Gneuss Kunststofftechnik GmbH received a letter of non-objection from the U.S. Food and Drug Administration for recycling PET with the firm's MRS extrusion systems without pre- or post-treatment.
The Bad Oeynhausen, Germany-based company said its process is the first to win FDA approval without pre- or post-treating such as drying, drying under a vacuum or crystallizing.
The letter allows recyclers to use a Gneuss MRS extruder, its devolatilizing system and the rotary melt-filtration system to reprocess up to 100 percent unwashed PET bottle flake, accord- ing to an April 7 news release.
The company credits the large polymer-melt surface area in the multiple-rotation section of the extruder, together with a rapid melt exchange and optimized venting, for the approval.
In the U.S., Gneuss Inc. is based in Matthews, N.C.