The properties of a plastic do not only depend on the base polymer. With additives, the basic properties can be modified during processing, for example, for a higher elasticity or better light stability of a plastic.
At Kunststoff-Zentrum Leipzig, innovative plastics made from renewable raw materials are being developed and tested as part of a funding project. The researchers are also looking at plasticisers, some of which are now discredited for health hazards. The aim is the use of harmless alternatives or the avoidance of these substances.
挑战：
For the processing of the starting materials in a twin-screw extruder, a liquid metering unit for the plasticizer fraction was required in addition to the solids metering.
由于挤出机是一个高压，流动的单元，因此液体计量单元可以连续添加少量添加剂 - 尽可能准确地添加液体计量单元 - 在挤出机的系统压力上。
总部位于莱比锡的塑料研究人员想给粘性添加剂剂量，该添加剂需要加热剂量单元和储罐以降低粘度。液体计量单元还应在实验设置中充分整合。
解决方案：
来自Knauer的剂量溶液是一个紧凑的给药单元，由带有加热泵头的高压剂量泵组成，用于预热粘性增塑剂和质量流量计，用于泵的精确流量控制。所有设备均已精确地用于挤出机上方的设备表（请参阅植物照片）。2020欧洲杯下注官网
这就是客户所说的：
"From our previous results, it can be seen that the precise adjustment of the proportion of plasticizer has a decisive influence on the reproducibility of the material properties. Therefore, we can recommend the metering pumps of KNAUER without restrictions "