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CN-122025262-A - Low-smoke halogen-free flame-retardant environment-friendly power cable

CN122025262ACN 122025262 ACN122025262 ACN 122025262ACN-122025262-A

Abstract

The invention relates to the technical field of cables, and provides a low-smoke halogen-free flame-retardant environment-friendly power cable which sequentially comprises, from inside to outside, a conductor, an insulating layer, a shielding layer and an outer sheath layer, wherein the outer sheath layer comprises, by weight, 90-100 parts of high-density polyethylene, 40-50 parts of flame retardant, 10-15 parts of ethylene-butyl acrylate copolymer, 0.5-2 parts of antioxidant, 1-3 parts of plasticizer, 0.5-1.5 parts of lubricant and 1.5-3 parts of compatilizer, and the flame retardant comprises, by weight, 100 parts of magnesium hydroxide, 18-20 parts of methyl methacrylate and 4-6 parts of itaconic acid. Through the technical scheme, the problem of poor flame retardance of the power cable in the related technology is solved.

Inventors

  • Qian Chaoxing
  • ZHANG ZICHUANG
  • LIU YUQIAN
  • LI PENG

Assignees

  • 百川电缆有限公司

Dates

Publication Date
20260512
Application Date
20260127

Claims (10)

  1. 1. The low-smoke halogen-free flame-retardant environment-friendly power cable is characterized by sequentially comprising, from inside to outside, a conductor, an insulating layer, a shielding layer and an outer sheath layer, wherein the outer sheath layer comprises, by weight, 90-100 parts of high-density polyethylene, 40-50 parts of flame retardant, 10-15 parts of ethylene-butyl acrylate copolymer, 0.5-2 parts of antioxidant, 1-3 parts of plasticizer, 0.5-1.5 parts of lubricant and 1.5-3 parts of compatilizer; the flame retardant comprises the following raw materials in parts by weight, namely 100 parts of magnesium hydroxide, 18-20 parts of methyl methacrylate and 4-6 parts of itaconic acid.
  2. 2. The low-smoke halogen-free flame-retardant environment-friendly power cable according to claim 1, wherein the mass ratio of the methyl methacrylate to the itaconic acid is 3-5:1.
  3. 3. The low-smoke halogen-free flame-retardant environment-friendly power cable as claimed in claim 1, wherein the preparation method of the flame retardant comprises the following steps: S1, dispersing magnesium hydroxide and a silane coupling agent in water to obtain a magnesium hydroxide aqueous dispersion; s2, dispersing sodium dodecyl benzene sulfonate in water, adding methyl methacrylate and itaconic acid for emulsification, and then adding an initiator to obtain emulsion; s3, mixing the emulsion with the magnesium hydroxide aqueous dispersion, filtering and drying to obtain the flame retardant.
  4. 4. The low-smoke halogen-free flame-retardant environment-friendly power cable according to claim 3, wherein in the step S1, the mass of the silane coupling agent is 3% -5% of the mass of magnesium hydroxide.
  5. 5. The low-smoke halogen-free flame-retardant environment-friendly power cable according to claim 3, wherein in the step S3, the mixing temperature is 65-75 ℃ and the mixing time is 2.5-3 h.
  6. 6. The low smoke zero halogen flame retardant environment friendly power cable of claim 1 wherein said ethylene butyl acrylate copolymer comprises a first ethylene butyl acrylate copolymer and a second ethylene butyl acrylate copolymer, said first ethylene butyl acrylate copolymer and said second ethylene butyl acrylate copolymer having different melt flow rates.
  7. 7. The low smoke zero halogen flame retardant environmental protection power cable of claim 6 wherein said first ethylene butyl acrylate copolymer has a melt flow rate of 7.0g/10min under test conditions of 190 ℃ per 2.16kg and said second ethylene butyl acrylate copolymer has a melt flow rate of 12g/10min under test conditions of 190 ℃ per 2.16kg.
  8. 8. The low-smoke halogen-free flame-retardant environment-friendly power cable according to claim 7, wherein the mass ratio of the first ethylene-butyl acrylate copolymer to the second ethylene-butyl acrylate copolymer is 6-8:3.
  9. 9. The low smoke zero halogen flame retardant, environmentally friendly power cable of claim 1 wherein said antioxidant comprises one or more of antioxidant 1010, antioxidant 1098 and antioxidant 168.
  10. 10. The low smoke zero halogen flame retardant environment friendly power cable according to claim 1 wherein said plasticizer comprises one or both of dioctyl sebacate and trioctyl trimellitate.

Description

Low-smoke halogen-free flame-retardant environment-friendly power cable Technical Field The invention relates to the technical field of cables, in particular to a low-smoke halogen-free flame-retardant environment-friendly power cable. Background The power cable is used as a core carrier for electric energy transmission and distribution, is widely applied to various fields of industrial production, urban capital construction, high-rise buildings and the like, has critical operation safety and environmental protection, and has severe requirements on fire prevention and control and environmental protection of the cable in the market along with urban acceleration and smart grid construction promotion. The traditional power cable is mainly made of halogen-containing polymer materials such as polyvinyl chloride, and a large amount of toxic and harmful gases, dense black smoke and corrosive acid liquor are easily generated during combustion, so that the environment is polluted, and the traditional power cable is gradually replaced by a low-smoke halogen-free flame-retardant cable. However, the low smoke halogen-free cable in the prior art has poor flame retardancy, and in order to improve the flame retardancy, it is generally selected to add a large amount of inorganic flame retardant such as magnesium hydroxide to the outer sheath layer. However, the problem of easy agglomeration exists when magnesium hydroxide is directly added into the cable outer sheath layer material, so that the flame retardant effect of the cable outer sheath layer material cannot be well exerted. Therefore, a low-smoke halogen-free flame-retardant environment-friendly power cable needs to be provided. Disclosure of Invention The invention provides a low-smoke halogen-free flame-retardant environment-friendly power cable, which solves the problem of poor flame retardance of the power cable in the related art. The technical scheme of the invention is as follows: The invention provides a low-smoke halogen-free flame-retardant environment-friendly power cable which sequentially comprises a conductor, an insulating layer, a shielding layer and an outer sheath layer from inside to outside, wherein the outer sheath layer comprises the following raw materials, by weight, 90-100 parts of high-density polyethylene, 40-50 parts of flame retardant, 10-15 parts of ethylene-butyl acrylate copolymer, 0.5-2 parts of antioxidant, 1-3 parts of plasticizer, 0.5-1.5 parts of lubricant and 1.5-3 parts of compatilizer; the flame retardant comprises the following raw materials in parts by weight, namely 100 parts of magnesium hydroxide, 18-20 parts of methyl methacrylate and 4-6 parts of itaconic acid. As a further technical scheme, the mass ratio of the methyl methacrylate to the itaconic acid is 3-5:1, and is preferably 4:1. As a further technical scheme, the preparation method of the flame retardant comprises the following steps: S1, dispersing magnesium hydroxide and a silane coupling agent in water to obtain a magnesium hydroxide aqueous dispersion; s2, dispersing sodium dodecyl benzene sulfonate in water, adding methyl methacrylate and itaconic acid, emulsifying for 20-30 min at 60-65 ℃, cooling, and adding an initiator to obtain emulsion; s3, mixing the emulsion with the magnesium hydroxide aqueous dispersion, filtering and drying to obtain the flame retardant. As a further technical scheme, in the step S1, the mass of the silane coupling agent is 3% -5% of the mass of the magnesium hydroxide. As a further technical scheme, the silane coupling agent is silane coupling agent KH-570. As a further technical scheme, in the step S1, the mass-volume ratio of the magnesium hydroxide to the water is 1 g/8 mL. In a further technical scheme, in the step S2, the mass-volume ratio of the sodium dodecyl benzene sulfonate to the water is 1g to 50mL, and the mass ratio of the methyl methacrylate to the sodium dodecyl benzene sulfonate to the initiator is 100:6:2. As a further technical scheme, in step S2, the cooling is to 35-40 ℃. As a further technical scheme, the initiator is ammonium persulfate. As a further technical scheme, in the step S3, the temperature of the mixing is 65-75 ℃ and the time is 2.5-3 hours. As a further technical scheme, the ethylene-butyl acrylate copolymer comprises a first ethylene-butyl acrylate copolymer and a second ethylene-butyl acrylate copolymer, and the melt flow rates of the first ethylene-butyl acrylate copolymer and the second ethylene-butyl acrylate copolymer are different. As a further technical scheme, the melt flow rate of the first ethylene-butyl acrylate copolymer is 7.0g/10min, the test condition is 190 ℃ per 2.16kg, and the melt flow rate of the second ethylene-butyl acrylate copolymer is 12g/10min, and the test condition is 190 ℃ per 2.16kg. According to the low-smoke halogen-free flame-retardant environment-friendly power cable, two components formed by compounding ethylene-butyl acrylate copolymers with different melt fl