February 2010 PFFC

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Measurement technique improves metallized PP

Metallized polypropylene films continue to improve, thanks in part to advancements in noncontact, quantitative surface measurement techniques. In the snack food industry today, metallized polypropylene is generally accepted as a replacement for metallized polyester as the barrier sheet of choice for light, moisture and oxygen. Metallized polyester is still in use, but it is generally more expensive and is used primarily for applications requiring long shelf life. Metallized PP did not attain its present-day prominence easily. Early versions of this critical packaging lamination component were plagued by problems with crazing, cracking, pin-windows, poor metal adhesion, lamination bond, etc.

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