BASF joined forces with Alpla to create a bottle for milk and yoghurt beverages using impact-resistant polystyrene (PS-I). This demonstrates that polystyrene is an inexpensive alternative when it comes to packaging for this sector.
BASF’s polystyrene type BX 3580 — specially optimised for this application — can be processed by injection blow moulding and injection stretch blow moulding on the same machines used for PET. The advantage for packaging manufacturers is that the lower density of polystyrene in comparison to PET can reduce material costs by up to 25%. Even more energy and money are saved because injection stretch blow moulding uses less compressed air and, unlike PET, the polystyrene does not have to be pre-dried.
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