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FDA for Gneuss bottle-to-bottle PET recycling system

The PETrecycling.cz assessment based on R&D up-to-day results is, that it should be made clear, that all beverage containers, e.g. PET bottles, ALU cans and glass bottles, that are commercially imported into Czech Republic or sold here should be included in return systems with deposits - to encourage the consumers to take the bottles back

Zdroj/Source: British Plastics & Rubber

FDA green light for Gneuss bottle-to-bottle PET recycling system (March 8, 2010)

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19.03.2010 FDA for Gneuss bottle-to-bottle PET recycling system


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The planetary extruder introduced by German filtration specialist Gneuss three years ago for reprocessing PET flake, has now received "Letter of No Objection" status from the American Food and Drug Administration (FDA) for use in bottle to bottle recycling.

The system combines the Multi Rotation Extruder (MRS) with a fully automatic melt filtration system and a solid state polymerisation unit with a short residence time where the viscosity is lifted to the required level of 0,8 (or higher).

Since its introduction the patented MRS has sold well for the processing of PET bottle flakes to food packaging products.

Gneuss describes sales as "a record order intake – and this in spite of the financial crisis".

The new FDA approval is for up to 100 per cent post consumer bottle flake and means that pellets manufactured using this process can be used in the USA for food containers of all types, both for cold and hot filled bottles (classes C to G).

Gneuss says that analyses carried out by the Fraunhofer Institute have shown that the MRS extruder is capable of processing 100 per cent post consumer flakes to pellets for food grade applications without any prior treatment of the flakes, regardless of whether the flakes were washed and if so, regardless of the flake washing system used.

Gneuss MRS Extruder (patented)

The extruder is built with a central planetary section with eight or ten small screws rotating around a main shaft, which increases surface creation by around 25 times more than in a conventional extruder and so exposing volatiles to removal by vacuum venting. Either end of the planetary section is a conveying screw. Gneuss says the design permits the processing of PET without pre-drying and requires only a water ring vacuum pump even for products with a high IV requirement. It also gives a high level of decontamination.

Benefits over conventional processes are said to be the relatively low investment and the very low energy costs and high quality of the final product.