Tensile flame-retardant silicone rubber composition, flame-retardant B1-level silicone rubber insulation polyolefin sheath control cable and preparation method thereof
A silicone rubber composition, silicone rubber insulation technology, applied in the direction of insulated cables, insulators, insulated conductors, etc., can solve the problems of difficult laying, high hardness of materials, poor softness, etc., to improve water resistance and resistance. combustion effect, high temperature resistance effect
Active Publication Date: 2021-11-16
GUANGZHOU METRO DESIGN & RES INST +1
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Problems solved by technology
At the same time, due to cross-linking, cross-linked polyethylene material has high hardness, is not easy to bend, and has poor softness. It is difficult to lay in some specific places.
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preparation example Construction
[0122] The present application also provides a preparation method for the flame-retardant grade B1 silicone rubber insulated polyolefin sheathed control cable, comprising the following steps:
[0123] Rubber mixing, temperature <80°C;
[0124] Add sulfur, temperature <60°C:
[0125] For wire extrusion, the vulcanization temperature of the rubber material is 200°C-300°C, and the extrusion temperature is <40°C.
[0126] Specifically, in the process of controlling the flame-retardant grade B1 silicone rubber insulated polyolefin sheathed cable, the rubber compound mixing process controls the temperature below 80°C; during the vulcanization process, the control temperature is below 60°C and the time is less than 3 minutes; When the wire is extruded, the vulcanization temperature of the rubber is controlled between 200°C and 300°C.
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The invention provides a tensile flame-retardant silicone rubber composition, a flame-retardant B1-grade silicone rubber insulation polyolefin sheath control cable and a preparation method thereof. The tensile flame-retardant silicone rubber composition comprises the following components by weight: 45-75 parts of methyl vinyl silicone rubber; 20-40 parts of silicon dioxide; 10-35 parts of nano-scale active pottery clay; 3-10 parts of hydroxyl siloxane; 5-10 parts of a composite efficient flame retardant; 0.5-3 parts of a cross-linking agent; and 0.5-2 parts of a vulcanizing agent. The tensile flame-retardant silicone rubber composition has the advantages of high temperature resistance, favorable ceramic forming property, B1-level flame retardancy, overload incombustibility, fire resistance and no toxicity.
Description
technical field [0001] The invention relates to the field of electric wires and cables. Specifically, the invention relates to a tensile and flame-retardant silicone rubber composition, a flame-retardant B1 grade silicone rubber insulated polyolefin sheathed control cable and a preparation method thereof. Background technique [0002] At present, the existing flame-retardant B1 level control cables on the market are WDZB1-KYJYP (WDZB1-KYJY) control cables. The main structure and materials of this cable are as follows: [0003] The conductor is stranded copper wire of category 5; the insulating layer is made of low-smoke halogen-free cross-linked polyethylene; the filling layer is made of flame-retardant and halogen-free material; the wrapping layer is made of environmentally friendly flame-retardant mineral material; Combustible low-smoke halogen-free polyolefin (WDZB1-KYJYP type); the shielding layer adopts fine copper wire braided shielding (WDZB1-KYJYP type); the outer sh...
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IPC IPC(8): C08L83/07C08K3/36C08K3/34C08K5/5415C08K3/22C08L23/08C08L23/06H01B3/44H01B7/02H01B7/04H01B7/17H01B7/18H01B7/282H01B7/295H01B13/00H01B13/14H01B13/24
CPCC08K3/36C08K3/346C08K5/5415C08K3/22C08L23/0853H01B7/295H01B7/04H01B7/2825H01B7/18H01B7/17H01B7/0291H01B13/00H01B13/14H01B13/24H01B3/441C08L2201/02C08L2203/202C08L2201/22C08L2201/08C08K2003/2296C08K2003/2265C08K2003/2227C08L83/04C08L23/06Y02A30/14
Inventor 何治新林珊柯志欣刘丽萍邓树赵美君谌小莉
Owner GUANGZHOU METRO DESIGN & RES INST
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