{"id":43072,"date":"2021-03-15T14:23:53","date_gmt":"2021-03-15T13:23:53","guid":{"rendered":"https:\/\/packaging-journal.de\/?p=43072"},"modified":"2021-03-18T11:09:21","modified_gmt":"2021-03-18T10:09:21","slug":"avoid-unwanted-migration-from-pcr","status":"publish","type":"post","link":"https:\/\/packaging-journal.de\/en\/unerwuenschte-migration-aus-pcr-vermeiden\/","title":{"rendered":"Avoid unwanted migration from PCR"},"content":{"rendered":"

Blow moulding specialist W. M\u00fcller has tested two methods for using post-consumer recyclates (PCR) in packaging that can reduce unwanted migration from the PCR.<\/p>\n

In the first variant analysed, the PCR layer is surrounded by two layers of virgin material, while in the second variant it is shielded by an internal plasma coating. The results of both variants showed considerable Lower migration values<\/strong> than hollow bodies made of pure PCR.<\/p>\n

Miller<\/a> has many years of experience in the use of PCR for the production of hollow bodies using the blow moulding process. The company's own 3-layer co-extrusion system, called ReCo3, can be used to produce bottles consisting of a PCR layer that is inside and outside with a layer of virgin material<\/strong> is surrounded. In this way, virgin material can be replaced by PCR during processing, and unwanted migration from the PCR<\/a> be reduced.<\/p>

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The two bottles are made entirely of PCR. The bottle on the right has a CHF coating from Delta Engineering on the inside. (Image: W. M\u00fcller)<\/figcaption><\/figure>\n

The company has had tests carried out to see how the Migration behaviour of round bottles<\/strong> with a volume of one litre made from 100% recycled material differs from those produced using the ReCo3 process. Two certified PCR types were selected and one bottle was produced from the pure material and one with a virgin coating.<\/p>\n

PCR surrounded inside and outside by a layer of virgin material<\/h2>\n

Various migration tests for potentially migratable impurities, reaction and degradation products (non-intentionally added substances (NIAS)) were carried out at the SGS Institut Fresenius in Taunusstein. The ReCo3 bottles showed lower global migration. This was also shown in a significant reduction<\/strong> the number and concentration of NIAS capable of migration compared to bottles made of pure recyclate.<\/p>