The hottest PVDC film is currently widely used in

2022-08-16
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PVDC film is currently widely used in food packaging

among the current types of meat products in China, ham sausage products have long shelf life and cleaning methods: it is convenient to fill the oil belt in the horizontal tensioner oil tank, which occupies a large part of the market, among which ham sausage casing plays an important role. At present, the casing packaging of ham sausage is mostly plastic film, among which PVDC film is widely used

pvdc, namely polyvinylidene chloride, is a light yellow high barrier material. In addition to the general properties of plastic, it also has the properties of quenching, oil resistance, flavor retention, excellent moisture and mold resistance of Jinan experimental machine service system, as well as excellent printing and heat sealing properties. It is a kind of packaging material with better comprehensive barrier performance in plastic packaging in the world today. It is not only different from the sharp decline of gas resistance of polyvinyl alcohol with the increase of moisture absorption, but also different from the deterioration of moisture resistance of nylon membrane due to water absorption. It is a high barrier material with good moisture and gas resistance. In practical application, PVDC coating has no special requirements for printing ink and equipment, so there is no need to change the process of each process, which can greatly improve the production efficiency and reduce the cost

composite packaging using PVDC uses much less materials than ordinary PE film, paper, aluminum foil, etc., which can achieve the purpose of reducing packaging and waste sources. In the United States, PVDC products are non-toxic and safe plastic materials, which have been widely used in food packaging; In Germany, the packaging material has a green mark; About 60% of the small packaged food, drugs, chemical products and electronic products circulating in the markets of Japan and South Korea use PVDC packaging. With the popularity of this new packaging material, the output of PVDC resin in western countries has increased year by year in recent years, with an annual growth rate of about 2% in the United States and nearly 10% in Japan. In view of the current situation that the level of food packaging in China is still relatively backward, relevant experts pointed out that the promotion and use of PVDC materials can not only improve the grade of packaging products in China, but also reduce the losses caused by product packaging, so as to enhance market competitiveness and greatly reduce food consumption

sausage meat packaging requires casings, and natural casings are certainly the best choice. However, the number of natural casings in China can not meet the needs, and the shelf-life is relatively short, so the sausage casings generally use mold proof plastic film. At present, EVOH has the best barrier performance of casing materials. EVOH is a copolymer of ethylene vinyl alcohol. The United States has developed to the third generation of products, but this material is expensive. At present, the average annual growth rate of this industry in China is more than 15%, and it is used in the United States and other economically developed countries. Due to different economic levels, living habits and consumption habits, EVOH is not used in food packaging such as casings in China

pvdc is the first developed high permeability material with a long history of use. It has been used in food packaging since the 1980s and is mainly used as casing film in China. PVDC has excellent oxygen and humidity resistance, but it is opposed by environmentalists because of its chlorine content. It is a banned material in some European countries. In China, PVDC is used in casings of three well-known domestic manufacturers, Shuanghui, Chundu and Jinluo, due to its good barrier and permeability. Although PVDC used in the casing film is only used in the middle layer and does not directly contact with meat products, PVDC will not cause safety problems to human body in the eating process of meat products, but when it becomes waste for incineration, it will release chlorine, chlorine and water will generate hydrogen chloride with corrosive effect, and then form hydrochloric acid, which is highly corrosive, and will have a great impact on the environment. Therefore, the production of PVDC is now small, and its development is also limited. However, polyethylene or polyvinyl alcohol (PVA) is the material that plastic film casings directly contact with meat products. These two materials will not cause safety problems, even if they are processed at instantaneous high temperature in the microwave oven. Therefore, the plastic film casings currently used in China have no safety problems

however, with the improvement of environmental protection requirements, the development of new barrier films has become increasingly urgent. Among them, multi-layer co extruded nylon film casing is an ideal casing product. At present, domestic research and development in this area has made some progress. Of course, with the development of packaging technology, new packaging materials will emerge in endlessly. In addition to the materials mentioned above, edible materials such as soybean film and starch film have also appeared in casing packaging, but they are still in the research stage. However, due to cost, process and other reasons, it will take some time to market

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