KS C IEC 60811-4-1-2021 电缆和光缆的绝缘和护套材料.通用试验方法.第4-1部分:聚乙烯和聚丙烯化合物专用方法.耐环境应力开裂性.熔体流动指数的测量.直接燃烧法测量聚乙烯中的炭黑和/或矿物填料含量用热重分析法（TGA）测量炭黑含量.用显微镜评估炭黑在聚乙烯中的分散性
Insulating and sheathing materials of electric and optical cables —Common test methods — Part 4-1: Methods specific to polyethylene and polypropylene compounds — Resistance to environmental stress cra