Research On The Cushioning Mechanism And Dynamic Cushioning Property Of The Honeycomb Paperboard

Honeycomb paperboard is a kind of environmental-friendly packagematerial with the regular hexagonal structure. It is widely used owing toits characteristics of environment-friendly, novel structure, low cost, goodelasticity and cushioning property.There are several problems in the applications of honeycombpaperboard, such as low edgewise compressive properties, poor initialcushioning property and difficulty in being used as folding carton. In orderto solve this problem, a kind of quasi-rhombic honeycomb paperboard isused to improve its cushioning property in this paper.Based on the energy dissipation mechanism of honeycombpaperboard, the cushioning effect of closed air in the honeycomb cell isdiscussed in this paper. The cushioning properties of the slotted andunslotted honeycomb core are compared and analyzed by staticcompression test, and the result shows that if the closed air in thehoneycomb cell is destroyed, the elastic-plastic stress of honeycombpaperboard will decrease.In order to discuss the relationship between the honeycomb core’sstructure and the paperboard’s static cushioning property, eigen bucklingof quasi-rhombic and hexagonal honeycomb with single honeycomb coreis analyzed by using FEA software ANSYS, then the simulated andexperimental results are analyzed comparatively. The results show that ifthe equivalent density is same, the critical buckling load of quasi-rhombichoneycomb core is less than that of hexagonal honeycomb core, both thesimulated and experimental results are fit for this conclusion; as the singlelayer wallboard’s length of quasi-rhombic honeycomb core decreases, thesimulated and experimental critical buckling load become large; theexperimental stress-strain curve of honeycomb paperboard shows thatwhen the equivalent density is same, the stress of quasi-rhombichoneycomb paperboard in various stages is less than that of hexagonalhoneycomb paperboard; when honeycomb core is quasi-rhombic, thestress of quasi-rhombic honeycomb paperboard in various stages becomeslarger with the single layer wallboard’s length of honeycomb core decreases.After the feasibility of the quasi-rhombic honeycomb structure beingproved, the dynamic cushioning properties of quasi-rhombic andhexagonal honeycomb paperboard is further investigated by the dynamiccompression test for cushioning materials, and the experienced formula ofdynamic cushioning curves is obtained, then the relationship among thedrop height of hammer, the paperboard’s thickness and the size ofhoneycomb core how to influence on the dynamic cushioning properties ofpaperboard is analyzed. The results show that the dynamic cushioningproperty of quasi-rhombic honeycomb paperboard is better than that ofhexagonal honeycomb paperboard when the consumables and conditionsare same.According to the results of dynamic compression test, in this paperthe dynamic cushioning properties of quasi-rhombic honeycombpaperboard with three different size is further investigated and thedynamic cushioning curves and its experienced formula is obtained.However, the dynamic cushioning curves of quasi-rhombic honeycombpaperboard can’t express its capability of energy absorption clearly.Therefore, dynamic compression energy absorption diagram ofquasi-rhombic honeycomb paperboard is constructed by experiencedformula and less experimental datas in this paper. The results show thatdynamic compression energy absorption diagram can express the energyabsorption and corresponding stress.The research achievement in this paper will be used as a foundationof deeper researching and application of honeycomb paperboardpackaging material.