13. June 2019 | Recycling | Innovation

Spouted pouches made from one material

Mono-material spouted pouches
The new sealing technology is said to enable the production of spouted pouches made of mono-material films
Source: Dow

Dow and Menshen, manufacturer of caps, closures and single-serve capsules, introduced the new transformative Reverse Spout Sealing Technology. This technology is said to enable the production of spouted pouches made of mono-material films allowing converters to address the recycling criteria for flexible packaging.

Reversing the process

“We basically reversed the idea of where and when the heat needs to be applied during the spout sealing process”, explained Dr. Peter Sandkuehler, Global Application Technology Leader at Dow’s Packaging & Specialty Plastics business. “By transferring the heat from the pre-melted spout base directly to the sealant layer of the film, we’ve solved two challenges at the same time: how to easily seal spouts to mono-material films, and how to prevent the hard spout ribs from cutting into the film.”

The new process is said to be designed to easily seal spouts in more heat sensitive, mono-material structures made from all polypropylene or all polyethylene packaging layers. Rather than traditionally applying the heat from outside the pouch forming film to melt the seal layer and the spout, the latter is pre-melted at its base before insertion into the pouch and sealing.

More heat sensitive

Reversing the traditional sealing process reportedly helps reduce the excess heat needed to be applied from the outside of the film to seal the inner, lower density film layers to a high-density spout base. At the same time, the packaging structure is said to be less dependent on a film’s thermal resistance and film cut-in is avoided, resulting in good quality spout sealing.

The technology is suitable for most pouch sizes and for a wide range of applications – from baby food, condiments, and detergents, to personal care applications such as shampoos, shower gels, or body lotions. Barrier solutions are available, too.

K; 16 to 23 Octover 2019; Düsseldorf, Germany: Hall 8a, K48-1 – K48-4

edited by Christiane Lingrön

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