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1. (WO2018222142) PROCESS AND DEVICE FOR SEPARATION AND RECOVERY OF WASTE CARPET COMPONENTS

Pub. No.:    WO/2018/222142    International Application No.:    PCT/SI2017/000012
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Tue May 30 01:59:59 CEST 2017
IPC: B03B 9/06
B29B 17/02
Applicants: AquafilSLO d.o.o.
Inventors: JAHIC, Denis
RISATTI, Carlo
MAROLT, Damijan
MARGON, Vid
Title: PROCESS AND DEVICE FOR SEPARATION AND RECOVERY OF WASTE CARPET COMPONENTS
Abstract:
An improved process and device for separation and recovery of waste carpet components, wherein waste carpets are predominantly composed of a face fiber material, a backing material and an adhesive coating which includes latex and filler, is disclosed. In the proposed process practically all of the filler, i.e. calcium carbonate, is removed prior to fine grinding and passing the mixture to a high speed centrifuge for separation of the face fiber material from the backing material. In the proposed process the fine grinding of the material to be recycled is done only once right before passing the mixture to the centrifuge by which the loss of the fiber material is highly reduced before its separation into nylon and polypropylene and also the life time of the fine grinder and the centrifuge is prolonged. The material which passes to the centrifuge contains in this step only minimal amounts of the filler. Inorganic filler is hard and abrasive and can, if present in higher amounts, cause faster wear of the fine granulator and the centrifuge. The use of only one centrifuge makes the proposed process also cost effective.