Polypropylene Homopolymer (PP-H)
PP-H (Polypropylene Homopolymer) — is a thermoplastic polymer produced by the polymerization of propylene without the addition of copolymer components. It is characterized by high stiffness, good strength, and processing stability. It is one of the most in-demand materials in the industry due to its optimal balance of price and performance characteristics.
Key Features
- High stiffness
- Good mechanical strength
- Low density
- Excellent chemical resistance
- Good processability
- Low water 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 |
Flexural Modulus | 1300 – 1700 MPa |
Impact Strength (Izod) | lower than copolymers |
Melting Point | 160 – 165 °C |
Vicat Softening Temperature | 150 – 155 °C |
Values may vary depending on the manufacturer and the specific grade.
Melt Flow Index (MFI)
The melt flow rate is selected for specific technologies:
- 0.5 – 3 g/10 min — pipe and sheet extrusion
- 3 – 12 g/10 min — general-purpose injection molding
- 20 – 40 g/10 min — thin-wall injection molding
- Special grades (Raffia) — production of tapes and woven bags
Applications
- Rigid packaging
- Containers and crates
- Automotive parts
- Injection-molded products
- Sheets and films
- Fibers and tapes (raffia)
- Household goods
- Technical housings
Advantages
- Higher stiffness compared to PP-R
- Better thermal resistance
- Cost-effective material
- Suitable for most standard processing technologies
