Objective:To ensure the accuracy of density measurement of polypropylene infusion bottle,the influence factors of the key operation steps were studied to determine the significance of the impact,so as to guide the experimental operation. Methods:The custom test design was applied to design the experiment to study the influence of sampling amount,immersion depth,heating reflux,sampling position and brand on the density measurement results of polypropylene infusion bottle. Results:The procedure of performing a heating reflux had a significant effect on the measurement results,and the density of polypropylene infusion bottle increased significantly after the procedure. At the same time,the bottom density of the bottle was slightly higher than that of the bottleneck. The effect of other factors was not significant. Conclusion:The customized test screen out the significant influence factors of the density measurement for the polypropylene infusion bottle economically and effectively,which offers a powerful tool to investigate the influence factors of measuring method.
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