Package Design Guide
STEP ONE: Determine Product FragilityThe first step toward determining the amount of cushioning a product requires is to determine the amount of mechanical shock the product can survive on its own. There are several common terms for this, with "fragility" and "g-factor" being the most common. Fragility is normally expressed in units of "g’s" and indicates the maximum deceleration the product can withstand without being damaged. The more fragile a product is, the lower its g-factor. The table below helps to illustrate this concept.
Ideally, the fragility of a product is determined by subjecting it to a series of gradually more severe shocks (decelerations) in order to find the lowest severity impact that will damage the product. The highest deceleration, which did not cause damage, is then known to be the product’s g-factor. It may be necessary to determine fragility levels for a product in various orientations, as it is not uncommon for a product to exhibit greater strength in one direction than another. Even very similar models should be tested individually as it’s seldom that fragility for one model may be safely assumed from another. There is no substitute for fragility test data. Educated guesses as
to a product’s fragility are often counterproductive to the design
process. If the g-factor is estimated too high, and the product is unable
to survive as much shock as anticipated, the packaging will be underdesigned
and significant shipping damage is likely to occur. On the other hand,
if the g-factor is estimated too low, and the product can actually withstand
more shock than anticipated, the packaging will be overdesigned and
unnecessarily expensive. |
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