Texte AlternatifCompared to cold-sealing, the packaging of products in flowpacks with heat-sealing technology offers various advantages. The heat-sealing film is inexpensive, can be stored for a long time and leaves no adhesive residue when the packaging is opened. To ensure a high-quality seal, three factors - temperature, pressure and time - must remain constant during the sealing process. Additionally, not every product can withstand the heat. And until now, this has limited flexibility in the packaging process. Schubert developed the Flowmodul’s two sealing units specifically to achieve this. First, the flowpack’s longitudinal sealing unit is equipped with ultrasonic technology. The heat is generated directly in the heat-sealing film and is not distributed as usual onto the tools and machine parts. Therefore, heat-sensitive products such as chocolate also remain flawless during longitudinal sealing. Furthermore, ultrasonic technology ensures consistent seal quality at different speeds.

Texte AlternatifSecondly, instead of a conventional fixed cross-sealing unit, the new heat-sealing robot is used in the flow-wrapping unit. “The use of constant sealing times at variable chain speeds is the key to our newly developed flying cross-sealing unit. And with it, we are opening up new dimensions in the control range of the heat-sealing film” explains Schubert. By switching from cold- to hot-sealing technology, it is possible to save up to 17 per cent in film material costs. Many different products including biscuits, chocolate, marzipan, pancakes and French toast, as well as BFS products from the pharmaceutical sector, are already being packed with the combination of a flying cross-sealing unit and an ultrasonic longitudinal sealing unit from Schubert.

Part of 637 issue - April 19. All rights reserved except agreement written by Emballage Digest or mention of the magazine