Halogen-free flame-retardant fire-resistant cable and manufacturing method thereof
A flame-retardant and fire-resistant cable technology, which is applied in the direction of cable/conductor manufacturing, insulated cables, conductor/cable insulation, etc., can solve the problems of flame-retardant and fire-resistant contradictions of ceramic materials
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[0038] The present invention also provides a preparation method for the halogen-free flame-retardant and fire-resistant cable described in the above technical solution, comprising the following steps:
[0039] (1) Extrude ceramicized refractory silicone rubber insulating material on the surface of copper conductor to form a ceramicized refractory silicone rubber insulating layer coated on the surface of copper conductor;
[0040] (2) Extrude Class A non-combustible ceramic filling material from the outer surface of the ceramic refractory silicone rubber insulating layer in the step (1), forming a Class A non-combustible ceramic filling coated on the surface of the ceramic refractory silicone rubber insulating layer Floor;
[0041] (3) in the step (2), the surface of the A-level non-combustible ceramic filling layer is wrapped with a fire-proof and heat-insulating wrapping layer;
[0042] (4) Extrude a low-smoke, halogen-free, flame-retardant polyolefin material around the sur...
Embodiment 1
[0052] Step 1: Use a rubber extruder to extrude ceramicized refractory silicone rubber insulation material onto the copper conductor, and vulcanize it through a hot vulcanization box at a vulcanization temperature of 140°C.
[0053] Step 2: Weigh 80 parts of alumina, 20 parts of calcium silicate, 60 parts of potassium silicate, and 1 part of nano-montmorillonite according to the mass parts, add them to the kneader, and mix for 10 minutes to prepare a grade A non-combustible ceramic Filler.
[0054] Step 3: Add the grade A non-combustible ceramic filling material prepared in step 2 into the hopper of the screw extruder, control the screw speed to 200rpm, and extrude and coat the ceramic-coated material prepared in step 1. On the conductor of the refractory silicone rubber insulation layer, and at the same time wrap the outer layer of fire-proof and heat-insulating nano-airgel felt.
[0055] Step 4: Coating the low-smoke, halogen-free, flame-retardant polyolefin sheathing layer...
Embodiment 2
[0060] Step 1: Using a rubber extruder, extrude ceramic refractory silicone rubber insulation material onto the copper conductor, and vulcanize it through a hot vulcanization box at a vulcanization temperature of 300°C.
[0061] Step 2: Weigh 40 parts of mica powder, 40 parts of barium silicate, 20 parts of zirconia, 150 parts of sodium silicate, and 50 parts of nano-silica according to the parts by mass, add them to the internal mixer, mix for 30 minutes, and prepare Produced Class A non-combustible ceramic filling materials.
[0062] Step 3: Add the grade A non-combustible ceramic filling material prepared in step 2 into the hopper of the screw extruder, control the screw speed to 100rpm, and extrude and coat the ceramic-coated material prepared in step 1. On the conductor of the chemical refractory silicone rubber insulation layer, and at the same time wrap the fireproof heat insulation wrapping glass fiber cloth composite ceramic fiber felt on the outside.
[0063] Step 4...
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Abstract
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