Polypropylene (PP) – Material Description
Polypropylene (PP) is a semi-crystalline thermoplastic polymer widely used due to its chemical resistance, low cost, and lightweight nature. It is especially popular in packaging, consumer goods, automotive, and chemical processing industries.
🔹 General Properties of Polypropylene
| Property | Description |
|---|---|
| Density | ~0.90 g/cm³ (very lightweight) |
| Tensile Strength | Moderate – not as strong as nylon or acetal |
| Flexibility | Good fatigue resistance (e.g., living hinges) |
| Impact Resistance | Moderate (higher in copolymer grades) |
| Chemical Resistance | Excellent – resists acids, bases, solvents, and most chemicals |
| Water Absorption | Very low – good dimensional stability |
| Temperature Resistance | Up to ~100°C continuous use (~130°C short-term) |
| Electrical Properties | Excellent electrical insulator |
| Cost | Low |
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