The number and placement of the holes which let the air escape from a shrinking package is very important in achieving the optimum shrink performance. If the air escapes too early, the film won’t fully shrink and, if the air does not escape in time, the bubble will burn through. [Read more…] about What is Pre-Perforated Film and When Should I Use It
The perfect shrink wrapped package is a combination of correct bag size, amount and placement of perforations as well as the the right heat shrink tunnel machine dynamics for overall air velocity, air direction, temperature and belt speed.
Shrink tunnels are too often overlooked in the buying process as it’s typically seen as a support piece to the shrink wrapper. When you think of package quality and appearance, think of the shrink tunnel as it plays a large role with the end product.
The use of energy is critical for shrink tunnels as the wrapped package must have maximum ballooning or pillowing to allow the bubble to collapse at the right rate. If not done correctly, you will notice imperfections with the shrink wrap resulting in a less than desirable end product not suitable for retail. [Read more…] about Reason Why You Need to Think of the Right Shrink Tunnel