| About |
|---|
| BMC 1901 molding compound is a mineral filled, glass-fiber-reinforced alkyd compound suitable for compression transfer molding. It is a general purpose with medium impact strength and good overall electrical properties. Typical applications include switch components, relay bases, stack insulator s and as a formable insulating putty for motor construction and repair. BMC 1901 molding compound is produced in extruded form in a range of industrial colors. It is available in logs up to 12 inches in length or as precut slugs, of specific weigh, in diameters from 3/4″ to 2 7/8″. 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. This product is also available in the form of continuous, Round rope in diameters ranging from ¾” to 1 ¼”. Diameters of ½” and 5/8″, as well as selected flat rope shapes, are supplied at an additional charge.&& |
| Product Description | |
|---|---|
| Generic | 醇酸树脂 |
| Material Status | Commercial: Active |
| Features | Good Electrical Properties,HB |
| Availabilitys | North America |
| Technical Data | |||
|---|---|---|---|
| PHYSICAL | Nominal value | Unit | Test method |
| Density | 2.20 | g/cm³ | ASTM D792 |
| Shrinkage rate | |||
| MD | 0.30 to 0.60 | % | ASTM D955 |
| Water absorption rate | |||
| 23℃，24hr | 0.28 | % | ASTM D570 |
| IMPACT | Nominal value | Unit | Test method |
|---|---|---|---|
| Impact strength of cantilever beam notch | 160 | J/m | ASTM D256 |
| THERMAL | Nominal value | Unit | Test method |
|---|---|---|---|
| Hot deformation temperature | |||
| 1.8 MPa, unannealed | 260 | ℃ | ASTM D648 |
| Electrical performance | Nominal value | Unit | Test method |
|---|---|---|---|
| Dielectric strength | 13 | kV/mm | ASTM D149 |
| Dielectric constant | |||
| 60 Hz | 7.30 | ASTM D150 | |
| Dissipation factor | |||
| 60 Hz | 0.040 | ASTM D150 | |
| Arc resistance | 180 | sec | ASTM D495 |
| Compared to the leakage tracing index | 600 | V | UL 746 |
| FLAME CHARACTERISTICS | Nominal value | Unit | Test method |
|---|---|---|---|
| Flame retardant level | UL 94 | ||
| 1.60 mm | HB | UL 94 | |
| 3.20 mm | HB | UL 94 | |
| 6.40 mm | HB | UL 94 |
| MECHANICAL | Nominal value | Unit | Test method |
|---|---|---|---|
| bending strength | 121 | MPa | ASTM D790 |
| compressive strength | 165 | MPa | ASTM D695 |
| Babbitt hardness | 70 | 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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