| About |
|---|
| Kevlar® Modified High Viscosity Acetal Homopolymer with Low Wear and Low Friction&& |
| Product Description | |
|---|---|
| Supplier | DuPont |
| Generic | Paraformaldehyde |
| Material Status | Commercial: Active |
| Features | High Viscosity,Low coefficient of friction,Good wear resistance |
| Availabilitys | Africa & Middle East ,North America,Latin America,Asia Pacific,Europe |
| Technical Data | |||
|---|---|---|---|
| MECHANICAL | Nominal value | Unit | Test method |
| Tensile modulus | 3100 | MPa | ISO 527-2 |
| tensile strength | |||
| fracture | 65.0 | MPa | ISO 527-2 |
| Tensile strain | |||
| fracture | 15 | % | ISO 527-2 |
| Bending modulus | 3000 | MPa | ISO 178 |
| IMPACT | Nominal value | Unit | Test method |
|---|---|---|---|
| Charpy Notched Impact Strength | ISO 179/1eA | ||
| -30℃ | 3.5 | kJ/m² | ISO 179/1eA |
| 23℃ | 4.5 | kJ/m² | ISO 179/1eA |
| Charpy Unnotch Impact strength | ISO 179/1eU | ||
| -30℃ | 60 | kJ/m² | ISO 179/1eU |
| 23℃ | 50 | kJ/m² | ISO 179/1eU |
| THERMAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Hot deformation temperature | |||
| 1.8 MPa, unannealed | 98.0 | ℃ | ISO 75-2/A |
| 0.45 MPa, unannealed | 160 | ℃ | ISO 75-2/B |
| Melting temperature | 178 | ℃ | ISO 11357-3 |
| Linear coefficient of thermal expansion | |||
| TD | 1.0E-4 | cm/cm/℃ | ISO 11359-2 |
| MD | 1.1E-4 | cm/cm/℃ | ISO 11359-2 |
| MD, -40 to 23 ℃ | 9.4E-5 | cm/cm/℃ | ISO 11359-2 |
| TD, -40 to 23 ℃ | 9.2E-5 | cm/cm/℃ | ISO 11359-2 |
| annealing time | |||
| Optional | 30.0 | min/mm |
| FLAME CHARACTERISTICS | Nominal value | Unit | Test method |
|---|---|---|---|
| Burning rate | |||
| 1 mm | 34 | mm/min | ISO 3795 |
| FMVSS flame retardant rating | B | FMVSS 302 | |
| Fogging（Gvalue，condensate） | 2.0E-4 | g | ISO 6452 |
| Supplementary information | Nominal value | Unit | Test method |
|---|---|---|---|
| discharge | < 8.00 | mg/kg | VDA 275 |
| Emissions of organic compounds | 4.70 | µgC/g | VDA 277 |
| PHYSICAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Density | 1.41 | g/cm³ | ISO 1183 |
| Melt Volume Rate | |||
| 190℃，2.16 kg | 2.00 | cm³/10min | ISO 1133 |
| Shrinkage rate | ISO 294-4 | ||
| TD | 1.5 | % | ISO 294-4 |
| MD | 1.8 | % | ISO 294-4 |
| Melt density | 1.18 | g/cm³ |
| Process Conditions | |||
|---|---|---|---|
| Injection | Nominal value | Unit | Test method |
| extrusion | Nominal value | Unit | Test method |
| drying temperature | 80 | °C | |
| Drying time – hot air dryer | 2.0 to 4.0 | hr | |
| Recommended maximum moisture content | 0.20 | % | |
| Processing (melt) temperature | 210 to 220 | °C | |
| Melt Temperature, Optimal | 215 | °C | |
| Mold temperature | 80 to 100 | °C | |
| Mold Temperature, Optimal | 90 | °C | |
| Maintaining pressure | 90.0 to 110 | MPa | |
| Drying Recommended | yes | ||
| Hold Pressure Time | 8.00 | s/mm | |
| drying temperature | 75 to 85 | °C | |
| Drying time | 2.0 to 4.0 | hr | |
| Recommended maximum moisture content | 0.20 | % | |
| Melt Temperature | 195 to 205 | °C | |
| Extension Melt Temperature, Optimal | 200 | °C | |
| Notes |
|---|
| 1. Typical properties: these are not to be construed as specifications. |
| 2. 10°C/min |
| 3. FMVSS 302 |
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