Hepla® PBT boasts excellent heat resistance, toughness, fatigue resistance, self-lubrication, weatherability, good dimensional stability, and chemical resistance and good electrical properties. It has a low friction coefficient. At room temperatures, it has excellent resistance to various chemicals, including aliphatic hydrocarbons, gasoline, carbon tetrachloride, perchloroethylene, oil, fat, alcohol, glycol, ester, ether and dilute acid, and alkali. In addition, Hepla® PBT has a low water absorption rate of only 0.1%, and can maintain most of physical properties (like electrical properties and electrical insulation) in humid environment. Hepla® PBT can be rapidly crystallized at low temperatures, with good moldability in short molding cycle. Its molding temperature is much lower than that of many other engineered plastics. In general, Hepla® PBT has greater tensile strength, flexural modulus and dielectric strength, as well as faster and more economical molding process than most thermoset materials.

Highlights and Limitations

Highlights: 

1. Excellent drug resistance and oil resistance

2. Self-lubrication with a small friction coefficient

3. Low water absorption

4. Excellent electrical properties

5. Good dimensional stability

Limitations：

1. Impact resistance

2. Relatively poor hydrolysis resistance and liable to be eroded by halogenated hydrocarbon

Hepla® PBT performance comparison of different brands