According to a Chicago-based market research group, snacking in America is at an all time high at 20 percent of in home and away from home meals. Morning snacking is increasing the fastest and the market has responded with snack sized packages of dried fruits, nuts, granolas, and gummies. At Multifilm, we can advise you on the best films for the correct applications that will optimize your packaging materials to yield the best results.
Many popular snacks are made with sensitive materials that require high gas barrier, high oxygen barrier, or both. Gas barrier is measured in oxygen transmission rate (OTR) or how much oxygen will pass through a film over a given period of time. Gas barrier is important to have for snacks that contain fats, oils, meats, and dried fruits, and is also required when a nitrogen flush is applied to extend shelf life. Water is a vital element in almost every snack since flavors are carried by moisture. Moisture vapor transmission rate (MVTR or also called WVTR) measures how much water will pass through a film in a given period of time.
Clear barrier films like SiOx, AlOx, and PVdC offer decent barrier, but are expensive. Nano coating is also pricey and only offers gas barrier. The least expensive method to achieve optimum barrier, both gas barrier and water barrier, is metallization. Metallization is the process of adding a thin layer of aluminum to a plastic film in order to add barrier or optics to a package, or both. Since we have a metallizer in house at Multifilm, the cost of adding the metallization process to the film is less significant than adding metallized film as a separate bought film. The deposited layer of vaporized metal is also so little that it will not set off most metal detectors.