Tensile strength reaches approximately 58 MPa, flexural modulus sits around 2,300 MPa, and notched Izod impact strength exceeds 5 kJ/m² at 23 °C—respectable numbers for an unfilled resin. The material retains useful impact resistance down to –40 °C and shows good surface hardness together with solid abrasion resistance in light sliding applications.
Mechanical Property Overview
Typical values for non-reinforced general-purpose PBT grade.
| Property | Typical Value | Unit |
|---|---|---|
| Tensile Strength | ~58 | MPa |
| Flexural Modulus | ~2,300 | MPa |
| Notched Izod Impact (23°C) | > 5.0 | kJ/m² |
| Low-Temp Impact | Retains usefulness | Down to –40 °C |
The Benchmark of PBT: A Comprehensive Guide to Duranex 2002
Explore our ultimate grade resource to master tool designs, injection profiling, and chemical tolerances of Duranex 2002.
Molding Behavior & Dimensional Stability
Melt flow rate falls in the 18–25 g/10 min range (250 °C / 2.16 kg), giving smooth flow into thin walls and complex cores without excessive flash or short shots. Mold shrinkage stays between 1.6% and 2.0% and remains highly isotropic. Water absorption after 24 h immersion at 23 °C measures below 0.08%, so molded parts resist swelling, warping, or loss of tolerances in humid conditions or after secondary operations.
Excellent Flow Rate
18–25 g/10 min (250 °C / 2.16 kg)
Easily molds into ultra-thin walls and intricate cores without creating flashing.
Isotropic Shrinkage
1.6% – 2.0%
Uniform dimensions across standard axes ensure highly reproducible assemblies.
Minimal Water Intake
< 0.08% after 24h at 23 °C
Prevents structural swelling, warping, and keeps tolerance precise in high humidity.
Core Material Traits
Explore the primary advantages making Duranex 2002 a gold-standard engineering resin.
Electrical Integrity
Dielectric strength exceeds 20 kV/mm, volume resistivity tops 10¹⁶ Ω·cm, and CTI typically reaches 600 V (PLC 0). These values support reliable long-term insulation in connectors, bobbins, and switchgear exposed to heat and contamination.
Robust Chemical Resistance
Duranex 2002 withstands prolonged contact with gasoline, diesel, engine oils, transmission fluids, brake fluids, greases, and most aliphatic hydrocarbons. Aromatic solvents and strong acids will attack the resin, but everyday automotive and industrial fluids cause only minor property loss.
Intrinsic Flame Safety
Standard specimens 1.6 mm and 3.2 mm thick earn UL94 HB classification. The resin burns slowly once ignited yet self-extinguishes when the flame source is removed. Applications needing V-0 or higher ratings require one of the flame-retardant grades in the Duranex lineup.
Aroma Retention
PBT inherently retains fragrances longer than most thermoplastics. Manufacturers of cosmetic caps, air-freshener bodies, and scented household items often choose Duranex 2002 specifically for this aroma-retaining behavior.
Application Spotlight
Duranex 2002's balanced properties make it a preferred choice across demanding industries, especially where fluid resistance and dimensional stability are key.
Under-Hood Components
Provides chemical endurance against aggressive under-hood automotive fluids, greases, and oils.
Connectors & Bobbins
Exceptional dielectric isolation keeps high-density electronics and switchgears fully insulated.
Appliance Housings
Combines physical surface hardness, wear resistance, and high aroma retention for everyday comfort products.
Duranex 2002 delivers a straightforward, dependable property set: strong enough for structural duties, fluid-resistant for automotive environments, electrically safe, and dimensionally stable across humidity swings. It remains a benchmark general-purpose PBT after decades on the market.
