Jul. 29, 2024
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In the s, two brothers named Pat and Bill Lancaster set out to solve a problem. Shipping products meant either loading hundreds of single boxes onto a truck one at a time, or using metal straps or shrink bags to unitize loads. All three options took a lot of time and energy. Loading boxes one at a time was hard work and strapping or shrink bags were expensive. How could they make the process of unitizing better?
The Lancaster brothers would introduce the first stretch wrapper at the Packaging Machinery Manufacturers trade show. They developed a way to unitize pallet loads by wrapping them with layers of plastic film. This was faster and cheaper than other methods.
Four decades later, the stretch wrapper has become the dominant form of pallet unitization. This has saved companies billions of dollars every year by increasing productivity and reducing shipping damage.
The story isnt over, however. This is just the end of the beginning.
The Challenge Ahead
The stretch wrapping quality how well the pallet load is stretch wrapped of the vast majority of pallet loads being shipped today is not as good as it should be or could be.
This results in too many products reaching their destinations in unsalable condition damaging our environment, as too many of them wind up in landfills. It also creates an estimated $60 billion of waste each year in just the consumer products goods, food, and beverage industries alone.
We believe as much as half those unsalable products can be saved just by stretch wrapping better.
The techniques for effective stretch wrapping are well established and disarmingly simple in theory but they can be complicated or difficult to implement in the complex environments of todays factories and warehouses.
Whats Next?
Our goal is to put a big dent the billions of dollars of waste caused by unsalable products by making it easier for our customers to stretch wrap effectively.
Were working hard on developing technology and machines to do just that.
To learn more, visit Lantech.com or if youre going to Pack Expo, come see us at Booth N-.
This post was published on November 3, and updated on January 28, .
Stretch wrap or stretch film, sometimes known as pallet wrap, is a highly stretchable plastic film that is wrapped around items. The elastic recovery keeps the items tightly bound. In contrast, shrink wrap is applied loosely around an item and shrinks tightly with heat. While it is similar to plastic food wrap, it is not usually made of material rated as safe for food contact.
It is frequently used to secure pallet loads to one another but also may be used for bundling smaller items. Types of stretch film include bundling stretch film, hand stretch film, extended core stretch film, machine stretch film and static dissipative film.
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The most common stretch wrap material is linear low-density polyethylene (LLDPE), which is produced by copolymerization of ethylene with alpha-olefins, the most common of which are butene, hexene and octene. The use of higher alpha-olefins (hexene or octene) gives rise to enhanced stretch film characteristics, particularly in respect of elongation at break and puncture resistance. Other types of polyethylene and PVC can also be used. Many films have about 500% stretch at break but are only stretched to about 100300% in use. Once stretched, the elastic recovery is used to keep the load tight.
There are two methods of producing stretch wrap:
Other properties such as break strength, cling, clarity, tear resistance, static discharge, etc. are also important.
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In pallet unitizing, stretch wrap can have several functions:
Making sure boxes stay on the pallet and properly aligned is an important consideration in warehouse distribution, especially as the demands for increased throughput continues to rise.
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An automatic rotary arm wrapper An automatic rotary ring wrapperStretch wrappers are devices used to apply stretch wrap. There are many types of stretch wrappers:
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