Novel low-smoke, halogen-free and fireproof insulated wire and manufacturing method thereof

Abstract

The invention discloses a novel low-smoke, halogen-free and fireproof insulated wire and a manufacturing method thereof. The fireproof insulated wire comprises wire conductors and an insulated layer. The wire conductors are formed by intertwisting one to sixty-one circular annealed copper wires with a diameter of [phi]1.2-4.5mm in a length direction. The insulated layer is disposed outside the wire conductors, and is a ceramic polyolefin material. The manufacturing method comprises the following steps: S1, drawing copper wires: drawing an oxygen-free copper rod with a 8.0mm diameter and resistivity not more than 0.017241[omega]*mm<2> / m into copper wires with a diameter of [phi]1.2-4.5mm through a conventional technology, the output speed of the copper wires being 3-25m / s, preheating the copper wires to 240-260 DEG C after copper wire drawing, introducing nitrogen, heating the copper wires again to 550-560 EDG C for recrystallization, and blow-drying the copper wires by compressed air and cooling the copper wires to 80 DEG C below after watering cooling; S2, intertwisting conductors (except single-core conductors); S3, extruding an insulated layer; and S4, making an insulated wire a roll. The manufacturing method is easy to operate, the quality control difficulty is minimized, the secondary investment cost of the wire can be reduced if people use the fireproof insulated wire, and the service life of the wire can be prolonged.

Description

technical field [0001] The invention relates to the technical field of manufacturing methods of wire cloth, in particular to a novel low-smoke halogen-free refractory cloth wire and a manufacturing method thereof. Background technique [0002] Wiring wires are mainly used in high-rise buildings and ordinary residential buildings, large buildings and venues, standardized workshops, mobile equipment and machinery, industrial kilns, airports and other crowded places or valuables storage places, and with the ever-changing world technology The amount and density of wires in buildings are increasing, so higher requirements are put forward for the safety and fire resistance of wires. Ordinary cloth wires are mostly insulated with polyvinyl chloride, because the oxygen index of polyvinyl chloride itself is relatively high (generally 27), it has a certain flame retardant ability, but due to the large amount of corrosive gas and smoke generated after burning, it has become an importan...

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Problems solved by technology

However, due to the complex process, low output, difficult quality control and high cost, the production enterprises have been plagued by problems; the fire resistance of the low-smoke and halogen-free refractory wires (demineralization insulated wires) used in the existing market cannot meet the requirements of BS6387 The reason is that the low-smoke, halogen-free cross-linked polyolefin melted during combustion, which caused the failure of the combustion test under mechanical vibration and spraying conditions; Scrapped and replaced with new wires, which cannot be repaired and continue to be used, so the secondary investment cost is increased. If the cable has fire resistance and can be used for repairing the damaged part after burning, this will reduce the line cost. For this reason We propose a new low-smoke halogen-free refractory wire and its manufacturing method

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