As shown in Table 5, the difference between Examples 17-20 and Example 16 is that the percentage of sodium oleyl polyoxyethylene ether sulfonate used relative to the weight of wollastonite nanotubes (hereinafter referred to as percentage R2) is different.

[0077] Table 5. R2 Percentage

[0078]

[0079] Example 21

[0080] The difference between this embodiment and Embodiment 19 is that the surfactant also includes oleyl alcohol polyoxyethylene ether, and the amount of oleyl alcohol polyoxyethylene ether is 25% of the weight of sodium oleyl alcohol polyoxyethylene ether sulfonate.

[0081] As shown in Table 6, the difference between Examples 21-25 is that the percentage of oleyl alcohol polyoxyethylene ether used relative to the weight of sodium oleyl alcohol polyoxyethylene ether sulfonate (hereinafter referred to as percentage R3) is different.

[0082] Table 6. R3 Percentage

[0083]

[0084] Comparative Example

[0085] Comparative Example 1

[0086] The difference between this comparative example and Example 3 is that chlorosulfonated polyethylene is replaced by chlorinated polyethylene by mass, and the additives do not include wollastonite nanotubes.

[0087] Comparative Example 2

[0088] The difference between this comparative example and Example 3 is that the additives do not include wollastonite nanotubes.

[0089] Comparative Example 3

[0090] The difference between this comparative example and Example 3 is that chlorosulfonated polyethylene is replaced by chlorinated polyethylene.

[0091] Performance testing methods

[0092] I. Tear Strength

[0093] The tear strength of the cable sheath material was tested in accordance with JB / T 10696.7-2007 Test Methods for Mechanical and Physical-Chemical Properties of Wires and Cables Part 7: Tear Test. The results are shown in Table 7.

[0094] Table 7 Tear Strength

[0095]

[0096]

[0097] II. Overall Performance

[0098] The cable sheath materials of Example 3 and Comparative Example 1 were subjected to comprehensive performance tests, and the results are shown in Table 8.

[0099] Table 8 Comprehensive Performance Test

[0100]

[0101] As can be seen from Examples 1-5 and Comparative Example 1, and Table 7, the tear strength measured in Examples 1-5 is greater than that in Comparative Example 1. This indicates that the present application, through the combination of chlorosulfonated polyethylene and wollastonite nanotubes, enables electrostatic adsorption between calcium ions in calcium metasilicate and sulfonic acid groups in chlorosulfonated polyethylene, thereby exerting a pulling effect on the molecules of chlorosulfonated polyethylene and improving the tear resistance of the cable sheath material. By using the cable sheath material of this application in cable production, it can be fully adapted to the harsh operating conditions of coal mines, reducing the damage to cables caused by the combined effects of internal tension and ground resistance, thus extending the service life of the cables. It has good application prospects in the mining cable industry.

[0102] As can be seen from Example 3 and Comparative Examples 2-3 and Table 7, when wollastonite nanotubes are not used in conjunction with chlorosulfonated polyethylene, the two cannot generate a pulling effect through electrostatic adsorption, resulting in poor tear resistance of the cable sheath material.

[0103] Based on Examples 3 and 6-7 and Table 7, it can be seen that sodium oleyl polyoxyethylene ether sulfonate can more fully adsorb onto wollastonite nanotubes compared to oleyl polyoxyethylene ether, indicating that electrostatic adsorption results in a better adsorption effect between the anionic surfactant and the wollastonite nanotubes.

[0104] As can be seen from Examples 7-11 and Table 7, increasing the amount of sodium oleyl alcohol polyoxyethylene ether sulfonate has a certain effect on improving tear strength. However, as the amount of sodium oleyl alcohol polyoxyethylene ether sulfonate increases, the growth rate of tear strength decreases, indicating that the adsorption of sodium oleyl alcohol polyoxyethylene ether sulfonate by wollastonite nanotubes gradually approaches saturation and it is difficult to further adsorb more sodium oleyl alcohol polyoxyethylene ether sulfonate.

[0105] Based on Examples 11, 12-16, and Table 7, it can be seen that the tear strength of Examples 12-16 initially showed an increasing trend, then plateaued after Example 14. The relatively low tear strength measured in Example 12 indicates that the calcium ion distribution density on the surface of the wollastonite nanotubes in Preparation Example 1 was relatively low. The tear strength of Examples 15 and 16 did not change significantly compared to Example 14, indicating that sodium oleyl alcohol polyoxyethylene ether sulfonate was almost completely adsorbed in Example 14. Therefore, considering both production cost and actual effect, when the amount of sodium oleyl alcohol polyoxyethylene ether sulfonate was 3.8% of the weight of the wollastonite nanotubes, the wollastonite nanotubes in Preparation Example 3 were able to fully adsorb sodium oleyl alcohol polyoxyethylene ether sulfonate.

[0106] As can be seen from Examples 16, 17-20, and Table 7, further increasing the amount of sodium oleyl alcohol polyoxyethylene ether sulfonate molecules based on Example 16 does not prevent the adsorption of sodium oleyl alcohol polyoxyethylene ether sulfonate by wollastonite nanotubes. This further increases the bonding between wollastonite nanotubes and chlorosulfonated polyethylene, improving the tear resistance of the cable sheath material. However, due to the electrostatic repulsion between sodium oleyl alcohol polyoxyethylene ether sulfonate molecules, the adsorption capacity gradually approaches saturation as the amount of sodium oleyl alcohol polyoxyethylene ether sulfonate increases, limiting the increase in tear strength.

[0107] As can be seen from Examples 19, 21-25 and Table 7, oleyl alcohol polyoxyethylene ether can be inserted between adjacent sodium oleyl alcohol polyoxyethylene ether sulfonate, reducing the repulsion between sulfonic acid groups. When the adsorption of sodium oleyl alcohol polyoxyethylene ether sulfonate reaches saturation, it further increases the distribution density of surfactant on the surface of wollastonite nanotubes, increases the bonding degree between wollastonite nanotubes and chlorosulfonated polyethylene, and improves the tear resistance of cable sheath material.

[0108] 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 cable sheath material with high wear resistance and high mechanical strength, characterized in that, The cable sheath material is obtained by mixing additives, 100 parts by weight of chlorosulfonated polyethylene, 3-5 parts by weight of vulcanizing agent, and 2-3.5 parts by weight of vulcanization accelerator. The additives include the following components by weight: 10-15 parts of zinc oxide, 15-30 parts of plasticizer, 5-10 parts of lead stearate, 3-5 parts of antioxidant, 20-30 parts of flame retardant, 30-50 parts of silica, 10-15 parts of wollastonite nanotubes, and 10-15 parts of talc. The additive also includes a surfactant, the surfactant having carbon-carbon double bonds in its molecules, and the surfactant including sodium oleyl polyoxyethylene ether sulfonate; the amount of sodium oleyl polyoxyethylene ether sulfonate is 2.6-3.4%, 3.8%, or 4.2-6.0% of the weight of the wollastonite nanotubes; The wollastonite nanotubes were prepared according to the following method: (1) Sodium silicate and calcium nitrate were added to water to prepare solutions. Then polyethylene glycol was added to the calcium nitrate solution. Then sodium silicate solution was added dropwise to the calcium nitrate solution. During the dropwise addition, the solution was continuously stirred. After waiting for no more precipitate to appear in the calcium nitrate solution, the solution was filtered. The precipitate obtained by filtration was washed and dried to obtain the nanotube precursor. (2) The nanotube precursor, sodium nitrate and anhydrous sodium carbonate were mixed in a weight ratio of 1:5:(0.3-0.5) and then ground to obtain a mixture. The mixture was heated at 350°C for 2 hours. After the mixture cooled, it was washed until the pH of the washing liquid was 7. The washing residue was dried to obtain wollastonite nanotubes. When the nanotube precursor, sodium nitrate, and anhydrous sodium carbonate are mixed in a weight ratio of 1:5:0.35, the amount of sodium oleyl alcohol polyoxyethylene ether sulfonate used is 3.8% of the weight of the wollastonite nanotubes; When the nanotube precursor, sodium nitrate, and anhydrous sodium carbonate are mixed in a weight ratio of 1:5:0.5, the amount of sodium oleyl alcohol polyoxyethylene ether sulfonate is 4.2-6.0% of the weight of the wollastonite nanotubes; when the amount of sodium oleyl alcohol polyoxyethylene ether sulfonate is 6.0% of the weight of the wollastonite nanotubes, the surfactant also includes oleyl alcohol polyoxyethylene ether, and the amount of oleyl alcohol polyoxyethylene ether is 28-36% of the weight of sodium oleyl alcohol polyoxyethylene ether sulfonate.

2. A method for preparing a cable sheath material with high wear resistance and high mechanical strength, characterized in that, Includes the following steps: (1) Prepare the adjuvant according to claim 1 for later use; (2) Add chlorosulfonated polyethylene into a mixer and heat it to 70-80℃; (3) Add the additives to the internal mixer and mix for 2-3 minutes; (4) Add the vulcanizing agent and vulcanization accelerator to the internal mixer and continue mixing for 2-3 minutes. Control the feeding temperature of the internal mixer to 105-110℃. After mixing, you can get a cable sheath material with high wear resistance and high mechanical strength.

Images