异型缓冲垫的静态缓冲性能

Static Cushioning Performance of Irregular-shaped Cushions

中文关键词: 缓冲垫  异型  静态缓冲特性  缓冲系数  刚度

英文关键词: cushion  irregular shape  static cushioning performance  cushioning coefficient  rigidity

中文摘要:

      目的 研究异型缓冲垫的静态缓冲性能，明确其与普通缓冲垫的性能差异。方法 以发泡聚苯乙烯(EPE)为试验材料，将其切割成正棱台异型缓冲垫；利用万能压力试验机分别对等效面积相同但侧面倾角不同的试样进行静态压缩试验；绘制应力-应变曲线、能量吸收曲线和缓冲系数曲线；将上述曲线与正六面体普通缓冲垫数据进行对比。结果 异型缓冲垫较普通缓冲垫刚度小，且侧面倾角越小刚度越小。在相同应力水平下，异型缓冲垫与普通缓冲垫的能量吸收基本相同；在相同应变水平下，异型缓冲垫的能量吸收小于普通缓冲垫。载荷不大时，异型缓冲垫的缓冲系数小于普通缓冲垫，随着应力水平的增加，两者间的差距呈减小趋势。结论 异型缓冲垫的静态缓冲性能与普通缓冲垫有明显区别，在缓冲包装设计时应根据实际情况进行充分考量，以免造成过度包装或欠包装。

英文摘要:

      The work aims to study the static cushioning property of irregular cushions to pinpoint their difference from ordinary cushions in property. With expanded polyethylene (EPE) as the test material, it was cut into a prismoid cushion. The universal compression tester was used to carry out the static compression test on the samples of the same equivalent area but different side dip angles. Stress-strain curves, energy absorption curves and cushioning coefficient curves were plotted. Comparisons on the data between the above-mentioned curves and the regular hexahedron cushions were made. The rigidity of the irregular cushions was smaller than that of regular cushions. The rigidity became smaller with the decrease in the side dip angle. The energy absorption of the irregular cushions approached that of the regular cushions at the same stress level. However, the energy absorption of irregular cushions was smaller than that of the regular cushions at the same strain level. The cushioning coefficient of the irregular cushions was smaller than that of the regular cushions when the load was small. The difference was not significant with the increase of the stress. There is a significant difference in the static cushioning property between the irregular and regular cushions. Therefore, to avoid excessive packaging or insufficient packaging, considerations should be carefully taken for the design of cushioning package according to the specific circumstances.