Corrosion-resistant flame-retardant cable and preparation method thereof

Abstract

The invention relates to the technical field of cables, and discloses a corrosion-resistant flame-retardant cable and a preparation method thereof.The preparation method comprises the steps that polyvinyl chloride resin, an ammonium polyphosphate capsule flame retardant, a plasticizer, a stabilizer and a lubricant are mixed, plastifying is conducted in a plastifying mill, compression molding is conducted in a press vulcanizer, and a corrosion-resistant flame-retardant sheath material is obtained. The organosilicone cross-linked polymer in the capsule wall of the capsule flame retardant contains a large number of ester groups, and forms stronger hydrogen-bond interaction with chlorine atoms of polyvinyl chloride, and the interfacial acting force of the organosilicone cross-linked polymer and the chlorine atoms of the polyvinyl chloride is increased, so that the compatibility of the coated ammonium polyphosphate and the polyvinyl chloride becomes good, and good tensile strength can be maintained. The organic silicon polymer in the flame retardant capsule wall has very strong hydrophobicity and corrosion resistance, the water absorption and moisture absorption of ammonium polyphosphate can be reduced, the sheath material still has relatively high tensile strength after being soaked in saline water, and the water resistance, salt resistance and corrosion resistance become better.

Description

Technical Field

[0001] This invention relates to the field of cable technology, specifically to a corrosion-resistant and flame-retardant cable and its preparation method. Background Technology

[0002] Cable sheathing materials primarily serve functions such as protection, insulation, and moisture and water resistance. Polyvinyl chloride (PVC) sheathing materials, in particular, possess excellent oil resistance, acid and alkali corrosion resistance, and flexibility, making them widely used. Although PVC has some flame retardancy, a large amount of plasticizer is usually added to improve the plasticity and flexibility of the PVC sheathing material, which severely affects its flame retardant properties. Therefore, additional flame retardants, such as ammonium polyphosphate, red phosphorus, and aluminum hydroxide, are required.

[0003] Ammonium polyphosphate, as a halogen-free flame retardant, possesses advantages such as high flame retardancy, environmental friendliness, and high thermal stability. However, ammonium polyphosphate has poor compatibility with polymer matrices such as polyvinyl chloride (PVC), and it is highly hygroscopic. Adding it to PVC or similar matrices causes the material to absorb moisture, affecting its mechanical properties and resistance to water and corrosion. Microencapsulation of ammonium polyphosphate is an effective method to solve these problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a corrosion-resistant and flame-retardant cable, solving the problem of poor flame retardancy, water resistance, and corrosion resistance of soft PVC sheathing materials used in cables.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a corrosion-resistant and flame-retardant cable, which is composed of a conductor, an insulation layer, a shielding layer, and a corrosion-resistant and flame-retardant sheath material.

[0006] The preparation method of corrosion-resistant and flame-retardant sheath material is as follows:

[0007] (1) Add alanine ester hydrochloride and sodium hydroxide to ethanol, stir, then add 1,3-bis(3-glycidoxypropyl)-1,1,3,3-tetramethyldisiloxane, stir to react, concentrate under reduced pressure, add water and ethyl acetate, stir, let stand to separate the layers, separate and remove the aqueous phase, concentrate the organic phase under reduced pressure, dry, and obtain the organosilicon monomer. The preparation reaction formula is:

[0008]

[0009] (2) Grind and crush ammonium polyphosphate, add it to acetone, disperse it by ultrasonication, add diamine monomer, organosilicon monomer and isocyanate monomer, stir and then add dibutyltin dilaurate dropwise under nitrogen atmosphere, stir and react, filter and wash with ethanol, dry to obtain ammonium polyphosphate capsule flame retardant.

[0010] (3) Mix polyvinyl chloride resin, ammonium polyphosphate capsule flame retardant, plasticizer, stabilizer and lubricant, plasticize in a plasticizing machine, and mold in a flat vulcanizing machine to obtain corrosion-resistant and flame-retardant sheath material.

[0011] Furthermore, the conductors include copper conductors or aluminum conductors.

[0012] Furthermore, the insulation layer includes a polyvinyl chloride layer or a cross-linked polyethylene layer.

[0013] Furthermore, the shielding layer includes a braided layer of copper wire or tin-plated copper wire.

[0014] Furthermore, the reaction temperature in (1) is 45-55℃ and the reaction time is 5-8h.

[0015] Furthermore, in (1), the ratio of alanine ester hydrochloride, sodium hydroxide, and 1,3-bis(3-glycidoxypropyl)-1,1,3,3-tetramethyldisiloxane is (2.4-2.8) mol:(2.4-2.8) mol:1 mol.

[0016] Furthermore, in (1), alanine ester hydrochloride is methyl 3-aminopropionate hydrochloride or ethyl β-alanine hydrochloride.

[0017] Furthermore, in (2), the reaction temperature is 50-60℃ and the reaction time is 3-4h.

[0018] Furthermore, in (2), the ratio of ammonium polyphosphate, diamine monomer, organosilicon monomer, isocyanate monomer, and dibutyltin dilaurate is (330-450) kg: (75-90) mol: (10-25) mol: (130-150) mol: (0.2-0.3) mol.

[0019] Furthermore, the structural formula of the diamine monomer in (2) is: n is 2-6.

[0020] Furthermore, in (2), the isocyanate monomer is isophorone diisocyanate, toluene diisocyanate or diphenylmethane diisocyanate.

[0021] Furthermore, in (3), the ratio of polyvinyl chloride resin, ammonium polyphosphate capsule flame retardant, plasticizer, stabilizer and lubricant is 100g:(15-30)g:(30-50)g:(3.6-5.2)g:(0.8-1.3)g.

[0022] Furthermore, the plasticizer in (3) includes dioctyl phthalate.

[0023] Furthermore, the stabilizer in (3) includes calcium-zinc stabilizer.

[0024] Furthermore, the lubricant in (3) includes stearic acid and polyethylene wax.

[0025] Furthermore, in (3), the temperature of the plasticizer is 140-150℃.

[0026] Furthermore, in (3), the compression molding process involves first hot pressing at 165-175℃ and 10-15MPa pressure for 7-10 minutes, followed by cold pressing for 3-4 minutes.

[0027] The beneficial technical effects of adopting the above technical solution are as follows: The organosilicon monomer contains multiple ester groups and multiple imino and hydroxyl active polymerization sites, which can undergo cross-linking polymerization with diamine monomers and diisocyanates to form a three-dimensional network structure of organosilicon cross-linked polymer. This forms the capsule wall, effectively encapsulating ammonium polyphosphate to obtain an ammonium polyphosphate capsule flame retardant. This capsule is then blended and plasticized with polyvinyl chloride (PVC), plasticizers, etc., to obtain a corrosion-resistant and flame-retardant sheath material. The organosilicon cross-linked polymer in the capsule wall contains a large number of ester groups, which form stronger hydrogen bonds with the chlorine atoms of PVC. This increases the interfacial force between the two, improving the compatibility of the encapsulated ammonium polyphosphate with PVC, reducing the impact on the mechanical properties of PVC, and thus maintaining good tensile strength.

[0028] The organosilicon polymer in the flame retardant capsule wall of the present invention has strong hydrophobic and corrosion-resistant properties, which can reduce the water and moisture absorption of ammonium polyphosphate. The sheath material still has high tensile strength after being impregnated with salt water, and its water, salt and corrosion resistance is improved.

[0029] The flame retardant of the present invention contains a large number of flame-retardant siloxane structures in its capsule wall, which have a synergistic flame-retardant effect with ammonium polyphosphate, thus improving the flame-retardant performance of the sheath material. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0031] Example 1

[0032] (1) Add 0.56 mol of methyl 3-aminopropionate hydrochloride (CAS No. 3196-73-4) and 0.56 mol of sodium hydroxide to 1 L of ethanol, stir, and then add 0.2 mol of 1,3-bis(3-glycidoxypropyl)-1,1,3,3-tetramethyldisiloxane (CAS No. 126-80-7). Heat to 45 °C, stir and react for 8 h, concentrate under reduced pressure, add water and ethyl acetate, stir and let stand to separate the layers, separate and remove the aqueous phase, concentrate the organic phase under reduced pressure and dry to obtain organosilicon monomer.

[0033] (2) Grind 330g of ammonium polyphosphate into powder, add it to 5L of acetone, ultrasonically disperse for 30min, add 90mmol of ethylenediamine, 10mmol of organosilicon monomer and 130mmol of isophorone diisocyanate, stir, add 0.24mmol of dibutyltin dilaurate dropwise under nitrogen atmosphere, heat to 50℃, stir, reflux and condense for 4h, filter, wash with ethanol, dry, and obtain ammonium polyphosphate capsule flame retardant.

[0034] (3) Mix 2kg of polyvinyl chloride resin, 0.3kg of ammonium polyphosphate capsule flame retardant, 0.6kg of plasticizer dioctyl phthalate, 83g of calcium zinc stabilizer, 13g of stearic acid and 6g of polyethylene wax, and plasticize in a plasticizer at 145℃. Then, in a flat vulcanizing machine, hot press at 170℃ and 10MPa pressure for 10min, cold press for 4min, and mold to obtain corrosion-resistant and flame-retardant sheath material.

[0035] Example 2

[0036] (1) Add 0.48 mol of β-alanine ethyl ester hydrochloride (CAS No. 4244-84-2) and 0.48 mol of sodium hydroxide to 1.2 L of ethanol, stir, add 0.2 mol of 1,3-bis(3-glycidoxypropyl)-1,1,3,3-tetramethyldisiloxane, heat to 55 °C, stir for 5 h, concentrate under reduced pressure, add water and ethyl acetate, stir, let stand to separate the layers, separate and remove the aqueous phase, concentrate the organic phase under reduced pressure, dry, and obtain organosilicon monomer.

[0037] (2) Grind 450g of ammonium polyphosphate into powder, add it to 6L of acetone, sonicate for 20min, add 85mmol of 1,6-hexanediamine, 15mmol of organosilicon monomer and 136mmol of diphenylmethane-4,4'-diisocyanate, stir, add 0.2mmol of dibutyltin dilaurate dropwise under nitrogen atmosphere, heat to 55℃, stir, reflux and condense for 4h, filter, wash with ethanol, dry, and obtain ammonium polyphosphate capsule flame retardant.

[0038] (3) Mix 2kg of polyvinyl chloride resin, 0.4kg of ammonium polyphosphate capsule flame retardant, 0.7kg of plasticizer dioctyl phthalate, 72g of calcium zinc stabilizer, 18g of stearic acid and 8g of polyethylene wax, and plasticize in a plasticizer at 140℃. Then, in a flat vulcanizing machine, hot press at 165℃ and 15MPa pressure for 10min, cold press for 4min, and mold to obtain corrosion-resistant and flame-retardant sheath material.

[0039] Example 3

[0040] (1) Grind 375g of ammonium polyphosphate into powder, add it to 5.5L of acetone, sonicate for 30min, add 80mmol of 1,4-butanediamine, 20mmol of organosilicon monomer (prepared according to the method of Example 1), and 143mmol of toluene-2,4-diisocyanate. After stirring, add 0.3mmol of dibutyltin dilaurate dropwise under a nitrogen atmosphere, heat to 50℃, stir, reflux and condense for 4h, filter, wash with ethanol, and dry to obtain ammonium polyphosphate capsule flame retardant.

[0041] (2) Mix 2kg of polyvinyl chloride resin, 0.5kg of ammonium polyphosphate capsule flame retardant, 0.85kg of plasticizer dioctyl phthalate, 104g of calcium zinc stabilizer, 11g of stearic acid and 5g of polyethylene wax, and plasticize in a plasticizer at 150℃. Then, in a flat vulcanizing machine, hot press at 170℃ and 15MPa pressure for 8min, cold press for 3min, and mold to obtain corrosion-resistant and flame-retardant sheath material.

[0042] Example 4

[0043] (1) Grind 390g of ammonium polyphosphate into powder, add it to 5.5L of acetone, ultrasonically disperse for 30min, add 75mmol of ethylenediamine, 25mmol of organosilicon monomer (prepared according to the method of Example 1), and 150mmol of toluene diisocyanate. After stirring, add 0.28mmol of dibutyltin dilaurate dropwise under a nitrogen atmosphere, heat to 60℃, stir, reflux and condense for 3h, filter, wash with ethanol, and dry to obtain ammonium polyphosphate capsule flame retardant.

[0044] (2) Mix 2kg of polyvinyl chloride resin, 0.6kg of ammonium polyphosphate capsule flame retardant, 1kg of plasticizer dioctyl phthalate, 87g of calcium zinc stabilizer, 15g of stearic acid and 6g of polyethylene wax, and plasticize in a plasticizer at 150℃. Then, in a flat vulcanizing machine, hot press at 170℃ and 10MPa pressure for 10min, cold press for 3min, and mold to obtain corrosion-resistant and flame-retardant sheath material.

[0045] Comparative Example 1 differs from Example 1 in that ammonium polyphosphate is used instead of the ammonium polyphosphate capsule flame retardant.

[0046] (1) Mix 2kg of polyvinyl chloride resin, 0.3kg of ammonium polyphosphate, 0.6kg of plasticizer dioctyl phthalate, 83g of calcium zinc stabilizer, 13g of stearic acid and 6g of polyethylene wax, and plasticize in a plasticizer at 145℃. Then, in a flat vulcanizing machine, hot press at 170℃ and 10MPa pressure for 10min, cold press for 4min, and mold to obtain the sheath material.

[0047] Comparative Example 2 differs from Example 1 in that diethanolamine is used instead of the organosilicon monomer.

[0048] (1) Grind 330g of ammonium polyphosphate into powder, add it to 5L of acetone, ultrasonically disperse for 30min, add 90mmol of ethylenediamine, 10mmol of diethanolamine and 130mmol of isophorone diisocyanate, stir, add 0.24mmol of dibutyltin dilaurate dropwise under nitrogen atmosphere, heat to 50℃, stir, reflux and condense for 4h, filter, wash with ethanol, dry, and obtain ammonium polyphosphate capsule flame retardant.

[0049] (2) Mix 2kg of polyvinyl chloride resin, 0.3kg of ammonium polyphosphate capsule flame retardant, 0.6kg of plasticizer dioctyl phthalate, 83g of calcium zinc stabilizer, 13g of stearic acid and 6g of polyethylene wax, and plasticize in a plasticizer at 145℃. Then, in a flat vulcanizing machine, hot press at 170℃ and 10MPa pressure for 10min, cold press for 4min, and mold to obtain the sheath material.

[0050] Comparative Example 3 differs from Example 1 in that 1,3-bis(4-hydroxybutyl)tetramethyldisiloxane is used instead of the organosilicon monomer.

[0051] (1) Grind 330g of ammonium polyphosphate into powder, add it to 5L of acetone, ultrasonically disperse for 30min, add 90mmol of ethylenediamine, 10mmol of organosilicon monomer and 130mmol of isophorone diisocyanate, stir, add 0.24mmol of dibutyltin dilaurate dropwise under nitrogen atmosphere, heat to 50℃, stir, reflux and condense for 4h, filter, wash with ethanol, dry, and obtain ammonium polyphosphate capsule flame retardant.

[0052] (2) Mix 2kg of polyvinyl chloride resin, 0.3kg of ammonium polyphosphate capsule flame retardant, 0.6kg of plasticizer dioctyl phthalate, 83g of calcium zinc stabilizer, 13g of stearic acid and 6g of polyethylene wax, and plasticize in a plasticizer at 145℃. Then, in a flat vulcanizing machine, hot press at 170℃ and 10MPa pressure for 10min, cold press for 4min, and mold to obtain the sheath material.

[0053] Comparative Example 4 differs from Example 1 in that 1-butanamine is used instead of methyl 3-aminopropionate hydrochloride.

[0054] (1) Add 0.56 mol of 1-butylamine and 0.56 mol of sodium hydroxide to 1 L of ethanol, stir, and then add 0.2 mol of 1,3-bis(3-glycidoxypropyl)-1,1,3,3-tetramethyldisiloxane. Heat to 45 °C and stir for 8 h. Concentrate under reduced pressure, add water and ethyl acetate, stir, and allow to stand for separation. Separate and remove the aqueous phase, concentrate the organic phase under reduced pressure, and dry to obtain an organosilicon monomer with the following structural formula:

[0055] (2) Grind 330g of ammonium polyphosphate into powder, add it to 5L of acetone, ultrasonically disperse for 30min, add 90mmol of ethylenediamine, 10mmol of organosilicon monomer and 130mmol of isophorone diisocyanate, stir, add 0.24mmol of dibutyltin dilaurate dropwise under nitrogen atmosphere, heat to 50℃, stir, reflux and condense for 4h, filter, wash with ethanol, dry, and obtain ammonium polyphosphate capsule flame retardant.

[0056] (3) Mix 2kg of polyvinyl chloride resin, 0.3kg of ammonium polyphosphate capsule flame retardant, 0.6kg of plasticizer dioctyl phthalate, 83g of calcium zinc stabilizer, 13g of stearic acid and 6g of polyethylene wax, and plasticize in a plasticizer at 145℃. Then, in a flat vulcanizing machine, hot press at 170℃ and 10MPa pressure for 10min, cold press for 4min, and mold to obtain the sheath material.

[0057] The flame retardant properties of the sheath material were tested according to the UL-94 method.

[0058] The tensile strength of the sheath material was tested using a universal testing machine. The specimen was dumbbell-shaped, the test temperature was 25℃, the relative humidity was 65%, the tensile load was applied to the specimen along the longitudinal axis, the tensile speed was 10mm / min, the pre-tension of the specimen was 2N, and the clamping distance was 150mm. The testing machine was controlled by a computer and the data was collected.

[0059] The sheath material was placed in a 0.5% sodium chloride solution and completely immersed for 360 hours. After removal, the surface moisture was wiped off, and then the tensile strength was tested.

[0060] Table 1 Performance of Sheathing Material

[0061]

[0062] After testing, the PVC sheath material of Comparative Example 1 had a UL-94 rating of only V-2, and its tensile strength and tensile strength after immersion in salt water were low. Its flame retardancy, mechanical properties and salt corrosion resistance were also poor. This was mainly because the added ammonium polyphosphate had poor compatibility with PVC, which affected the tensile strength of the sheath material. In addition, ammonium polyphosphate has strong water absorption and hygroscopicity, which caused the sheath material to absorb water, resulting in a significant decrease in tensile strength.

[0063] Examples 1-4 utilize organosilicon monomers containing multiple imino and hydroxyl active polymerization sites, as well as ester groups, to undergo cross-linking polymerization with diamine monomers and diisocyanates to form a three-dimensional network structure of organosilicon cross-linked polymer. This serves as the capsule wall, effectively encapsulating ammonium polyphosphate. The organosilicon polymer contains a large number of ester groups, which form stronger hydrogen bonds with the chlorine atoms of polyvinyl chloride (PVC), increasing the interfacial forces between the two. This improves the compatibility between the encapsulated ammonium polyphosphate and PVC, reducing the impact on the mechanical properties of PVC and maintaining good tensile strength. Furthermore, the organosilicon polymer has strong hydrophobic and corrosion-resistant properties, which can reduce the water absorption and hygroscopicity of ammonium polyphosphate. Even after being immersed in salt water, the sheath material still exhibits high tensile strength and high retention rate. The UL-94 rating of the sheath material reaches levels V-1 to V-0, mainly because the capsule wall contains a large number of flame-retardant siloxane structures, which synergistically enhance the flame-retardant effect with ammonium polyphosphate, thus improving the flame-retardant performance of the sheath material.

[0064] The diethanolamine in Comparative Example 2 does not contain ester groups or siloxanes, resulting in a lower ester group content in the prepared capsule wall. This leads to weaker hydrogen bonding with polyvinyl chloride, which is not conducive to improving the compatibility between ammonium polyphosphate and polyvinyl chloride. Consequently, the tensile strength of the sheath material and the tensile strength after immersion in salt water are lower, and the UL-94 rating is only V-2.

[0065] The 1,3-bis(4-hydroxybutyl)tetramethyldisiloxane in Comparative Example 3 contains only two hydroxyl groups. The organosilicon polymer generated by the polymerization reaction with diamine monomers and diisocyanates is difficult to form a three-dimensional network structure, resulting in poor coating effect on ammonium polyphosphate and low tensile strength of the sheath material and low tensile strength after immersion in salt water.

[0066] The organosilicon monomer in Comparative Example 4 does not contain ester groups, resulting in a lower ester group content in the prepared capsule wall. This leads to weaker hydrogen bonding with polyvinyl chloride, which is not conducive to improving the compatibility between ammonium polyphosphate and polyvinyl chloride, resulting in lower tensile strength of the sheath material.

[0067] The present invention also provides the following embodiments.

[0068] Example 5: A corrosion-resistant and flame-retardant cable, which consists of copper conductors, a polyvinyl chloride insulation layer, a tin-copper wire braided layer, and a corrosion-resistant and flame-retardant sheath material (prepared from Example 1).

[0069] Example 6: A corrosion-resistant and flame-retardant cable, which consists of an aluminum conductor, a cross-linked polyethylene layer, a copper wire shielding layer, and a corrosion-resistant and flame-retardant sheath material (prepared from Example 4).

[0070] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant and flame-retardant cable, characterized in that, The cable consists of conductors, insulation layer, shielding layer, and corrosion-resistant and flame-retardant sheath material; The preparation method of the corrosion-resistant and flame-retardant sheath material is as follows: (1) Grind and crush ammonium polyphosphate, add it to acetone, disperse it by ultrasonication, add diamine monomer, organosilicon monomer and isocyanate monomer, stir and then add dibutyltin dilaurate dropwise under nitrogen atmosphere, stir and react, filter, wash and dry to obtain ammonium polyphosphate capsule flame retardant. (2) Mix polyvinyl chloride resin, ammonium polyphosphate capsule flame retardant, plasticizer, stabilizer and lubricant in a ratio of 100g:(15-30)g:(30-50)g:(3.6-5.2)g:(0.8-1.3)g, plasticize in a plasticizing machine, and mold in a flat vulcanizing machine to obtain corrosion-resistant and flame-retardant sheath material.

2. The corrosion-resistant and flame-retardant cable according to claim 1, characterized in that, The reaction temperature in (1) is 50-60℃ and the reaction time is 3-4h.

3. The corrosion-resistant and flame-retardant cable according to claim 1, characterized in that, The ratio of ammonium polyphosphate, diamine monomer, organosilicon monomer, isocyanate monomer, and dibutyltin dilaurate in (1) is (330-450) kg: (75-90) mol: (10-25) mol: (130-150) mol: (0.2-0.3) mol.

4. The corrosion-resistant and flame-retardant cable according to claim 3, characterized in that, The structural formula of the diamine monomer is as follows: n is 2-6.

5. The corrosion-resistant and flame-retardant cable according to claim 3, characterized in that, The isocyanate monomer is isophorone diisocyanate, toluene diisocyanate, or diphenylmethane diisocyanate.

6. The corrosion-resistant and flame-retardant cable according to claim 3, characterized in that, The method for preparing the organosilicon monomer is as follows: alanine ester hydrochloride and sodium hydroxide are added to ethanol, and after stirring, 1,3-bis(3-glycidoxypropyl)-1,1,3,3-tetramethyldisiloxane is added. The mixture is stirred and reacted at 45-55℃ for 5-8 hours, concentrated under reduced pressure, water and ethyl acetate are added, and after stirring, the mixture is allowed to stand and separate into layers. The aqueous phase is removed, the organic phase is concentrated under reduced pressure, and dried to obtain the organosilicon monomer.

7. The corrosion-resistant and flame-retardant cable according to claim 6, characterized in that, The ratio of alanine ester hydrochloride, sodium hydroxide, and 1,3-bis(3-glycidoxypropyl)-1,1,3,3-tetramethyldisiloxane is (2.4-2.8) mol:(2.4-2.8) mol:1 mol; the alanine ester hydrochloride is methyl 3-aminopropionate hydrochloride or ethyl β-alanine hydrochloride.

8. The corrosion-resistant and flame-retardant cable according to claim 1, characterized in that, The plasticizer in (2) includes dioctyl phthalate; the stabilizer includes calcium zinc stabilizer; and the lubricant includes stearic acid and polyethylene wax.

9. The corrosion-resistant and flame-retardant cable according to claim 1, characterized in that, The temperature of the plasticizing machine in (2) is 140-150℃; the compression molding is first hot-pressed at 165-175℃ and 10-15MPa pressure for 7-10 minutes, and then cold-pressed for 3-4 minutes.

10. The corrosion-resistant and flame-retardant cable according to claim 1, characterized in that, The conductor includes copper conductors or aluminum conductors; the insulation layer includes a polyvinyl chloride layer or a cross-linked polyethylene layer; the shielding layer includes a copper wire or a tinned copper wire braided layer.

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