| About |
|---|
| Celcon acetal copolymer grade M90TM is a medium viscosity polymer providing optimum performance in general purpose injection molding and extrusion of thin walled tubing and thin gauge film. This grade provides overall excellent performance in many applications. Chemical abbreviation according to ISO 1043-1: POM Please also see Hostaform® C 9021.&& |
| Product Description | |
|---|---|
| Supplier | Celanese |
| Generic | Copolymer Polyformaldehyde |
| Material Status | Commercial: Active |
| Availabilitys | North America,Latin America |
| Process Methods | Injection Molding |
| Technical Data | |||
|---|---|---|---|
| MECHANICAL | Nominal value | Unit | Test method |
| Tensile modulus | 2760 | MPa | ISO 527-2/1A/1 |
| tensile strength | ASTM D638 | ||
| yield | 65.0 | 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 | 10 | % | ISO 527-2/1A/50 |
| Tensile Creep Modulus（1 hr） | 2450 | MPa | ISO 899-1 |
| Tensile creep modulus | |||
| 1000 hr | 1350 | MPa | ISO 899-1 |
| Bending modulus | |||
| 23℃ | 2550 | MPa | ISO 178 |
| IMPACT | Nominal value | Unit | Test method |
|---|---|---|---|
| Charpy Notched Impact Strength | ISO 179/1eA | ||
| -30℃ | 6.0 | kJ/m² | ISO 179/1eA |
| 23℃ | 6.0 | kJ/m² | ISO 179/1eA |
| Charpy Unnotch Impact strength | ISO 179/1eU | ||
| -30℃ | 180 | kJ/m² | ISO 179/1eU |
| 23℃ | 190 | kJ/m² | ISO 179/1eU |
| Impact strength of cantilever beam notch | |||
| 23℃ | 5.7 | 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 | 101 | ℃ | ISO 75-2/A |
| 0.45 MPa, unannealed | 158 | ℃ | ISO 75-2/B |
| Melting peak temperature | 165 | ℃ | ASTM D3418 |
| Melting temperature | 165 | ℃ | ISO 11357-3 |
| Linear coefficient of thermal expansion | |||
| TD | 1.2E-4 | 1/℃ | ISO 11359-2 |
| MD | 1.2E-4 | 1/℃ | ISO 11359-2 |
| Effective Thermal Diffusivity | 0.0485 | cSt | Internal Method |
| Electrical performance | Nominal value | Unit | Test method |
|---|---|---|---|
| Surface resistivity | 3.0E+16 | ohms | IEC 60093 |
| Volume resistivity | 1.0E+14 | ohms·cm | ASTM D257 |
| Volume resistivity | 8.0E+14 | ohms·cm | IEC 60093 |
| PHYSICAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Density | 1.41 | g/cm³ | ASTM D792 |
| Density | 1.41 | g/cm³ | ISO 1183 |
| Melt Flow Rate | 9.0 | g/10min | ASTM D1238 |
| Melt Volume Rate | |||
| 190℃，2.16 kg | 8.00 | cm³/10min | ISO 1133 |
| Shrinkage rate | ISO 294-4 | ||
| TD | 1.8 | % | ASTM D955 |
| MD | 2.2 | % | ASTM D955 |
| TD | 1.9 | % | ISO 294-4 |
| MD | 2.0 | % | 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-Moderate | ||
| 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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