Grease-proof low-smoke halogen-free flame-proof cable material
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A flame-retardant cable and oil-resistant technology, used in plastic/resin/wax insulators, organic insulators, etc., can solve the problems of poor oil resistance and low-smoke halogen-free flame retardant materials.
Inactive Publication Date: 2009-08-19
SHANGHAI ELECTRIC CABLE RES INST
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[0004] For polyethylene or EVA substrates, due to their non-polar molecular structure, their oil resistance is generally poor, resulting in poor oil resistance of low-smoke halogen-free flame retardant materials
Method used
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Embodiment 1
[0025] Base material ethylene-vinyl ester copolymer: 25Kg, flame retardant: surface-treated magnesium hydroxide 32.5Kg, surface-treated red phosphorus 1.25Kg, zinc borate 2.5Kg, antimony trioxide 1.25Kg, antioxidant: 1010, 0.25Kg, DLTP 0.25Kg, crosslinking sensitizer TAIC, 0.75Kg, processing aid stearic acid 1.25Kg, colorant carbon black 0.25Kg.
[0026] The above raw materials are respectively placed in a mixer for mixing and stirring, then internally kneaded by a banbury mixer, twin-screw extruded and granulated, processed into wires, and cross-linked by radiation.
Embodiment 2
[0028] Base material ethylene-acid vinyl ester copolymer: 12.75Kg, base material nitrile rubber: 12.25Kg, flame retardant: surface-treated magnesium hydroxide 7.5Kg, surface-treated red phosphorus 1.5Kg, zinc borate 2.5Kg, polyphosphoric acid Ammonium 13.75Kg, antioxidant: 1010, 0.5Kg, cross-linking sensitizer TMPTMA, 1.5Kg, processing aid paraffin 0.5Kg, colorant carbon black, 8.75Kg.
[0029] The above raw materials are respectively placed in a mixer for mixing and stirring, then internally kneaded by a banbury mixer, twin-screw extruded and granulated, processed into wires, and cross-linked by radiation.
Embodiment 3
[0031] Base material ethylene-acid vinyl ester copolymer: 17.5Kg, base material nitrile rubber: 7.5Kg, flame retardant: surface-treated aluminum hydroxide 20Kg, surface-treated magnesium hydroxide 10Kg, surface-treated red phosphorus 2.5Kg, Zinc borate 2.5Kg, ammonium polyphosphate 2.5Kg, antioxidant: 1010, 1Kg, crosslinking sensitizer triallyl cyanurate, 1.5Kg, processing aid stearic acid 1Kg, colorant carbon black 7.5Kg.
[0032] The above raw materials are respectively placed in a mixer for mixing and stirring, then internally kneaded by a banbury mixer, twin-screw extruded and granulated, processed into wires, and cross-linked by radiation.
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Abstract
The invention discloses a cross-linking type environment-friendly cable insulation material, characterized in oil resistance, low content of smoke, zero halogen and flame resistance. The cable insulation material comprises the components with the following weight portions: 20 to 40 percent of ethylene-vinyl acetate copolymer, 0 to 20 percent of nitrile rubber, 40 to 60 percent of flame retardant, 0.5 to 3 percent of oxidizing agent, 1 to 3 percent of cross-linking sensitizer, 0 to 15 percent of coloring agent and 0.5 to 1 percent of processing agent. The flame retardant is made from one or two of aluminum hydroxide and magnesium hydroxide of which surfaces are treated and one or more of red phosphorus, antimony trioxide, zinc borate or phosphate flame-retardant agent of which surfaces are treated; the invention selects the appropriate macromolecule base stock ethylene-vinyl acetate copolymer to compound with the nitrile rubber and applies the surface treatment to inorganic powders for improving the oil resistance of the material. The cable insulation material characterized in low content of smoke and zero halogen has good oil resistance.
Description
technical field [0001] The invention relates to the technical field of wire and cable manufacturing for rail transit, in particular to a formulation of an oil-resistant cross-linked insulating material for a low-smoke, halogen-free, flame-retardant cable. Background technique [0002] As we all know, in recent years, the demand for low-smoke halogen-free flame-retardant cable materials has increased significantly in quantity, and higher requirements have been put forward in terms of varieties. Low-smoke halogen-free flame-retardant cable materials can be divided into thermoplastic type and cross-linked type. Thermoplastic low-smoke halogen-free cable materials are mainly used as sheath materials for various cables such as power cables, control cables, and communication cables. Cross-linked low-smoke halogen-free flame-retardant cable materials are mostly used for insulation and sheathing of cables for ships, cables for nuclear power industry, cables for locomotives, automob...
Claims
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