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Cosmic Epoxy E4940S
| Category: | Epoxy , Epoxy; Epoxide |
| Manufacturer: | Cosmic Plastics, Inc. |
| Trademark: | Cosmic Epoxy |
| Fillers: | - |
| Ports: | Qinzhou, Shekou, Shanghai, Ningbo |
| Delivery Terms | FOB, CIF, DAP, DAT, DDP |
| PDF: | TD2RWX_Cosmic-Epoxy-E4940S.pdf  |
| PRICE: | Order Products email sales@su-jiao.com |
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DESCRIPTION Cosmic E4940S is a mineral filled epoxy molding compound which is supplied in a granular form. FEATURES It has excellent dimensional stability, improved thermal cycling and exceptional moisture resistance. Standard spiral flow range is 25-35" (EMMI) at 150°C and 1000 psi. It has a hot plate gel time of 22-30 seconds at 160°C, and 18-26 seconds at 182°C. It has a shelf life of eight months when stored at 5°C. APPLICATIONS It is designed for use in high-volume encapsulation of resistor networks and fiber-optic connectors requiring high quality, reliability and good moldability. |
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| Physical | Nominal Value | Unit | |
|---|---|---|---|
| Specific Gravity | 1.85 | g/cm³ | |
| Bulk Factor | 2.0 to 5.0 | ||
| Molding Shrinkage - Flow | 0.20 to 0.40 | % | |
| Water Absorption 1(Equilibrium, 50°C) | 0.25 | % |
| Hardness | Nominal Value | Unit | |
|---|---|---|---|
| Barcol Hardness | 65 |
| Mechanical | Nominal Value | Unit | |
|---|---|---|---|
| Tensile Strength | 82.7 | MPa | |
| Flexural Modulus | 13800 | MPa | |
| Flexural Strength | 103 | MPa | |
| Compressive Strength | 193 | MPa |
| Impact | Nominal Value | Unit | |
|---|---|---|---|
| Notched Izod Impact | 27 | J/m |
| Thermal | Nominal Value | Unit | |
|---|---|---|---|
| Glass Transition Temperature | 175 | °C | |
| CLTE - Flow | |||
| -- 2 | 2.0E-5 | cm/cm/°C | |
| -- 3 | 7.0E-5 | cm/cm/°C | |
| Thermal Conductivity | 0.67 | W/m/K | |
| Heat Distortion | 260 | °C |
| Electrical | Nominal Value | Unit | Test Method |
|---|---|---|---|
| Dielectric Breakdown - Wet | 56000 | V | |
| Surface Resistivity | 1.0E+15 | ohms | |
| Volume Resistivity | 1.0E+15 | ohms·cm | |
| Dielectric Strength 4(Wet) | 14 | kV/mm | |
| Dielectric Constant 5 | |||
| 1 kHz | 3.90 | ||
| 1 MHz | 4.30 | ||
| Dissipation Factor 6 | |||
| 1 kHz | 0.012 | ||
| 1 MHz | 0.011 | ||
| Arc Resistance | 180 | sec |
| Flammability | Nominal Value | Unit | Test Method |
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| Flame Rating (3.18 mm) | V-0 | UL 94 |
| Injection | Nominal Value | Unit | |
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| Processing (Melt) Temp | 150 to 180 | °C | |
| Injection Pressure | 3.45 to 55.2 | MPa |
| Note Message | |
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| 1 . | 48 hrs |
| 2 . | Alpha 1 |
| 3 . | Alpha 2 |
| 4 . | Method B (Step-by-Step) |
| 5 . | Wet |
| 6 . | Wet |
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