Consistent Electrical Performance – IOTA HTV 327 for Insulating Profiles
Insulating profiles for power cable joints and terminations require materials that maintain their dielectric properties under heat, humidity, and electrical stress. The IOTA HTV 327 series, a platinum‑cured silicone rubber, is designed to deliver repeatable performance in these demanding environments.
This 43 Shore A compound exhibits a volume resistivity of 1.0×10¹⁵ Ω·cm and a dielectric strength of 23 kV/mm – values that support insulation coordination for systems up to 35 kV class. The dissipation factor of 0.0029 at 100 Hz indicates low hysteresis losses, contributing to cooler operation under load.
Mechanical robustness is validated by a tensile strength of 10.0 MPa and tear strength of 45 kN/m. These properties reduce the risk of damage during cable pulling, bending, or thermal cycling. The elongation of 900% accommodates dimensional changes in cable cores without loss of interfacial sealing.
The platinum vulcanization system offers advantages over peroxide‑cured alternatives: no by‑products that could corrode metal parts, faster cure cycles, and improved transparency for quality inspection. The recommended cure schedule – 130°C for 10 minutes plus post‑cure – is compatible with standard injection and extrusion equipment.
Production consistency is supported by a plasticity value of 150, ensuring stable feed and uniform cross‑sectional profiles. The density of 1.135 g/cm³ assists in weight‑based dosing and cost estimation.
Storage is straightforward: 20‑kg cartons, kept below 50°C, preserve the material for 6 months from manufacture. For manufacturers of cable accessories who prioritize electrical stability and processing ease, IOTA HTV 327 offers a well‑characterized, field‑proven silicone platform.