Function and Introduction:
Semi-conductive cable compounds serve several functions in power cables:
Electrical Stress Control: They help in distributing electrical stress evenly across the cable insulation, reducing the risk of electrical breakdown.
Preventing Corrosion: These compounds often include additives to protect against corrosion and oxidation.
Environmental Protection: They provide resistance to environmental factors such as moisture and UV radiation.
Mechanical Stability: These compounds enhance the mechanical properties of the cable insulation, providing durability and strength.
Rough Formulation:
The formulation of semi-conductive cable compounds can vary depending on specific requirements and manufacturer preferences. However, a typical formulation may include:
Polymer Base: polyethylene (PE)
Carbon Black: To impart semi-conductive properties.
Additives: Including antioxidants, stabilizers, and processing aids.
Fillers: Such as mineral fillers for reinforcement and to control properties like density.
Compounding Requirements for Semi-conductive Cable Compounding:
Uniform Dispersion: Effective dispersion of carbon black or other conductive fillers within the polymer matrix is essential to ensure consistent electrical conductivity throughout the compound.
Stabilization: Incorporation of antioxidants and stabilizers to protect the compound from degradation due to heat, oxidation, and environmental factors, ensuring long-term performance and reliability.
Consistent Quality: Tight control over processing parameters such as temperature, mixing time, and shear rate is necessary to maintain batch-to-batch consistency and quality of the compound.
Processing Efficiency: Efficient mixing and dispersion are crucial to minimize processing time and energy consumption while maximizing throughput and productivity.
Compounding Process for Semi-conductive cable compounds:
Compounding: The raw materials, including the polymer base, carbon black, additives, and fillers, are mixed together in precise proportions in a compounding mixer. This process ensures uniform distribution of ingredients with XINDA Co-Kneader.