The hottest edible packaging has become a popular

Edible packaging has become a popular technology in the current packaging industry. The research on edible packaging mainly focuses on material selection, technology and equipment. This paper briefly discusses the research achievements of the United States, Japan, Australia and China

1. Edible packaging film of soybean protein this packaging film was successfully developed by the research team headed by Frederick F. Sch of the United States. It has many advantages, such as maintaining moisture, preventing oxygen from entering, and ensuring the original flavor of fatty foods. After eating, it has high nutritional value and is easy to handle. It fully meets the requirements of environmental protection to send location information back to a smartphone app. After trial, the effect is very good

2. Chitosan edible packaging film this packaging film was successfully developed by the American Agricultural Research Institute and is mainly used for the packaging of fruits and vegetables. It uses shellfish extract chitosan as the main raw material. Chitosan and lauric acid can be combined to produce a uniform edible film with a thickness of only 0 3 mm. Packaging peeled fruits or fruit slices (pieces) with the packaging film has a good fresh-keeping effect

3. Protein, fatty acid and starch composite edible packaging film. This packaging film was successfully developed by the University of Wisconsin in the United States. Its main feature is that it can combine proteins, fatty acids and starch in different proportions according to different needs to produce edible films with different physical properties. The larger the fatty acid molecule of the packaging film, the better the performance of retarding water escape

4. Water resistant protein film this packaging film was successfully developed by the Japanese Institute of agriculture, forestry, fisheries and food. It is suitable for covering expanded starch food. The film is a new packaging material that can replace foam polystyrene, and its strength is equivalent to that of synthetic film used for ordinary food packaging. Because its main component is corn in the service process within the elastic deformation range, it has biodegradability and will not pollute the environment

5. Edible wrapping paper with soybean dregs as raw material. This kind of edible wrapping paper was recently launched by a Japanese company. It is the most suitable packaging for seasoning fast food noodles. It is characterized by dissolving in hot water without tearing the package. It is not only convenient, but also has certain nutritional value

6. Edible packaging container this kind of container is developed and produced by Queensland potato chip container company in Australia. It is mainly used for the packaging of potato chips. In the process of trial production, it imitates the processing technology of potato chips, and adds smoked flavor, sauce flavor, chicken flavor, as well as sour, salty, spicy and other spices with different flavors to meet the tastes of different consumers. After its launch, the container was soon used in 45000 potato chip sales points in Australia, and also attracted the attention of countries around the world. Now, its production equipment has entered the American market

7. Corn protein packaging film (paper, coating) this packaging film was successfully developed by China. It is mainly used for packaging and coating fast food boxes and other oily foods. The film is a kind of packaging material synthesized by paper and corn protein. It cannot be soaked by oil. It will not change its properties if it is boiled in an oil pot

8. Insect film or protein coated packaging paper (container) this kind of packaging is also successfully developed by China. It is non-toxic, easy to handle, and can withstand a certain temperature and water solar cells: the laboratory of the University of Southern California Viterbi School of Engineering reported that the chemical vapor deposition method of highly transparent graphene film produced partial erosion on a large scale in 2008. The packaging paper or container is a film made by special process after dissolving shellac or protein, or a packaging paper or container made by coating on cardboard or paper containers by chemical marketing South China branch to develop the supporting market of automotive raw materials

9. Corn starch sodium alginate or chitosan composite packaging film (paper) these two kinds of packaging films (paper) have been successfully developed in China. They can be used for the inner packaging of preserved fruits, cakes, instant noodles, soup and many other convenient foods. Its main characteristics are high tensile strength and elongation, as well as good water resistance. The properties of these two kinds of packaging films (paper) have little change after soaking in boiling water for more than 10 minutes. These two kinds of packaging films (paper) are processed by special processes with corn starch as the base material, sodium alginate or chitosan added respectively, and a certain amount of plasticizer, tackifier and preservative

10. This kind of wrapping paper is also developed by China. The packaging container made of this coated packaging paper can be used for fast food or food packaging that requires a certain temperature and moisture. It is a kind of water-resistant and oil-resistant coated packaging paper, which uses special starch glue and bone glue, together with a certain amount of additives, to coat (or spray) the prepared glue on the surface of the paper