| About |
|---|
| Celcon® GB25 acetal copolymer is a 25% glass bead filled grade for low shrinkage and warp resistance in large, flat and thin walled parts. Chemical abbreviation according to ISO 1043-1: POM&& |
| Product Description | |
|---|---|
| Supplier | Celanese |
| Generic | Copolymer Polyformaldehyde |
| Material Status | Commercial: Active |
| Features | Low warping,Low contractility |
| Availabilitys | North America,Latin America |
| Technical Data | |||
|---|---|---|---|
| PHYSICAL | Nominal value | Unit | Test method |
| Density | 1.62 | g/cm³ | ASTM D792 |
| Density | 1.58 | g/cm³ | ISO 1183 |
| Melt Volume Rate | |||
| 190℃，2.16 kg | 13.0 | cm³/10min | ISO 1133 |
| Shrinkage rate | ISO 294-4 | ||
| TD | 1.4 | % | ASTM D955 |
| MD | 1.6 | % | ASTM D955 |
| TD | 1.3 | % | ISO 294-4 |
| MD | 1.5 | % | ISO 294-4 |
| Water absorption rate | |||
| Saturation, 23 ℃ | 0.65 | % | ISO 62 |
| Equilibrium, 23 ℃, 50% RH | 0.20 | % | ISO 62 |
| MECHANICAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Tensile modulus | 3700 | MPa | ISO 527-2/1A/1 |
| tensile strength | ASTM D638 | ||
| yield | 49.0 | MPa | ISO 527-2/1A/50 |
| Yield, -40 ℃ | 73.1 | MPa | ASTM D638 |
| Yield, 23 ℃ | 46.2 | MPa | ASTM D638 |
| Yield, 82 ℃ | 26.2 | MPa | ASTM D638 |
| Tensile strain | |||
| yield | 4.0 | % | ISO 527-2/1A/50 |
| Bending modulus | |||
| 23℃ | 3600 | MPa | ISO 178 |
| IMPACT | Nominal value | Unit | Test method |
|---|---|---|---|
| Charpy Notched Impact Strength | ISO 179/1eA | ||
| -30℃ | 2.2 | kJ/m² | ISO 179/1eA |
| 23℃ | 2.4 | kJ/m² | ISO 179/1eA |
| Impact strength of cantilever beam notch | |||
| 23℃ | 2.6 | kJ/m² | ISO 180-1A |
| THERMAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Hot deformation temperature | |||
| 1.8 MPa, unannealed | 118 | ℃ | ASTM D648 |
| 1.8 MPa, unannealed | 105 | ℃ | ISO 75-2/A |
| Melting peak temperature | 166 | ℃ | ASTM D3418 |
| Melting temperature | 165 | ℃ | ISO 11357-3 |
| Linear coefficient of thermal expansion | |||
| TD | 8.0E-5 | 1/℃ | ISO 11359-2 |
| MD | 7.0E-5 | 1/℃ | ISO 11359-2 |
| 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 | 90 to 120 | °C | |
| Injection pressure | 90.0 to 140 | MPa | |
| Injection speed | Slow | ||
| Hold pressure | 90.0 to 140 | MPa | |
| Back pressure | 0.00 to 2.00 | MPa | |
| Notes |
|---|
| 1. Typical properties: these are not to be construed as specifications. |
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