A Concise Look at the History and Properties of Silicon Rubber for Wires and Cables

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Wire and cable extrusion is a manufacturing process needed to shape molten plastics. Although there are so many processes available to shape plastic as required by the market, the most favored one is dedicated to thermoplastic and thermosetting materials such as silicon. 

A look at the silicon history 

The delivery of the first-ever shipment of silicon rubber was made in 1945. The early silicon rubber used to have:

  • An unusual thermal stability
  • Fair electrical properties over a wide temperature range, and
  • Resistance to corona and weathering. 

Their utility as cable insulation was highly restricted, by substandard physical strength as well as fabrication-related difficulties. In those years, only a few hundred pounds per month of silicone rubber were used for wire and cable insulation. Now with the new-age technology provided by the leading screws and barrels supplier and dual take up machine manufacturers, the entire scenario is changed. 

Customized wire and cable extrusion lines for customized products 

Today, be it thermoplastic extrusion for cables or silicon cable extrusion, solutions are customized to meet specific requirements using the following extrusion lines provided by the leading screw and barrels and dual take up machine manufacturers in India:

  • Automotive wire insulation
  • Medium and high voltage sheathing
  • Aerospace insulation and sheathing
  • High-temperature lines
  • Steel wire and ropes covering
  • Electronic and building wire insulation and sheathing,
  • Cable sheathing in tandem with SZ stranding process
  • Photovoltaic wire insulation and sheathing
  • Power cable insulation and sheathing
  • Lan & telephone insulation and sheathing, and
  • Coaxial cables insulation and sheathing.

The properties of silicone rubbers used for wires and cables

The properties of silicon rubber used for making wires and cables on extrusion lines made and supplied by the leading screw and barrels manufacturers hugely vary and comprehensive research is required to settle for the best combination of properties. This properties of the silicone rubbers are primarily based on the nature of the silicone polymer that includes:

  • Low-temperature flexibility
  • Thermal stability 
  • Oil and solvent resistance
  • Corona, ozone and weather resistance, and 
  • Non-adhesiveness to organic materials.

The properties of silicon rubber used for making wires and cables that are dependent upon the type and amount of fillers compounded into the polymer include:

  • Color and Specific gravity
  • Elongation Tensile strength
  • Durometer Tear strength 
  • Dielectric properties
  • Compression set
  • Expansion coefficient
  • Moisture resistance
  • Chemical resistance, and
  • Thermal conductivity.

The contemporary silicon wire and cable extrusion lines made and supplied by the leading screw and barrels and dual take up machine manufacturers are well known for their high levels of productivity and flexibility. You are provided with modern and updated software technologies and top-quality resistant components as per your industry requirements.

Concluding note 

Supermac is a leading screw and barrels and dual take up machine manufacturer in India. The company has been a technological leader in the manufacturing of extrusion machines since 1974. Apart from extrusion lines, the company offers a complete range of crossheads, caterpillars, capstans, screws & barrels, take-ups, and pay-offs. As a specialist in providing customized and cutting-edge solutions, the company has earned a tremendous reputation of trust among business leaders across the globe.