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Plastics Application Notes

Early Warning of Defects in Blown Film - Application Note (EN)EARLY WARNING OF DEFECTS IN BLOWN FILM

Avoid compromising the blown film extrusion process. This critical stage of upstream production defines the composition of plastic film, whether you’re making a sturdy shopping bag or a crystal-clear electronic display. But achieving thin, flexible, and durable film is complex, and it’s easy for defects to creep in as air inflates the plastic like a balloon. Tearing and warping can cost you more than just wasted material. It can ultimately disrupt production time, increase operational costs, and risk your customer relationships. Temperature measurement is key to getting it right. To optimise a film’s thickness, optical quality, and mechanical strength, you need to better track the cooling rate from the die to the frost point, where the plastic solidifies.

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