Unit_2_-_Basic_Packaging_Functions (3)

Unit_2_Basic_Packa - microwavable and ovenable bags for vegetables and meats Pharmaceuticals and drug-coated medical devices can also be

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2.2.4 Temperature Temperature can have severe effects on products and packages. There are a multitude of products in the freezer aisle that need to remain frozen or they will melt. There are also products that cannot tolerate cold such as paint, caulk, and adhesives. And I’m sure we’ve all fallen victim to what happens when we put a drink in the freezer and forget about it! Heat can also damage products by melting them (chocolate) or promoting faster spoilage, such as with produce; high temperatures increase the rates of respiration and reduce shelf life. Products that are temperature sensitive need packages that are compatible with those temperature extremes. Some materials, like plastics, become very brittle in cold temperatures and can break or crack. Others, especially plastics, can soften or melt in hot temperatures. There are also plastics which have been developed to be used to cook in, such as with
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Unformatted text preview: microwavable and ovenable bags for vegetables and meats. Pharmaceuticals and drug-coated medical devices can also be temperature sensitive and are shipped in containers with frozen gel 2.2.3 Carbonation Carbonation is a gas that we want the package to preserve in the product. The loss of fizz from pop, beer, wine, and sparkling water and juices is an undesirable effect. Here, packaging materials need to be chosen that are high carbon dioxide barriers. Glass and metal are the best barriers to both gasses and moisture. Plastics do not perform as gas barriers as strongly as glass and metal do, but they are effective; they just have shorter shelf lives. It is also notable that when beverage manufacturers shifted from glass to plastic bottles, they also had to adjust their distribution practices so that the product sold prior to its loss of CO 2 . Modified atmosphere beef packaging...
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This note was uploaded on 03/02/2012 for the course PKG 101 taught by Professor Haroldhughes during the Spring '08 term at Michigan State University.

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