Performance And Experimental Study Of Cushioning Materials

With the continuous expansion of the electronic commerce industry,the requirements of the product protection are also getting higher and higher.The position of foamed polyethylene cushioning material in cushioning packaging is very important.Because the foamed polyethylene cushioning material has good elasticity,it can be reused.It is very important to study the compression properties of foamed polyethylene under static cyclic loading and unloading.At the same time,the dynamic characteristics of the cushioning material can reflect the role of the buffer material in the actual transport process.In the compression process,the acceleration pulse signal is an important feature of the dynamic performance of the cushioning material.In this paper,the cyclic loading and unloading tests were carried out under different strain rate and constant load,and the relationship between the number of cyclic loading and unloading times and the amount of compression,recovery and dissipation energy were studied.And on the basis of studying the static characteristics of polyethylene,For drop hammer impact test on polyethylene foam cushioning materials,using image processing technology to obtain the acceleration pulse signal of foamed polyethylene cushioning material,at the same time,using the acceleration sensor to collect the acceleration pulse signal of the sample.And select the honeycomb paperboard and corrugated structure were tested,and the method of using image test technology to obtain the acceleration signal is verified.Through the analysis of the static cyclic compression test in the laboratory,it is concluded that the strain rate affects the mechanical properties of the material.With the increase of the number of loading,the effect of strain rate on the deformation of the material increases gradually.The greater the load,the greater the amount of the non recovery deformation of the foamed polyethylene buffer material;with the increase of the number of cyclic loading and unloading,the greater the amount of deformation of the foam;and with the increase of the number of cycles,the impact of load size on the amount of deformation of the foam polyethylene buffer material is more obvious,and a positive correlation trend.In order to confirm the feasibility and accuracy of the image measurement system,the measurement of the acceleration pulse signal is obtained,the static compression test and acceleration pulse test were carried out in the laboratory,and the acceleration pulse signals collected by the acceleration acquisition system were analyzed,The result of acceleration acquisition and the results of image acquisition are basically consistent.The results show that in the premise of measurement environment at the same time,the measurement results of the system are basically consistent with the measurement results contrast method,image acquisition and analysis system of the measurement results are accurate,meet the need of buffer material for pulse signal measurement and basic dynamic characteristics.