丙酸钙改性聚乙烯抑菌薄膜制备与性能研究

以线性低密度聚乙烯(LLDPE)为基材,首先利用丙酸钙等通过双螺杆挤出装置进行共混改性,制得改性聚乙烯粒子,然后将改性聚乙烯粒子与聚乙烯树脂混合进行挤出流延,制得丙酸钙改性聚乙烯抑菌薄膜;对制得的薄膜进行光学性能、力学性能、水蒸气透过率、透气性、微观结构以及抑菌性能的测试分析。研究表明,薄膜中添加剂比例会影响到薄膜的性能,当丙酸钙的质量分数为2%、改性SD树脂的质量分数为2%时,获得的薄膜性能最佳。

Preparation and properties of calcium propionate polyethylene antibacterial film

Using linear low density polyethylene (LLDPE) as the substrate, the modified polyethylene particles were prepared by blending with calcium propionate and other materials through a twin-screw extruder. Then the modified polyethylene particles were mixed with polyethylene resin to extrusion casting, and the antibacterial film was prepared. The optical properties, mechanical properties, water vapor permeability, air permeability, microstructures and antibacterial properties of the films were tested and analyzed. The results show that the proportion of additives in the film would affect the performance of the film. When the mass fraction of calcium propionate was 2%, the mass fraction of modified SD resin was 2% and the film performance was the best.