Biscuits are one of the foods that can be seen everywhere in our lives, with many types. As biscuit packaging that attracts consumers' attention, there are mainly the following categories:
(1) Single-layer heat shrinkable film cake packaging (i.e. wrapped packaging):
It can wrap tough biscuits that are not easily brittle, have a large area and are regular. The heat shrinkable film can be used to tightly freeze multiple biscuits together so that the biscuits are not easy to scatter or break. Because the heat shrinkable film used in this type of product has average barrier properties, the shelf life of the cakes is short.
Such as plastic composite film packaging, aluminized composite film composed of aluminized film and plastic film, aluminum-plastic composite film composed of aluminum foil and plastic film, etc. Aluminum-plastic composite films are relatively rarely used, and the barrier properties of composite films are relatively low. High, generally there are the following packaging methods:
Inflatable packaging fills the package with nitrogen, which not only prevents the biscuits from oxidizing and deteriorating, but also prevents the biscuits from being crushed. This type of packaging usually requires the packaging bag to have higher barrier properties (i.e., lower gas permeability), that is, The permeability of nitrogen, oxygen and other gases is low, otherwise the nitrogen concentration in the package will be reduced, and the quality preservation effect of nitrogen-filled packaging will be reduced. The inner lining is packed in trays - in order to prevent the packaged biscuits from being crushed, the biscuits are usually placed in on plastic pallets, and then packaged in packaging bags. Desiccant bags are often placed in such packaging.
(3) Ordinary packaging or ordinary air-filled packaging, packaging bags are directly packaged or filled with a certain amount of air before packaging, which can prevent the cake workers from being crushed. This type of packaging usually requires low barrier properties of the packaging bags (that is, high gas permeability) .
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