PET in food packaging on the rapid development On food production enterprises, more than 30 years people have been explored to replace the bottles and cans of tinplate packaging materials and containers, and plastic is the best material can be used. It has the characteristics of light weight, can reduce transportation costs. But not all apply to each type of plastic food packaging. In the early 1970s, the PAN took the lead in plastic containers on the market there. But later the U.S. Food and Drug Administration (FDA) on the withdrawal of such materials in food containers used in recognition of the most important reason is that such packaging materials in a chemical substances will be moved to the over-the contents of containers loaded - In. Polyvinyl chloride (PVC) plastic containers because of environmental problems, quickly became unpopular material. Polyester (PET) material to the emergence of food packaging has been developing rapidly. The earliest use of PET bottles of soft drinks company Coca-Cola Enterprises is the United States, they used the 1.5-litre PET bottles to replace one litre glass bottles, with the result that retail sales rose by 27 percent. After, PET containers packaged food and beverage gradually become popular, "popular." PET containers are light weight and has attracted strong customer firmly by the market welcomed. PET material there is a big advantage is that you can create any shape (good applicability), can also be processed and the people of hobbies color, text and logo can be printed. The growth of environmental PET Since the 1990s, in Europe, the containers used PET resin market to 10 percent average annual growth rate. Eastern European countries universal access to PET plastic containers in a longer time, the consumption growth rate of PET was 12%. European Union (including the willingness to join the European countries) the annual use of about 1.6 million tons PET resin, used in PET containers around the world amounted to 100 million over 1500. In the last few years, PET containers is the use of the fast growth was mainly carbonated drinks used PET bottles to packaging containers. Today, food or drink with the number and variety of growing, PET is the use of continuous growth. The future, PET materials will be beer and dairy products to the infiltration of development. PET development of the scope of application provided that the commercial application of the present is still in the development of many special technologies. The adjustment of production lines Just drink bottles on the production line to be adjusted slightly, it can adapt to the use of PET bottles. This is not a high capital investment of small manufacturers is very favorable terms. At the same time, PET no damage and light weight, and the cost of transportation than the small bottles, but also by enterprises attach importance to and welcome the merits. Delivery from the PET can immediately enter the low-temperature filling, aseptic filling, the filling lines, such as hot filling, and then tagged and sealed. Aseptic filling Ordinary PET containers need to be supplemented barrier coating materials or processed, the only product of the sterile filling. This is due to adopt the barrier of packaging materials to ensure the effectiveness of sterile filling - to extend product shelf life. Aseptic filling the advantages of low temperature is no need for heat treatment can extend the shelf-life products. However, the production workshop on the ground and equipment must ensure that meet the high standard of hygiene requirements. Since the low-temperature sterilization, do not have to use high-temperature, after filling the sensory characteristics of food, such as color flavor and nutritional value will not be affected. Coating layer (coating treatment) Ordinary PET containers can not guarantee that extended the shelf life of products. France’s Sidel (Sidel) is the first company in PET containers coated on the import of the enterprise system. They advocated the barrier is to control oxygen in the atmosphere in the thirtieth, and the control of carbon dioxide in the seventh. The thickness of the coating for 1 μ m, known as AC-TIS. Now several companies using the same method of coating. For example, Tetra pak (Tetra Pak)’s Glaskin (coating method name, the same below) and Krones’s Best PET (best PET) to take silicon oxide coating materials, and PPG is coated epoxy products Amine Resin materials, Rown Cork & Seal Company of the coating material is Polyvinylidene Chloride (PVDC). The method can also apply for different ideas and different. Use of the technology have a vacuum, atmospheric pressure plasma deposition under the law, as well as static or anaerobic conditions under the law of the sub-plating Satin.
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