Packaging Materials
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New high barrier packaging materials
Commonly used high barriers are aluminum foil , nylon , polyester , polyvinylidene chloride and the like. With the increasing protection requirements of foods, new high-barrier plastics have been widely used abroad. The use of high-strength and high-barrier plastics not only improves the protection of food, but also reduces the amount of plastics when packaging the same amount of food. For processed foods requiring high barrier protection, as well as vacuum packaging, pneumatic packaging, etc., high-quality composites are generally used, and more than one layer of high-barrier materials must be used in the multilayer composite. For example, new nano-modified high-barrier packaging material nanocomposite polyamide, ethylene - vinyl alcohol copolymer, polyvinyl alcohol and the like.
active
The application of active and active packaging technologies has become a trend in food safety packaging. The so-called active packaging technology uses the activity to interact with the excess gas inside the package to prevent the oxygen in the package from accelerating the oxidation of the food. In the 1970s , deoxygenated active packaging systems came into being, and soon deoxidizers began to be used for food packaging. Active packaging has proven to be effective in maintaining the nutrition and flavor of foods. Due to advances in materials science, biological sciences and packaging technology, active packaging technology has developed rapidly in recent years. Among them, iron-based deoxidizers have developed rapidly, and nitrites , enzymes , organic deoxidizers , the photosensitive deoxidizer, so that the safety of packaged foods has improved steadily.
Food safety packaging new materials
Smart . The intelligence used for food safety packaging mainly includes display materials, sterilizing materials, and measuring materials. Zui is near, the measurable pathogens introduced in Canada are unique, which can detect four pathogens such as Salmonella, Campylobacter, Escherichia coli and Listeria. In addition, it can also be used to detect the protein content of pests or genetically engineered foods, indicating whether it is a genetically modified food.
A food company in Japan has recently introduced an antibacterial plastic packaging container, which is made of fiber plastic and polypropylene, and is mixed with an antibacterial agent for food film to prevent the proliferation of microorganisms and bacteria.
UV protection of food
Zui is near, Ciba Refinery has developed a UV blocker that protects the food inside the package from UV rays, improves the safety of packaged foods, and extends shelf life.
Multifunctional preservative for food packaging
Japan Zui has developed a long-acting, multi-functional preservative for food packaging. It can effectively inhibit the growth of a variety of microorganisms such as aerobic, anaerobic, and facultative (ie, aerobic and anaerobic), and is simple and safe to use, does not affect the flavor of food, and can greatly extend the shelf life of packaged foods. The newly invented deoxidizing preservative has a good effect. Because the ethanol has antibacterial effect, antiseptic effect and disinfection effect, the sealed and sealed food is filled with alcohol gas, and the effect of preserving the food is better than adding alcohol directly in the food, so that the food does not have strong alcoholic taste and loses the original flavor. And reduce the value of goods.
Sterilized activity
Zui has successfully researched a sterilizable active packaging system, including a sterilization system. It is a system combining active sterilizing substances, such as sorbitol, sorbate, sodium benzoate, silver zeolite and the like into a material for manufacturing a packaging container, and then is formed into a container and slowly released. Sterilize the active ingredient. Sterilization type deoxy preservative new invention, the oxygen within 24 hours can remove the sealed vessel 99. More than 9 %, the deoxidation effect is produced in a very short time.
Sterile high barrier food
In view of the fact that the packaging made of aluminum foil and some materials is opaque, difficult to recycle and cannot be used for microwave heating, in recent years, researchers have developed successful aseptic SiOx plating , ie in PET , PA , PP, etc. in a vacuum environment. The plastic film substrate is coated with a very thin layer of silicon oxide, which is then made into a sterilization function. It not only has excellent barrier properties, but also has excellent atmospheric environmental adaptability, and its barrier properties are not affected by changes in ambient temperature. The cost of SiOx coating is relatively high, and the large-scale production technology is still not perfect. At present, China has begun research on a certain scale, and developed countries have applied it in food packaging.