Cushion Material Test by Dynamic Compression Tester

You also need to know about the charactaristic data of cushion material, when you design the package.
This data is often given from cushion material company, but if there are no data, you can obtain it by cushion tester.

This test is held in order to perform dymamic compression to blockish cushion materials.
In concrete terms, we can measure the acceleration and displacement of the weight by dropping the test weight to the top surface of the material.
Then so, from these test parameters, we can find the cushion material charactaristics as "Cushion curve" from these tested parameter.

If the cushin curve and product fragirity as critical acceleration is recognized beforehand, cushion effect of designed package freight will be optimized.

K.Kawaguchi

Shock Fragility Test by Shock Machine

This test has been carried out to identify the shock fragility charactaristics by the shock machie.

It is very important to know the fragility of packged products to realize the appropriate package design.

If the product has a enough strength shock resistance, fewer cushion materials will be required to design package.

Here, the strength of product is represented as "Damege Boundary Curve" that is constructed by critical acceleration and critical velocity change.

These values are decided by shock fragility test.

"Critical velocity change" represent the resistance to free fall.

"Critical acceleration" value is used to cushioning package design.
All the packages are designed under this value when the drop test is performed.

K.Kawaguchi