PP‑R Yanshan Petrochemical 4220
PP‑R Yanshan Petrochemical 4220 Resin
Material Introduction: PP‑R Yanshan Petrochemical 4220 is random‑copolymer polypropylene mainly for pipe applications, especially for building cold‑hot‑water systems.
Main Applications
Building cold‑hot‑water systems: core application, including central heating systems.
Industrial piping systems: conveyance or discharge of chemical media.
Variant grade K4220: also applicable for indoor articles, rigid packaging consumables such as cups, thin‑wall parts and toys.
Performance Parameters
| Performance Category | Test Item | Test Condition | Test Standard | K4220/R4220 Value | C4220 Value | Unit | Remarks & Interpretation |
|---|---|---|---|---|---|---|---|
| Basic Properties | Density | ‑ | ‑ | 0.9013 | 0.893 | g/cm³ | Density difference among sub‑grades. |
| Melt Flow Rate (MFR) | ‑ | ‑ | 0.30 | 0.36 | g/10 min | Low‑flow pipe‑extrusion grade. | |
| Mechanical Properties | Tensile Yield Strength | ‑ | ‑ | 28 | 21.3 | MPa | Tensile yield performance. |
| Elongation at Break | ‑ | ‑ | 350(770) | 747 | % | Ductility index. | |
| Flexural Modulus | ‑ | ‑ | 650 | ‑ | MPa | Material rigidity. | |
| Izod Notched Impact Strength | 23℃ | ‑ | NB(No Break) | 25 | kJ/m² | Room‑temperature notch impact. | |
| Izod Notched Impact Strength | 0℃ | ‑ | 18 | ‑ | kJ/m² | Zero‑temperature impact resistance. | |
| Izod Notched Impact Strength | -20℃ | ‑ | 5 | 1.5 | kJ/m² | Low‑temperature notch impact. | |
| Rockwell Hardness | R‑scale | ‑ | 76(R) | 73(R) | ‑ | Surface hardness. | |
| Thermal Properties | Heat‑Distortion Temperature(HDT) | ‑ | ‑ | 78 | 94 | °C | Thermal deformation reference. |
| Vicat Softening Point | ‑ | ‑ | 131 | 121 | °C | Vicat softening temperature. | |
| Melting Point | DSC | ‑ | 143 | ‑ | ℃ | DSC melting peak. |
Injection‑Molding & Extrusion Process Parameters
‑Processing method: extrusion(mainly for pipes) or injection‑molding(for pipe fittings and other articles). ‑Barrel temperature: recommended 180~220℃. ‑Mold temperature: 40‑80℃. ‑Injection pressure: 700‑1000 bar, adjust according to product structure and wall‑thickness. ‑Injection speed: medium‑high speed is recommended. ‑Drying treatment: drying is generally unnecessary. If moisture absorption occurs due to improper storage, dry at 80℃ for 1‑2 h.
Disclaimer: All above data is for reference only.
