| 主权项 |
1. An insulated electric wire comprising:
a conductor; and an insulation layer provided on an outer circumference of the conductor, wherein the insulation layer comprises:
a base polymer comprising ethylene-vinyl acetate copolymer, the base polymer having a vinyl acetate content of 25% by mass or more and less than 50% by mass; anda metal hydroxide comprising magnesium hydroxide, wherein the insulation layer has:
tensile properties such that a tensile strength is 10 MPa or more and a tensile elongation is 125% or more in an initial tensile test in accordance with EN60811-1-1;a heat resistance such that a tensile strength change rate is within ±30% and a tensile elongation change rate is within ±40% in a heat resistance test in accordance with EN60811-1-2;an oil resistance such that an elongation change rate is within ±40% in an oil resistance test in accordance with EN60811-2-1; andlow-temperature properties such that a tensile elongation is 30% or more in a low-temperature test in accordance with EN60811-1-4, and wherein the insulated electric wire has:
a flame retardancy such that, in a combustion test in accordance with IEC60332-1, a distance from a bottom of an upper holder to a carbonized portion of the insulated electric wire is 50 mm or more in an upper part of the insulated electric wire and 540 mm or less in a lower part of the insulated electric wire;low smoke emission properties such that a transmissivity is 70% or more in a smoke emission test in accordance with EN61034-2;a flexibility such that, when the insulated electric wire is placed on a test stand so as to extend out by 1 m at one end of the insulated electric wire and a weight of 0.3 kg is hung from the one end, a displacement amount of the one end is 100 mm or more; anda cold resistance such that, when a bending test is performed at −40° C. in accordance with EN60811-1-48.1, the insulated electric wire after being wound exhibits no cracks. |
