| About |
|---|
| Celcon® acetal copolymer grade M25 is a high molecular weight, higher toughness and impact resistance grade primarily used for extrusion and selected injection molding applications. Chemical abbreviation according to ISO 1043-1: POM Please also see Hostaform® C 2521.&& |
| Product Description | |
|---|---|
| Supplier | Celanese |
| Generic | Copolymer Polyformaldehyde |
| Material Status | Commercial: Active |
| Features | Good flexibility,High molecular weight |
| Availabilitys | North America,Latin America |
| Process Methods | Extrusion |
| Technical Data | |||
|---|---|---|---|
| MECHANICAL | Nominal value | Unit | Test method |
| Tensile modulus | 2460 | MPa | ISO 527-2/1A/1 |
| tensile strength | ASTM D638 | ||
| yield | 63.0 | MPa | ISO 527-2/1A/50 |
| Yield, -40 ℃ | 94.5 | MPa | ASTM D638 |
| Yield, 23 ℃ | 60.7 | MPa | ASTM D638 |
| Yield, 71 ℃ | 34.5 | MPa | ASTM D638 |
| Tensile strain | |||
| yield | 12 | % | ISO 527-2/1A/50 |
| Tensile Creep Modulus（1 hr） | 2100 | MPa | ISO 899-1 |
| Tensile creep modulus | |||
| 1000 hr | 1100 | MPa | ISO 899-1 |
| Bending modulus | |||
| 23℃ | 2430 | MPa | ISO 178 |
| IMPACT | Nominal value | Unit | Test method |
|---|---|---|---|
| Charpy Notched Impact Strength | |||
| 23℃ | 9.1 | kJ/m² | ISO 179/1eA |
| Charpy Unnotch Impact strength | ISO 179/1eU | ||
| -30℃ | 190 | kJ/m² | ISO 179/1eU |
| 23 ℃, localized fracture | 250 | kJ/m² | ISO 179/1eU |
| Impact strength of cantilever beam notch | |||
| 23℃ | 8.3 | kJ/m² | ISO 180-1A |
| THERMAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Hot deformation temperature | |||
| 1.8 MPa, unannealed | 110 | ℃ | ASTM D648 |
| 1.8 MPa, unannealed | 94.0 | ℃ | ISO 75-2/A |
| Melting peak temperature | 165 | ℃ | ASTM D3418 |
| Melting temperature | 166 | ℃ | ISO 11357-3 |
| Linear coefficient of thermal expansion | |||
| TD | 1.2E-4 | 1/℃ | ISO 11359-2 |
| MD | 1.2E-4 | 1/℃ | ISO 11359-2 |
| Electrical performance | Nominal value | Unit | Test method |
|---|---|---|---|
| Volume resistivity | 1.0E+14 | ohms·cm | ASTM D257 |
| PHYSICAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Density | 1.41 | g/cm³ | ASTM D792 |
| Density | 1.41 | g/cm³ | ISO 1183 |
| Melt Flow Rate | 2.5 | g/10min | ASTM D1238 |
| Melt Volume Rate | |||
| 190℃，2.16 kg | 2.20 | cm³/10min | ISO 1133 |
| Shrinkage rate | ISO 294-4 | ||
| TD | 1.8 | % | ASTM D955 |
| MD | 2.2 | % | ASTM D955 |
| TD | 1.8 | % | ISO 294-4 |
| MD | 2.2 | % | ISO 294-4 |
| Water absorption rate | |||
| Saturation, 23 ℃ | 0.75 | % | ISO 62 |
| Equilibrium, 23 ℃, 50% RH | 0.20 | % | ISO 62 |
| Density of Melt | 1.200 | g/cm³ | Internal Method |
| Specific Heat Capacity of Melt | 2210 | J/kg/℃ | Internal Method |
| Thermal Conductivity of Melt | 0.16 | W/m/K | Internal Method |
| Process Conditions | |||
|---|---|---|---|
| injection | Nominal value | Unit | Test method |
| Drying temperature | 80 to 100 | °C | |
| Drying time | 3.0 | hr | |
| Barrel rear temperature | 170 to 180 | °C | |
| Barrel middle temperature | 180 to 190 | °C | |
| Barrel front temperature | 180 to 190 | °C | |
| Nozzle temperature | 190 to 200 | °C | |
| Processing (melt) temperature | 180 to 200 | °C | |
| Mold temperature | 80 to 120 | °C | |
| Injection pressure | 60.0 to 120 | MPa | |
| Injection speed | Slow | ||
| Hold pressure | 60.0 to 120 | MPa | |
| Back pressure | 0.00 to 4.00 | MPa | |
| Ejection temperature | 140 | °C | |
| Notes |
|---|
| 1. Typical properties: these are not to be construed as specifications. |
| 2. 10°C/min |
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