Polypropylene (PP) is in many aspects similar to polyethylene in both physical and electrical characteristics, but with improved thermal properties. Polypropylene is reasonably economical and can also be foamed to improve its electrical properties.
Polypropylene is susceptible to degradation from exposure to heat and UV radiation and is therefore not recommended for outdoor applications where exposure to sunlight is likely. Use of polypropylene as an insulation material for thin walls is typical within the wire and cable industry with an alternative material used as the final jacket.
Performance of Polypropylene (PP) for Wire and Cable Insulation and Jacketing
| Category | Rating |
|---|---|
| Temperature Range | -40°C to 80°C |
| Flame Resistance | Poor |
| Chemical Resistance | Fair |
| Durability | Fair |
| Flexibility | Poor |
| UV Resistance | Poor |
Polyethylene is suitable for both wire insulation and final cable jacketing.