A control cable resistant to acid and alkali corrosion and rodent and ant damage

Abstract

The present invention relates to the technical field of cables, and provides a control cable resistant to acid and alkali corrosion and rodent and ant damage, which includes a cable core. The surfaces of 8 cable cores are wound with a polyester tape to form a layer of wound polyester tape layer. The wound polyester tape layer is coated with a copper wire braided layer, and the outer surface of the copper wire braided layer is coated with a sheath layer; the cable core includes a copper conductor and an insulating layer coated on the surface of the copper conductor; the raw materials of the sheath layer include the following components in parts by weight: 45-75 parts of polyvinyl chloride resin, 8-18 parts of ethylene propylene diene monomer rubber, 10-18 parts of filler, 6-12 parts of plasticizer, 20-30 parts of flame retardant, 4-8 parts of stabilizer, 2-4 parts of antioxidant, 1-3 parts of crosslinking agent, 3-5 parts of rodent and ant repellent; the polyvinyl chloride resin includes polyvinyl chloride resin QS-800F and polyvinyl chloride resin QS-1000F. Through the above technical solution, the problem that the sheath layer material of the rodent and ant control cable in the related technology has poor acid and alkali corrosion resistance is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and more specifically, to a control cable resistant to acid and alkali corrosion and rodent and ant damage. Background Art

[0002] In the rapid development of industrial automation and smart grids, control cables, as the core carriers for signal transmission and equipment control, are crucial for their reliability in complex environments. In scenarios such as chemical industry, metallurgy, and underground utility tunnels, cables are constantly challenged by acid and alkali corrosion, biological erosion, etc. Although adding chemical reagents to the control cable sheath layer can prevent the erosion of organisms such as rodents and ants, the poor acid and alkali corrosion resistance of the control cable sheath layer material has become a key technical bottleneck restricting the application of control cables.

[0003] The poor acid and alkali corrosion resistance of the control cable sheath layer material not only affects electrical performance and shortens the service life of the control cable, but also as the sheath layer corrodes and fails, the conductors inside the cable may be exposed, easily leading to electric shock accidents and posing safety hazards. Therefore, it is of great significance to develop an anti-rodent and ant control cable with improved acid and alkali corrosion resistance. Summary of the Invention

[0004] The present invention provides a control cable resistant to acid and alkali corrosion and rodent and ant damage, which solves the problem of poor acid and alkali corrosion resistance of the sheath layer material of the anti-rodent and ant control cable in the related art.

[0005] The technical solution of the present invention is as follows:

[0006] The present invention provides a control cable resistant to acid and alkali corrosion and rodent and ant damage, including a cable core. The surfaces of 8 cable cores are wound with polyester tapes to form a wrapped polyester tape layer. The wrapped polyester tape layer is coated with a copper wire braid layer, and the outer surface of the copper wire braid layer is coated with a sheath layer;

[0007] The cable core includes a copper conductor and an insulating layer coated on the surface of the copper conductor;

[0008] The raw materials of the sheath layer include the following components in parts by weight: 45 - 75 parts of polyvinyl chloride resin, 8 - 18 parts of ethylene propylene diene monomer rubber, 10 - 18 parts of filler, 6 - 12 parts of plasticizer, 20 - 30 parts of flame retardant, 4 - 8 parts of stabilizer, 2 - 4 parts of antioxidant, 1 - 3 parts of crosslinking agent, 3 - 5 parts of rodent and ant repellent;

[0009] The polyvinyl chloride resin includes polyvinyl chloride resin QS - 800F and polyvinyl chloride resin QS - 1000F.

[0010] As a further technical solution, the weight ratio of polyvinyl chloride resin QS - 800F to polyvinyl chloride resin QS - 1000F is 7:4 - 5.

[0011] In the present invention, by adjusting the weight ratio of polyvinyl chloride resin QS-800F and polyvinyl chloride resin QS-1000F to be 7:4 to 5, the acid and alkali corrosion resistance of the control cable resistant to acid and alkali corrosion and rodent and ant damage is further improved. When the weight ratio is greater than 7:4 or less than 7:5, the acid and alkali corrosion resistance is relatively poor;

[0012] In the present invention, the weight ratio of polyvinyl chloride resin QS-800F and polyvinyl chloride resin QS-1000F can be 7:4, 7:4.2, 7:4.3, 7:4.4, 7:4.5, 7:4.6, 7:4.7, 7:4.8, 7:4.9, 7:5.

[0013] As a further technical solution, the raw materials of the filler include molybdenum disulfide and caprolactam.

[0014] In the present invention, molybdenum disulfide has good lubricity and wear resistance, and also has relatively high hardness and chemical stability, which can reduce the frictional loss of the control cable resistant to acid and alkali corrosion and rodent and ant damage during use and improve the mechanical properties of the control cable resistant to acid and alkali corrosion and rodent and ant damage. Caprolactam can improve the compatibility of the filler with other raw materials, make the structure of the sheath layer more uniform and dense, and improve the tensile strength of the control cable resistant to acid and alkali corrosion and rodent and ant damage.

[0015] As a further technical solution, the preparation method of the filler includes the following steps:

[0016] A1. Place molybdenum disulfide in an oxalic acid solution, ultrasonically oscillate, filter, and dry to obtain pretreated molybdenum disulfide;

[0017] A2. Place the pretreated molybdenum disulfide in water, add caprolactam, stir, wash and dry to obtain the filler.

[0018] In the present invention, placing molybdenum disulfide in an oxalic acid solution and ultrasonically oscillating can effectively remove surface impurities, improve its activity, stir with caprolactam in water after filtering and drying, make caprolactam fully combine with the pretreated molybdenum disulfide, improve the performance of the filler, and caprolactam can improve the dispersion of molybdenum disulfide in the polymer matrix, thereby enhancing the filling effect and further improving the tensile strength of the control cable resistant to acid and alkali corrosion and rodent and ant damage.

[0019] As a further technical solution, the weight ratio of molybdenum disulfide and caprolactam is 10:0.3 to 0.5.

[0020] In the present invention, by adjusting the weight ratio of molybdenum disulfide and caprolactam to be 10:0.3 to 0.5, the tensile strength of the control cable resistant to acid and alkali corrosion and rodent and ant damage is further improved. When the weight ratio is outside the range of 10:0.3 to 0.5, the tensile strength is lower than that within the range;

[0021] In the present invention, the weight ratio of molybdenum disulfide to caprolactam can be 10:0.3, 10:0.32, 10:0.34, 10:0.36, 10:0.38, 10:0.40, 10:0.42, 10:0.44, 10:0.46, 10:0.48, 10:0.5.

[0022] As a further technical solution, the mass fraction of the oxalic acid solution is 5% - 10%;

[0023] The weight ratio of the molybdenum disulfide to the oxalic acid solution is 1:1.

[0024] In the present invention, by optimizing the concentration and dosage of oxalic acid, the modification efficiency is improved: 5% - 10% oxalic acid can not only clean molybdenum disulfide but also not damage its layered structure; a weight ratio of 1:1 ensures that molybdenum disulfide is activated as fully as possible. This treatment method increases the active sites of molybdenum disulfide, making the subsequent compounding with caprolactam more sufficient, not easily falling off due to environmental fluctuations, and maintaining the compounding for a long time.

[0025] As a further technical solution, during the ultrasonic oscillation, the frequency is 80 - 120 kHz and the time is 5 - 10 min;

[0026] During the stirring, the temperature is 50 - 70 °C and the time is 6 - 8 h.

[0027] In the present invention, the coordination of ultrasonic and stirring parameters ensures the compounding quality: ultrasonic waves of 80 - 120 kHz quickly peel off the molybdenum disulfide lamellae. An ultrasonic time of 5 - 10 minutes can avoid over - treatment. A stirring temperature of 50 - 70 °C and a time of 6 - 8 h enable caprolactam to diffuse sufficiently, ensuring complete compounding.

[0028] As a further technical solution, the plasticizer includes one or more of dioctyl phthalate, dibutyl phthalate, and diisononyl phthalate.

[0029] In the present invention, the plasticizer can be any one or more of existing conventional plasticizers, and can be one or more of dioctyl phthalate, dibutyl phthalate, diisononyl phthalate, diisodecyl phthalate, dioctyl adipate, dioctyl sebacate, and dibutyl sebacate. Preferably, it is one or more of dioctyl phthalate, dibutyl phthalate, and diisononyl phthalate;

[0030] The plasticizer weakens the intermolecular force by inserting between the polymer chains, reduces the glass transition temperature of the material, enables the sheath to remain soft at low temperatures, avoids brittle fracture, can also reduce the melt viscosity of polyvinyl chloride, improves the processing fluidity, endows the material with flexibility, and avoids brittle fracture at low temperatures.

[0031] As a further technical solution, the flame retardant includes one or both of magnesium hydroxide and zinc borate.

[0032] In the present invention, the flame retardant can be any one or more of existing conventional flame retardants, and can be one or more of magnesium hydroxide, aluminum hydroxide, zirconium hydroxide, tricresyl phosphate, decabromodiphenylethane, antimony trioxide, and zinc borate. Preferably, it is one or both of magnesium hydroxide and zinc borate;

[0033] The flame retardant can inhibit the spread of combustion, reduce the release of toxic gases, and through mechanisms such as heat absorption, oxygen dilution, covering and isolation, or carbonization, improve the oxygen index of the sheath, reduce the fire hazard, reduce the heat release during combustion, and also broaden the application scenarios of the acid and alkali corrosion resistant and rodent and ant proof control cable, meet special requirements such as high temperature resistance, oil resistance, low smoke and halogen-free, and is applicable to fields such as electric power, chemical industry, and medical treatment.

[0034] As a further technical solution, the stabilizer includes calcium stearate, zinc stearate, and zinc methacrylate;

[0035] The weight ratio of calcium stearate, zinc stearate, and zinc methacrylate is 4-6:1:1.

[0036] In the present invention, using a ternary compound of calcium stearate, zinc stearate, and zinc methacrylate as a stabilizer in the polyvinyl chloride sheath layer can achieve multi-dimensional performance optimization. Calcium stearate neutralizes the acidic substances generated by the degradation of polyvinyl chloride and delays material aging; zinc stearate blocks the free radical chain reaction and inhibits discoloration and embrittlement. The two form a double thermal stability barrier. Zinc methacrylate crosslinks to form a network structure at high temperatures, enhancing the toughness and anti-deformation ability of the material, while improving the filler dispersion and making the overall structure of the sheath denser. Under the synergistic action of the three, the processing fluidity of the sheath is significantly improved, reducing jams and defects during the extrusion process, and the surface of the finished product is smoother and more uniform. This system does not contain heavy metals, meets environmental protection standards, and has excellent compatibility with other additives, making it suitable for long-term outdoor use.

[0037] As a further technical solution, the anti-aging agent includes one of anti-aging agent MB and anti-aging agent OD.

[0038] In the present invention, the anti-aging agent can be one or more of any conventional anti-aging agents, and can be one or more of anti-aging agent A, anti-aging agent D, anti-aging agent AW, anti-aging agent RD, anti-aging agent MB, and anti-aging agent OD. Preferably, it is one of anti-aging agent MB and anti-aging agent OD;

[0039] In the present invention, the anti-aging agent can significantly improve the durability and reliability of the material. Firstly, it can provide antioxidant protection. By capturing free radicals, it delays the oxidative degradation of the material, enabling the sheath to maintain flexibility in high-temperature environments and avoid embrittlement and cracking. Secondly, adding the anti-aging agent can resist ultraviolet aging, inhibit yellowing and powdering caused by photo-oxidation reactions, and extend the outdoor service life of the acid and alkali resistant, rat and ant proof control cable. Adding the anti-aging agent can also resist ozone erosion, especially in high-voltage electric fields or humid environments, reducing the damage of ozone to the rubber molecular chain and maintaining the elasticity of the sheath of the acid and alkali resistant, rat and ant proof control cable.

[0040] As a further technical solution, the cross-linking agent includes one of dicumyl peroxide and tert-butyl peroxybenzoate.

[0041] In the present invention, the cross-linking agent can be one or more of any conventional cross-linking agents, and can be one or more of benzoyl peroxide, di-tert-butyl peroxide, triethylenetetramine, dicumyl peroxide, and tert-butyl peroxybenzoate. Preferably, it is one of dicumyl peroxide and tert-butyl peroxybenzoate.

[0042] As a further technical solution, the rat and ant proof agent includes LLS-17 rat proof agent and LLS-07 ant proof agent;

[0043] The weight ratio of the LLS-17 rat proof agent to the LLS-07 ant proof agent is 1:0.3 - 0.5.

[0044] In the present invention, the LLS-17 rat proof agent in the rat and ant proof agent contains capsaicin, which can stimulate the trigeminal nerve and taste receptors of rats, causing burning pain and discomfort. The LLS-07 ant proof agent contains pyrethroid components such as bifenthrin. By interfering with the nervous system of termites, it inhibits their feeding and nesting behaviors, thus preventing the acid and alkali resistant, rat and ant proof control cable from being damaged by rats and ants.

[0045] The present invention also proposes a preparation method of an acid and alkali resistant, rat and ant proof control cable for preparing the acid and alkali resistant, rat and ant proof control cable, including the following steps:

[0046] Mix the raw materials of the sheath layer and extrude them outside the copper wire braid layer of the acid and alkali resistant, rat and ant proof control cable to obtain the acid and alkali resistant, rat and ant proof control cable.

[0047] As a further technical solution, when extruding, the temperature of zone 1 is 140 - 150 °C, the temperature of zone 2 is 160 - 170 °C, and the temperature of zone 3 is 130 - 140 °C.

[0048] In the present invention, during the extrusion process of the polyvinyl chloride sheath layer, a gradient temperature control technology is adopted (the temperature in zone 1 is 140 - 150 °C, the temperature in zone 2 is 160 - 170 °C, and the temperature in zone 3 is 130 - 140 °C). This can achieve the dual optimization of material properties and production efficiency. The low temperature preheating in zone 1 gradually softens the material, avoiding the thermal decomposition of polyvinyl chloride resin due to sudden heat, reducing the loss of heat stabilizer, and at the same time retaining the active components of plasticizer and flame retardant; the high temperature in zone 2 promotes the uniform plasticization of the melt, ensuring the full dispersion of fillers such as molybdenum disulfide, forming a dense structure, and enhancing the acid and alkali corrosion resistance of the sheath; the temperature in zone 3 is lowered to 130 - 140 °C, so that the melt maintains an appropriate viscosity before entering the die head, reducing die swell, improving dimensional accuracy, while reducing the extrusion pressure and extending the service life of the die. This "first rising and then falling" temperature curve effectively balances the material fluidity and structural stability.

[0049] The working principle and beneficial effects of the present invention are as follows:

[0050] In the present invention, by using two different types of polyvinyl chloride resins in combination, the acid and alkali corrosion resistance of the control cable sheath layer material is significantly improved. In the prior art, the technical principle of the acid and alkali corrosion resistance of polyvinyl chloride resin relies on the inherent acid and alkali resistance characteristics of the polyvinyl chloride resin itself, which results in a very limited improvement in the acid and alkali corrosion resistance. Different from the idea in the prior art of using the characteristics of polyvinyl chloride resin itself to improve the acid and alkali corrosion resistance of the material, the present invention also pays attention to the influence of the internal complexity of the material on the acid and alkali corrosion resistance. By using two polyvinyl chloride resins with different degrees of polymerization in combination, taking advantage of the difference in the molecular chain length, the long-chain molecules and short-chain molecules interpenetrate and intertwine with each other, increasing the complexity of the molecular chain packing, thereby improving the compactness inside the control cable sheath layer material, and then slowing down the infiltration of corrosive media and improving the acid and alkali corrosion resistance of the control cable sheath layer. Specific embodiments

[0051] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

[0052] In the following embodiments and comparative examples, the type of ethylene propylene diene monomer rubber is Dow - 4770R, the particle size of molybdenum disulfide is 325 mesh, the LLS - 17 rodent repellent is purchased from Tonglu Leite Biotechnology Co., Ltd., the polyvinyl chloride resin QS - 800F is produced by Qilu Branch of China Petroleum and Chemical Corporation, the polyvinyl chloride resin QS - 1000F is produced by Qilu Branch of China Petroleum and Chemical Corporation, and the polyvinyl chloride resin DG - 700 is produced by Tianjin Dagu Chemical Industry Co., Ltd.

[0053] Example 1

[0054] An acid and alkali resistant, rat and ant proof control cable, comprising a cable core. The surfaces of 8 cable cores are wound with polyester tapes to form a wrapped polyester tape layer. The wrapped polyester tape layer is externally coated with a copper wire braided layer, and the outer surface of the copper wire braided layer is coated with a sheath layer;

[0055] The cable core includes a copper conductor and an insulating layer coated on the surface of the copper conductor;

[0056] The raw materials of the sheath layer include the following components in parts by weight: 75 parts of polyvinyl chloride resin, 18 parts of ethylene propylene diene monomer rubber, 18 parts of molybdenum disulfide, 12 parts of dioctyl phthalate, 30 parts of magnesium hydroxide, 8 parts of stabilizer, 4 parts of antioxidant MB, 3 parts of dicumyl peroxide, 5 parts of rodent and ant proof agent;

[0057] The polyvinyl chloride resin includes polyvinyl chloride resin QS-800F and polyvinyl chloride resin QS-1000F with a weight ratio of 1:1;

[0058] The stabilizer includes calcium stearate, zinc stearate and zinc methacrylate with a weight ratio of 6:1:1;

[0059] The rodent and ant proof agent includes LLS-17 rodent proof agent and LLS-07 ant proof agent with a weight ratio of 1:0.5;

[0060] A preparation method of the acid and alkali resistant, rat and ant proof control cable includes the following steps:

[0061] Mix the raw materials of the sheath layer and extrude them outside the copper wire braided layer of the acid and alkali resistant, rat and ant proof control cable to obtain the acid and alkali resistant, rat and ant proof control cable;

[0062] When extruding, the temperature of the first zone is 150 °C, the temperature of the second zone is 170 °C, and the temperature of the third zone is 140 °C.

[0063] Example 2

[0064] An acid and alkali resistant, rat and ant proof control cable, comprising a cable core. The surfaces of 8 cable cores are wound with polyester tapes to form a wrapped polyester tape layer. The wrapped polyester tape layer is externally coated with a copper wire braided layer, and the outer surface of the copper wire braided layer is coated with a sheath layer;

[0065] The cable core includes a copper conductor and an insulating layer coated on the surface of the copper conductor;

[0066] The raw materials of the sheath layer include the following components in parts by weight: 45 parts of polyvinyl chloride resin, 8 parts of ethylene propylene diene monomer rubber, 10 parts of molybdenum disulfide, 6 parts of dibutyl phthalate, 20 parts of zinc borate, 4 parts of stabilizer, 2 parts of antioxidant OD, 1 part of tert-butyl peroxybenzoate, 3 parts of rodent and ant proof agent;

[0067] The polyvinyl chloride resin comprises polyvinyl chloride resin QS-800F and polyvinyl chloride resin QS-1000F in a weight ratio of 7:2;

[0068] The stabilizer comprises calcium stearate, zinc stearate and zinc methacrylate in a weight ratio of 4:1:1;

[0069] The rodent and ant repellent comprises rodent repellent LLS-17 and ant repellent LLS-07 in a weight ratio of 1:0.3;

[0070] A method for preparing a control cable resistant to acid and alkali corrosion and rodent and ant damage comprises the following steps:

[0071] Mix the raw materials of the sheath layer and extrude them outside the copper wire braided layer of the control cable resistant to acid and alkali corrosion and rodent and ant damage to obtain the control cable resistant to acid and alkali corrosion and rodent and ant damage;

[0072] During extrusion, the temperature of zone 1 is 140 °C, the temperature of zone 2 is 160 °C, and the temperature of zone 3 is 130 °C.

[0073] Example 3

[0074] A control cable resistant to acid and alkali corrosion and rodent and ant damage comprises a cable core. The surfaces of 8 cable cores are wound with a polyester tape to form a layer of wrapped polyester tape layer. The wrapped polyester tape layer is coated with a copper wire braided layer, and the outer surface of the copper wire braided layer is coated with a sheath layer;

[0075] The cable core comprises a copper conductor and an insulating layer coated on the surface of the copper conductor;

[0076] The raw materials of the sheath layer comprise the following components in parts by weight: 60 parts of polyvinyl chloride resin, 14 parts of ethylene propylene diene monomer rubber, 12 parts of molybdenum disulfide, 8 parts of diisononyl phthalate, 25 parts of magnesium hydroxide, 6 parts of stabilizer, 3 parts of antioxidant MB, 2 parts of dicumyl peroxide, 4 parts of rodent and ant repellent;

[0077] The polyvinyl chloride resin comprises polyvinyl chloride resin QS-800F and polyvinyl chloride resin QS-1000F in a weight ratio of 7:3;

[0078] The stabilizer comprises calcium stearate, zinc stearate and zinc methacrylate in a weight ratio of 5:1:1;

[0079] The rodent and ant repellent comprises rodent repellent LLS-17 and ant repellent LLS-07 in a weight ratio of 1:0.4;

[0080] A method for preparing a control cable resistant to acid and alkali corrosion and rodent and ant damage comprises the following steps:

[0081] Mix the raw materials of the sheath layer and extrude them outside the copper wire braided layer of the control cable resistant to acid and alkali corrosion and rodent and ant damage to obtain the control cable resistant to acid and alkali corrosion and rodent and ant damage;

[0082] During extrusion, the temperature of Zone 1 is 145 °C, the temperature of Zone 2 is 165 °C, and the temperature of Zone 3 is 135 °C.

[0083] Example 4

[0084] The difference between this example and Example 3 is only that the weight ratio of polyvinyl chloride resin QS-800F to polyvinyl chloride resin QS-1000F in this example is 7:6.

[0085] Example 5

[0086] The difference between this example and Example 3 is only that the weight ratio of polyvinyl chloride resin QS-800F to polyvinyl chloride resin QS-1000F in this example is 7:4.

[0087] Example 6

[0088] The difference between this example and Example 3 is only that the weight ratio of polyvinyl chloride resin QS-800F to polyvinyl chloride resin QS-1000F in this example is 7:5.

[0089] Example 7

[0090] The difference between this example and Example 6 is only that the molybdenum disulfide in this example is replaced with a filler of equal weight, and the raw materials of the filler include molybdenum disulfide and caprolactam with a weight ratio of 10:0.7;

[0091] The preparation method of the filler includes the following steps:

[0092] A1. Place molybdenum disulfide in an oxalic acid solution with a mass fraction of 10%, ultrasonically oscillate at a frequency of 120 kHz for 5 min, filter, and dry to obtain pretreated molybdenum disulfide;

[0093] A2. Place the pretreated molybdenum disulfide in water, add caprolactam, stir at 70 °C for 6 h, elute and dry to obtain the filler;

[0094] The weight ratio of molybdenum disulfide to the oxalic acid solution is 1:1.

[0095] Example 8

[0096] The difference between this example and Example 7 is only that the raw materials of the filler in this example include molybdenum disulfide and caprolactam with a weight ratio of 5:0.1.

[0097] Example 9

[0098] The difference between this example and Example 7 is only that the raw materials of the filler in this example include molybdenum disulfide and caprolactam with a weight ratio of 10:0.3.

[0099] Example 10

[0100] The difference between this embodiment and Embodiment 7 is only that the raw materials of the filler in this embodiment include molybdenum disulfide and caprolactam with a weight ratio of 10:0.5.

[0101] Comparative Example 1

[0102] The difference between this comparative example and Embodiment 3 is only that the polyvinyl chloride resin in this comparative example is of a single model, and the model is QS-800F.

[0103] Comparative Example 2

[0104] The difference between this comparative example and Embodiment 3 is only that the polyvinyl chloride resin in this comparative example is of a single model, and the model is QS-1000F.

[0105] Comparative Example 3

[0106] The difference between this comparative example and Embodiment 3 is only that the polyvinyl chloride resin in this comparative example includes polyvinyl chloride resin DG-700 and polyvinyl chloride resin QS-1000F, with a weight ratio of 7:3.

[0107] Experimental Example 1

[0108] The sheath layers of the acid and alkali resistant and rat and ant proof control cables prepared in Examples 1-6 and Comparative Examples 1-3 were tested for Shore hardness A according to the method specified in GB / T 2411 "Plastics and hard rubber - Determination of indentation hardness by means of a durometer (Shore hardness)". Then, the sheath layers of the acid and alkali resistant and rat and ant proof control cables were immersed in a sulfuric acid aqueous solution with a mass concentration of 30% for 24 h at room temperature, and the Shore hardness A was tested again; the acid and alkali resistant and rat and ant proof control cables prepared in Examples 1-6 and Comparative Examples 1-3 were immersed in a sodium hydroxide aqueous solution with a mass concentration of 40% for 24 h at room temperature, and the Shore hardness A was tested again. The test results are shown in Table 1.

[0109] Table 1 Test results of Shore hardness

[0110]

[0111] As can be seen from Table 1, the Shore hardness of the sheath layer of the acid and alkali resistant and rat and ant proof control cable after being immersed in the acid solution in the present invention reaches above 61, and the Shore hardness of the sheath layer of the acid and alkali resistant and rat and ant proof control cable after being immersed in the alkali solution reaches above 60. Therefore, in the present invention, by using two kinds of polyvinyl chloride resins of QS-800F and QS-1000F, the two resins produce a synergistic effect, improving the acid and alkali corrosion resistance of the acid and alkali resistant and rat and ant proof control cable.

[0112] Experimental Example 2

[0113] The sheath layers of the acid and alkali resistant, rat and ant proof control cables prepared in Examples 6 to 10 were tested for tensile strength according to the method specified in GB / T 1040.1-2018 Plastics - Determination of tensile properties - Part 1: General principles. The test results are shown in Table 2.

[0114] Table 2 Tensile strength test results

[0115]

[0116] As can be seen from Table 2, in the present invention, the tensile strength of the acid and alkali resistant, rat and ant proof control cables prepared in Examples 7 to 10 reached more than 30.8 MPa. Therefore, in the present invention, the use of caprolactam to compound molybdenum disulfide improved the tensile strength of the acid and alkali resistant, rat and ant proof control cables.

[0117] Experimental Example 3

[0118] The sheath layers of the acid and alkali resistant, rat and ant proof control cables prepared in Examples 1 to 3 were tested for oxygen index according to the method specified in GB / T 2406.1-2008 Plastics - Determination of burning behaviour by oxygen index - Part 1: Guidelines, and then tested for elongation at break according to the method specified in GB / T 1040.1-2018 Plastics - Determination of tensile properties - Part 1: General principles. The test results are shown in Table 3.

[0119] Table 3 Oxygen index and elongation at break test results

[0120]

[0121] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A control cable resistant to acid and alkali corrosion and preventing rats and ants, characterized in that, It includes cable cores. The surfaces of 8 of the cable cores are wound with polyester tapes to form a layer of wrapped polyester tape layer. The wrapped polyester tape layer is externally coated with a copper wire braided layer, and the outer surface of the copper wire braided layer is coated with a sheath layer; The cable core includes a copper conductor and an insulating layer coated on the surface of the copper conductor; The raw materials of the sheath layer include the following components in parts by weight: 45-75 parts of polyvinyl chloride resin, 8-18 parts of ethylene propylene diene monomer rubber, 10-18 parts of filler, 6-12 parts of plasticizer, 20-30 parts of flame retardant, 4-8 parts of stabilizer, 2-4 parts of antioxidant, 1-3 parts of crosslinking agent, 3-5 parts of rodent and ant repellent; The polyvinyl chloride resin includes polyvinyl chloride resin QS-800F and polyvinyl chloride resin QS-1000F; The raw materials of the filler include molybdenum disulfide and caprolactam; The preparation method of the filler includes the following steps: A1. Place molybdenum disulfide in an oxalic acid solution and perform ultrasonic oscillation, filter, and dry to obtain pretreated molybdenum disulfide; A2. Place the pretreated molybdenum disulfide in water, add caprolactam, stir, wash and dry to obtain the filler; The weight ratio of molybdenum disulfide to caprolactam is 10:0.3-0.

5.

2. The control cable resistant to acid and alkali corrosion and preventing rats and ants according to claim 1, characterized in that The weight ratio of polyvinyl chloride resin QS-800F to polyvinyl chloride resin QS-1000F is 7:4-5.

3. The control cable resistant to acid and alkali corrosion and preventing rats and ants according to claim 1, characterized in that, The mass fraction of the oxalic acid solution is 5%-10%; The weight ratio of molybdenum disulfide to the oxalic acid solution is 1:

1.

4. A control cable resistant to acid and alkali corrosion and preventing rats and ants according to claim 1, characterized in that, When performing ultrasonic oscillation, the frequency is 80-120 kHz and the time is 5-10 min; When stirring, the temperature is 50-70 °C and the time is 6-8 h.

5. A control cable resistant to acid and alkali corrosion and preventing rats and ants, as claimed in claim 1, wherein The plasticizer includes one or more of dioctyl phthalate, dibutyl phthalate, and diisononyl phthalate; The flame retardant includes one or two of magnesium hydroxide and zinc borate; The stabilizer includes calcium stearate, zinc stearate, and zinc methacrylate; The antioxidant includes one of antioxidant MB and antioxidant OD; The crosslinking agent includes one of dicumyl peroxide and tert-butyl peroxybenzoate; The rodent and ant repellent includes LLS-17 rodent repellent and LLS-07 ant repellent.

6. The control cable resistant to acid and alkali corrosion and preventing rats and ants according to claim 5, characterized in that The weight ratio of calcium stearate, zinc stearate, and zinc methacrylate is 4-6:1:

1.

7. A control cable resistant to acid and alkali corrosion and preventing rats and ants according to claim 5, characterized in that, The weight ratio of LLS-17 rodent repellent to LLS-07 ant repellent is 1:0.3-0.5.

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