Material Comparison

Product Info
Product Name
Brand Name
Usages
Properties
Certificates
Epoxy Cosmic Epoxy E4930R Cosmic Plastics, Inc.
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Plastic Datasheets

Impact resistanceTest ConditionTest MethodCosmic Plastics, Inc./Cosmic Epoxy E4930R
Impact strength of cantilever beam gap32 J/m
hardnessTest ConditionTest MethodCosmic Plastics, Inc./Cosmic Epoxy E4930R
Barcol Hardness65
Electrical performanceTest ConditionTest MethodCosmic Plastics, Inc./Cosmic Epoxy E4930R
Dissipation FactorDielectricBreakdown-Wet56000 V
Surface Resistivity1E+15 ohms
dielectric constant1kHz4.20
1MHz4.50
Dissipation Factor1kHz0.012
耐电弧性180 sec
1MHz0.011
dielectric strengthWet14 kV/mm
Volume resistivity1E+15 ohms·cm
Mechanical propertiesTest ConditionTest MethodCosmic Plastics, Inc./Cosmic Epoxy E4930R
tensile strength 82.7 MPa
bending strength103 MPa
Flexural modulus13800 MPa
compressive strength193 MPa
flammabilityTest ConditionTest MethodCosmic Plastics, Inc./Cosmic Epoxy E4930R
UL flame retardant rating3.2mmUL 94V-0
physical property Test ConditionTest MethodCosmic Plastics, Inc./Cosmic Epoxy E4930R
Water absorption rate平衡,50°C0.25 %
density1.85 g/cm³
Shrinkage rateMD0.20to0.40 %
2.0to5.0
Thermal performanceTest ConditionTest MethodCosmic Plastics, Inc./Cosmic Epoxy E4930R
Glass Transition Temperature165 °C
Linear coefficient of thermal expansionMD:HeatDistortion260 °C
MD:--32.5E-05 cm/cm/°C
MD:--48E-05 cm/cm/°C
MD:导热系数1.3 W/m/K

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