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Ensinger PEI

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A. Schulman BMC 1401 Encapsulating Material, Electrical Grade
Categories: Polymer; Thermoset; Polyester, TS

Material Notes: BMC 1401 is an electrical grade of encapsulating material characterized by a balance of soft flow and cure rate to ensure complete and proper encapsulation without voiding. Generally too soft for compression molding but excellent in transfer or injection processes. Directly competitive against epoxy encapsulants on cost and cycle times. Very stable shelf life. UL® recognized. This material was formerly known as Glastic® 1401.

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.73 - 1.79 g/cc
Water Absorption 0.20 - 0.30 %24 hours, 23°C
Linear Mold Shrinkage 0.0010 - 0.0030 cm/cm
 
Mechanical PropertiesOriginal ValueComments
Hardness, Barcol 40 - 50
Tensile Strength, Ultimate 35000 - 45000 psi
Flexural Strength 11000 - 13000 psi
Flexural Modulus 1700 - 1900 ksi
Compressive Strength 15000 - 17000 psi
Izod Impact, Notched 1.00 - 2.00 ft-lb/in
 
Electrical PropertiesOriginal ValueComments
Dielectric Strength 290 V/milShort Time
Dissipation Factor 0.015
@Frequency 60 Hz
Arc Resistance 190 sec
 
Thermal PropertiesOriginal ValueComments
Deflection Temperature at 1.8 MPa (264 psi) >= 500 °F
Flammability, UL94 V-0
 
Processing PropertiesOriginal ValueComments
Mold Temperature 280 - 330 °F

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