Cushioning Properties of Multi-layer Corrugated Sandwich Structures

Multi-layer corrugated sandwich structure is a favorable kind of cushioning and packaging material, but there is little reference to the selection of multi-layer corrugated sandwich structures as a cushioning media. This article analyses the compressive behavior of multi-layer corrugated sandwich structures. During the compression processing, the corrugated sandwiches are gradually squished from top to bottom. Experimental results show the compressive resistances are similar for the same type of corrugated sandwiches with different layers; the energy absorption of the multi-layer corrugated sandwich structures is significantly greater than the monolayer one; and the multi-layer corrugated sandwich structures have compression resistance capability for repetitious shock. Based on the compressive tests of common corrugated sandwich paperboards of B, C, E, BE, CE, and BC types, the relationship between cushioning properties of multi-layer corrugated sandwiches and their relative density was researched. The energy absorption of multi-layer corrugated sandwich structures increases with the relative density. These research results can be used to optimize and design corrugated sandwich pads.