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Key Properties of Thermoplastic Semi-Conductive Shielding Compounds:
Electrical Conductivity: These compounds exhibit controlled electrical conductivity, ensuring efficient dissipation of electrical charges and minimizing the risk of voltage breakdown.
Mechanical Strength: Thermoplastic semi-conductive shielding compounds possess high mechanical strength, providing robust protection for cables against physical stressors and mechanical damage.
Thermal Stability: They offer excellent thermal stability, maintaining their properties and performance over a wide range of temperatures, from extreme cold to high heat environments.
Chemical Resistance: These compounds are resistant to a variety of chemicals, including oils, solvents, and acids, ensuring durability and longevity in harsh industrial environments.
Flexibility: Thermoplastic semi-conductive shielding compounds are inherently flexible, allowing for easy processing and installation onto cables of various sizes and shapes.
Processing and Manufacturing Steps:
Formulation: The manufacturing process begins with the formulation of the thermoplastic compound, which involves selecting the appropriate base polymer and incorporating additives such as conductive fillers, stabilizers, and processing aids.
Mixing: The components are then mixed together in precise proportions using specialized equipment such as internal mixers or twin-screw extruders. This ensures uniform dispersion of additives throughout the polymer matrix.
Extrusion: The compounded material is then fed into an extruder, where it is melted and homogenized before being shaped into the desired form. In the case of thermoplastic shielding compounds, this may involve extrusion into sheets, films, or pellets.
Crosslinking: If the shielding compound utilizes crosslinking technology, such as silane crosslinking, this step involves the introduction of crosslinking agents into the polymer matrix. Crosslinking occurs either during extrusion or through subsequent heat treatment processes.
Cooling and Cutting: The extruded material is then cooled using air or water to solidify it before being cut into the desired length or shape.
Quality Control: Throughout the manufacturing process, quality control measures are implemented to ensure that the final product meets the required specifications. This may include testing for electrical conductivity, mechanical properties, thermal stability, and chemical resistance.
Packaging: Once the shielding compound has passed quality control checks, it is packaged into appropriate containers or shipped directly to customers for further processing or installation onto cables.
