Extrusion Asia Edition 1-2020

35 Extrusion Asia Edition 1/2020 Herbold Meckesheim GmbH Industriestr. 33, 74909 Meckesheim, Germany www.herbold.com 2）实现再生原料和纯新原料的一致：为了生产高质量的 再生原料，Herbold开发了优化的洗涤程序，可以在新产品中 使用高比例的再生塑料原料。与过去的程序相比。主要的标 准是相当大程度的减少气味和几乎没有任何由于外来颜色和 残留污染物所造成的外观误差。 这些解决方案是通过以下过程步骤的巧妙构思和组合而 得以实现的：减小尺寸、洗涤、分离和干燥，以及减小颗 粒、薄膜和纤维的尺寸。对于PET和聚烯烃瓶子的回收利 用，Herbold成功地开发出了节能的尺寸减小和（热）清洗系 统，具有质量高、运行成本低的特点。 T he reason for this sudden rise in demands can be explained by the simultaneous action of regional driving forces and long-term technological trends. Among these driving forces are EU programs and subsidies, the decision of different countries to make up for their obvious de- ficits in recycling plastics, above all France and Germany. Among the regional driving forces are also countries that all too much relied on the export of their waste to China. Among them are not only Ireland and Germany but also Australia, New Zealand and Japan. Among the regional driving forces is also China where they started to build a modern waste industry. Similar, but much smaller in Russia. Another point is that a self-sustaining recycling industry has risen in the US, in Canada and Mexico that, graded according to the degree of difficulty, treats all kinds of waste according to the recycling knowledge developed in Europe. In this area con- siderable quantities are available, above all film waste looking for a different use than landfill and incineration. Two technological trends have emerged: 1) Chemical recycling: different market participants are work- ing on solutions and a lot of larger plants are being built in North America and Europe. In this field, the procedures sup- plied by Herbold are in demand in order to treat the flow of waste in a cost-saving, high-performance way and a constant high-level quality. 2) Equal to virgin recycled plastic: For the production of high- quality recycled material, Herbold has developed optimized washing procedures that allow to use a high percentage of re- cycled plastic material for new products. The main criteria com- pared with procedures of the past are a considerable odour re- duction and hardly any visual errors caused by foreign colours or residual contamination. These solutions are rendered possible by the clever conception and combination of the following process steps: size reduction, washing, separation and drying as well as compacting of fines, films and fibres. As far as film recycling is concerned, Herbold is one of the most successful plant manufacturers. For the recy- cling of PET and polyolefin bottles Herbold succeeded in deve- loping energy-efficient size reduction and (hot) washing sys- tems characterized by not only a high quality but also by low operating costs.