Cushioning material, packing material, and package

Abstract

A cushioning material includes cushioning sheets stacked on top of another and configured to reduce an external force acting on an electrical device. The cushioning sheets include a first cushioning sheet that is positioned to intersect a direction of the external force acting on the electrical device and a second cushioning sheet that has a higher strength in the direction of the external force acting on the electrical device than the first cushioning sheet and is positioned to intersect the direction of the external force acting on the electrical device.

What is claimed is: 
     
         1 . A cushioning material comprising cushioning structures stacked on top of another and configured to reduce an external force acting on an electrical device, wherein
 the cushioning structures include a first cushioning structure that is positioned to intersect a direction of the external force acting on the electrical device and a second cushioning structure that has a higher strength in the direction of the external force acting on the electrical device than the first cushioning structure and is positioned to intersect the direction of the external force acting on the electrical device.   
     
     
         2 . The cushioning material according to  claim 1 , wherein the first cushioning structure includes a first unit member positioned to intersect the direction of the external force acting on the electrical device,
 the second cushioning structure includes the first unit member and a second unit member positioned in the same layer as the first unit member and positioned to intersect the direction of the external force acting on the electrical device, and   when the cushioning material is viewed in plan view in the direction of the external force acting on the electrical device, the first unit member has a larger area than the second unit member.   
     
     
         3 . The cushioning material according to  claim 1 , wherein, in a graph having a vertical axis indicating the external force acting on the electrical device and a horizontal axis indicating time elapsed from when the external force starts acting on the electrical device, a waveform indicating the external force acting on the electrical device is a half-sine shock pulse. 
     
     
         4 . A package material comprising the cushioning material according to  claim 1 , and a packing box holding an electrical device. 
     
     
         5 . A package comprising the cushioning material according to  claim 1 , an electrical device, and a packing box holding the electrical device.