Insulated wire for vehicle use and cable for vehicle use

摘要

An insulated wire for vehicle use includes a conductor and an insulating layer disposed on an outer circumference of the conductor. The insulating layer comprises a halogen-free flame retardant cross-linkable resin composition containing a base polymer, and a silane coupling agent and a metal hydroxide which are added to the base polymer. The base polymer includes, as major components, (a) an ethylene-vinyl acetate copolymer (EVA) and (b) an acid-modified olefin resin having a Tg of −55° C. or lower at a ratio (a):(b) of 70:30 to 100:0 and has an acetic acid content (VA) of 50% to 70% by mass. The silane-coupling agent is added in an amount of 1 to 5 parts by mass and the metal hydroxide is added in an amount of 100 to 250 parts by mass relative to 100 parts by mass of the base polymer.

主权项

1. An insulated wire for vehicle use comprising:
a conductor; and an insulating layer disposed on an outer circumference of the conductor, wherein the insulating layer comprises a halogen-free flame retardant cross-linkable resin composition containing a base polymer, and a silane coupling agent and a metal hydroxide which are added to the base polymer; the base polymer includes, as major components, (a) an ethylene-vinyl acetate copolymer (EVA) and (b) an acid-modified olefin resin having a glass transition temperature (Tg) determined by DSC of −55° C. or lower at a ratio (a):(b) of 70:30 to 100:0 and has an acetic acid content (VA) of 50% to 70% by mass; the silane-coupling agent is added in an amount of 1 to 5 parts by mass relative to 100 parts by mass of the base polymer; and the metal hydroxide is added in an amount of 100 to 250 parts by mass relative to 100 parts by mass of the base polymer, wherein the EVA includes two or more types of EVAs and includes 5% to 10% by mass of an EVA having a melt flow rate (MFR) of 15 g/10 min or more wherein the silane coupling agent includes one or more vinyl silane compounds, one or more amino silane compounds, one or more epoxy silane compounds, one or more acrylsilane compounds, one or more polysulfide silane compounds and one or more mercaptosilane compounds.