Description

The bubbles that provide the cushioning for fragile or sensitive objects are generally available in different sizes, depending on the size of the object being packed, as well as the level of cushioning protection needed. Multiple layers may be needed to provide shock and vibration isolation, while a single layer may simply be used as a surface protective layer. Bubble wrap is also used to form some types of mailing envelopes. Bubble wrap is most often formed from polyethylene (low-density polyethylene) film with a shaped side bonded to a flat side to form air bubbles. Some types of bubble wrap have a lower permeation barrier film to allow longer useful life and resistance to loss of air in vacuums.