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STRETCH & SHRINK FILM | MATERIALS


transport. They are usually cut to larger dimensions than the product to be packaged, and then shrink to contain them after heating and cooling. RKW says that it tried to turn this traditional process upside down.


“Our goal was to develop a sustainable shrink


film that is smaller than the pallet dimensions – but can be stretched and pulled over the palletised goods,” said Dimitri Rudsinski, head of sales for industrial packaging at RKW Nordhorn. The film shrinks up to 75% faster than conven- tional films, says RKW, which reduces energy consumption and costs. More efficient shrinking processes also shorten cycle times and maximise output, it added – saying that the film is ideal for odd-shaped products that are difficult to package using shrink film.


Tolerance boost Innovia has switched to a new automatic die from Nordson EDI, for making shrink films, which has helped it to improve tolerances and reduce start-up times. Innovia makes transparent film that is then printed on the inside surface, placed over a


container, and made to conform to its surface by means of heat shrinking. On one of its cast film lines – which processes a polystyrene blend into monoaxially-oriented film – it had been producing out-of-tolerance products. The new die is an EDI Autoflex VI-RE H40 unit.


Like the die it replaced, the Autoflex die is an automatic one, using data from a computerised


Left: RKW says its stretchable shrink film reduces both energy


consumption and material requirements


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