Properly Protecting Products During Transport
You might be shocked, but you will find a great many people who have no concept of how to shrink wrap their packages correctly. Unusual as it may seem, understanding how shrink wrap is best utilized to offer the most optimal product safety possible begins with understanding how shrink wrap is produced, and how it protects products throughout shipping.
Shrink film can either shrink in one direction or in two directions – these are generally known as either unidirectional or bidirectional shrink characteristics. Shrink traits are established when the product is produced, and also are established by how the film is aligned when it’s at first heated, and the “memory” of the material will always attempt to revert to this original heated state.
What this also means is that shrink wrap may be re-heated, and therefore re-aligned to favor, or “remember”, a new shape. This is often carried out at the industrial level by heat guns, that are pieces of hand held gear that heat shrink wrap for re-alignment, or for larger operations, with shrink tunnels, that are large, enclosed devices that heat an entire package thoroughly, re-aligning the shrink wrap inside.
Now that we comprehend how it is produced, let us have a glimpse at the two primary types of shrink wrap used for securing packages. Flat rollstock is the conventional, hand-applied form of shrink wrap utilized by numerous smaller sized operations, usually sealed with some kind of heat supply or medium strength epoxy. Center-folded shrink wrap is really a little bit different, and is usually rolled folded into halves.
By putting the product or package in the center of the fold, and pulling up the corners to form something that looks a little like a plastic bag, the entire arrangement can then be heated to re-align the stretch wrap, creating a secure and perfectly sealed package. Truthfully, most people who don’t know how to shrink wrap are most likely dealing with center-folded stock and simply have no concept of how to utilize it properly.
David Newberry is a specialist on wholesale packaging supplies and contributor to PackagingSpot.com. He often shares his insights on subjects like shrink wrap packaging online.
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