| What are the key functions in an aseptic line? |
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Answer: During Ultra Heat Treatment (UHT), the product is heated at a high temperature for a few seconds and rapidly cooled. The benefit offered by UHT sterilisation is that the flavour and texture of the product are hardly impaired thanks to the rapid heating and cooling. Typical examples of products suitable for this method of treatment and packaging are milk, coffee cream, yoghurt drinks, vitamin- and mineral-enriched milk, as well as fruit juices. The product is UHT-sterilised in a Stork Sterideal system Bottles can be supplied by a bottle supplier or manufactured on-site with a Stork Blow-moulding equipment. In-house blow moulding offers the advantage of producing proprietary bottles with a shape that precisely matches the product and the market. If required, the blow-moulding machine can be set up to use sterile air for producing closed-type bottles, which do not need to be internally sterilised before filling. The bottles are filled under aseptic conditions in the Stork Asep-Tec aseptic filler. If open bottles are used their interior and neck are sterilised with hydrogen peroxide and dried with sterile air. If aseptically blown closed bottles are used, their necks are sterilized and trimmed under sterile conditions. The bottles are then filled in one or more steps, depending on the product and bottle volume. They can be closed with aluminium seals or screw caps which are also sterilised with hydrogen peroxide. When handling particularly sensitive products, the air in the bottles can be displaced by nitrogen. |
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