Packaging compatibility with food product

The suitability of product packaging minimizes undesirable changes, increasing food stability. However, depending on the time of productpackaging contact, there will be interactions (except for glass containers, which do not interact with food). The packaging s compatibility with food reduces interactions, but does not avoid them totally. 

PHB finds numerous applications in packaging. It can be used to prepare films or molded objects. They are compatible with various food products like bever es, dairy, meat etc. So far, the large-scale application of PHB as packaging material is hampered by their high cost. 

Eihns of EAA are used in skin packaging, adhesive lamination, and flexible packaging of meat, cheese, snack foods, and medical products. Extrusion coating applications of EAA include coated paperboard, aseptic cartons, composite cans, toothpaste tubes, and food packages. The resin is compatible with LD, LED, and HDPE. PDA regulations permit the use of ethylene acid copolymers containing up to 25 percent acrylic acid, and 20 percent methylacrylic acid in direct food applications. 

Our studies of the absorption, permeation, and extraction properties of containers produced from high nitrile barrier resins have demonstrated that they meet or surpass the basic criteria established for retention of taste and odor characteristics of carbonated soft drinks. Sensory tests, which can isolate and identify end results as well as integrate collective effects, have confirmed this judgement and have established the general compatibility of these containers with a variety of beverage products from a taste and odor standpoint. Furthermore, these materials have the excellent physical properties required for containers which will find wide use in food and beverage packaging. 

Ethylene vinyl acetate (EVA) is a copolymer of polyethylene. It is similar in chemistry to PE,but it has some percentage of vinyl acetate (VA) included along the chains (Fig. 1.8). The amount of VA that is included, generally between about 5 and 20%, depends on the desired properties of the polymer. VA adds polarity, or adhesion, to the polymer and, so, improves the compatibility of the polymer with fillers and gives the polymer adhesive properties. Most blown film applications using EVA do so as layers in coextruded products, such as food and electronics packaging. 

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