Calcium carbonate (CaCO₃) is frequently added to polyethylene (PE) as a filler to reduce costs. An alternative to CaCO₃, calcium fluoride (CaF₂) was proposed in this research. PE/CaCO₃ and PE/CaF₂ composites in a wide composition range (0–60 wt.%) were prepared through a parallel twin screw extruder. Results indicated better interaction of CaF₂ with PE matrix which improved samples yield stress. Statistical analysis showed the filler type was more influential factor on the yield stress while filler loading was not a statistically significant one. In contrast, crystallinity was strongly depended on the filler loading. The dynamic mechanical and rheological investigations revealed that PE/CaF₂ composites had higher stiffness at ambient temperature and possessed lower viscosity below 40 wt.% of filler loading compared to PE/CaCO₃ which could reduce the processing cost. Therefore, regarding its low price and good functional properties, CaF₂ can be a promising alternative to CaCO₃.

碳酸钙 (CaCO ₃ ) 经常作为填料添加到聚乙烯 (PE) 中以降低成本。本研究中提出了一种替代 CaCO _{3 的}氟化钙 (CaF ₂ )。PE/CaCO ₃和PE/CaF ₂复合材料在很宽的组成范围内（0-60 wt.%）是通过平行双螺杆挤出机制备的。结果表明 CaF _{2 的}相互作用更好与提高样品屈服应力的 PE 基质。统计分析表明，填料类型是对屈服应力的影响更大的因素，而填料负载量在统计上并不显着。相比之下，结晶度很大程度上取决于填料负载。动态力学和流变学研究表明，与 PE/CaCO ₃相比，PE/CaF ₂复合材料在环境温度下具有更高的刚度，并且在低于 40 wt.% 填料负载时具有更低的粘度，这可以降低加工成本。因此，就其低廉的价格和良好的功能特性而言，CaF ₂可以成为CaCO ₃的有前途的替代品。