Extrusion Asia Edition 1-2023

21 Extrusion Asia Edition 1/2023 CENTERWAVE 6000 360° 测量大规格管道 • 测量外径在 32 - 3,200 mm 的管材 • 最小壁厚 1.6 mm • “ 一键式操作 ” —— 无需校准，无需预设产品参数 • 对管道进行 360° 测量 • 冷值的动态收缩与熔垂预测 www.sikora.net 欢迎莅临 2023 CHINAPLAS 我司展位 10F35 ➠ SML www.sml.at rolls and jumbo rolls an also be manufac- tured, with ease, with this new solution. “The trigger to develop a new winding system for 2” hand rolls for our 4.5 m wide PowerCast XL line came right from our customers. As a starting-point for our development works we took the proven double turret winder W4000-4S”, Tho- mas Rauscher explains. The technical basis of the new winder W4000-4S-3T is the patented ‘three turrets-in-one-frame concept’. Compared to other winders for wider lines, the three winding shafts with 1.5 m each are relatively short. This gua- rantees very stable production processes and allows significantly higher production speeds, especially at hand rolls. Heat-resistant C-PET Light Cup Promotes Circular Economy SML has joined forces with its partners Sukano AG and Kiefel Packaging B.V. The result of their common R&D is a C-PET light cup that combines transparency and recyclability as well as suitability for ther- moformed hot-filling or microwavable products. Further advantages include short cycle times during thermoforming and a high stiffness. The newly developed C-PET light can thus be a reasonable op- tion for manufacturers looking for an economic and easy-to-recycle alternative to PP and PS. Transparency for recyclability “Because easy recyclability is becoming increasingly important, we opted for a transparent C-PET solution at an early stage of our joint research and develop- ment work” says Max-Phillip Lutz, Pro- duct Manager at SML. Compared with other coloured PET or PP and PS products, the recycling process of C-PET light is con- siderably easier. C-PET light film can be smoothly reprocessed in existing facilities together with other post-consumer or post-industrial PET materials. Alternative to PS and PP In general, C-PET is temperature resistant up to 220°C. However, this is not neces- sary for many applications and limits the output in thermoforming. In contrast, C- PET light was developed to withstand a maximum temperature of 100°C. The new C-PET light enables the manufactur- ing of transparent thermoforming pro- ducts for hot-fill applications up to 100°C at output volumes comparable to those of conventional A-PET processes. Especi- ally the shorter cycle times during ther- moforming are an economic advantage compared with conventional C-PET. Adjusting process technology All three project partners shared their spe- cific expertise and their profound experi- ence in their respective areas in order to improve every single step in all processes. The main technical challenges were to find the optimum dosage for the addi- tives, to adjust the formulations and the process technology during film produc- tion, and to find the right parameters for the thermoforming process.