Extrusion International 6-2019

REVIEW 54 Extrusion International 6/2019 Lindner-Recyclingtech GmbH www.lindner-washtech.com New Hot-Wash System post-consumer film as well as unpleasant odours. The more ef- fectively these materials can be removed, the higher the quality and the potential revenue. Lindner Washtech has devel- oped a three-stage hot-wash system to meet these require- ments and also ensure high productivity. Managing Direc- tor of Lindner Washtech, Harald Hoffmann: “When developing the new components, we fo- cused on effective cleaning and continuous processing so that all preceding and subsequent equipment can be operated productively at all times. That is why we based this solution on our tried-and-tested technolo- gy, combined it with the advan- tages of hot washing and delib- erately left out the otherwise common, but often vulnerable, batch processing.” The modular and compact Lind- ner hot-wash system has three stages and does not require any additional conveyors. In the first stage, the shredded and pre-washed plastics are fed into a reactor, mixed with hot wa- ter and washed. Already at this stage, mixing arms apply con- centrated friction to the mate- rial. The double discharge screw conveyor then feeds the plastics into the new hot-wash rafter in optimally dosed quantities. This is a new and improved version of the already successful rafter pre-washer, in which continu- ous friction is applied to the ma- terial to remove and separate residues effectively and gently. In the third and final stage, the Twister friction washer, a ma- chine specifically designed for this application, removes the hot water or the hot caustic so- lution. The liquid is then sepa- rately treated. Optionally the system can also be operated with caustic solu- tion to remove even stubborn fat and oil residues, as well as glue. The downstream water treatment system continuously monitors the water’s alkaline content and automatically ap- plies the necessary chemicals. Alongside Lindner’s modern and robust shredders, the inno- vative hot-wash system is a key component in Lindner’s new system solutions for plastics re- cycling. Recyclates that are barely distin- guishable from virgin material – that’s what plastics processing specialist Lindner had in mind when developing the new hot- wash system to be presented at the K 2019. In addition to effec- tive cleaning, the solution offers not only high but above all con- tinuous output. Gone are the days when products made of recycled plastics were a well-intentioned but marginal phenomenon. Markets, and in particular big brands, have to react to the sustainability trend and are demanding ever-higher quality recyclates in ever-increas- ing quantities. To deliver this high quality, complex process- ing systems – and here, in par- ticular, washing technology – are needed. One specific challenge is posed by undesirable materi- als stuck to post-commercial and The new Linder Washtech hot-wash system cleans effectively in three stages and guarantees continuous output