The hottest food packaging materials show an edibl

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Food is the second largest biomass source packaging material on the earth after plant fiber, showing an edible development trend

at present, people in the packaging industry at home and abroad focus on the development of plastic packaging film and edible food packaging in the field of food packaging

development of plastic film: it originated in the 1940s in foreign economically developed countries. After more than half a century of hard work, carbon fiber composites have made obvious efforts to take advantage of automotive advantages, and plastic film has become a major category in the processing industry. The film used for food packaging is more likely to catch up from behind. Since the late 1960s, the development of plastic films has gradually accelerated, and new varieties continue to appear, such as shrinking films, frozen packaging films, cooking bags, sterile packaging materials, fruit and vegetable fresh-keeping films, self-adhesive fresh-keeping films, single (double) tensile films, extrusion foaming, kink films, etc

with the continuous development of new products, the development momentum of food packaging is more and more fierce. For example, the biaxial tensile film has replaced the traditional transparent film. Let me briefly tell you the matters that should be paid attention to in the operation of the tensile testing machine: clear packaging material -- cellophane, which is widely used in fast food, biscuits, candy; Thin film has replaced kraft paper as a potential flexible packaging material; Fruit and vegetable fresh-keeping film has the advantages of transparency, cold resistance, and can prolong the storage period. It plays an important role in extending the fresh-keeping period of fruits and vegetables, improving market supply and earning foreign exchange through export; Composite film is a leader in food packaging. At present, there are 500 varieties of composite films in the world. Some of them can be made into cooking bags, which can withstand cooking and baking at 135 ℃, and some can be frozen at ultra-low temperature of minus 23 ℃ - 4O ℃. They have protective functions such as blocking oxygen, carbon dioxide, moisture resistance, shading, and have sufficient mechanical and physical properties such as tensile resistance, deflection, tearing, puncture, impact, etc. the storage period of packaged food can reach more than several years. It has the advantages that cans do not have: first, the packaging is thin, which can shorten the disinfection time; The food does not change color and has less nutritional loss. It can maintain the color, aroma and taste of food. It is suitable for the packaging of original dishes, seafood, fast food, etc. the storage period is equivalent to that of tinplate cans, and the quality is stable, so it does not need to be refrigerated. Second, it is light in weight, with 1000 pieces of 13 specifications × The 16cm cooking bag weighs only 5.5k G. Small size, easy to carry, easy to eat, safe and hygienic, suitable for military, tourism, etc. Third, energy conservation and material saving, which can save a lot of energy in the process of material production, sterilization, disinfection, transportation and storage

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