In view of the toughness and processing difficulty of high-density polyethylene (HDPE) film, the HDPE was modified by polypropylene (PP) and linear low density polyethylene (LLDPE), and the melt index, haze, dart impact strength, elongation at break were characterized. In addition the infrared spectra (IR), scanning electron microscopy (SEM), infrared image analysis, and differential scanning calorimetry (DSC) data were obtained. The results showed that the toughening effect of the 10%PP/30%LLDPE/60%HDPE composition was the best; the haze was reduced 6% and its dart impact strength and elongation at break were increased by 27.3% and 47%, respectively, relative to the pure HDPE. The blend of 10%PP/30%LLDPE/60%HDPE had compatibility. The melting point of the 10%PP/30%LLDPE/60%HDPE blend film increased by 5 °C compared with the pure HDPE film, with the results indicating the application fields of HDPE film could be widened.

鉴于高密度聚乙烯（HDPE）薄膜的韧性和加工难度，HDPE被聚丙烯（PP）和线性低密度聚乙烯（LLDPE）改性，其熔体指数，雾度，落镖冲击强度，断裂伸长率被表征。此外，还获得了红外光谱（IR），扫描电子显微镜（SEM），红外图像分析和差示扫描量热（DSC）数据。结果表明，10％PP / 30％LLDPE / 60％HDPE组合物的增韧效果最好；相对于纯HDPE，雾度降低了6％，落镖冲击强度和断裂伸长率分别提高了27.3％和47％。10％PP / 30％LLDPE / 60％HDPE的混合物具有相容性。与纯HDPE薄膜相比，10％PP / 30％LLDPE / 60％HDPE混合薄膜的熔点提高了5°C，