To provide an ETFE copolymer and a wire coating resin material capable of forming a coating layer which is excellent in stress cracking resistance under a high temperature and which has a high heat resistance temperature, and an electric wire having a coating layer which is excellent in stress cracking resistance under a high temperature and which has a high heat resistance temperature. A copolymer comprising structural units derived from ethylene, structural units derived from tetrafluoroethylene, and structural units derived from a third monomer, wherein in an elution curve obtained by a temperature rising elution fractionation method with respect to the copolymer, a ratio (L/H) of a proportion (L: area %) of components with elution temperatures of from 190 to 200° C. to a proportion (H: area %) of components with elution temperatures of at least 205° C., and a proportion (M: mol %) of structural units derived from the third monomer based on all structural units of the copolymer, satisfy a relation of log (L/H)/M≥0.90.
提供一种 E
TFE 共聚物和一种电线涂覆
树脂材料,该材料能够形成在高温下抗应力开裂性能优异且耐热温度高的涂覆层,以及一种具有在高温下抗应力开裂性能优异且耐热温度高的涂覆层的电线。一种共聚物,由
乙烯衍生的结构单元、
四氟乙烯衍生的结构单元和第三种单体衍生的结构单元组成,其中在通过升温洗脱分馏法获得的与共聚物有关的洗脱曲线中,洗脱温度为 190 至 200 摄氏度的组分比例(L:面积百分比)与洗脱温度至少为 205 摄氏度的组分比例(H:面积百分比)之比(L/H)、第三单体衍生的结构单元占共聚物所有结构单元的比例(M:摩尔百分比)满足 log (L/H)/M≥0.90 的关系。