MELT FILTRATION | TECHNOLOGY
operate with 30 µm for special products. The filtration system offers steady melt pressure, minimal losses due to back flushing and without any production variations, including during replacement of the filter elements. “The expectations that Nosoplas placed on the retrofit with a Gneuss Rotary Filter have been completely fulfilled. Immedi- ately after commissioning the units, a drastic reduction in in material loss due to back flushing was observed and, at the same time, the quality of the rPET granulate produced was noticeably improved,” says Gneuss. Ettlinger, the melt filtration specialist owned by
recycling processes,” it says. Using a self-cleaning ECO high- performance melt filter with a filter fineness of 60 µm with 100% PET bottle flakes leads to particularly low residual content of contaminants, says Ettlinger. This makes the
recycled material suitable for demanding rPET
IMAGE: GNEUSS
products, not just in new bottle production, but also in sheet and strapping as well as fibres.
The major food and beverage packaging
Maag, also highlights PET bottle flakes as a recycling activity that can benefit from using new filter technology. “Calculations of the expected ROI [return on investment] and extended production trials at a major packaging manufacturer have impressively confirmed the superior performance of Ettlinger’s ECO melt filters in PET bottle-to-bottle
manufacturer (Ettlinger did not name the company) put the reliability and economy of the ECO melt filter for the rPET bottle-to-bottle process to the test during pilot production. A calculation of the ROI based on a comparison with the backflush filtration system that it previously used influenced its decision to use the ECO. Ettlinger says: “By optimisation of the upstream and downstream equipment of the extruder, including the ECO installation, replacing an
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Left: The Gneuss
RSFgenius back flushing filtration
system is well suited for retrofitting to existing extrusion lines, says the company
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