Common test methods for insulating and sheathing materials of electric cables; part 4: methods specific to polyethylene and polypropylene compounds; section 1: resistance to environmental stress cracking; wrapping test after thermal ageing in air; measure

This technical specification outlines specialized procedures for evaluating the performance of polyethylene and polypropylene compounds used in electrical cable insulation and sheathing. It specifically addresses methods designed to assess the material's resistance to environmental stress cracking following thermal aging in air. The documented approach includes a winding test, which subjects aged samples to specific deformation conditions to determine their structural integrity under stress. Additionally, the document incorporates guidelines for measuring the Melt Flow Index, a critical parameter for characterizing the flow properties of the polymer material during processing. These standardized test methods ensure consistent evaluation of material behavior, supporting the quality assessment of compounds intended for insulation and protective layers in electrical applications. The scope focuses on the specific section related to cracking resistance and melt flow characteristics, providing a framework for comparative analysis and quality control in the manufacturing and selection of these polymeric materials.