PP‑R Daqing PPB4228
Daqing Refining & Chemical PPB4228 Resin
Material Introduction: Daqing Refining & Chemical PPB4228 is impact‑modified random‑copolymer polypropylene (PP‑R). It delivers balanced low‑temperature toughness and rigidity. Benefiting from excellent impact resistance and heat resistance, combined with block‑copolymer PP (PPB) characteristics, it exhibits favorable pressure‑bearing performance for pipe applications.
Main Applications
Suitable for extrusion of pipes and profiles, widely used in building materials industry, especially for cold‑hot‑water pipes and heating pipes.
Performance Parameters
| Performance Category | Test Item | Test Condition | Typical Value | Unit | Remarks & Interpretation |
|---|---|---|---|---|---|
| Physical Properties | Melt Flow Rate (MFR) | 230℃, 2.16 kg | 0.37 | g/10 min | Low‑flow grade for pipe extrusion. |
| Mechanical Properties | Tensile Yield Stress | ‑ | ≥23.2 | MPa | Tensile yield performance. |
| Flexural Modulus | ‑ | ≥921 | MPa | Stiffness index. | |
| Izod Notched Impact Strength | -20℃ | 6.6 | kJ/m² | Low‑temperature impact resistance. |
Pipe Extrusion Process Parameters
| Process Item | Typical Reference Range | Remarks |
|---|---|---|
| Drying temperature / time | 80‑90℃ / 2‑3 h | Low moisture absorption for PP; drying stabilizes pipe appearance and performance. |
| Extruder barrel zone 1(feed section) | 180‑190℃ | ‑ |
| Extruder barrel zone 2(compression section) | 190‑210℃ | ‑ |
| Extruder barrel zone 3(metering section) | 210‑220℃ | ‑ |
| Head & die temperature | 210‑230℃ | Ensure homogeneous melt flow and reduce internal stress. |
| Screw speed | Adjust by pipe diameter & output | Match with haul‑off speed for stable dimension. |
| Haul‑off speed | Constant, synchronized with extrusion speed | ‑ |
| Sizing method | Vacuum sizing & water cooling | Guarantee pipe roundness and smooth inner / outer surface. |
Disclaimer: All above data is for reference only.
