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Optimal protection Every year, our package material plants produce millions of pre-formed carton sleeves, which are later aseptically filled by customers on their premises. The package material is constructed of three components: unprocessed cardboard, polyethylene and aluminium. The 0.4 millimetre-thick cardboard is composed of 75 per cent pulp. 28 grams of packaging is sufficient for one litre of liquid – that’s less than three per cent of the total weight of the product on the shelf. To prevent the cardboard from leaking, the interior and exterior are coated with a layer of high-grade polyethylene. At 0.05 millimetres, this layer is much thinner than kitchen film. Carton packs for long-life foods also have a wafer-thin aluminium layer and a further layer of polyethylene. The first offers complete protection from light and oxygen, while the second is applied over the aluminium layer and bonds it to the cardboard. This prevents the aluminium coming into contact with the food material in the carton. |
