Flame-retardant PVC (polyvinyl chloride) sheath material for ultrahigh-voltage cables and preparation method of material
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An ultra-high voltage, flame-retardant technology, applied in the direction of plastic/resin/wax insulators, organic insulators, etc., can solve the problems of poor flame retardancy and electric tracking resistance, and achieve excellent flame retardancy and electric tracking resistance, good heat resistance
Inactive Publication Date: 2015-02-18
安徽电信器材贸易工业有限责任公司
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The PVC sheathing materials used for ultra-high voltage cables in the existing market have the disadvantages of poor flame retardancy and electric tracking resistance, which cannot meet market demand
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[0012] A PVC sheath material for flame-retardant ultra-high voltage cables, made of the following raw materials (kg): SG-3 type polyvinyl chloride 45, polybenzimidazole 26, diethylene glycol diacrylate 15, phosphoric acid Triisopropylphenyl ester 14, dibasic lead phthalate 3, antimonite powder 18, brominated polystyrene 20, trioctyl citrate 12, cerium trifluoride 4, nano-beta molecular sieve 3, asbestos powder 16, divinylbenzene 5, brucite powder 17, diethyl glutarate 12, flame retardant 19, 2,4-bis(dodecylthiomethyl)-6-methylphenol 1.5, three ( 2-hydroxyethyl) isocyanurate 2, 4,4'-dihydroxydiphenyl sulfide 1.5, oxidized polyethylene wax 5;
[0013] The preparation method of the flame retardant is as follows: a. Take boehmite, brucite, and montmorillonite in a mass ratio of 6:5:3 and mix them evenly, pulverize them, pass through a 150-mesh sieve, and then add water to make an oar. Concentration is 55% slurry, then add 5% ZnO, 25% NaOH and 20% Na 2 Sn(OH) 6 , heated ...
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Abstract
The invention discloses a flame-retardant PVC (polyvinyl chloride) sheath material for ultrahigh-voltage cables and a preparation method of the material. The sheath material is prepared from the following raw materials in parts by weight: 33-55 parts of SG-3 polyvinyl chloride, 18-32 parts of polybenzimidazole, 14-18 parts of diethylene glycol diacrylate, 11-16 parts of isopropyl phenyl diphenyl phosphate, 2.5-3.5 parts of dibasic lead phthalate, 16-22 parts of cervantite powder, 15-25 parts of brominated polystyrene, 10-15 parts of trioctyl citrate, 3-5 parts of cerous fluoride, 2-4 parts of a nano beta molecular sieve, 13-19 parts of asbestos powder, 4-6 parts of divinyl benzene, 15-20 parts of brucite powder, 10-15 parts of diethyl glutarate, 17-23 parts of a flame retardant, 1-2 parts of 2,4-bis(dodecylthiomethyl)-6-methylphenol, 2-3 parts of tri(2-hydroxyethyl)isocyanurate, 1-2 parts of 4,4'-dihydroxyl diphenyl sulfide and 4-6 parts of oxidized polyethlene wax. The sheath material is excellent in flame retardance and tracking resistance, has the characteristics of good heat resistance, acid and alkaline corrosion resistance, ultraviolet ageing resistance and oil resistance and the like, and can be widely applied to ultrahigh-voltage cable sheath layers.
Description
technical field [0001] The invention relates to a PVC sheath material for flame-retardant ultra-high voltage cables and a preparation method thereof, belonging to the field of cable materials. Background technique [0002] PVC cable material is based on polyvinyl chloride, adding stabilizers, plasticizers, inorganic fillers, additives, lubricants and other additives, and is prepared by mixing, kneading and extrusion. As a traditional cable material, it has the advantages of excellent flame retardancy, electrical insulation, wear resistance, good mechanical properties, wide range of sources, and low price, and occupies the most important market share in the domestic market. At present, with the continuous expansion of wire and cable market demand and the continuous deepening of my country's PVC research and development work, the performance requirements for PVC cable materials are becoming more and more stringent. The PVC sheathing materials used for ultra-high voltage c...
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