PP‑R Korea Petrochemical RP2400
PP‑R Korea Petrochemical RP2400 Resin
Material Introduction: PP‑R Korea Petrochemical RP2400 is random‑copolymer polypropylene mainly for pipe application. It delivers outstanding long‑term heat‑resistant & pressure‑resistant performance and high toughness, specially suitable for cold‑hot‑water piping systems.
Main Applications
Building cold‑hot‑water systems: central heating system, domestic cold‑hot‑water pipelines.
Drinking‑water supply system: applicable for purified‑water delivery pipelines.
Heating system: floor heating, wall‑panel and radiant heating systems.
Central air‑conditioning piping system.
Industrial piping system: conveyance or discharge of chemical media.
Performance Parameters
| Performance Category | Test Item | Test Condition | Test Standard | Test Data | Unit | Remarks & Interpretation |
|---|---|---|---|---|---|---|
| Basic Properties | Density | ‑ | ASTM D‑1505 | 0.9 | g/cm³ | Typical PP‑R density. |
| Melt Flow Rate (MFR) | ‑ | ASTM D‑1238 | 0.25 | g/10min | Low flow grade designed for pipe extrusion. | |
| Water Absorption | ‑ | ASTM D‑570 | ＞0.01 | % | Low water‑absorption characteristic. | |
| Mechanical Properties | Tensile Yield Strength | ‑ | ASTM D‑638 | 230 | kgf/cm² | Tensile yield performance. |
| Elongation at Break | ‑ | ASTM D‑638 | ＞600 | % | Excellent ductility and toughness. | |
| Flexural Modulus | ‑ | ASTM D‑790 | 8500 | kgf/cm² | Material rigidity index. | |
| Rockwell Hardness | R‑scale | ASTM D‑785 | 72 | ‑ | Surface hardness. | |
| Notched IZOD Impact Strength | 23℃, Notched | ASTM D‑256 | 60 | kgf·cm/cm | Room‑temperature notch impact performance. | |
| Un‑Notched IZOD Impact Strength | Non‑Notched | ASTM D‑256 | NB(No Break) | kgf·cm/cm | Un‑notched specimen keeps intact under impact. | |
| Thermal Properties | Heat‑Distortion Temperature(HDT) | ‑ | ASTM D‑648 | 85 | ℃ | Heat‑distortion reference temperature. |
| Vicat Softening Point | ‑ | ASTM D‑1525 | 133 | ℃ | Vicat softening temperature. | |
| Melting Point | ‑ | ASTM D‑3418 | 139 | ℃ | Resin melting peak temperature. | |
| Long‑term Performance | Oxidation Induction Time(OIT) | 200℃ | ASTM D‑3895 | ＞30 | min | Good thermal‑oxidative aging resistance for pipe long‑term service. |
Injection‑Molding Process Parameters
- Barrel temperature：160
300℃（from feed zone to nozzle），typical melt temperature 220280℃。 - Mold temperature：20~70℃. Higher mold temperature improves surface gloss and dimensional stability.
- Injection pressure：80
140 MPa（8001400 bar）. Avoid over‑high pressure; higher pressure may be required for thin‑wall parts. - Holding pressure：30%‑60% of injection pressure.
- Back pressure：5
20 MPa（50200 bar）. - Injection speed：high speed for thin‑wall articles; medium speed for other products.
- Screw speed：high screw speed is permitted, linear velocity up to 1.3 m/s.
- Drying treatment：pre‑drying unnecessary under good storage; dry at 80℃ for 1‑2 h under poor storage condition.
Injection‑Molding Notes (General PP characteristics)
- RP2400 is crystalline polymer with large molding shrinkage（1%‑2.5%）, prone to sink mark, dent and deformation. Take consideration during mold design and process setting.
- Fast cooling rate. Runner & cooling system shall dissipate heat gently; strictly control molding temperature.
- Low melt temperature with high pressure may cause molecular orientation. Mold temperature below 50℃ leads to poor surface, bad weld‑line and flow mark; temperature above 90℃ may trigger warpage.
- Uniform wall‑thickness is required; avoid insufficient filling and sharp corner to prevent stress concentration.
Disclaimer: All above data is for reference only.
