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CN-122011557-A - Flame-retardant fireproof cable and preparation method thereof

CN122011557ACN 122011557 ACN122011557 ACN 122011557ACN-122011557-A

Abstract

The invention belongs to the technical field of cable manufacture, and particularly relates to a flame-retardant fireproof cable and a preparation method thereof. The invention provides a flame-retardant fireproof cable which comprises a cable core material obtained by stranding copper wires and an outer coating layer coated on the surface of the cable core material, and the preparation method of the flame-retardant fireproof cable comprises the following steps of uniformly mixing high-density polyethylene, linear low-density polyethylene, ethylene-vinyl acetate copolymer, antioxidant, cerium phytate modified zirconium phosphate nano-sheets, amino acid-piperazine pyrophosphate compound flame retardant, polyethylene wax, compatilizer and initiator, heating to 170-190 ℃, extruding through a double-screw extruder, and coating the surface of the cable core material to form the outer coating layer. According to the invention, the flame retardant material cerium phytate modified zirconium phosphate nano-sheet and the amino acid-piperazine pyrophosphate compound flame retardant are added in the preparation process of the outer jacket layer, so that the flame retardant and fireproof performance of the cable can be improved.

Inventors

  • CAI GUOLONG

Assignees

  • 广州锐江新材料科技有限公司

Dates

Publication Date
20260512
Application Date
20260327

Claims (10)

  1. 1. The preparation method of the flame-retardant fireproof cable is characterized by comprising a cable core material obtained by twisting copper wires and an outer sleeve layer wrapping the surface of the cable core material, and comprises the following steps of: uniformly mixing high-density polyethylene, linear low-density polyethylene, ethylene-vinyl acetate copolymer, antioxidant, cerium phytate modified zirconium phosphate nano-sheet, amino acid-piperazine pyrophosphate compound flame retardant, polyethylene wax, compatilizer and initiator, heating to 170-190 ℃, extruding through a double-screw extruder, and wrapping the mixture on the surface of the cable core material to form an outer coating layer, thus obtaining the flame-retardant fireproof cable.
  2. 2. The preparation method of the high-density polyethylene composite flame retardant is characterized by comprising, by weight, 60-80 parts of the high-density polyethylene, 35-45 parts of the linear low-density polyethylene, 15-25 parts of the ethylene-vinyl acetate copolymer, 1-2 parts of the antioxidant, 10-14 parts of the cerium phytate modified zirconium phosphate nano-sheet, 15-25 parts of the amino acid-piperazine pyrophosphate composite flame retardant, 6-8 parts of the polyethylene wax, 8-10 parts of the compatilizer and 1-3 parts of the initiator.
  3. 3. The preparation method of the cerium phytate modified zirconium phosphate nano-sheet according to claim 1 or 2, wherein the preparation method comprises the following steps: (1) Ultrasonically dispersing the zirconium phosphate nano-sheet and KH-550 into deionized water, stirring for reaction, cooling, filtering, washing and drying to obtain silanized zirconium phosphate nano-sheet; (2) And (3) ultrasonically dispersing the silanized zirconium phosphate nano-sheet obtained in the step (1) into deionized water, sequentially adding phytic acid and cerium salt, stirring, filtering, washing and drying to obtain the phytic acid cerium modified zirconium phosphate nano-sheet.
  4. 4. The preparation method of the zirconium phosphate nano-sheet according to claim 3, wherein in the step (1), the mass ratio of the zirconium phosphate nano-sheet to KH-550 is 1:0.03-0.05, the stirring reaction condition is that stirring reaction is carried out for 2-4 hours at 40-60 ℃, and the drying is carried out for 10-14 hours at 60-80 ℃.
  5. 5. The preparation method of the nano-sized ceramic tile according to claim 3, wherein in the step (2), the mass ratio of the silanized zirconium phosphate nano-sheet to the phytic acid to the cerium salt is 1:1.5-4:0.4-0.8, and the cerium salt is one of cerium nitrate, cerium chloride and cerium acetate.
  6. 6. The preparation method of the water-soluble fiber, as claimed in claim 3, wherein in the step (2), the stirring time is 40-60 min, and the drying is carried out at 60-80 ℃ for 10-14h.
  7. 7. The method for preparing the amino acid-piperazine pyrophosphate compound flame retardant according to claim 3, wherein the method for preparing the amino acid-piperazine pyrophosphate compound flame retardant comprises the following steps: Adding amino acid and ammonium polyphosphate into ethanol water, stirring for reaction under the protection of nitrogen, cooling to room temperature, filtering, washing, and vacuum drying to constant weight to obtain the lysine-piperazine pyrophosphate compound flame retardant.
  8. 8. The method according to claim 7, wherein the amino acid comprises lysine and arginine, the mass ratio of lysine to arginine is 1:3-7, and the mass ratio of the amino acid to ammonium polyphosphate is 1:1.5-2.5.
  9. 9. The method of claim 7, wherein the volume ratio of ethanol to water is 9:1, the stirring reaction is carried out at 40-60 ℃ for 4-8 hours, and the vacuum drying temperature is 50-70 ℃.
  10. 10. A flame retardant fire-resistant cable prepared by the preparation method according to any one of claims 1 to 9.

Description

Flame-retardant fireproof cable and preparation method thereof Technical Field The invention belongs to the technical field of cable manufacture. More particularly, to a flame retardant fireproof cable and a preparation method thereof. Background With the rapid development of modern power, communication and construction industries, polyolefin-based cable materials have become key materials for cable manufacture by virtue of their excellent electrical insulation, chemical resistance and processability. However, the inherent flammability of polyolefin resins limits their use in fire safety critical scenarios. Therefore, development of polyolefin cable materials with high-efficiency flame retardance, good mechanical properties and low smoke and zero halogen characteristics has become a research hotspot in the field. CN112961424a discloses a halogen-free flame-retardant fireproof cable and a preparation method thereof. The halogen-free flame-retardant fireproof cable comprises, by weight, 40-60 parts of high-density polyethylene, 30-40 parts of linear low-density polyethylene, 200-300 parts of ethylene-vinyl acetate copolymer, 30-40 parts of compatilizer, 5-10 parts of antioxidant, 5-10 parts of lubricant, 10-20 parts of plasticizer, 20-40 parts of expandable graphite, 40-80 parts of ammonium polyphosphate and 10-20 parts of modified nano magnesium hydroxide. The preparation method comprises the steps of mixing the raw materials, adding additives, stirring, extruding and granulating to obtain a cable material, melting and extruding the cable material, coating the surface of the cable material, and cooling and solidifying. The halogen-free flame-retardant fireproof cable has better halogen-free, flame-retardant and heat-resistant properties, and meanwhile, the strength and other mechanical properties of the cable are not affected. CN116598054A discloses a high-flame-retardance fireproof cable and a preparation method thereof, and the high-flame-retardance fireproof cable comprises a cable core, a shielding layer and a flame-retardance fireproof outer sleeve layer in sequence from inside to outside, wherein the flame-retardance fireproof outer sleeve layer comprises, by mass, 100 parts of polystyrene, 30-40 parts of low-density polyethylene, 20-25 parts of methyl vinyl silicone rubber, 1-2 parts of an initiator, 8-12 parts of a borate-phytate flame retardant and 15-20 parts of octavinyl POSS modified zirconium hydroxide. The borate-phytate flame retardant is utilized to effectively improve the flame retardant property and fire resistance of the flame-retardant fireproof cable, and the mechanical property of the cable is improved, so that the cable is not easy to crack. The invention discloses a flame-retardant fireproof cable material and a preparation method thereof, wherein the flame-retardant fireproof cable material provided by the invention provides electrical insulation performance and flexibility of a base and ensures processability of the material by adopting low-density polyethylene resin as a matrix material, improves tensile strength of the material by adding nylon into the raw material, and solves the technical problems of poor dispersibility and easy migration failure of the traditional inorganic filler by carrying out multi-step treatment on expandable graphite. The flame-retardant and fireproof cable provided by the invention has excellent flame-retardant performance and mechanical property based on the content that the flame-retardant and fireproof performance of the cable can be obviously improved and the mechanical property is improved by adding the flame-retardant material in the cable preparation process. Disclosure of Invention The invention aims to overcome the defects and the shortcomings of the prior art and provide a flame-retardant fireproof cable and a preparation method thereof. The invention provides a flame-retardant fireproof cable which comprises a cable core material obtained by stranding copper wires and an outer coating layer coated on the surface of the cable core material, and the preparation method of the flame-retardant fireproof cable comprises the following steps of uniformly mixing high-density polyethylene, linear low-density polyethylene, ethylene-vinyl acetate copolymer, antioxidant, cerium phytate modified zirconium phosphate nano-sheets, amino acid-piperazine pyrophosphate compound flame retardant, polyethylene wax, compatilizer and initiator, heating to 170-190 ℃, extruding through a double-screw extruder, and coating the surface of the cable core material to form the outer coating layer. According to the invention, the flame retardant material cerium phytate modified zirconium phosphate nano-sheet and the amino acid-piperazine pyrophosphate compound flame retardant are added in the preparation process of the outer jacket layer, so that the flame retardant and fireproof performance of the cable can be improved. The invention aims to provide a preparation method of a