Latest edible casein packaging film

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The new edible casein packaging film

edible packaging film is the research hotspot of packaging materials in recent years. Generally, the edible packaging film used in the company's electronic universal experiment takes polysaccharides, cellulose and protein as the main basic materials, compounded with organic materials such as esters, to form an edible packaging film with good mechanical processing performance. Protein, as the basic material of edible packaging film, has many advantages. However, the previous protein extraction is generally limited to plant materials. Most of these packaging films made of plant materials do not have water resistance and moisture resistance, and their mechanical properties are greatly reduced in case of water. Recently, American researchers have found a new method to continuously prepare film from milk protein. Through this method, edible and waterproof packaging film can be prepared, and this packaging film can be seen in some dairy products packaging in the United States

this edible packaging film uses casein in milk as the main raw material. It makes use of the unique characteristics of casein, which is the main nutritional component of cheese. It can not only be used as the food packaging film of jc/t907 (2) 002 concrete interface treatment agent, but also as a food supplement. It can also be used as the adhesive of food packaging. In the process of using the equipment, it is inevitable to encounter a variety of fault problems. It is also the finishing material of paper and textiles, and even paint

casein has very good advantages as a packaging film. Its natural structure enables it to form a waterproof and biodegradable film or coating. Casein film can be produced into high-quality thin films like thin coatings, which can not only be directly adhered to the product as inner layer packaging, but also be applied to some middle-level packaging films. Casein packaging film can well protect the product from damage and pollution, forming a barrier to prevent the product from contacting with external substances; At the same time, the edible film can be used for packaging dairy foods, such as cheese, or components of laminated products used in the packaging of farmhouse cheese or yoghurt, because the waterproof property of casein can lock moisture; Some edible materials such as seasoning, vitamins or minerals can also be added to the casein packaging film, which also improves the edible properties of the packaging film itself

this process uses an ARS patented method, which is developed by Binxi method 9 Speed accuracy: within ± 0.5% of the indicated value; Developed by Peggy tomasula of ERRC dairy processing and product research unit in wyndmoo, nya. Her extraction method is to use high-pressure carbon dioxide to separate casein from milk. Tomasula experiment found that if the casein was mixed with water and glycerin and dried naturally without interference, it would form a water-resistant, soft and film like material. The mechanical properties of the films made from casein in the past can not meet the needs of packaging materials. The biggest problem is that they do not have waterproof properties, and moisture can quickly dissolve them. The new material can still remain intact when immersed in water. It has very good waterproof and moisture resistance, which is much better than other basic protein films in the past

previously, due to technical limitations, this kind of film has not been continuously manufactured on a large scale. Michaelkozempel and tomasula, chemical engineers recently retired from ERRC, have developed a breeding process for continuous production of bovine casein films. The kozempe experiment determines which conveyor is used to spread the casein solution evenly and which area of the dry film is easiest to move. And in order to manufacture the film within 3 hours, he specified the drying conditions and temperature. These conditions realized the feasibility of large-scale manufacture of bovine casein membrane. This process can continuously produce casein packaging film, and can be used to improve other proteins. This process establishes the feasibility of commercial production of biodegradable polymer packaging film from dairy products. Kozempel also confirmed that 20% casein can be replaced by skimmed milk powder, which can reduce the cost of the film without losing physical properties. Ars has filed the patent production of continuous production process, and is looking for business partners to bring it to the market. It is believed that in the near future, casein packaging film can be used in food packaging and become a green substitute for traditional plastic packaging film

source: China Packaging News

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