eFunda Polymers: Properties of Polyester (thermoset) {50% glass fiber reinforced, high strength SMC}
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Polyester (thermoset)		  
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Additives: 50% glass fiber reinforced
Application: high strength SMC
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   8280 - 11040  tensile   D638
Flexural Modulus (MPa)   6210 - 9660   23 ºC   D790
Tensile Strength (MPa)  187 - 207 at yield   D638
Flexural Strength (MPa)
at yield or break		  311 - 345     D790
Elongation at break (%)   3 - 5     D638
Hardness   50 - 60  Barcol   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted		   11.7 - 14.8     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   6 - 30     D696
Deflection Temperature (ºC)  219   1.82 MPa  lower limit D648

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.77 - 1.83   D792
Water Absorption (% weight increase)  0.19 - 0.25  after 24 hrs D570

 Processing Properties Conditions
Type ASTM
Melting Temperature (ºC)  thermoset  Tm, crystalline  
Processing Temperature (ºC)  133 - 166  compression molding  
Molding Pressure (MPa)   4 - 14    
Compression Ratio  1    
Linear Mold Shrinkage (cm/cm)  0.002 - 0.003   D955

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Suppliers
Jet Moulding Compounds, Ltd. Ajax, Ontario, Canada L1S 1R8   

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