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CN-122011580-A - Corrosion-resistant insulated cable and preparation method thereof

CN122011580ACN 122011580 ACN122011580 ACN 122011580ACN-122011580-A

Abstract

The invention discloses a corrosion-resistant insulated cable and a preparation method thereof, and relates to the technical field of polypropylene, wherein the corrosion-resistant insulated cable comprises, from inside to outside, a conductor, an insulating layer, an armor layer and a sheath layer, the sheath layer comprises, by mass, 70-80 parts of polypropylene, 20-30 parts of blended polypropylene, 16-20 parts of ethylene-propylene-hexene copolymer, 0.01-0.05 part of a composite nucleating agent, 0.2-0.3 part of an antioxidant, 5-10 parts of a compatilizer, 2-5 parts of a reinforcing filler and 0.5-1 part of silane modified zirconia, the composite nucleating agent comprises, by mass, 1:0.5-0.8 of a beta-crystal aromatic amide nucleating agent and an alpha-crystal carboxylate nucleating agent, the armor layer is formed by winding galvanized steel wires in a spiral structure, and the winding angle is 15-25 degrees.

Inventors

  • WANG CHENG

Assignees

  • 上海昭朔特种线缆有限公司

Dates

Publication Date
20260512
Application Date
20260227

Claims (10)

  1. 1. The corrosion-resistant insulated cable is characterized by comprising a conductor, an insulating layer, an armor layer and a sheath layer from inside to outside, wherein the sheath layer comprises the following raw materials, by mass, 70-80 parts of polypropylene, 20-30 parts of blended polypropylene, 16-20 parts of ethylene-propylene-hexene copolymer, 0.01-0.05 part of composite nucleating agent, 0.2-0.3 part of antioxidant, 5-10 parts of compatilizer, 1-3 parts of reinforcing filler and 0.5-1 part of silane modified zirconia.
  2. 2. The corrosion-resistant insulated cable according to claim 1, wherein the blending polypropylene is obtained by blending and granulating a random copolymer polypropylene and a polyolefin elastomer according to a mass ratio of 1:0.3-0.5, and the blending process parameters are that the temperature of a feed inlet is 180-190 ℃, the temperature of a discharge outlet is 190-205 ℃, the stirring speed is 120-160 r/min and the stirring time is 30-40 min.
  3. 3. The corrosion-resistant insulated cable of claim 1, wherein the composite nucleating agent comprises beta-crystal form aromatic amide nucleating agent and alpha-crystal form carboxylate nucleating agent in a mass ratio of 1:0.5-0.8, and the compatilizer is maleic anhydride grafted polypropylene.
  4. 4. The corrosion resistant insulated cable of claim 1, wherein the reinforcing filler is prepared by the steps of: S1, adding montmorillonite and ammonia water into absolute ethyl alcohol for ultrasonic dispersion, mixing tetraethoxysilane and absolute ethyl alcohol, adding the montmorillonite mixed solution, stirring for 6-8 hours, and then filtering and drying to obtain composite particles; placing the modified composite particles in deionized water, adding sodium carbonate, heating to 75-80 ℃ and stirring for 2-3 hours, cooling to 60-70 ℃, adding the dispersing agent, stirring and reacting for 2-3 hours, filtering and drying, placing the mixture in the deionized water for ultrasonic dispersion for 20-30 minutes, adding polyethylene glycol and stirring for 10-20 minutes, adding gelatin, stirring for 20-30 minutes at 35-45 ℃, adding azobisisobutyronitrile and methyl methacrylate, heating to 65-70 ℃ and reacting for 3-4 hours, heating to 80-85 ℃ and reacting for 0.5-1 hour, filtering and washing, drying at 50 ℃ for 20-24 hours, heating to 80-110 ℃ and treating for 1-3 hours, and carrying out ice water bath to obtain porous modified composite particles; S2, placing N-vinylformamide, 1H, 2H-perfluoro-1-decene and azodiisobutyronitrile in tetrahydrofuran, heating to 65-70 ℃ in a nitrogen atmosphere, reacting for 8-10 hours, filtering, washing, drying, placing in ethanol, adding sodium hydroxide, heating to 70-75 ℃ in a nitrogen atmosphere, reacting for 48 hours, steaming, drying, placing in ethanol, adding hydroiodic acid, reacting for 20-24 hours in a dark place at-1~0 ℃, pouring into dichloromethane, filtering, washing, placing in ethanol, adding porous modified composite particles, stirring for 2-4 hours, steaming, and drying to obtain the reinforced filler.
  5. 5. The corrosion-resistant insulated cable according to claim 4, wherein the composite particles in S1 comprise the following raw materials, by mass, 8-10 parts of montmorillonite, 18-20 parts of ammonia water and 45-50 parts of ethyl orthosilicate, and the mass ratio of the composite particles to the dispersing agent is 1:0.1-0.3.
  6. 6. The corrosion-resistant insulated cable according to claim 4, wherein the porous modified composite particles in S1 comprise, by mass, 10-12 parts of modified composite particles, 0.8-1 part of sodium carbonate, 1-2 parts of a dispersing agent, 2-4 parts of polyethylene glycol, 1-1.5 parts of gelatin, 0.5-1 part of azobisisobutyronitrile and 40-50 parts of methyl methacrylate.
  7. 7. The corrosion-resistant insulated cable according to claim 4, wherein the reinforcing filler in S2 comprises, by mass, 0.6-0.9 part of N-vinylformamide, 0.4-0.6 part of 1H, 2H-perfluoro-1-decene, 0.02-0.03 part of azobisisobutyronitrile, 0.8-0.9 part of sodium hydroxide, 2.5-2.8 parts of hydroiodic acid and 10-15 parts of porous modified composite particles.
  8. 8. The corrosion-resistant insulated cable according to claim 1, wherein the insulating layer is made of an environment-friendly polyolefin material, and the armor layer is formed by winding galvanized steel wires in a spiral structure, wherein the winding angle is 15-25 degrees.
  9. 9. The method for preparing the corrosion-resistant insulated cable according to claim 1, which is characterized by comprising the following steps of sequentially arranging an insulating layer and an armor layer outside a conductor, and extruding the mixed jacket layer on the outer surface of the armor layer to obtain the corrosion-resistant insulated cable.
  10. 10. The method for preparing the corrosion-resistant insulated cable according to claim 9, wherein the preparation step of mixing the sheath layer is that polypropylene, blended polypropylene, a compatilizer, reinforcing filler and a composite nucleating agent are mixed, stirred and blended for 6-10 min at 180-190 ℃ at 40-60 r/min, silane modified zirconia and ethylene-propylene-hexene copolymer are added, stirred and blended for 6-8 min at 180-190 ℃ and extruded and granulated.

Description

Corrosion-resistant insulated cable and preparation method thereof Technical Field The invention relates to the technical field of polypropylene, in particular to a corrosion-resistant insulated cable and a preparation method thereof. Background Power and communication cables are the proposition for energy and information transmission in modern society. In special environments such as ocean development, coastal areas, chemical plants, mines and the like, cables are exposed to complex corrosive environments such as high humidity, high salt fog, chemical media, microorganisms and the like for a long time, and the reliability of the cables faces serious challenges. The failure of the cable often starts from the sheath at the outermost layer, and corrosion, aging and cracking of the sheath can lead to direct exposure and accelerated degradation of the inner metal armor, the insulating layer and even the conductor, thereby causing serious accidents such as insulation drop, short circuit, fire and the like; While traditional cable sheath materials, such as polyvinyl chloride, polyethylene and the like, have certain chemical resistance, but obviously lack in long-term and severe corrosion environments, polypropylene is taken as a semi-crystalline thermoplastic polymer, and is regarded as a potential matrix material in the field of cable sheath due to excellent chemical stability, low density, good electrical insulation and relatively low cost, however, unmodified polypropylene still has a plurality of inherent defects of insufficient toughness, insufficient corrosion resistance and the like; thus, there is a need to prepare a corrosion resistant insulated cable to accommodate complex corrosive environments. Disclosure of Invention The invention aims to provide a corrosion-resistant insulated cable and a preparation method thereof, which are used for solving the problems in the background technology. In order to solve the technical problems, the invention provides the following technical scheme: The corrosion-resistant insulated cable comprises a conductor, an insulating layer, an armor layer and a sheath layer from inside to outside, wherein the sheath layer comprises the following raw materials, by mass, 70-80 parts of polypropylene, 20-30 parts of blended polypropylene, 16-20 parts of ethylene-propylene-hexene copolymer, 0.01-0.05 part of a composite nucleating agent, 0.2-0.3 part of an antioxidant, 5-10 parts of a compatilizer, 1-3 parts of reinforcing filler and 0.5-1 part of silane modified zirconia; Preferably, the blending polypropylene is obtained by blending and granulating the random copolymer polypropylene and the polyolefin elastomer according to the mass ratio of 1:0.3-0.5, wherein the blending process parameters are that the temperature of a feed inlet is 180-190 ℃, the temperature of a discharge outlet is 190-205 ℃, the stirring rotation speed is 120-160 r/min, and the stirring time is 30-40 min; Preferably, the composite nucleating agent consists of beta-crystal form aromatic amide nucleating agent and alpha-crystal form carboxylate nucleating agent in the mass ratio of 1:0.5-0.8, wherein the compatilizer is maleic anhydride grafted polypropylene; preferably, the reinforcing filler is prepared by the steps of: S1, adding montmorillonite and ammonia water into absolute ethyl alcohol for ultrasonic dispersion, mixing tetraethoxysilane and absolute ethyl alcohol, adding the montmorillonite mixed solution, stirring for 6-8 hours, and then filtering and drying to obtain composite particles; placing the modified composite particles in deionized water, adding sodium carbonate, heating to 75-80 ℃ and stirring for 2-3 hours, cooling to 60-70 ℃, adding the dispersing agent, stirring and reacting for 2-3 hours, filtering and drying, placing the mixture in the deionized water for ultrasonic dispersion for 20-30 minutes, adding polyethylene glycol and stirring for 10-20 minutes, adding gelatin, stirring for 20-30 minutes at 35-45 ℃, adding azobisisobutyronitrile and methyl methacrylate, heating to 65-70 ℃ and reacting for 3-4 hours, heating to 80-85 ℃ and reacting for 0.5-1 hour, filtering and washing, drying at 50 ℃ for 20-24 hours, heating to 80-110 ℃ and treating for 1-3 hours, and carrying out ice water bath to obtain porous modified composite particles; S2, placing N-vinylformamide, 1H, 2H-perfluoro-1-decene and azodiisobutyronitrile in tetrahydrofuran, heating to 65-70 ℃ in a nitrogen atmosphere, reacting for 8-10 hours, filtering, washing, drying, placing in ethanol, adding sodium hydroxide, heating to 70-75 ℃ in a nitrogen atmosphere, reacting for 48 hours, steaming, drying, placing in ethanol, adding hydroiodic acid, reacting for 20-24 hours in a dark place at-1~0 ℃, pouring into dichloromethane, filtering, washing, placing in ethanol, adding porous modified composite particles, stirring for 2-4 hours, steaming, and drying to obtain the reinforced filler. Preferably, the composite particles in the S1 c