eFunda Polymers: Properties of Polyester (thermoset) {glass fiber reinforced, SMC low pressure}
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Polyester (thermoset)		  
List of Suppliers
Additives: glass fiber reinforced
Application: SMC low pressure
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   9660 - 17250  tensile   D638
Flexural Modulus (MPa)   6900 - 15180   23 ºC   D790
Tensile Strength (MPa)   49 - 173 at break   D638
Compressive Strength (MPa)
at yield or break		  104 - 207     D695
Flexural Strength (MPa)
at yield or break		   69 - 249     D790
Elongation at break (%)   3     D638
Hardness   40 - 70  Barcol   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted		   3.7 - 12.7     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   6 - 30     D696
Deflection Temperature (ºC)  191 - 260   1.82 MPa   D648

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.65 - 2.3   D792
Water Absorption (% weight increase)  0.1 - 0.25  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted		   380 - 500   D149

 Processing Properties Conditions
Type ASTM
Melting Temperature (ºC)  thermoset  Tm, crystalline  
Processing Temperature (ºC)  133 - 166  compression molding  
Molding Pressure (MPa)   2 - 6    
Compression Ratio  1    
Linear Mold Shrinkage (cm/cm)  0.0002 - 0.001   D955

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Suppliers
Interplastic Corp. St Paul, MN  800-736-5497
Jet Moulding Compounds, Ltd. Ajax, Ontario, Canada L1S 1R8   
Rostone Lafayette, IN   

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