Bubble wrap is a
pliable transparent plastic material
used for packing fragile items. Regularly spaced, protruding air-filled
hemispheres (bubbles) provide cushioning for fragile items. 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 that is needed. Multiple layers might be needed to
provide shock and vibration isolation.
A single layer might be used just as a surface protective layer. Bubble wrap is
used to form some types of mailing envelopes.
Bubble wrap is most often formed from polyethylene (LDPE) 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.