{"id":77924,"date":"2023-04-06T12:07:27","date_gmt":"2023-04-06T10:07:27","guid":{"rendered":"https:\/\/packaging-journal.de\/?p=77924"},"modified":"2023-04-07T16:59:47","modified_gmt":"2023-04-07T14:59:47","slug":"jowat-tear-off-thread-adhesive","status":"publish","type":"post","link":"https:\/\/packaging-journal.de\/en\/jowat-abreissfaeden-klebstoff\/","title":{"rendered":"Jowat researches improved thread tension"},"content":{"rendered":"
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Adhesive contamination on machines leads to inconvenient cleaning work. <\/strong>Instead of getting annoyed about the symptoms, it is better to tackle the root of the problem. Adhesives expert Jowat has tackled this issue and, often with just a few optimisations, works with its customers to implement cleaner and therefore more resource-efficient and sustainable packaging processes.<\/strong><\/p>

Sealing packaging with hot melt adhesive is a success story: Nothing is as efficient, flexible and reliable in the long term. The hot adhesive is applied to the gluing points in dots or beads using nozzles. The undesirable phenomenon that often occurs here is that the actual adhesive bead drags a hair-thin thread behind it.<\/strong> A common euphemism for this is the term \u201eangel hair\u201c. In specialist circles, this is referred to as thread pulling or thread breakage.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Problem recognised<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The length of these thin threads determines the degree of the resulting soiling in continuous industrial operation. If they measure only millimetres on a single caterpillar, they quickly grow to considerable quantities in large numbers.<\/strong> This not only wastes adhesive, but also increases the amount of cleaning required. The result is longer maintenance times and production downtimes.<\/p>

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The triumphant advance of PO hotmelt adhesives is further exacerbating the problem, as this technology is characterised not only by its excellent stability in the melter but also by its broad adhesion spectrum. They adhere well to many surfaces - including machine parts. This makes cleaning and maintenance more difficult. This makes it all the more important that the adhesives only end up where they fulfil their intended purpose.<\/strong> In the worst-case scenario, you end up with dirty and therefore unsaleable goods that have to be laboriously reconditioned or disposed of.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Bead application with visible thread tension (Image: Jowat)<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Numerous factors influence thread breakage. If several of them combine unfavourably, the resulting accumulations of threads can form impressive webs. Depending on their size, they are sometimes reminiscent of the realm of the giant spider Aragog from \u201eHarry Potter\u201c. However, such shortcomings can be remedied without the power of magic by identifying and optimising the possible causes point by point<\/strong> - from the process to the application equipment to the adhesive itself.<\/p>