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Elmet Technologies

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Sumitomo Bakelite E 2748A Epoxy Molding Compound
Categories: Polymer; Thermoset; Epoxy; Epoxy Molding Compound

Material Notes: E 2748A is a glass reinforced epoxy molding compound, with good impact strength combined with soft flow for the encapsulation of devices requiring high quality and thermal shock resistance.

Information provided by Sumitomo Bakelite High Performance Plastics (sbhpp)

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.76 g/ccASTM D792
Apparent Bulk Density 0.700 g/ccPowder; ASTM D1895
Water Absorption 0.20 %
@Time 173000 sec
ASTM D570
Linear Mold Shrinkage 0.0040 - 0.0060 cm/cmASTM D955
 
Mechanical PropertiesOriginal ValueComments
Tensile Strength 76.0 MPaASTM D638
Flexural Strength 142 MPaASTM D790
Flexural Modulus 12.4 GPaASTM D790
Compressive Strength 210 MPaASTM D695
Izod Impact, Notched 31.0 J/mASTM D256A
 
Electrical PropertiesOriginal ValueComments
Dielectric Constant 4.5
@Frequency 1e+6 Hz
wet; ASTM D150
Dielectric Strength >= 14.2 kV/mm
@Frequency 60 Hz
ST, dry
Dissipation Factor 0.010
@Frequency 1e+6 Hz
wet; ASTM D150
Arc Resistance 180 secASTM D495
 
Thermal PropertiesOriginal ValueComments
CTE, linear, Parallel to Flow 17.0 µm/m-°CASTM E831

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PSUMIT128 / 193933

Ensinger PEI

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