Delrin® 577 is a medium viscosity acetal homopolymer (Polyoxymethylene POM) containing 20% glass fiber filler for injection molding. It has very high stiffness, low warpage, and good creep resistance for superior performance at elevated temperature. It contains carbon black for improved weathering.
Polymer Name: Polyacetal Homopolymer (POM)
Processing Methods: Injection Molding
Fillers Included: Glass Fiber
Additives Included: Mold Release Agent
Flexural Modulus: 4600.0 MPa
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Identification & Functionality
Additives Included
Fillers Included
Polymer Name
Plastics & Elastomers Functions
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Delrin® 577 BK000 Features & Benefits
Applications & Uses
Markets
Applications
Plastics & Elastomers End Uses
Plastics & Elastomers Processing Methods
Properties
Mechanical Properties
| Value | Units | Test Method / Conditions | |
| Tensile Modulus | 4800 | MPa | ISO 527-1/-2 |
| Flexural Modulus | 4600 | MPa | ISO 178 |
| Poisson's Ratio | 0.36 | - | - |
| Stress (at Break) | 52 | MPa | ISO 527-1/-2 |
| Strain (at Break) | 10 | % | ISO 527-1/-2 |
| Notched Charpy Impact Strength (at 23°C) | 3 | kJ/m² | ISO 179/1eA |
| Notched Charpy Impact Strength (at -30°C) | 3 | kJ/m² | ISO 179/1eA |
Typical Properties
| Value | Units | Test Method / Conditions | |
| Resin Identification | POM-GF20 | - | ISO 1043 |
Thermal Properties
| Value | Units | Test Method / Conditions | |
| Melt Temperature (at 10°C/min) | 178 | °C | ISO 11357-1/-3 |
| Temperature of Deflection Under Load (1.8 Mpa) | 118 | °C | ISO 75-1/-2 |
| Temperature of Deflection Under Load (0.45 Mpa) | 164 | °C | ISO 75-1/-2 |
| Coefficient of Linear Thermal Expansion (Parallel) | 56 | E-6/K | ISO 11359-1/-2 |
| Coefficient of Linear Thermal Expansion (Normal) | 92 | E-6/K | ISO 11359-1/-2 |
| Relative Thermal Index (Electrical, 1.5mm) | 105 | °C | UL 746B |
| Relative Thermal Index (Electrical, 3mm) | 105 | °C | UL 746B |
| Relative Thermal Index (Electrical, 6mm) | 105 | °C | UL 746B |
| Relative Thermal Index (Impact, 1.5mm) | 85 | °C | UL 746B |
| Relative Thermal Index (Impact, 3mm) | 85 | °C | UL 746B |
| Relative Thermal Index (Impact, 6mm) | 85 | °C | UL 746B |
| Relative Thermal Index (Strength, 1.5mm) | 90 | °C | UL 746B |
| Relative Thermal Index (Strength, 3mm) | 90 | °C | UL 746B |
| Relative Thermal Index (Strength, 6mm) | 90 | °C | UL 746B |
Flammability
| Value | Units | Test Method / Conditions | |
| FMVSS Class | B | - | ISO 3795 (FMVSS 302) |
| Burning Behavior (at 1.5mm Nominal Thickness) | UL94 HB | class | IEC 60695-11-10 |
| Burning Behavior (at 3mm Thickness) | UL94 HB | class | IEC 60695-11-10 |
| Burning Rate (at 1mm Thickness) | max. 80 | mm/min | ISO 3795 (FMVSS 302) |
Other Properties
| Value | Units | Test Method / Conditions | |
| Density | 1560 | kg/m³ | ISO 1183 |
Processing Information (Injection Molding)
| Value | Units | Test Method / Conditions | |
| Drying Recommended | yes | - | - |
| Drying Temperature | 80 | °C | - |
| Drying Time (Dehumidified Dryer) | 2 - 4 | h | - |
| Processing Moisture Content | max. 0.2 | % | - |
| Hold Pressure Range | 80 - 100 | MPa | - |
| Hold Pressure Time | 8 | s/mm | - |
| Annealing Temperature | 160 | °C | - |
| Melt Temperature (Optimum) | 215 | °C | - |
| Melt Temperature (Minimum) | 210 | °C | - |
| Melt Temperature (Maximum) | 220 | °C | - |
| Maximum Screw Tangential Speed | 0.3 | m/s | - |
| Mold Temperature (Optimum) | 90 | °C | - |
| Mold Temperature (Minimum) | 80 | °C | - |
| Mold Temperature (Maximum) | 100 | °C | - |
| Annealing Time (Optional) | 30 | min/mm | - |
Rheological Properties
| Value | Units | Test Method / Conditions | |
| Melt Volume-Flow Rate (at 190°C, 2.16 kg) | 7 | cm³/10min | ISO 1133 |
| Mold Shrinkage (Parallel) | 1.7 | % | ISO 294-4, 2577 |
| Mold Shrinkage (Normal) | 1.1 | % | ISO 294-4, 2577 |
Regulatory & Compliance
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Viscosity vs Shear Rate
Shear Stress vs Shear Rate
Dynamic Shear Modulus vs Temperature
Specific Volume Temperature (pvT)
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Delrin® 577 BK000
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