UHMWPE Celanese 4113
UHMWPE Celanese 4113 Resin
Material Introduction: UHMWPE Celanese 4113 is an ultra‑high‑molecular‑weight polyethylene powder. It is famous for extremely high wear resistance, outstanding impact resistance, low friction coefficient and self‑lubricating property. It is especially suitable for compression‑molding processing. Due to ultra‑high molecular weight at multi‑million level, UHMWPE exhibits extremely high melt viscosity, so conventional melt‑processing methods such as injection molding and extrusion for ordinary plastics cannot be adopted.
Main Applications
Wear‑resistant parts and liners: silo liners, chute linings, wear‑resistant plates, guide rails, artificial ski‑run surfaces, etc. Its wear‑resistant service life is far superior to carbon steel and other plastics.
Mechanical components: gears, bearings, shaft sleeves, star wheels, sliding blocks, etc. Its self‑lubricating property can reduce or even eliminate lubricant usage.
Transportation industry: high‑impact‑resistance components such as bumpers and vehicle floor panels.
Other fields: sports equipment (ski‑board bases), medical implants (artificial joints), corrosion‑resistant parts for chemical industry.
Performance Parameters
| Performance Category | Test Item | Test Standard | Data / Range | Unit |
|---|---|---|---|---|
| Physical Properties | Density | ASTM D792 / ISO 1183 | 0.928‑0.930 | g/cm³ |
| Viscosity Number | ISO 307 | 1900 | cm³/g | |
| Intrinsic Viscosity | ISO 1628‑3 | 17 | dl/g | |
| Mechanical Properties | Tensile Yield Strength (23°C) | ASTM D638 / ISO 527 | 21.4‑22.0 | MPa |
| Elongation at Break | ISO 527 | ＞50 | % | |
| Tensile Modulus | ISO 527 | 800 | MPa | |
| Shore Hardness D | ASTM D2240 / ISO 868 | 62‑64 | ‑ | |
| Dynamic Friction Coefficient (vs. steel) | Internal Method | 0.10 | ‑ | |
| Notched Impact Strength (23°C) | ISO 179/1eA | No break | ‑ | |
| Cantilever Beam Impact Strength | ISO 11542‑2 | 170 | kJ/m² | |
| Thermal Properties | Heat‑Deflection Temperature (0.45 MPa) | ISO 75‑2/B | 65.0 | °C |
| Heat‑Deflection Temperature (1.8 MPa) | ISO 75‑2/A | 42.0 | °C | |
| Vicat Softening Temperature | ASTM D1525 / ISO 306 | 80.0 | °C | |
| Coefficient of Linear Thermal Expansion | ASTM D696 | 2.0 × 10⁻⁴ | cm/cm/°C | |
| Electrical Properties | Volume Resistivity | ASTM D257 | ＞1.0 × 10¹⁵ | Ω·cm |
| Dielectric Strength | IEC 60243‑1 | 45 | kV/mm | |
| Dielectric Constant (100 Hz) | IEC 60250 | 2.10 | ‑ | |
| Others | Flame Retardant Grade (1.6 mm) | UL94 | HB | ‑ |
Compression Molding Process
- Charging: Fill UHMWPE powder into mold with specific shape.
- Heating and Pressurizing: Heat the mold above melting point (e.g.180‑220°C) under press, compact powder particles and expel entrapped air.
- Pressure‑holding & Sintering: Hold at set temperature and pressure for sufficient time to sinter materials into dense monolithic parts.
- Cooling and Demolding: Cool under pressure for shaping, then demold to obtain finished articles.
Processing Notes
- Equipment requirement: For extrusion or injection molding, equipment modification or UHMWPE‑dedicated machines (extruders with powerful feeding and special screw structure) are generally required.
- Raw‑material pretreatment: UHMWPE has low moisture absorption (water absorption＜0.01%). Drying at 80°C for 1‑2 hours is recommended under humid storage condition to reduce internal bubbles and surface defects.
- Shrinkage: UHMWPE has large molding shrinkage, which shall be fully considered in mold design.
- Degradation prevention: Despite good thermal stability, excessive processing temperature and prolonged heating time shall be avoided to prevent oxidative degradation.
Disclaimer: All above data is for reference only.
