eFunda Polymers: Properties of Polyester (thermoset) {glass fiber reinforced, BMC, TMC}
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Polyester (thermoset)		  
List of Suppliers
Additives: glass fiber reinforced
Application: BMC, TMC
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)  10350 - 17250  tensile   D638
Flexural Modulus (MPa)  10350 - 12420   23 ºC   D790
Tensile Strength (MPa)   21 - 90 at break   D638
Compressive Strength (MPa)
at yield or break		   97 - 207     D695
Flexural Strength (MPa)
at yield or break		   76 - 228     D790
Elongation at break (%)   1 - 2     D638
Hardness   50 - 65  Barcol   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted		   1.1 - 9.8     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   20     D696
Deflection Temperature (ºC)  160 - 280   1.82 MPa   D648
Thermal Conductivity (W/m-ºC)  0.752 - 0.920     C177

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.72 - 2.1   D792
Water Absorption (% weight increase)  0.1 - 0.45  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted		   300 - 390   D149

 Processing Properties Conditions
Type ASTM
Melting Temperature (ºC)  thermoset  Tm, crystalline  
Processing Temperature (ºC)  138 - 194  compression molding  
 138 - 160  transfer molding  
 138 - 188  injection molding  
Molding Pressure (MPa)   3 - 8    
Compression Ratio  1    
Linear Mold Shrinkage (cm/cm)  0.0003 - 0.007   D955

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Suppliers
BP Chemicals, Inc. Cleveland, OH  800-272-4367
Budd Co. Troy, MI   
Bulk Molding Compounds, Inc. West Chicago, IL   
Cytec Fiberite, Inc. Tempe, AZ   
Epic Resins Palmyra, WI  800-242-6649
Glastic Corp. Cleveland, OH   
Haysite Reinforced Plastics Erie, PA   
Jet Moulding Compounds, Ltd. Ajax, Ontario, Canada L1S 1R8   
Plaslok Corp. Buffalo, NY  800-828-7913
Polyply Composites, Inc. Grand Haven, MI   
Premix, Inc. North Kingsville, OH   
Rostone Lafayette, IN   

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