PP Homopolymer for General Injection Molding
A high-stiffness polypropylene homopolymer from leading Chinese mills, designed for general-purpose injection molding. Excellent flow balance, good dimensional stability, and reliable processing make HP550J the workhorse grade for everyday housewares, toys, thin-wall parts, and returnable crates.
Typical property values for guidance. Certified lot-specific COA provided with every shipment.
| Property | Test Method | Unit | Typical Value |
|---|---|---|---|
| Melt Flow Rate | ASTM D1238 | g/10min | 3.5 |
| Density | ASTM D1505 | g/cm³ | 0.905 |
| Tensile Strength (Yield) | ASTM D638 | MPa | 35 |
| Elongation at Break | ASTM D638 | % | 50 |
| Flexural Modulus | ASTM D790 | MPa | 1500 |
| Notched Izod Impact (23°C) | ASTM D256 | kJ/m² | 3.5 |
| Rockwell Hardness | ASTM D785 | R scale | 100 |
| Vicat Softening Temperature | ASTM D1525 | °C | 155 |
| Heat Deflection Temperature (0.45 MPa) | ASTM D648 | °C | 110 |
Test condition: 230°C / 2.16 kg for MFR. Values are typical and not intended as specification limits.
HP550J is suited to a broad range of rigid injection-molded parts where stiffness, surface finish, and cost-efficiency matter.
Containers, cups, basins, kitchen utensils, and storage items requiring stiffness and good surface gloss.
Safe, non-toxic, easy-colorable molded toys with good impact and dimensional stability.
Thin-wall containers and disposable cups where fast cycle times and flow are essential.
Lightweight rigid crates and bins where stiffness and stack strength are prioritized.
HP550J processes easily on standard injection molding equipment. Use the guideline below as a starting point; fine-tune to your specific mold and cycle.
| Melt Temperature | 180 – 220 °C |
| Mold Temperature | 20 – 50 °C |
| Injection Pressure | 60 – 100 MPa |
| Screw Speed | 40 – 80 rpm |
| Drying (if needed) | 70 °C / 1–2 h |
Standard mill packaging protects resin integrity through ocean and inland transit to your destination port.
25 kg woven PP bag with inner PE liner. 1,000 kg (1 MT) per pallet, stretch-wrapped.
1,000 kg bulk bag for high-volume converters seeking reduced packaging waste.
Each shipment includes mill COA, MSDS, packing list, and certificate of origin. Third-party SGS/BV inspection available on request.
Tell us your volume, destination port, and packaging preference. We'll respond within 24 hours with mill-direct pricing and current availability from our mill partners.