Flame-retardant sheath material for extra-high-voltage cable and preparation method of flame-retardant sheath material

A flame-retardant sheathing, ultra-high voltage technology, applied in plastic/resin/wax insulators, organic insulators, etc., can solve the problems of decreased mechanical properties of sheathing materials, poor interface compatibility, deterioration of mechanical properties of products, etc., to avoid rapid The effect of growth, improvement of flame retardant performance, and improvement of interfacial compatibility

Active Publication Date: 2019-12-10
江苏枫润线缆材料有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0011] A large amount of carbonate and metal hydroxide is added to the existing cable sheathing material, which causes the mechanical properties of the sheathing material to decline, and the interface compatibility between the inorganic flame retardant additive and the organic matrix resin is poor, which further deteriorates Disadvantages of the mechanical properties of the product, providing a flame-retardant sheath material for ultra-high voltage cables and its preparation method

Method used

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  • Flame-retardant sheath material for extra-high-voltage cable and preparation method of flame-retardant sheath material
  • Flame-retardant sheath material for extra-high-voltage cable and preparation method of flame-retardant sheath material
  • Flame-retardant sheath material for extra-high-voltage cable and preparation method of flame-retardant sheath material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Polyaldehyde Calcium Alginate:

[0033] Mix sodium alginate and water at a mass ratio of 1:20, then add sodium periodate that is 0.3 times the mass of sodium alginate, and then heat and stir for 3 hours at a temperature of 65°C and a stirring speed of 200r / min. , after the reaction is completed, under the conditions of temperature 75°C and pressure 400mmHg, concentrate under reduced pressure to 1 / 2 of the original volume of the material to obtain a concentrate, and then transfer the obtained concentrate to a vacuum drying oven, and store it at a temperature of 105°C , vacuum-dried to a constant weight under the condition of 60 Pa to obtain a dried material, and then impregnated the obtained dried material in a calcium chloride solution with a mass fraction of 3%, and then filtered it for 10 minutes under the condition of an ultrasonic frequency of 55 kHz. filter cake, and wash the filter cake with deionized water for 3 times, then transfer the washed filter cake to a va...

Embodiment 2

[0043] Polyaldehyde Calcium Alginate:

[0044]Mix sodium alginate and water at a mass ratio of 1:30, then add sodium periodate that is 0.3 times the mass of sodium alginate, and then heat and stir for 4 hours at a temperature of 70°C and a stirring speed of 300r / min. , after the reaction is completed, under the conditions of temperature 80°C and pressure 410mmHg, concentrate under reduced pressure to 1 / 2 of the original volume of the material to obtain a concentrate, and then transfer the obtained concentrate to a vacuum drying oven, and store it at a temperature of 108°C , vacuum-dried to a constant weight under the condition of 70 Pa to obtain a dry material, and then impregnated the obtained dry material in a calcium chloride solution with a mass fraction of 5%, and then filtered it for 50 minutes under the condition of an ultrasonic frequency of 70 kHz to obtain filter cake, and wash the filter cake with deionized water 4 times, then transfer the washed filter cake to a va...

Embodiment 3

[0054] Polyaldehyde Calcium Alginate:

[0055] Mix sodium alginate and water at a mass ratio of 1:50, then add sodium periodate that is 0.4 times the mass of sodium alginate, and then heat and stir for 5 hours at a temperature of 75°C and a stirring speed of 500r / min. , after the reaction is completed, under the conditions of temperature 85°C and pressure 420mmHg, concentrate under reduced pressure to 1 / 2 of the original volume of the material to obtain a concentrate, and then transfer the obtained concentrate to a vacuum drying oven, and store it at a temperature of 110°C , vacuum-dried to a constant weight under the condition of 80 Pa to obtain a dried material, and then impregnated the obtained dried material in a calcium chloride solution with a mass fraction of 8%, and then filtered it for 100 min under the condition of an ultrasonic frequency of 80 kHz to obtain filter cake, and wash the filter cake with deionized water for 5 times, then transfer the washed filter cake t...

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Abstract

The invention discloses a flame-retardant sheath material for an extra-high-voltage cable and a preparation method of the flame-retardant sheath material, and belongs to the technical field of composite polymer materials. The developed product is prepared from maleic anhydride graft modified EVA resin, rubber, polyaldehyde calcium alginate, silicate ester, calcium fluoride, metal carbonate, nanometer lead oxide, a vulcanizing agent, an anti-aging agent, an antioxidant and a lubricant. In the product preparation process, all components are weighed according to raw material compositions firstly;then all component raw materials are mixed, and then sequentially subjected to plastication and mixing, then extruding and granulating are conducted to obtain the flame-retardant sheath material forthe extra-high-voltage cable. By improving dispersion and compatibility of an inorganic flame retardant component in a system, the mechanical property and flame retardant performance of the product sheath material are significantly improved.

Description

technical field [0001] The invention discloses a flame-retardant sheath material for ultra-high voltage cables and a preparation method thereof, belonging to the technical field of composite polymer materials. Background technique [0002] Most plastics are flammable. When the temperature reaches a certain level, volatile combustible gases will be generated, which will promote further combustion. Plastic polymers are the main source of cable substrates, and endowing plastic polymers with certain flame-retardant properties is an urgent technical problem to be solved. [0003] The types of flame retardants commonly used in the industry mainly include the following: [0004] (1) Halogen flame retardant system, its flame retardant mechanism is that the halogen flame retardant can decompose to produce HX, and HX degrades to generate free radicals, which terminates and delays the chain reaction in the combustion process; [0005] (2) Intumescent flame retardant system, chemical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/06C08L23/16C08L5/04C08K13/02C08K3/16C08K3/26C08K3/22C08K5/14C08K5/098C08K3/36H01B3/44
CPCC08K2003/162C08K2003/2234C08K2003/262C08K2201/011C08L51/06C08L2201/02C08L2203/202H01B3/44C08L23/16C08L5/04C08K13/02C08K3/16C08K3/26C08K3/22C08K5/14C08K5/098C08K3/36
Inventor 胡俊张健纪天明
Owner 江苏枫润线缆材料有限公司
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