TECHNOLOGY | RECYCLING LINES
between quantity and quality must be appropriate and that the Leistritz ZSE MAXX extruder is ideally suited for this due to its Do
/Di ratio of 1.66. The
higher volume in the extruder results in less stress on the recycled material at constant speed. This is often reflected in better mechanical values that may allow formulation adjustments in terms of costs, depending on the quality of the starting material.
Bausano twin-screw extruders can produce granules obtained from the recovery of rigid and flexible PVC to a high stand- ard. Pic: Bausano
hard to recycle, dispose of or sold by manufactur- ers. Relying on its effective mixing and control of the shear conditions, Bandera twin-screw offers effi- cient processing of different materials such as PE and PA, obtaining a homogeneous mixture. Furthermore, it prevents sensitive polymer degra- dation like EVOH, avoiding black spots and yellowing. Experimentally speaking, outcoming pellets are stable, homogeneous and 100% resusable to produce new thin films with thickness- es up to 20 microns, while preserving good optical and mechanical properties and closing completely the post-industrial waste recycling loop.” Leistritz Extrusionstechnik has supplied compounding plant to German recycling specialist Sysplast. This will increase the recycler’s annual production capacity of ABS regranulates by 4,800 tonnes from the start of 2022. The regranulates are comparable to virgin material and the new extru- sion line can also process other engineering plastics, such as PC/ABS, polyamides and polyole- fins. The new extrusion line includes a ZSE 60 MAXX twin-screw extruder. Leistritz adds that it started to expand its activities in the recycling sector several years ago and this order further demonstrates its competence in this segment. Leistritz says that in the recycling sector, the ratio
Italian company Binova has recently supplied a plant for a French customer for the recycling and recompounding of ABS and polystyrene scraps. The system employs a 92-48 L/D co-rotating twin-screw extruder, equipped with continuous double filtration, for the production of high-quality pellets. The plant can reach a production rate of around 1,200 kg/h, depending on the characteris- tics of the processed material. A further project involved a plant for the compounding of PP, PE and PS scraps, with a production capability of 1,500 kg/h, equipped with co-rotating twin screw extruder EBB92/44LD and compactor, installed by a Spanish company that chose Binova as partner for this investment. According to Italian extruder manufacturer
Bausano, PVC is a good material to move to a circular economy. PVC can be recycled more than eight times due to its polymeric structure, while maintaining the same performance levels. In that sense, granulation is one of the best processes to transform end-of-life PVC products or residues resulting from other industrial processes into new raw materials. Nonetheless, one of the main challenges in recycling PVC lies in converting the regenerated material into a high-quality product. Bausano says that its twin-screw extruders can meet this requirement, producing granules obtained from the recovery of rigid and flexible PVC to a high standard. The company adds that the extrusion process of residues or waste, to be treated with additives,
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