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

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 /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.