PP (Polypropylene)
PP (Polypropylene)
🔹 PP (Polypropylene) — Comprehensive Definition
Full Name: Polypropylene
Abbreviation: PP
Recycling Code: ♷ (5)🧪 Chemical Composition
Polypropylene (PP) is a thermoplastic polymer made from the polymerization of propylene (C₃H₆).
It belongs to the polyolefin family, sharing similarities with polyethylene but offering higher temperature resistance and stiffness.
Chemical formula: (C₃H₆)ₙ⚙️ Technical Properties
Property Description / Value Density 0.90 – 0.91 g/cm³ Melting Point 160–170°C Tensile Strength 30–40 MPa Impact Resistance Good (improved in copolymers) Chemical Resistance Excellent to most acids, bases, and solvents Thermal Resistance Up to 100°C continuous use Recyclability Very good 🧴 Main Applications
Food containers and packaging
Bottle caps and closures
Automotive parts (bumpers, dashboards)
Household goods and furniture
Fibers for carpets, ropes, and industrial fabrics
Medical equipment and laboratory ware
♻️ Recycling Process
Recycling of PP includes:
Collection and sorting
Cleaning and shredding
Melting and reprocessing into pellets
Recycled PP (rPP) is used in:
Automotive components
Plastic pallets and crates
Construction materials and containers
🌍 Environmental Considerations
