Shrink Wrap & Stretch Wrap

Stretch wrap and shrink wrap, two packaging materials that are commonly used but often confused. We find many folks will use the term “shrink wrap” when they’re actually referring to stretch wrap. Some confusion is understandable since, at first glance, they may seem somewhat similar (the fact they both start with the letter “S” probably doesn’t help either). While they may appear similar, they’re not interchangeable they’re made from different materials, applied in different ways and best suited for quite different applications.

Clear shrink film is typically made from cross-linked polyolefin resin and has a slightly stiff feel to it. Stretch film is made from polyethylene resin, often combined with additives to produce desirable characteristics like puncture resistance and surface tack. Polyethylene stretch film is much more flexible and elastic.

Shrink film and stretch film both rely on tension to contain & unitize goods. How that tension is created is the most recognizable difference between the two. With shrink film, tension is created through the application of heat. High heat literally causes the plastic molecules to shrink and shorten, pulling the film tight around the package. Stretch film requires no heat. It is manually or mechanically stretched (up to 300%) then wrapped around a load. The stretching process elongates the plastic molecules in the film like tiny springs. After being stretched the film wants to return to its original length. The tension created by the “film recovery” secures the load.

Stretch film is the most common method of securing items to pallets for shipment because it’s easy to apply, economical and effective. Shrink film is somewhat more difficult to apply (even basic shrink wrap applications require equipment for sealing and heat-shrinking). Shrink wrap has a very clean and professional appearance which makes it ideal for packaging things that face the consumer in a retail environment.

Have a new or existing packaging application that you’d like to discuss? We can work with you to test and develop effective stretch or shrink wrap solutions suited for your specific application. Give us a call at (800) 665-4040 or (905) 507-4040.

Packaging Equipment Leasing

In previous PPI newsletters we have written about some of the advantages of equipment leasing. We continue to believe that in the right situation leasing can provide for the installation of new, more productive and safer equipment which will reduce costs through higher productivity, lower maintenance and improved worker safety. If you are using older equipment where repair costs are increasing, productivity is dropping and worker safety is being compromised then a lease may be the answer. We have recently seen a spike in customers and prospects asking about PSR Health and Safety Reviews because of a Ministry push to protect workers from having to use older unsafe equipment. In many cases the cost to upgrade old equipment, to the new standard, is cost prohibitive.

To assist those visiting our revised web site we now have a leasing page where you can enter various equipment amounts and time periods to see what the costs of leasing would be. You will probably find that the lease cost will be less than the monthly savings from leasing new, more productive equipment. The difference will flow right to the bottom line. We encourage you to check out our equipment leasing page.

B1000 Battery Strapping Tool

PPI Introduces the latest member of the B-Series battery operated strapping tools, the B-1000. The B-1000 has all the same great features as the B-400 and B-800 tools but with the ability to pull up to 1125 lbs of tension for those applications that require additional strapping power.

The B-1000 friction-weld battery tool for use with polyester strapping can offer significant benefits and cost savings for your strapping application.

  • Increase productivity, one click of a button and your package is safe and secure.
  • Reduce worker injuries, no more sore backs and cut hands from handling heavy coils of steel strapping.
  • Polyester will not rust, keep your shipments safe from corrosion contamination and present a far superior looking product.
  • Substantial cost savings. Converting to polyester from steel strapping will yield a quick return on your B-1000 investment.

Why should you switch to the B-1000? Call us for a free demo and let us show you all the features and benefits the B-1000 has to offer, (800) 665-4040 or (905) 507-4040

B1000 Battery Strapping Tool