Extrusion International 1-2023

37 Extrusion International 1/2023 EXTRUSION TECHNOLOGY, RECYCLING ings. The former, by virtue of its chemical properties promotes melt flow during processing. The second is made through a coating with ce- ramic properties, which has a low coefficient of friction and is able to cope with aggressive environmen- tal conditions. It is, in fact, ideal for extrusion and molding processes of polymers containing chloride and fluoride. Finally, these coatings, which are applied on screws, extru- sion heads in addition to granula- tion die plates and manifolds, are a guarantee of plant operational continuity over time and of low maintenance costs. Specially designed components down to th smallest detail Among the advantages offered by Bausano in the area of design- ing lines for re-processing scrap material is the study of several variables which affect the process- ing of raw material: cylinder tem- perature, screw rotation speed and pressure. First, in order to eliminate stagnation zones that can cause material degradation, Bausano designs screws by taking into analysis the diameter, length, pitch, channel depth and compres- sion ratio. Second, screws should not have special mixing zones (Notching zones), as this would compromise the quality of the ex- trudate. Bausano also provides a degassing system, an innovative screen changer with filter meshes with a special geometry to prevent stagnation and with an automatic breaker plate ejection system. Fi - nally, of vital importance is the careful control of the temperature at which gelation is achieved, in the range of 150°C to 170°C de- pending on the formulation. E-GO R, revolutionizing polyolefin recycling Bausano previews the next-gen- eration E-GO R extruder, designed for recycling and repelletizing post- industrial and post-consumer waste, both highly humid and heavy films, with low water content. These in - clude HDPE, LDPE and PP. The con - taminated material, after the wash- ing and crushing stage, is conveyed into the extruder by a force-feeding system specifically designed accord - ing to the type of use. In the process, moisture and volatiles are removed by means of a single- or dual-zone degassing system. The extruded mass is then filtered and directed to the water or immersion cutting sys- tem for perfect uniformity of the ob- tained granule surface. "In a context in which the regen- eration of plastics plays an increas- ingly central role, making use of specifically designed solutions be - comes an essential prerequisite in order to reap the maximum bene- fits," says Giorgio Critelli, USA Tech - nical Sales Manager at Bausano, who adds "At Bausano, in addition to customizing extrusion lines ac- cording to the application and the Customer's needs, we also aim at guaranteeing the highest quality at the technical-performance level, at every single stage of the process, thanks to our in-house design and development department. In fact, we devote special care to selecting the best materials and we intervene on the components that require the most attention with innovative treatments and coatings that make our extruders even more durable and high-performance. An added value that Customers can touch ev- ery time they rely on our lines for their plastics processing projects." Bausano & Figli Spa C.so Indipendenza 111, 10086 Rivarolo Canavese (TO), Italy www.bausano.com