Polyhydroxybutyrate (PHB) is a polyhydroxyalkanoate (PHA) that is produced via fermentation of renewable raw materials. It is a thermoplastic polyester with properties very similar to those of petroleum-based polypropylene (PP).
VINNEX® enhances the physical properties of PHB, making it much easier to process the material. Depending on the VINNEX® content and grade, it is possible, for instance, to optimize crystallization or lower the melting point. Furthermore, adding VINNEX® resins to PHB can simultaneously increase its elongation at break and its tensile strength.
A property profile thus enhanced, combined with the high heat resistance of PHB, makes it possible to use the material in applications such as hot filling.