TPEE Celanese 8238
TPEE Celanese 8238
TPEE Celanese 8238 is a high‑hardness and high‑strength thermoplastic polyester elastomer. It also delivers excellent fatigue resistance and wear resistance, as well as good chemical resistance and high‑low temperature resistance.
Main Applications
Industrial Parts: Widely used for gears, sprockets, bearings, oil‑field components, etc. Its wear resistance and strength meet the requirements of continuous high‑load operation.
Wires & Cables: Applied as cable sheaths to protect inner wires.
Automotive Industry: Suitable for components such as air intake pipes.
Other Fields: Can also be extruded into films, sheets and profiles.
Physical Properties
| Test Item | Data | Unit | Test Standard |
|---|---|---|---|
| Physical Properties | |||
| Density | 1.28 | g/cm³ | ISO 1183 |
| MFR (240°C / 2.16 kg) | 13 | g/10 min | ISO 1133 |
| Water Absorption (23°C, 24hr) | 0.60 | % | ISO 62 |
| Mechanical Properties | |||
| Shore D Hardness | 76 | — | ISO 868 |
| Shore D Hardness (15s) | 70 | — | ISO 868 |
| Tensile Modulus | 1180 | MPa | ISO 527‑2 |
| Tensile Stress at Break | 46.0 | MPa | ISO 527‑2 |
| Tensile Strain at Break | ＞300 | % | ISO 527‑2 |
| Flexural Modulus | 1150 | MPa | ISO 178 |
| Tear Strength | 230 | kN/m | ISO 34‑1 |
| Charpy Notched Impact Strength (23°C) | 15 | kJ/m² | ISO 179/1eA |
| Izod Notched Impact Strength (23°C) | 11 | kJ/m² | ISO 180/1A |
| Thermal Properties | |||
| Melting Temperature | 221 | °C | ISO 11357‑3 |
| Vicat Softening Temperature (A50) | 213 | °C | ISO 306 |
| Heat‑Distortion Temperature (1.8 MPa) | 45.0 | °C | ISO 75‑2/A |
| Brittleness Temperature | ‑84.0 | °C | ISO 974 |
Processing Technology
| Process Parameter | Recommended Range | Critical Control Points |
|---|---|---|
| Drying Condition | 105℃ × 4‑6 h (dew point ‑40℃) | Moisture content ≤0.02% (prevent surface bubbles) |
| Melt Temperature | Injection: 220‑240℃; Extrusion: 210‑230℃ | Molecular degradation occurs above 250℃ |
| Mold Temperature | 80‑100℃ | Sink marks below 70℃; longer cycle time above 110℃ |
| Injection Pressure | 100‑150 MPa | High pressure ensures compactness for high‑fill parts |
| Screw Speed | 30‑60 rpm | High speed causes shear overheating (temperature rise ≤10℃) |
| Regrind Ratio | ≤20% (0.2% stabilizer required) | Wear resistance decreases ≤15% after three recycling cycles |
Note: All information above is for reference only!
