Other Names:
Propylene Resin, Homopolymer Polypropylene, Polypropene, RPP, Celgard
Specification Summary
- Purity: Typically ≥99%
- Form: Granules, pellets, powder, or sheets
- CAS No.: 9003-07-0
- Molecular Formula: (C3H6)n
- Molecular Weight: Variable (commonly 42.08 g/mol per repeating unit)
Product Description
Polypropylene (PP) is a semi-crystalline thermoplastic polymer recognized for its white, translucent appearance and odorless nature. It is insoluble in water and most polar solvents but dissolves in some organic nonpolar solvents such as xylene at elevated temperatures. PP is non-corrosive, non-toxic, and exhibits neither acidic nor alkaline characteristics. It is highly resistant to chemical attack, offers excellent dielectric properties, and maintains mechanical integrity across a wide temperature range.
Polypropylene Specification Table
| Property | Value/Description |
| Density | 0.89–0.92 g/cm³ |
| Melting Point | 157 °C |
| Water Absorption (24 hrs) | <0.01% |
| Tensile Strength at Yield | 13 MPa (ISO 527) |
| Elongation at Break | >210% (ISO 527) |
| Flexural Modulus | 360 MPa (ISO 178) |
| Hardness | 54 Shore D (ISO 868) |
| Dielectric Constant (1 MHz) | 1.5 |
| Volume Resistivity | >10¹⁶ Ω·cm |
| Heat Deflection Temperature | ~100 °C |
| Chemical Resistance | Excellent (acids, bases, solvents) |
| Appearance | White/translucent, odorless |
Downloadable TDS:
A comprehensive Technical Data Sheet (TDS) is available for download, providing detailed specifications, processing guidelines, and compliance information.
Application Sectors and Industries of Polypropylene
Automotive:
Polypropylene is extensively used in automotive interiors, battery cases, bumpers, and under-hood components due to its excellent impact resistance, lightweight nature, and chemical stability. Its ability to be easily molded into complex shapes makes it ideal for both structural and aesthetic parts.
Packaging:
PP is a preferred material for rigid and flexible packaging, including food containers, bottles, caps, and films. Its moisture resistance, food contact safety, and clarity make it suitable for preserving product integrity and extending shelf life.
Medical and Healthcare:
Used in syringes, medical vials, pill bottles, and laboratory equipment, PP offers high chemical resistance and can withstand sterilization processes. Its non-toxic, non-reactive nature ensures safety in direct contact with pharmaceuticals and biological materials.
Textiles and Nonwovens:
Polypropylene fibers are widely used in the production of carpets, upholstery, geotextiles, and disposable hygiene products. The polymer’s hydrophobicity and durability contribute to product longevity and performance.
Electrical and Electronics:
PP is utilized for insulation in cables, capacitors, and electrical housings due to its excellent dielectric properties and resistance to tracking and moisture.
Construction:
In construction, polypropylene is found in piping systems, insulation panels, and protective barriers. Its resistance to corrosion and chemical attack ensures long-term performance in demanding environments.
Consumer Goods:
Household items such as storage containers, furniture, toys, and appliances benefit from PP’s toughness, ease of coloring, and cost-effectiveness.
Industrial Applications:
PP is used for chemical tanks, pump components, and linings due to its resistance to a wide range of chemicals and its ability to maintain mechanical properties under stress.
Agriculture:
Polypropylene is used in greenhouse films, twines, ropes, and irrigation components. Its UV stability (when stabilized) and resistance to moisture and chemicals make it suitable for outdoor use.
Alternative Energy:
PP is increasingly used in battery separators, solar panel components, and wind turbine parts, where chemical resistance, lightweight, and electrical insulation are critical.
Packaging Types
- 25 kg Bags: Standard for granules and pellets, moisture-protected and easy to handle.
- Bulk Bags (FIBC): For large-scale industrial use, typically 500–1000 kg per bag, suitable for automated handling.
- Drums: Used for powder or specialty grades, providing protection from contamination and moisture.
- Custom Packaging: Tailored to customer requirements, including pre-cut sheets, rolls, or injection-molded parts for specific applications.
Polypropylene (PP) stands as a versatile engineering thermoplastic, offering a unique combination of mechanical, thermal, and chemical properties that cater to a broad spectrum of industrial and consumer applications. For more technical details and compliance information, please refer to the downloadable TDS.
