K2022 | EXHIBITION PREVIEW
systems to recycle PET, which has been the subject of several development projects. It will show the results of these within the VDMA Circular Economy Forum. Its centrepiece is a system built around a ZSK 58 Mc18 twin-screw extruder configured for making high-quality PET using recycled materials. To feed voluminous flakes and fibres (made from
PET or other plastics) efficiently into the twin-screw extruder, Coperion will show the SWB-300 Smart Weigh Belt Feeder with a S100 single screw pre-feeder, plus the new ZS-B 70 MegaFeed side feeder. The SWB, a gravimetric feeder from Coperion K-Tron, can process large volumes of bulk materials with a variety of flow properties at high accuracy. Using the side feeder, plastic recyclate with a bulk density under 200 kg/m³ – typically considered not worth recycling – can be fed in large quantities into smaller sizes of twin-screw extruder to be recycled and compounded. Melting, devolatilisation and complete homog-
enisation take place in the process section of the ZSK, before the material is pelletised. The pellets are condensed in the solid state polycondensation (SSP) reactor – after which they can then be processed into film, bottles or fibres. PET recycled in this way
Coperion’s ZS-B Mega- Feed can help recover
and recycle low-density plastic waste
has been approved by the US Food and Drug Administration (FDA) for direct contact with food. Conventional technologies for recycling PET
require pre-drying and crystallisation, but Coperi- on’s technology allows PET recyclate to be intro- duced directly into the ZSK extruder. “The ZS-B MegaFeed makes recycling of some plastic film and flake possible in the first place,” said Marina Matta, team leader of process technol- ogy engineering plastics at Coperion. “We will
DIMPLED SHEET LINES
BG PLAST IMPIANTI s.r.l. Via Venezia 232 21050 Marnate - Italy Phone: +39 0331 365 865
info@bgplast.it
IMAGE: COPERION
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