摘要
目的以发泡聚丙烯为研究对象,研究厚度和密度对发泡聚丙烯静态压缩性能的影响规律。方法通过静态压缩试验,得出不同密度和厚度下的力-位移曲线,进一步处理得到应力-应变曲线、能量吸收效率曲线以及比吸能、总能量吸收图和抗压强度。通过这些曲线分析密度和厚度对发泡聚丙烯材料静态压缩性能的影响。结果密度、厚度不同的发泡聚丙烯材料,其应力-应变曲线的形态基本相同。当厚度一定时,密度越大,总能量吸收、比吸能及抗压强度也越高。当密度一定时,材料越厚,其总能量吸收越高、比吸能越低,厚度对密实化应变和抗压强度的影响可忽略。结论在对缓冲包装进行优化设计时,为了防止出现过度包装导致资源浪费或欠包装导致被包装物出现损毁等情况,应充分比较泡沫材料的厚度和密度对缓冲和吸能性能的影响,并根据试验对比结果选择最优方案。
The work aims to study the law of effects of thickness and density on the static compression properties of expanded polypropylene foam by taking the expanded polypropylene foam as the research object. Through the static compression test, the load-displacement curves of different density and thickness were obtained. Then, the stress-strain curves, the energy absorption efficiency curves, the specific energy absorption （Es） , the total energy absorption （Ea） and the crushing strength were obtained by further processing. The effects of density and thickness on the static compressive properties of expanded polypropylene foam were analyzed by these curves. The shapes of stress-strain curves of expanded polypropylene foam with different density and thickness were basically similar. When the thickness was constant, the total energy absorption, specific energy absorption and crushing strength increased with the increase of density. When the den-sity was constant, the total energy absorption increased with the increase of thickness, and the specific energy absorption decreased with the increase of thickness. But, the effect of thickness on densification strain and crushing strength could be neglected. For the optimal design of buffer packaging, to prevent excessive packaging resulting in waste of resources or lack of packaging resulting in the packaged from being damaged, the effects of thickness and density of foam materials on the cushioning and energy absorbing properties should be fully considered, and then the optimal scheme can be selected according to the comparative test results.
作者
孙德强
史英惠
李国志
金强维
李靖靖
胡昕
李耿
SUN De-qiang;SHI Ying-hui;LI Guo-zhi;JIN Qiang-wei;LI Jing-jing;HU Xin;LI Geng(Shaanxi University of Science ＆ Technology,Xi＇an 710021,China)
出处
《包装工程》
CAS
北大核心
2018年第23期75-80,共6页
Packaging Engineering
基金
国家自然科学基金(51575327)
陕西省教育厅重点实验室及基地项目(16JS014)
陕西省教育厅2014陕西本科高校专业综合改革试点子项目(陕教高[2014]16号)
关键词
发泡聚丙烯
静态压缩
厚度
密度
expanded polypropylene foam
static compression
thickness
density
