Extrusion International 6-2021

41 Extrusion International 6/2021 RECYCLING “The two LNOs are another impor- tant achievement for Starlinger in the fi eld of food grade recycling”, said Paul Niedl, Commercial Head of Starlinger recycling technology. “Like it is the case with PET, 100 % recycled HDPE can now be used in applica- tions with direct food contact. There is keen market interest for this – all signs are pointing towards a circular economy.” An elementary step: Odour reduction The new Starlinger machine concept consists of a recoSTAR dynamic re- cycling line with a C-VAC degassing module and downstream odour re- duction technology. The removal of odours plays an important role in the production of food-grade recyclate made from post-consumer HDPE. “Packaging made of HDPE is used for a lot of foods“, explained Niedl. „If, smells in the following production steps. “With the development of the circu- lar economy, HDPE bottle-to-bottle recycling will gain increasing impor- tance“, emphasised Paul Niedl. „A big share of food packaging such as milk and juice bottles, bottle caps as well as food trays for meat is made of HDPE. If this packaging is returned to the recycling stream and reused as food packagingwithout downcycling, millions of tons of virgin HDPE can be saved in the future.” for example, substances from food scraps migrate into the plastic, they can cause unpleasant smells in the re- cycling process. To avoid this, we use our three-step procedure: It starts with material preparation, followed by highly ef fi cient degassing in the C-VAC module, and is fi nalized with the thermal after-treatment of the produced regranulate. This method ensures that even deeply embedded odours are removed.” Contrary to methods which bind the odours by means of additives and enclose them in the regranulate, the Starlinger process removes the substances caus- ing the odours and delivers perma- nently odour-reduced pellets which do not release unwanted 100 % rHDPE – FDA Gives Green Light for Recycling Process rHDPE pellets produced frommilk bottles and canisters In August 2021 Starlinger & Co GmbH received two Letters of No Objection (LNO) issued by the US Food and Drug Administration FDA regarding its newly developed machine concept for processing post-consumer HDPE scrap. The LNOs apply to the HDPE bottle-to-bottle and cap-to-cap recycling processes respectively, and con fi rm that HDPE regranulate produced with the Starlinger recycling process can be used at levels of up to 100 % in packaging with food contact. Already in 2012 Starlinger received its fi rst FDA LNO for the use of recycled HDPE HDPE milk bottles Starlinger recycling technology Furtherstr. 47, 2564 Weissenbach, Austria www.recycling.starlinger.com Starlinger recoSTAR dynamic with C-VAC degassingmodule and downstreamodour reduction technology