Most modern shrink wrap systems utilize some type of a heat tunnel. The heat is used to shrink film, either PVC or Polyolefin, for the packaging of DVDs, CDs, boxes, packages and more. A heat tunnel is the fastest way to complete the shrink wrap process, usually taking less than 5 seconds per item. This time is faster with many higher-end machines. The old way of shrinking film was by using a heat gun, which is still popular for low volume applications.
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