HALOGEN-FREE FLAME-RETARDANT INSULATED WIRE

摘要

Provided is a halogen-free flame-retardant insulated electric wire having high hot water resistance and having insulation resistance, flame retardancy, abrasion resistance, and heat deformation resistance which are highly balanced. The halogen-free flame-retardant insulated electric wire includes a conductor and a halogen-free insulating layer that covers the conductor. The insulating layer includes an outer layer composed of a cross-linked product of a resin composition containing a total of 100 parts by mass of a resin component in which 25 to 30 parts by mass of a polyphenylene ether-based resin and 10 to 30 parts by mass of a styrene-based elastomer are finely dispersed in 40 to 65 parts by mass of a high-density polyethylene having a melt flow rate of 0.60 or less, and relative to the resin component, 5% to 50% by mass of a metal phosphinate, 6% to 25% by mass of a phosphoric acid ester, and 1% to 10% by mass of a polyfunctional monomer, and an inner layer composed of a cross-linked polyethylene. A thickness of the inner layer is 10% to 85% of a total of the thickness of the inner layer and a thickness of the outer layer.