Abstract
Good barrier packing is particularly important for foods and keeps a suitable atmosphere inside the packages that is condusive to the preservation of the nutrients in food and extend storage time. The development of new technologies has greatly promoted the fabrication of thin film with a certain barrier property and optimizes the internal atmosphere of packages. This chapter focuses on the enhancement of barrier performance of nondegradable and biodegradable plastics as well as their fabrication and application in food packaging. The fabrication techniques include the orientation, coating, nanocompositing, blending, and layer-by-layer (LBL) assemply of nanoparticles based on synthetic and biobased polymers. The major emphasis is on the enhancement of barrier properties to guard against oxygen, carbon dioxide, and water vapor, which is key for food packaging plastics. The fabrication of new high barrier plastics will also be discussed, especially the development and potential application of new biodegradable materials in the food packaging industry.
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