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PE optical cable sheathing granules

PE optical cable sheathing granules are high-molecular polyethylene compounds, available in virgin or recycled forms, designed for extrusion into protective cable jackets with excellent mechanical, electrical, and environmental resistance.Composition and Types

PE sheathing granules are primarily made from high-molecular-weight polyethylene (PE), which can be LDPE, MDPE, HDPE, or LLDPE, depending on the required flexibility, toughness, and environmental resistance . Virgin PE granules are produced from pure polyethylene with additives for UV stabilization, antioxidants, and processing aids, while recycled PE granules incorporate post-industrial or post-consumer PE but maintain performance standards for cable sheathing . Specialized compounds may also include flame-retardant, low-smoke, halogen-free (LSZH), or cross-linked PE (XLPE) formulations for enhanced safety and durability .

Properties

PE granules for optical cable sheathing are engineered to provide:

  • Mechanical strength: Resistance to impact, abrasion, and tensile stress.
  • Electrical insulation: High dielectric strength suitable for optical and telecom cables.
  • Environmental resistance: UV, moisture, and chemical resistance for outdoor applications.
  • Thermal stability: Operation typically up to 70°C, with some grades tolerating higher processing temperatures . These properties ensure the longevity and reliability of optical cables in diverse environments.
Processing and Granulation

PE sheathing granules are blended with additives, extruded, and granulated using twin-screw extruders . Key processing considerations include:

  • Drying: Granules should be dried before extrusion, typically below 100°C.
  • Extruder settings: Minimum L/D ratio of 25 is recommended for uniform plasticization.
  • Extrusion speed: Controlled to ensure consistent sheath thickness and surface quality. Granules are typically packaged in 25 kg paper-plastic composite bags or 500–800 kg bulk polyethylene bags for storage and transport, avoiding moisture and direct sunlight .
Applications

These granules are used to produce optical fiber cable jackets, providing protection against mechanical damage, moisture ingress, and environmental stress. They are suitable for coaxial, telecom, and power cables as well . High-performance PE compounds are also used in aerial cables, underground cables, and specialty optical cables, where flexibility, durability, and flame-retardant properties are critical .

Summary

PE optical cable sheathing granules are versatile, high-quality polyethylene compounds, available in virgin or recycled forms, engineered for extrusion into durable, protective cable jackets. Selection of the appropriate PE type and compound formulation depends on mechanical, thermal, electrical, and environmental requirements, ensuring reliable performance in optical fiber and telecom applications.

PE optical cable sheathing granules

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