eFunda Polymers: Properties of Polyester (thermoplastic) {poly(butylene-terephthalate), 35% glass fiber reinforced, flame-retardant grade}
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Polyester (thermoplastic)
 
List of Suppliers
State: poly(butylene-terephthalate)
Additives: 35% glass fiber reinforced
Application: flame-retardant grade
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)  10281 - 11730  tensile   D638
Flexural Modulus (MPa)   8970 - 10350   23 ºC   D790
Tensile Strength (MPa)  120 - 138 at break   D638
Compressive Strength (MPa)
at yield or break
 124     D695
Flexural Strength (MPa)
at yield or break
 207     D790
Elongation at break (%)   2 - 3     D638
Hardness   88 - 90  Rockwell M   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted
  0.7 - 0.8     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   2     D696
Deflection Temperature (ºC)  218 - 254   0.46 MPa   D648
 204 - 232   1.82 MPa   D648

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.63   D792
Water Absorption (% weight increase)  0.06 - 0.07  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted
  490   D149

 Processing Properties Conditions
Type ASTM
Melting Temperature (ºC)  220 - 260  Tm, crystalline  
Processing Temperature (ºC)  254 - 293  injection molding  
Linear Mold Shrinkage (cm/cm)  0.002 - 0.006   D955

Suppliers
Albis Corp. Rosenburg, TX  800-231-5911
Ashley Polymers Brooklyn, NY   
BASF Corp. Mount Olive, NJ  800-BC-RESIN
ComAlloy International Co. Nashville, TN   
DSM Engineering Plastic Products, Inc. Reading, PA  800-729-0101
DuPont Co., Polymers Wilmington, DE  800-438-7225
Ferro Corp. Cleveland, OH   
LNP Engineering Plastics, Inc. Exton, PA  800-854-8774
M.A. Hanna Engineered Materials Norcross, GA   
M.A. Industries, Inc. Peachtree City, GA  800-241-8250
Polymer Resources, Ltd. Farmington, CT  800-243-5176
RTP Co. Winona, MN  800-433-4787
Ticona Summit, NJ  800-526-4960
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