{"id":9707,"date":"2025-10-09T09:08:26","date_gmt":"2025-10-09T13:08:26","guid":{"rendered":"https:\/\/www.packagingindustrynews.com\/?p=9707"},"modified":"2025-10-09T09:08:26","modified_gmt":"2025-10-09T13:08:26","slug":"constantia-flexibles-and-watttron-develop-new-lid-sealing-system","status":"publish","type":"post","link":"https:\/\/www.packagingindustrynews.com\/?p=9707","title":{"rendered":"Constantia Flexibles and watttron develop new lid sealing system\u00a0"},"content":{"rendered":"


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The new system uses watttron\u2019s ring-heating technology. Credit: Kleber Cordeiro \/ Shutterstock.com <\/figcaption><\/figure>\n<\/p><\/div>\n

Austria-based flexible packaging manufacturer Constantia Flexibles, in collaboration with German thermal technology company watttron, has developed a new lid sealing system.\u00a0<\/p>\n

The new system is\u00a0capable of handling polypropylene (PP) and aluminium lids on PP cups within a single production line.\u00a0\u00a0<\/p>\n

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The system builds on Constantia Flexibles\u2019 PPCover, a mono-material PP lidding solution designed to meet recyclability standards.\u00a0<\/p>\n

Traditional sealing machines typically heat the entire sealing head, which can cause issues such as material curling.\u00a0\u00a0<\/p>\n

The new system uses watttron\u2019s ring-heating technology, applying heat only to the outer sealing ring in a targeted approach which reduces thermal stress and improves energy efficiency.<\/p>\n

The system heats and cools at between 10\u00b0C and 20\u00b0C per second and maintains the set temperature within \u00b11\u00b0C.\u00a0\u00a0<\/p>\n

Lab-scale trials with PPCover showed consistent sealing performance for both PP and aluminium lids, demonstrating strong peel strength and internal pressure resistance.\u00a0\u00a0<\/p>\n

watttron CEO Marcus Stein noted: \u201cWe developed our ring-heating technology to deliver precise energy exactly where it\u2019s needed \u2014 no more, no less.\u00a0\u00a0<\/p>\n

\u201cThat precision not only improves quality and flexibility, but also contributes meaningfully to energy efficiency in packaging lines.\u201d\u00a0<\/p>\n

Constantia Flexibles stated that the system provides operational advantages by eliminating the need for separate machines for different lid types, simplifying production processes and reducing equipment complexity.\u00a0\u00a0<\/p>\n

It also features 100% inspection capability to detect and remove defective cups in real time.\u00a0\u00a0<\/p>\n

Constantia Flexibles market product manager for die cut lids Claus Dworschak stated: \u201cThis is a strong one-fits-all solution in dairy lidding.\u00a0\u00a0<\/p>\n

\u201cIt simplifies operations and enhances quality \u2014 exactly what our customers need.\u201d\u00a0<\/p>\n

Constantia Flexibles employs 8,780 people across 37 sites in 18 countries.\u00a0\u00a0<\/p>\n

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