Bakelite® EP 8412 | EP-(GF+X) | Momentive Specialty Chemicals
Product Texts
Product description:
Epoxy moulding compound, inorganically filled, glass fibre reinforced, heat resistant, dimensionally stable, good electric and mechanical properties, very good chemical resistance, low viscosity, UL listed (RTI 155°C).
Application areas:
Encapsulation of electric parts, e. g. electromagnet coil.
| Property Name | Value | Unit | Standard No. |
|---|
| Apparent density (moulding compound) | 0.85 | g/cm³ | ISO 60 |
| Moulding shrinkage (injection moulding, longitudinal) | 0.3 | % | ISO 2577 |
| Post shrinkage (injection moulding, 168h/110°C) | 0.05 | % | ISO 2577 |
| Moulding shrinkage (compression moulding, longitudinal) | 0.2 | % | ISO 2577 |
| Post shrinkage (compression moulding, 168h/110°C) | 0.01 | % | ISO 2577 |
| Tensile strength (5mm/min) | 55 | MPa | ISO 527-1/2 |
| Compr. strength (test spec. flat tested) | 170 | MPa | ISO 604 |
| Flexural strength (2mm/min) | 120 | MPa | ISO 178 |
| Flexural modulus | 15000 | MPa | ISO 178 |
| Ball indentation hardness (H 961/30) | 400 | MPa | ISO 2039/P1 |
| Water absorption (24h/23°C) | 6 | mg | similar to ISO 62 |
| Additional characteristics: | UL, LB, .5, D |
Preparation of Test Specimens of Thermosetting Moulding Compound
- Compression to ISO 295
- Injection to ISO 10724
Storage capability
6 months (relative humidity of 50-60% and maximum storage temperature of approximately 20°C)
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| Rheological properties | Value | Unit | Test Standard |
| Molding shrinkage (parallel) | 0.3 | % | ISO 294-4, 2577 |
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| Mechanical properties | Value | Unit | Test Standard |
| Tensile Modulus | 13000 | MPa | ISO 527-1/-2 |
| Charpy impact strength (+23°C) | 8.5 | kJ/m² | ISO 179/1eU |
| Charpy notched impact strength (+23°C) | 3.8 | kJ/m² | ISO 179/1eA |
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| Thermal properties | Value | Unit | Test Standard |
| Temp. of deflection under load (8.00 MPa) | 120 | °C | ISO 75-1/-2 |
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| Electrical properties | Value | Unit | Test Standard |
| Relative permittivity (100Hz) | 5.5 | - | IEC 60250 |
| Dissipation factor (100Hz) | 0.02 | E-4 | IEC 60250 |
| Volume resistivity | 1E11 | Ohm*m | IEC 60093 |
| Surface resistivity | 1E12 | Ohm | IEC 60093 |
| Electric strength | 29 | kV/mm | IEC 60243-1 |
| Comparative tracking index | 250 | - | IEC 60112 |
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| Other properties | Value | Unit | Test Standard |
| Density | 1890 | kg/m³ | ISO 1183 |
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| Test specimen production | Value | Unit | Test Standard |
| Injection Molding, injection temperature | 125 | °C | ISO 10724 |
| Injection Molding, injection velocity | 170 | mm/s | ISO 10724 |
| Injection Molding, hold pressure | 100 | MPa | ISO 10724 |
| Injection Molding, cure time | 25 | min | ISO 10724 |
| Compression Molding, mold temperature | 160 | °C | ISO 295 |
| Compression Molding, cure time | 1 | min | ISO 295 |
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Characteristics
Processing
Injection Molding, Transfer Molding
Regional Availability
North America, Europe, Asia Pacific, South and Central America, Near East/Africa
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Other text information
Injection molding
PROCESSING
| Temperature of material: | 90-100 | °C |
| Mould temperature: | 170-190 | °C |
| Curing time: | 15-25 | sec |
|
| Further Information: |
| Barrel temperature |
| - Feed zone: | 60-75 | °C |
| - Nozzle zone: | 70-100 | °C |
| Cavity moulding pressure: | >10 | MPa |
| Back pressure: | 0.5-2 | MPa |
| Holding-pressure: | 60% of injection pressure |
Compression molding
PROCESSING
| Mould temperature: | 160-190 | °C |
| Curing time: | 30-60 | sec |
| Cavity moulding pressure: | >10 | MPa |
