Extrusion Asia Edition 2-2019

挥发性成分。就该系统的应用而言，在循环经济大背景下， 仍有巨大的潜力有待挖掘。” 无论使用何种原材料，Multi-Touch辊组都能确保优异的 片材质量。这类辊组采用特殊功能原理，片板或板材的顶部 和底部几乎可以同时冷却，从而可达到更高的透明度和平整 度。同时，由于有效辊隙数量增加，可以显著减小公差。减 小幅度可达50％至75％。两个主要预校准辊以45°位置设置， 非常适合加工PET。 目前包装行业面临的许多关键问题与其产品的可回收性 有关。具有相应性能特征的单一材料产品、替代材料组合或 生物塑料是“面向回收设计”背景下考虑的一些方案。 Stieglitz 博士表示：“我们相信，新实验室生产线不仅能展示我们在该 领域的机器专业技术，还能为我们客户提供特殊服务，使他 们能够与我们合作，在生产条件下生产和测试最优片材。” T he core components of the pilot plant line are the high- speed extruder 75 T6.1, the STARextruder 120-40, and the Multi-Touch roll stack with a width of 1,400 mm. The three modern units clearly demonstrate that the specialist in sheet and board extrusion is committed to developing and improving its individual components and, hence, its complete extrusion lines on a continual basis and is constantly adapting to changing requirements in the industry. The extrusion line com- prises the two main extruders and a 45 mm co-extruder, each with a multi-component dispensing unit, melt pump, and screen changer, a feed block for B, AB, BA, or ABA layer struc- tures, as well as the Multi-Touch roll stack with subsequent winder. Depending on the configuration, the line can achieve a maximum output level of 1,900 kg/h for PP or PS and around 1,200 kg/h for PET with line speeds of up to 120 m/min. When pilot plant tests are carried out, the relevant machine components are combined in line with the product specifica- tion. If materials such as PS, PP or PLA are to be processed into sheets, the high-speed extruder is used as the main extruder. The tried-and-tested compact processing machine with a screw diameter of 75 mm and a processing length of 40 D is very energy-efficient and now offers better performance levels than Multi-Touch压光机 Roll Stack Multi-Touch 23 Extrusion Asia Edition 2/2019 ever before. High-speed extruders ensure optimum melt characteristics and enable rapid product changeovers. The STARextruder, on the other hand, is ideal for producing PET sheets from new or recycled materials. The single-screw extrud- er with central planetary roll section processes the melt very gently and achieves exceptional degassing and decontamina- tion rates thanks to the large melt surface in the central sec- tion. “The STARextruder really comes into its own when pro- cessing recycled materials, as it reliably removes volatile compo- nents from the melt. When it comes to the possibilities that this system can offer in the context of the circular economy, there is still a huge amount of untapped potential,” says Dr. Henning Stieglitz. The Multi-Touch roll stack ensures outstanding sheet quality re- gardless of the raw materials used. The special functional prin- ciple of this type of roll stack means that the top and bottom of the sheet or board can be cooled almost simultaneously, thus achieving much better transparency and flatness. At the same time, the tolerances can be significantly reduced due to the in- creased number of effective nips. Reductions of 50 to 75% can be achieved. The two main precalibration rolls are arranged in a 45° position – ideal for PET processing. Many of the key issues facing the packaging industry at the moment relate to the recyclability of its products. Mono-pro- ducts with a corresponding properties profile, alternative mate- rial combinations, or bioplastics are just some of the options being considered in the context of “design for recycling”. Dr. Stieglitz: “We are confident that the new pilot plant line will not only demonstrate our machine expertise in this sector, but will also provide our customers with a special service, enabling them to work together with us to produce and test optimized sheets under production conditions.” battenfeld-cincinnati Germany GmbH Grüner Weg 9, 32547 Bad Oeynhausen, Germany www.battenfeld-cincinnati.com