PET is a thermoplastic polymer of the polyester family mainly used in synthetic fibers, beverage & food container applications. It is one of the hardest engineering thermoplastics to mould successfully and consequently has found limited use in injection moulding outside of the global use in packaging.
Durapet compounds exist both as an amorphous and as a semi-crystalline thermoplastic material depending on it’s thermal history. Generally, it has good resistance to mineral oils, solvents and acids but not to strong bases.
The semi-crystalline PET has good strength, ductility, stiffness and hardness. The amorphous Durapet has better ductility but less stiffness and hardness.