eFunda Polymers: Properties of Polyester (thermoset) {EMI shielding (conductive), BMC}
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Polyester (thermoset)
 
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Application: EMI shielding (conductive), BMC
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Flexural Modulus (MPa)   9660 - 10350   23 ºC   D790
Tensile Strength (MPa)   28 - 31 at break   D638
Compressive Strength (MPa)
at yield or break
 124     D695
Flexural Strength (MPa)
at yield or break
  83     D790
Hardness   50  Barcol   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted
  2.7 - 3.7     D256A

 Thermal Properties Conditions
Pressure State ASTM
Deflection Temperature (ºC)  204   1.82 MPa  lower limit D648

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.8 - 1.85   D792
Water Absorption (% weight increase)  0.5  saturated D570

 Processing Properties Conditions
Type ASTM
Melting Temperature (ºC)  thermoset  Tm, crystalline  
Processing Temperature (ºC)  154 - 193  compression molding  
 138 - 160  transfer molding  
 149 - 188  injection molding  
Linear Mold Shrinkage (cm/cm)  0.0005 - 0.004   D955

Suppliers
Jet Moulding Compounds, Ltd. Ajax, Ontario, Canada L1S 1R8   
Premix, Inc. North Kingsville, OH   
Rostone Lafayette, IN   
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