This standard specifies the product classification, requirements, test methods, inspection rules, marking, packaging, transportation and storage of black polyethylene compounds for wire and cable (hereinafter referred to as “polyethylene compounds for cable”).
This standard is applicable to the polyethylene compounds for cable mainly made from polyethylene resin with additives such as carbon black and antioxygen through mixing, plasticizing and granulating.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies.
GB/T 1033.1-2008 Plastics - Methods for determining the density of non-cellular plastics - Part 1: Immersion method liquid pyknometer method and titration method (ISO 1183-1:2004, IDT)
GB/T 1040.3-2006 Plastics - Determination of tensile properties - Part 3: Test conditions for films and sheets (ISO 527-3:1995, IDT)
GB/T 1408.1-2006 Electrical strength of insulating materials - Test methods - Part 1: Tests at power frequencies (IEC 60243-1:1998, IDT)
GB/T 1409-2006 Recommended methods for the determination of the permittivity and dielectric dissipation factor of electrical insulating materials at power, audio and radio frequencies including meter wavelengths (IEC 60250:1969, MOD)
GB/T 1410-2006 Methods of test for volume resistivity and surface resistivity of solid electrical insulating materials (IEC 60093:1980, IDT)
GB/T 1633-2000 Plastics - Thermoplastic materials - Determination of Vicat softening temperature (VST) (idt ISO 306:1994)
GB/T 2828.1-2003 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection (ISO 2859-1:1999, IDT)
GB/T 2951.12-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 12: Methods for general application - Thermal ageing methods (IEC 60811-1-2:1985, IDT)
GB/T 2951.14-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 14: Methods for general application - Test at low temperature (IEC 60811-1-4:1985, IDT)
GB/T 2951.41-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 41: Methods specific to polyethylene and polypropylene compounds - Resistance to environmental stress cracking - Measurement of the melt flow index - Carbon black and/or mineral filler content measurement in polyethylene by direct combustion - Measurement of carbon black content by thermo gravimetric analysis (TGA) - Assessment of carbon black dispersion in polyethylene using a microscope (IEC 60811-4-1:2004, IDT)
GB/T 2951.42-2008 Common test methods for insulating and sheathing materials of electric and optical cables - Part 42: Methods specific to polyethylene and polypropylene compounds - Tensile strength and elongation at break after conditioning at elevated temperature - Wrapping test after conditioning at elevated temperature - Wrapping test after thermal ageing in air - Measurement of mass increase - Long-term stability test - Test method for copper-catalyzed oxidative degradation (IEC 60811-4-2:2004, IDT)
GB/T 3682-2000 Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics (idt ISO 1133:1997)
GB/T 5470-2008 Plastics - Determination of the brittleness temperature by impact (ISO 974:2000, MOD)
GB/T 9352-2008 Plastics - Compression moulding test specimens of thermoplastic materials (ISO 293:2004, IDT)
GB/T 12527-2008 Aerial insulated cables for rated voltages up to and including 1kV
GB/T 18251-2000 Method for the assessment of pigment or carbon black dispersion in polyolefin pipes, fittings and compounds (neq ISO/DIS 18553:1999)
3 Product classification
3.1 Specification
Black cylindrical particles with a diameter of 3~4mm and a length of 2~4mm or particles with equivalent volume.
3.2 Classification
The products are classified into two categories based on the application, i.e. sheathing compound and insulating compound. Each category is subdivided into four types, and the
