Extrusion Asia Edition 2-2021

43 Extrusion Asia Edition 2/2021 使用 OP5进行MVR在线测量，与手动测量对比 注意：如果 MFR 值在生产中动态地变化，OP5 采样和实验室测 量之间的时间差异足以导致数据的大差别。 OP5 在线测量的高 测量速率现在显示了高波动 （©OCS） Online MVR Measurement with OP5 vs. Manual. Note: If the MFR value changes dynamically in production, small time intervals between the sampling of OP5 and labo- ratory measurement are sufficient to result high differences. The high fluctuations are now shown by the high measuring rate of the online measurement of the OP5 (© OCS) ➠ OCS Optical Control Systems GmbH Wullener Feld 24, 58454 Witten, Germany www.ocsgmbh.com P lastics are produced in countless variants today. The most common is polyethylene. Modern processes mean that there are also different variations of this material today. Low-density polyethylene, or LDPE, produced using a high-pressure process, is one of them. Transformadora de Etileno A.I.E. (TDE) has three plants for the production of low density polyethylene (LDPE) in Spain. The an- nual capacity of LDPE is approximately 160,000 t/year. TDE fo- cuses on continuous quality control and assurance in the on- going production process in order to detect and optimise dyna- mic production fluctuations at an early stage and in a relatively short sequence. For this reason, two OP5 measuring systems are already in use in two of three production lines. Various de- viations in production have an impact on viscosity and can the- refore be monitored by online viscosity measurement using OP5. The continuous measurement of the Melt Index (MI) of polymer samples also allows a final classification of the batch material. Save time and reduce costs Due to the continuous measurement, real-time results can be visualised in 5 to 10 minutes via the touch panel with a data trend in 24/7 operation. This leads to considerable time savings compared to a manual ISO 1133 measurement. The permanent data logging makes it possible to intervene significantly in the production process and save costs. High reproducibility through OP-MFR measurement The OP5 MFR measurement is a method carried out by means of exact control of the melt flow in combination with a high- precision and self-developed melt pressure measurement. This method achieves a typical reproducibility of +/- 1 % in compa- rison to the manual ISO 1133 measurement with +/- 5 to 10 % deviation. OCS OP5 在线 MVR 测量对比手动实验室测量 Online MVR Measurement by OCS OP5 Vs. Manual Laboratory Measurement 数值 / V alue 时间 / Time MVR – 使用 OP5（在线）测量 MVR – with OP5 (online) MVR – 实验室手动测量 MVR – manual in lab Laboratory & quality control in plastics processing ”ÐÅ ÆďĊåÐīÐĊÆÐ Ȣ ǧȘǠǡȘǡǟǡǠ lab.extrusion-info.com