I-bar shrink wrap machines are primarily designed for low to mid-volume jobs. Impulse sealers emit fewer odors and do not burn the edges. Shrink wrap packaging is used for packaging software boxes, DVDs, soap, chocolates and more. The shrinking process usually takes a couple of minutes as the operator moves the product and shrinks all sides. PVC shrink film is typically used for the packaging of boxes, CDs and DVDs.

I-bar shrink wrap machines require little maintenance. This means they include a few replacement parts, a starter roll of shrink film and a heat gun. PVC film cannot be used with food. Typically a total of three passes of the bar are needed to completely encapsulate a square-shaped object. Polyolefin film is also more pliable than PVC film. Both types of film are clear. Poly film emits fewer odors than PVC and is recommended over PVC for use in rooms with poor ventilation. Impulse sealers use pulses of electricity to cut through film. The shrinking process can be sped up by use of a heat tunnel, which applies heat evenly to all sides of a product at once.

This is were I-bar machines and sealers come into play. I-bar sealers use a single bar to seal film around a package, hence the "I" in I-bar. Article Source: http://EzineArticles. A Packaging Film Manufacturers heat gun is similar to a hair dryer, but emits much more heat. I-bar shrink wrap machines can be used with the two most common types of shrink wrap film, this being PVC and Polyolefin (Poly). The cutting wire does need to be cleaned and changed on occasion.Shrink wrap is a great way to package, protect and preserve products. Both types of sealers operate at about the same speed. Once a product has been sealed in film, a heat gun is used to tightly shrink the film. They are affordable, but cannot be used for high-volume packaging. Many shrink wrap machines come in a system. The wire, pad and Teflon tape can be changed quickly and do not require any special skills to do. I-bar machines are usually available with heat or impulse sealing