| Polyhydroxybutyrates (PHB) |
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The biopolymer poly-3-hydroxybutyrate (PHB) is a polyester produced from renewable raw materials. Its characteristics are similar to those of the petrochemical-produced plastic polypropylene. The production of PHB is currently booming. Companies worldwide are aiming to either begin production of PHB or to expand their current production capacity, which would most likely result in a price reduction to fewer than 5 Euros per kilogram. The South American sugar industry, for example, has decided to expand PHB production to an industrial scale. PHB is distinguished primarily by its physical characteristics. It produces transparent film at a melting point higher than 130 degrees Celsius, and is biodegradable without residue. Combined with other substances, PHB is also offered as a PHB blend. The application of PHB blends ranges from the production of glues to hard rubber. Characteristics that are specifically required in the blends can be developed by adding cellulose acetates. Because cellulose acetate already exists as a waste product of cigarette filter production, its use in PHB blends can lower the production price. Cork, starch or inorganic substances could also be added in order to meet special requirements of end products.
(Sources: Elisabeth Wallner (2002): Herstellung von Polyhydroxyalkanoaten
auf der Basis alternativer Rohstoffquellen, Dissertation; Bio-Pro GmbH; FNR; European Bioplastics; Biomer) Bookmark this page!      |
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