Production of highly filled flame retardant cable materials

Consistency, reproducibility and product purity are major requirements for the production of highly filled flame retardant cable materials (HFFR). Coperion's HFFR processing lines completely satisfy these requirements. Coperion is a specialist for such complete processing lines for HFFR – from raw material handling and feeding to compounding, pelletizing, cooling and packaging the pellets.

Typical applications

  • Halogen-free, self-extinguishing formulations for cables (HFFR)
  • Compounds for low, medium and high-voltage cables on an elastomer basis
  • Cross-linkable PE (mixing of peroxide)
  • Temperature and shear-sensitive products such as PVC insulations and sheaths,
  • XLPE and radiation cross-linkable plastics
  • Semiconductor compounds and special products which contain alloys and blends

Typical set-up for a plastics processing plant

Typical set-up for a HFFR processing plant - from raw material handling and feeding, dryblend production in the heat-cool mixer to the cooling and packaging of the pellets.

Comprehensive product range

Coperion two-stage-extruder Kombiplast total

Compounding Machines and Extruders

Coperion’s two-stage compounder Kombiplast consists of a twin screw extruder ZSK and a single shaft discharge screw ES-A. The Kombiplast system ensures highest product quality and maximum throughput rates. It combines optimal mixing properties with high process flexibility, gentle product handling and excellent venting. 

Feeding Equipment

Coperion K-Tron high accuracy loss-in-weight feeders can feed the right amount of each material to your extruder to deliver a consistent compound. An accurate formulation is the key to a high quality end product.  Consistent quality means less scrap and consistently accurate feeding of heavy fillers can help avoid undue stress for the extruder. Our state-of-the art Smart Force Transducer weighing technology means you can rely on Coperion K-Tron gravimetric feeders.

Coperion K-Tron Compounding Line

Material Handling Equipment

Coperion K-Tron’s many years of experience in HFFR compounding makes us the perfect equipment supplier for your HFFR process requirements. We can provide a complete material handling solution to deliver material from silo, bulk bags, or small bag dump stations to your process. Our system capabilities include our Series 2400 for moving your minor ingredients and continuous vacuum or pressure for conveying higher capacity ingredients to your process.

Coperion plastics processing plant

Plants and Systems

Coperion has many years of experience in the design of processing plants for the production of HFFR. With our comprehensive engineering know-how we offer HFFR processing lines that ensure a high level of operational reliability and safety.

Coperion service technician


Coperion and Coperion K-Tron service experts can visit your site to analyze areas such as spare parts stocks, maintenance, modernization or expansion. Our service consultants have the experience and specific know-how to quickly detect available potential, eliminate deficits or optimize processes.


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