HALOGEN-FREE FLAME-RETARDANT INSULATED WIRE

摘要

Provided is a halogen-free flame-retardant insulated wire which has high hot water resistance, while achieving a good balance among insulation resistance, flame retardancy, wear resistance and thermal deformation resistance at high levels. A halogen-free flame-retardant insulated wire which comprises a conductor and a halogen-free insulating layer that covers the conductor. The insulating layer has: an outer layer that is formed of a crosslinked body of a resin composition which contains 100 parts by mass in total of resin components, wherein 25-30 parts by mass of a polyphenylene ether resin and 10-30 parts by mass of a styrene elastomer are finely dispersed in 40-65 parts by mass of a high-density polyethylene having a melt flow rate of 0.60 or less, and 5-50% by mass of a metal phosphinate, 6-25% by mass of a phosphoric acid ester and 1-10% by mass of a polyfunctional monomer relative to the resin components; and an inner layer that is formed of a crosslinked polyethylene. The thickness of the inner layer is 10-85% of the total thickness of the inner layer and the outer layer.