| About |
|---|
| BMC 2270 molding compound is a mineral filled, glass-fiber-reinforced polyester compound suitable for compression and transfer molding. It is a general purpose material with medium impact strength and wet insulation resistance. Typical applications include distributor caps and rotors. BMC 2270 molding compound is produced in extruded form in a range on industrial colors. It is available in logs up to 12 inches in length or as precut slugs, of specific weight, in diameters from 1″ to 2 ½”. Within this range, smaller diameters are supplied as multiple extrusions and weight tolerances are plus or minus 5% up to a maximum of plus or minus 15 grams.&& |
| Product Description | |
|---|---|
| Generic | 热固性聚酯 |
| Material Status | Commercial: Active |
| Features | V-0 |
| Availabilitys | North America |
| Technical Data | |||
|---|---|---|---|
| PHYSICAL | Nominal value | Unit | Test method |
| Density | 1.86 | g/cm³ | ASTM D792 |
| Shrinkage rate | |||
| MD: Compression molding | 0.25 to 0.35 | % | ASTM D955 |
| Water absorption rate | |||
| 23℃，24hr | 0.12 | % | ASTM D570 |
| IMPACT | Nominal value | Unit | Test method |
|---|---|---|---|
| Impact strength of cantilever beam notch | |||
| Compression Molding | 190 | J/m | ASTM D256 |
| THERMAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Hot deformation temperature | |||
| 1.8 MPa, unannealed, molded | 260 | ℃ | ASTM D648 |
| Electrical performance | Nominal value | Unit | Test method |
|---|---|---|---|
| Dielectric strength | 15 | kV/mm | ASTM D149 |
| Dielectric constant | |||
| 60 Hz | 5.30 | ASTM D150 | |
| Dissipation factor | |||
| 60 Hz | 0.018 | ASTM D150 | |
| Arc resistance | 190 | sec | ASTM D495 |
| Compared to the leakage tracing index | 500 | V | UL 746 |
| FLAME CHARACTERISTICS | Nominal value | Unit | Test method |
|---|---|---|---|
| Flame retardant level | UL 94 | ||
| 1.60 mm | V-0 | UL 94 | |
| 3.20 mm | V-0 | UL 94 | |
| 6.40 mm | V-0 | UL 94 |
| MECHANICAL | Nominal value | Unit | Test method |
|---|---|---|---|
| tensile strength | |||
| Yield, molding | 41.4 | MPa | ASTM D638 |
| bending strength | |||
| Compression Molding | 121 | MPa | ASTM D790 |
| compressive strength | 162 | MPa | ASTM D695 |
| Babbitt hardness | 30 | ASTM D2583 |
| Process Conditions | |||
|---|---|---|---|
| injection | Nominal value | Unit | Test method |
| Mold temperature | 138 to 166 | °C | |
| Notes |
|---|
| 1. Typical properties: these are not to be construed as specifications. |
| 2. Method A (Short-Time) |
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