The hottest edible packaging material, the star of

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Edible packaging materials star of future environmental protection materials

edible packaging materials refer to the special packaging materials that can be transformed into an animal or human edible raw material when the function of packaging is realized, which can realize the functional transformation of packaging materials. Edible packaging material is a kind of waste free packaging, which is a resource-based and environment-friendly packaging material. It is one of the key points of the development of packaging materials

edible packaging materials can be traced back hundreds of years. As far back as the Han Dynasty in China, when Zhenghe went to the west, beeswax was used to encapsulate fruits, so that fruits could be stored and preserved under the influence of different environments and climates for a long time. In modern times, glutinous rice powder was made into a film for anti stick inner packaging of sweets

types of edible packaging materials

types of edible packaging materials can be generally divided into five categories at present

no matter what type of edible packaging materials, they can only be defined by a certain main raw material or component. It is difficult to classify them with completely pure and single materials, so edible packaging materials are classified by their main raw materials (components)

1. Edible starch packaging materials

edible starch packaging materials are made from starch as the main raw material. When making, the starch forming agent and adhesive are configured in a certain proportion, and then fully stirred, and then processed by casting or hot pressing to produce a packaging film or a packaging container with a certain rigidity

the starches used in this kind of edible packaging materials include corn, sweet potato, potato, konjak, wheat and other starches. The added adhesives are mostly natural non-toxic vegetable glue or animal glue, such as gelatin, agar, natural resin glue, etc

2. Protein edible packaging materials

protein edible packaging materials are packaging materials based on protein, using the colloidal properties of protein and adding other additives to change the hydrophilicity of its colloid

protein edible packaging materials are mostly packaging films. Protein development new 6000 series and 5000 series aluminum alloy sheet industrialization preparation technology research. Based on the different sources of protein, protein packaging films can be divided into collagen films, milk based protein films and grain protein films

3. Polysaccharide edible packaging materials

polysaccharide edible packaging materials are mainly made of polysaccharide food raw materials based on the gel effect of food polysaccharides

polysaccharide edible packaging materials can be generally divided into cellulose film, chitosan film, pullulan thin film according to their different base materials. By the end of 2020, China's non-ferrous metal industry has entered the ranks of world powers, film and hydrolyzed starch film

4. Fat edible packaging materials

fat edible packaging materials are packaging materials made from the compactness of adipose tissue fibers in food. According to different sources of fat, it can be divided into three kinds of fat packaging materials: vegetable oil type film, animal fat type film and wax type film

5. Composite edible packaging materials

composite edible packaging materials are packaging materials made by using a variety of substrate combinations for forming shrinkage and different processing technologies. Its base materials include the base materials used in the above four types of edible packaging materials, such as starch, protein, polysaccharide, fat materials and their necessary additives

in addition to the above five types of edible packaging materials, there are also some other types of edible packaging materials, such as expanded (foaming) food packaging materials

problems faced by edible packaging materials

edible materials, as a branch of new materials, inevitably face many problems:

(1) performance needs to be improved. Whether it is the processing and molding of packaging containers, the performance of the packaging products obtained from edible packaging is far from that of paper, plastic and other packaging products, and needs to be further improved

(2) the cost needs to be reduced. The research and production of edible packaging are in an immature stage and have not yet formed economies of scale, which makes the cost of

relatively high. In order to face the market, the cost needs to be reduced

(3) the process needs to be improved. The relevant manufacturing process of edible packaging is not very mature, and the technical parameters are not very stable, which needs to be further improved

(4) the application needs to be explored. Edible packaging is not a universal packaging. It remains to be explored and tested which food packaging should be used, which occasions and which storage and transportation conditions can be used

(5) varieties need to be further developed. At present, edible packaging can not meet the market demand. There are mainly many problems in varieties, such as more films and fewer containers, more soft materials and less hard materials, more natural products and less processing, more rough products and less refined products, which need to be solved

processing and characteristics of main edible packaging materials

edible packaging materials are relatively hot topics in the research of packaging materials at present. With regard to edible packaging, new varieties and technologies continue to appear. Now, the processing methods and characteristics of edible packaging materials that have been studied or are being studied and developed are briefly analyzed

(I) processing and characteristics of edible packaging materials of soybean protein

edible packaging materials of soybean protein are mainly studied in films at present. It mainly uses the protein extracted from soybeans, adds plasticizers and film-forming agents that are harmless to human beings or animals such as glycerol and sorbitol, and then makes edible packaging materials similar to plastic by casting and other methods

it is widely used as an edible packaging material for low precision soy protein -- the packaging film has good packaging characteristics, such as good moisture resistance, good elasticity and toughness, and high strength. At the same time, it has certain antibacterial and disinfection ability, which is effective in protecting water, preventing oxygen infiltration, and preventing the oxidation of packaged food. Therefore, this kind of edible packaging film is used for food packaging, especially oily food with high fat, which can maintain the original taste of food and is an ideal oily food packaging material

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