Dow and Menshen bring Sustainable Design to Spouted Pouches
Reversing the Traditional Sealing Process Brought the Solution
The introduction of the reverse spout sealing technology is the result of a three-year joint development between Dow and Menshen who are working with a number of partners on technology integration and assist brand owners and converters to put the new sealing approach into practice. 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.
Two Challenges Solved in One Step
The new process is 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. “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,” explained Dr. Peter Sandkuehler the advantages of the new method.
The Beauty of Simplicity
Reversing the traditional sealing process 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 less dependent on a film’s thermal resistance and film cut-in is avoided, resulting in good quality spout sealing and a pouch that looks great on the shelf. “The beauty of the process is its simplicity,” stated Sarah De La Mare, Business Development Officer at Menshen. "It is actually more logical to apply the heat from the inside rather than from the outside, whether you use mono-materials or not."
The reverse spout sealing technology was successfully tested at Dow’s Pack Studios in Horgen, Switzerland, with Menshen spouts sealed in mono or laminate film structures containing Dow solutions such as DOWLEXTM 2750ST, ELITETM 5960G in outer layers coated with OPULUXTM HGT and AFFINITYTM sealants. At present the company is working with several machine manufacturers to ensure that this technology can be integrated into new and existing spouted pouch making lines. (bf)
The Dow Chemical Company is an American multinational chemical corporation headquartered in Midland, Mich., USA, and a subsidiary of Dow Inc. The company belongs to the top 3 of the list of largest chemical producers. Its portfolio of performance materials, industrial intermediates and plastics businesses delivers a broad range of differentiated science-based products and solutions for our customers in high-growth segments, such as packaging, infrastructure and consumer care. Dow operates 113 manufacturing sites in 31 countries and employs approximately 37,000 people.
Menshen has been one of the world’s leading manufacturers of closures, plastic lids, and packaging systems for more than 40 years. As an owner-operated company based in the city of Finnentrop in the Sauerland region with approximately 1,300 employees at 14 locations across 11 countries Menshen provides a large range of plastic closures and sponge applicators for tubes, pouches, and bottles.
Georg Menshen GmbH & Co. KG
The Dow Chemical Group Company
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