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2022-08-23
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New packaging materials continued: edible packaging materials made of fish skin

[China Packaging News] with the rapid development of food technology and packaging industry, many new packaging materials and packaging forms continue to appear. Among them, experts believe that edible environmental protection packaging materials will lead the sustainable development of the food packaging industry. In recent years, sustainable packaging and green packaging have become a hot topic in China's food packaging industry

new research and development: the edible protein film is made of fish skin

the crab meat stick has a layer of plastic film. Careless diners often throw it into the hot pot to cook, inadvertently creating toxins. However, if edible protein membrane is used, this problem does not exist. Recently, Weng Wuyin, a teacher of the College of bioengineering of Jida, developed such a membrane

renewal of new packaging materials: edible packaging material fish skin

this scientific research achievement has been patented. This edible protein film can be dissolved in water at high temperature. It can not only replace the plastic film of crab meat stick packaging, but also replace the packaging of instant noodles seasoning. In this way, when cooking instant noodles, it is OK to throw the seasoning bag directly into the water

Weng Wuyin said that the raw material of this edible protein film is nutritious protein. He has experimented with two kinds, one is the fish protein film processed from fish meat, and the other is the edible and degradable collagen film with the raw materials of fish skin, fish head, fish scales, etc., with a thickness of about 25 microns to 30 microns

this magical protein membrane. It is slightly thicker than plastic film, colorless and tasteless, and its permeability is worse than plastic film, but its feel is the same as plastic film

Weng Wuyin said that at present, no domestic enterprise has produced edible packaging film, and soybean protein is the most resistant to the upper chuck in the research on protein film

Weng Wuyin has studied in Japan for many years. He said that Japanese like to eat sashimi, and there is also a great demand for the plastic film wrapped with sashimi. A few years ago, they were studying edible protein membrane technology. He felt that the technology content of the products he currently developed was comparable to that of Japan

Weng Wuyin said that China's annual output of aquatic products ranks first in the world. A large amount of waste will be generated in the processing of fish aquatic products, especially in the production of frozen fish fillets and the processing of surimi. Statistics show that when enterprises process frozen fish fillets, the meat yield is less than 40%, that is, producing a ton of fish fillets will produce about 1.5 tons of fish skin, fish head, fish scales and other waste. Directly discarding them will not only waste resources, but also cause serious pollution to the environment. At present, almost all food packaging uses plastic products. With computers, the harm it brings to the environment is obvious. With fish skin as raw materials, both edible and low-carbon environmental protection are taken into account

Weng Wuyin estimated that the cost of one square meter of edible protein membrane only needs to be about 0.3 yuan higher. More importantly, the edible protein film is not easy to age. It can be stored for one year at 40 ℃, and its physical properties will not change

Weng Wuyin said that if the impermeability and corrosion resistance of edible protein film are further improved, a completely degradable protein film can be made to replace plastic packaging film and reduce the use of plastic film. And bring cleaner energy

Weng Wuyin is considering mass production of edible protein film through mechanized means, so that this patent can go to the market from the laboratory

edible packaging materials enter the market

as the concept of low-carbon environmental protection has become the main theme of society, many fields are practicing it, and so is the field of packaging materials. With the rapid development of food processing industry, the need for packaging is also increasing. It is understood that there are many kinds of green packaging materials on the market, which can be generally divided into reusable and recycled packaging materials, edible packaging materials, degradable materials and paper materials

reusable packaging materials are mainly used for glass bottle packaging of beer, beverages, etc., which can be used repeatedly for many times; Recycled packaging materials are mainly plastic packaging, which can be made into recycled packaging containers after physical treatment, and recycled packaging products after chemical treatment. However, these two methods are flawed. They only reduce the pollution to the environment, and in the end, they have to face the problem of polluting the environment

degradable material packaging can degrade and restore itself after use, without pollution to the environment; The paper packaging made of natural plant fiber has high recycling value and mature technology

edible packaging materials take natural edible substances (such as polysaccharides, proteins, etc.) as raw materials, and form edible packaging films through the interaction between different molecules. According to different materials and processes, it can be divided into polysaccharide edible packaging film, protein edible packaging film, composite edible packaging film, etc

according to Chinese packaging, relevant scientific research institutions and packaging enterprises have begun to carry out the preparation and Performance Research of new edible packaging films. In fact, in China, many edible packaging have already been used in real life. For example, wax, oil and gelatin coated on the surface of food and fruits can effectively slow down the loss of water and prolong the shelf life; The glutinous rice paper coated on the outer layer of candy and cakes is made of starch such as sweet potato, corn or wheat flour, which melts immediately in the mouth to prevent adhesion with the outer package; Corn baking packaging and sausage casings of ice cream cones are typical edible packaging. With the rapid development of China's food packaging industry, the development of new edible and environmentally friendly packaging materials is considered to be an important means to achieve the sustainable development of food packaging industry

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