Material Comparison
Product Info
Product Name
Brand Name
Usages
Properties
Certificates
Epoxy Cosmic Epoxy E4920D Cosmic Plastics, Inc.
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Plastic Datasheets
| Impact resistance | Test Condition | Test Method | Cosmic Plastics, Inc./Cosmic Epoxy E4920D |
|---|---|---|---|
| Impact strength of cantilever beam gap | 27 J/m |
| hardness | Test Condition | Test Method | Cosmic Plastics, Inc./Cosmic Epoxy E4920D |
|---|---|---|---|
| Barcol Hardness | 65 |
| Electrical performance | Test Condition | Test Method | Cosmic Plastics, Inc./Cosmic Epoxy E4920D |
|---|---|---|---|
| Dissipation Factor | DielectricBreakdown-Wet | 56000 V | |
| dielectric constant | 1kHz | 3.90 | |
| Surface Resistivity | 1E+15 ohms | ||
| dielectric constant | 1MHz | 4.30 | |
| Dissipation Factor | 1kHz | 0.012 | |
| 耐电弧性 | 180 sec | ||
| 1MHz | 0.011 | ||
| dielectric strength | Wet | 14 kV/mm | |
| Volume resistivity | 1E+15 ohms·cm |
| Mechanical properties | Test Condition | Test Method | Cosmic Plastics, Inc./Cosmic Epoxy E4920D |
|---|---|---|---|
| tensile strength | 82.7 MPa | ||
| bending strength | 103 MPa | ||
| Flexural modulus | 13800 MPa | ||
| compressive strength | 241 MPa |
| flammability | Test Condition | Test Method | Cosmic Plastics, Inc./Cosmic Epoxy E4920D |
|---|---|---|---|
| UL flame retardant rating | 1.6mm | UL 94 | V-0 |
| physical property | Test Condition | Test Method | Cosmic Plastics, Inc./Cosmic Epoxy E4920D |
|---|---|---|---|
| Water absorption rate | 平衡,50°C | 0.25 % | |
| density | 1.85 g/cm³ | ||
| Shrinkage rate | MD | 0.20to0.40 % | |
| 2.0to5.0 |
| Thermal performance | Test Condition | Test Method | Cosmic Plastics, Inc./Cosmic Epoxy E4920D |
|---|---|---|---|
| Glass Transition Temperature | 175 °C | ||
| Linear coefficient of thermal expansion | MD：HeatDistortion | 260 °C | |
| MD：--3 | 2.5E-05 cm/cm/°C | ||
| MD：--4 | 7E-05 cm/cm/°C | ||
| MD：导热系数 | 0.67 W/m/K |
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