Development of the hottest edible packaging

2022-10-02
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The development of edible packaging

various products and packaging are changing with each passing day. With the development and utilization of new materials, the packaging industry has undergone earth shaking changes. At present, edible packaging has become a new topic of concern

edible packaging is a new type of food packaging technology material that can improve the contradiction between environmental protection of packaging materials with the development of modern food industry and the continuous updating of food packaging. Edible packaging materials developed abroad in recent years generally take protein and starch that can be digested and absorbed by human body as basic raw materials to produce invisible food packaging films that do not affect the flavor of food

edible protein packaging films edible films based on protein mainly include soybean protein isolate film, corn gliadin film, wheat gluten film and whey protein film

the United States uses protein extracted from soybeans to produce plastic like substances as food packaging materials to replace the plastic synthesized from oil in the past. This production technology is to separate the protein after soaking and grinding the soybean, then dry the protein solution to remove the moisture, and then mix this protein powder with other components and additives to make an edible film or coating for food packaging. They only have good strength, elasticity and moisture resistance

starch edible packaging materials are made from starch as the main raw material. When making, the starch molding agent and adhesive are prepared in a certain proportion, then fully stirred, and then processed by hot pressing to produce a packaging film or a packaging container with a certain rigidity. The starch used includes corn, sweet potato, potato, konjak and wheat. The adhesives added are mostly natural non-toxic vegetable glue or animal glue, such as gelatin, agar, natural resin glue, etc

recently, Japan has developed an edible packaging, which uses starch as raw material and adds some other edible substances into the packaging

edible packaging materials are formed by combining, heating, pressurizing, coating, extruding and other methods. The basic materials used in edible packaging materials for different items are different; But they are all defined by some main raw material or component. Therefore, according to the characteristics of the main raw materials used, in addition to the protein and starch materials introduced above, there are polysaccharides, fats, compounds and so on

polysaccharide edible packaging materials are mainly made by using the gel effect of polysaccharide food and taking polysaccharide food raw materials as the base material. Cellulose films can be made from methyl cellulose, hydroxypropyl methyl cellulose and pectin; With aquatic shellfish extract and chitosan film; Pullulan films can be made from the high molecular compound pullulan produced by the fermentation of sweet potato, potato, cassava, grain and other agricultural products; Hydrolyzed starch film can be prepared by using cereal starch paste and water

fat edible packaging materials are packaging materials made from the compactness of adipose tissue fibers in food. According to different sources of fat, several kinds of fat packaging materials such as vegetable oil type film, animal fat type film and wax type film can be prepared respectively. The fat in vegetable oil film can be extracted from cinnamic acid, linolenic acid, palm oil, sunflower oil, coconut oil, safflower oil, rapeseed oil and other plants respectively; Fat in animal fat film can be extracted from anhydrous milk fat, lard and other materials; The fat in waxy films can be extracted from beeswax, small turbid resin wax, carnauba and other materials

composite edible packaging materials are made of a variety of substrate combinations and different processing technologies. On the other hand, they will increase work and innovate materials. The base materials include the base materials used above, such as starch, protein, polysaccharide materials, fat materials and their necessary additives. In addition to some edible packaging materials introduced above, there are other types of edible packaging materials, such as expanded food packaging materials

edible packaging materials are a hot topic in the research of packaging materials at present, and new varieties and technologies continue to appear, which have been applied in many fields of commodity circulation, especially in packaging paper and food

in terms of edible wrapping paper, such as casing, fruit wax, sugar coating, glutinous rice paper, ice coating, tablet coating, etc., because this kind of wrapping paper has important environmental protection and economic value, it is prepared to increase the enthusiasm of researchers in various countries. At present, there are two kinds of edible wrapping paper abroad: one is to use vegetables as the main raw material, beating and drying vegetables after forming; The other is to gelatinize starch and sugar, add other food additives, and take a method similar to the papermaking process. From the perspective of application and development prospects, green products with vegetables as raw materials have more development potential

Japan is the first country to develop vegetable paper. At present, Japanese vegetable paper has achieved large-scale production, and its processing technology and equipment have entered the fourth generation, with a maximum daily output of 30000 pieces per production line. Sakai Institute of physics and chemistry in Japan has successfully developed pure food fiber made from protein extracted from soybean dregs, and then processed into edible packaging paper, as well as fruit paper, vegetable paper, seaweed paper, etc. There are two kinds of processes: die pressing and roller pressing. Considering the huge potential of the market, countries are actively carrying out research on vegetable paper and its products

edible packaging in food, such as the fresh-keeping film of oily food, this kind of packaging mainly uses soybean protein as raw material. At present, the main products are film packaging materials. Edible packaging materials similar to plastic films are made by using protein extracted from soybeans, adding plasticizers and film-forming agents that are harmless to humans or animals such as glycerol and sorbitol, etc. through casting and other methods. This kind of packaging film has good moisture resistance, elasticity and toughness, high strength, at the same time, it also has a certain antibacterial and disinfection ability, which has a good effect on maintaining moisture, preventing oxygen infiltration, and preventing the oxidation of contents. When used in oily food with high fat content, this kind of packaging material can maintain the original taste of the food. It is an ideal oily food packaging material, which can be made into casings, tofu casings, meat and other packaging skins

in addition, the applications of edible packaging materials in food include fruit, poultry and egg packaging, frozen food packaging, dry goods and pastry packaging, thick flavor material packaging bags, etc

with the research and development of edible packaging materials, edible packaging materials inevitably face many problems according to the government of the State Forestry Administration:

(1) performance needs to be improved. The edible time is 1~2 seconds. Whether it is the processing and molding of packaging containers, the performance of the packaging products obtained 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. What restrains the development of polyurethane industry today is the problem that the cost of material development is too high. 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

due to the diverse functions of edible packaging, environmentally friendly, convenient and edible, the food industry in developed countries has competed in the research and development of new products and technologies in recent years. At present, China is also promoting "degradable" food packaging materials and gradually banning the use of non degradable materials, so as to control the troublesome "white pollution" and lay the foundation for the next development of "edible packaging". However, at present, from the perspective of this research, the latest research topic is abroad, and at least eight food departments in the United States have set up research topics on edible packaging. The Department of food science and nutrition at the University of Minnesota has a research team specializing in edible food preservative films containing different ingredients. The Department of agriculture and bioengineering of Clemens university has carried out extensive research on edible films made of protein membrane materials. The University of Wisconsin research team led by finima used polysaccharides and fats to develop a double-layer edible film of moisture resistant polyethylene film, and used it in a "simulated food" to achieve superior results. The French research team headed by Gerbert also carried out extensive research on edible membranes. Japan and Germany have also carried out extensive research in this field. It is particularly worth mentioning that the United States and Japan have accumulated a large number of patented technologies in this field

in China, 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. However, from the perspective of market prospects, the development trend of edible packaging and the latest international research trends of edible packaging materials, China should increase research investment in this area. The development of packaging products should focus on edible packaging materials

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