基于发泡聚苯乙烯的缓冲曲线快速获取方法研究  

Method for Fast Acquiring of Buffer Curve Based on Expanded Polystyrene

作　　者：李志强 牛文倩 马淑芳 LI Zhiqiang;NIU Wenqian;MA Shufang(College of Bioresources Chemical&Materials Engineering,Shaanxi University of Science&Technology,Xi'an 710021,China;National Experimental Teaching Demonstration Center for Light Chemistry Engineering,Shaanxi University of Science&Technology,Xi'an 710021,China;Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering,Taiyuan 030000,China)

机构地区：[1]陕西科技大学轻工科学与工程学院,西安710021 [2]陕西科技大学轻化工程国家级实验教学示范中心,西安710021 [3]山西浙大新材料与化工研究院,太原030000

出　　处：《包装工程》2025年第5期228-234,共7页Packaging Engineering

基　　金：山西浙大新材料与化工研究院项目(2021SX-AT007)。

摘　　要：目的回顾传统获取缓冲曲线的理论、实践和简化方法,与利用能量密度和应力能量2种方法预测及实践得出的缓冲曲线进行误差对比分析,应用最简便的方法得到发泡聚苯乙烯(EPS)缓冲曲线。方法依据《包装缓冲材料:测试项目、动态压缩试验和静态压缩试验》(GB/T 8167—2008)中动态压缩缓冲包装材料试验方法的要求,利用密度为20、25 kg/m3,跌落高度为250、350、460、760 mm,厚度为25、30、35、65 mm的EPS材料,通过试验测得该曲线上不少于5个点的数据并由此绘制完整曲线。基于能量守恒原理,分别求出该缓冲材料下的应力能量-静应力曲线、能量密度-静应力曲线等相应的缓冲曲线,并进行绘制。在此基础上建立缓冲材料的静应力、动应力和单位体积吸收能量对应的关系式,预测缓冲材料最大冲击加速度,从而得到快速获取缓冲曲线的方法。预测不同组合条件下的EPS缓冲曲线,并将其与试验所得缓冲曲线进行对比分析。结果选择不同组合下的跌落高度和材料厚度预测缓冲曲线,所得结果与试验缓冲曲线较为吻合。结论这2种推导方法均可快速获取缓冲曲线,大幅降低试验次数,也为快速得到缓冲曲线提供了更多可能。The work aims to review the theories,practices and simplified methods for obtaining the buffering curve traditionally,and conduct an error comparison analysis with the buffering curves predicted and obtained through the two methods of energy density and stress energy,so as to obtain the buffering curve of expanded polystyrene(EPS)by the most convenient method.According to the requirements of the dynamic compression test method for packaging buffering materials in"Packaging Buffering Materials:Test Items,Dynamic Compression Test and Static Compression Test"(GB/T 8167-2008),EPS samples with densities of 20 and 25 kg/m³,drop heights of 250,350,460 and 760 mm,and material thicknesses of 25,30,35 and 65 mm were used.At least five data points on the curve were measured through experiments and the complete curve was drawn.Based on the principle of energy conservation,the stress energy-static stress curve,energy density-static stress curve and other corresponding buffering curves under this buffering material were calculated and drawn respectively. On this basis, the relationship formulas between the static stress, dynamic stress and unit volume absorbed energy of the buffering material were established to predict the maximum impact acceleration of the buffering material, thereby obtaining a method for fast obtaining of buffering curves. The buffering curves of EPS under different combination conditions were predicted and compared with the buffering curves obtained through experiments. The results showed that the predicted buffering curves under different combinations of drop height and material thickness were in good agreement with the experimental buffering curves. In conclusion, both of these two derivation methods can quickly obtain the buffering curve, significantly reducing the number of experiments, and also providing more possibilities for quickly obtaining the buffering curve.

关 键 词：EPS 应力能量 能量密度 缓冲曲线 

分 类 号：TB485.1[一般工业技术—包装工程]