Höftberger Thomas, Zitzenbacher Gernot, Burgstaller Christoph
Transfercenter für Kunststofftechnik GmbH, Franz-Fritsch-Str. 11, 4600 Wels, Austria.
School of Engineering, University of Applied Sciences Upper Austria, Stelzhamerstr. 23, 4600 Wels, Austria.
Polymers (Basel). 2024 Sep 28;16(19):2745. doi: 10.3390/polym16192745.
Short-fiber reinforcement is a potent approach to improving the material properties of injection-molded parts. The main consideration in such reinforced materials is to preserve the fiber length, as this is the major influence on the properties of a given composite. The aim of this work was to investigate the different influencing parameters in injection molding processing on the properties of short carbon and glass fiber-reinforced polypropylene. We investigated parameters like melt temperature and back pressure, but also machine size and pre-heating regarding their influence on the tensile properties. We found that adjustments of melt temperature and back pressure only yield small improvements in the fiber length and the tensile properties, also depending on machine size, but a pre-heating step of the granules can significantly improve the properties.
短纤维增强是改善注塑部件材料性能的有效方法。此类增强材料的主要考虑因素是保持纤维长度，因为这对给定复合材料的性能有主要影响。这项工作的目的是研究注塑成型过程中不同的影响参数对短碳纤维和玻璃纤维增强聚丙烯性能的影响。我们研究了诸如熔体温度和背压等参数，还研究了机器尺寸和预热对拉伸性能的影响。我们发现，熔体温度和背压的调整只会在纤维长度和拉伸性能方面带来微小的改善，这也取决于机器尺寸，但颗粒的预热步骤可以显著改善性能。
