Epoxy Cosmic Epoxy E4940P Cosmic Plastics, Inc.

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Datasheet

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Technical Data Sheet

impact performance	Test Condition	Test Method	Test Result	Test Unit
Impact strength of cantilever beam gap			27	J/m
mechanical properties	Test Condition	Test Method	Test Result	Test Unit
compressive strength			193	MPa
bending strength			103	MPa
Bending modulus			13800	MPa
tensile strength			82.7	MPa
thermal performance	Test Condition	Test Method	Test Result	Test Unit
Linear coefficient of thermal expansion	MD：--4		7E-05	cm/cm/°C
Linear coefficient of thermal expansion	Linear coefficient of thermal expansion	MD：--3		2.5E-05	cm/cm/°C
Glass transition temperature			175	°C
Linear coefficient of thermal expansion	MD：HeatDistortion		260	°C
Linear coefficient of thermal expansion	Linear coefficient of thermal expansion	MD：导热系数		0.67	W/m/K
Physical properties	Test Condition	Test Method	Test Result	Test Unit
Water absorption rate	Equilibrium,50°C		0.25	%
Shrinkage rate	MD		0.20to0.40	%
Shrinkage rate	Shrinkage rate			2.0to5.0
density			1.85	g/cm³
Electrical performance	Test Condition	Test Method	Test Result	Test Unit
Dissipation factor	1MHz		0.011
Dissipation factor	Dissipation factor	1kHz		0.012
Dielectric constant	1MHz		4.30
Dielectric constant	Dielectric constant	1kHz		3.90
Dielectric strength	Wet		14	kV/mm
Volume resistivity			1E+15	ohms·cm
Surface resistivity			1E+15	ohms
Dissipation factor	DielectricBreakdown-Wet		56000	V
Dissipation factor	Dissipation factor	耐电弧性		180	sec
hardness	Test Condition	Test Method	Test Result	Test Unit
Babbitt hardness			65

IMPORTANT NOTES: Plas.com collected the data in the data sheet from the material manufacturers. Plas.com makes the best effort to improve the accuracy of the data, but has no responsibility for the data. We strongly recommend verifying the validity of the data with the material manufacturers before making a final decision.

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