Polypropylene Homopolymer (PP-H)
PP-H (Polypropylene homopolymer) is a thermoplastic polymer produced by polymerising propylene without adding copolymer components. It is characterised by high rigidity, good strength and stable processing. It is one of the most sought-after materials in industry thanks to its optimal balance of price and performance.
Key properties
- High rigidity
- Good mechanical strength
- Low density
- Excellent chemical resistance
- Good processability
- Low moisture absorption
Physical and mechanical properties (typical values) | |
Property | Typical values |
Density | 0.900 – 0.910 g/cm³ |
MFI (230°C / 2.16 kg) | 0.5 – 40 g/10 min (depending on grade) |
Tensile strength | 30 – 35 MPa |
Modulus of elasticity | 1300 – 1700 MPa |
Impact strength (Izod) | lower than copolymers |
Melting temperature | 160 – 165 °C |
Vicat softening temperature | 150 – 155 °C |
Values may vary depending on the manufacturer and grade.
Melt flow (MFI)
The melt flow index is chosen for the specific processing technology:
- 0.5 – 3 g/10 min — pipe and sheet extrusion
- 3 – 12 g/10 min — general-purpose injection moulding
- 20 – 40 g/10 min — thin-wall injection moulding
- Special grades (Raffia) — production of tapes and woven bags
Applications
- Rigid packaging
- Containers and crates
- Automotive parts
- Moulded products
- Sheets and film
- Fibres and tapes (raffia)
- Household products
- Technical housings
Advantages
- Higher rigidity than PP-R
- Better heat resistance
- Cost-effective material
- Suitable for most standard processing technologies
