Development trend of modern food packaging materials
in order to ensure the safety of packaged food, food packaging materials must have high barrier. Fat food requires high oxygen and oil resistance; Dry food is required to have high moisture resistance, and aromatic food is required to have high fragrance retention; Fresh fruits and vegetables require high oxygen in packaging. Second, this is the main reason for the current rise in vanadium prices, which is the permeability of carbon oxide and water vapor. In addition, food packaging materials should have high tensile strength, tear resistance, impact resistance, excellent chemical stability, and do not have any chemical reaction with the inner food to ensure food safety; In addition, it should have high temperature resistance to meet the requirements of high-temperature disinfection and low-temperature storage of food
new high barrier packaging materials
commonly used high barrier packaging materials include aluminum foil, nylon, polyester, polyvinylidene chloride, etc. With the improvement of food protection requirements, new high barrier plastic packaging materials have been widely used abroad. The use of high-strength high barrier plastic can not only improve the protection of food, but also reduce the amount of plastic when packaging the same amount of food. For processed foods requiring high barrier protection, vacuum packaging, inflatable packaging, etc., high-quality composite packaging materials are generally used, and there must be more than one layer of high barrier materials in the multi-layer composite materials. For example, nano modified new high barrier packaging materials, nano composite polyamide, ethylene vinyl alcohol copolymer, polyvinyl alcohol, etc
active packaging materials
the application of active packaging materials and active packaging technology has become a development trend of food safety packaging. The so-called active packaging technology is to use active packaging materials to interact with the excess gas inside the packaging, so as to prevent the oxygen in the packaging from accelerating the oxidation of food. In the 1970s, the deoxygenation active packaging system came into being, and soon deoxidizers began to be used in food packaging. Facts have proved that active packaging can effectively maintain the nutrition and flavor of food. Due to the progress of material science, bioscience and packaging technology, active packaging technology has developed rapidly in recent years, among which iron deoxidizer is a kind of fast-growing one. Nitrite system, enzyme catalytic system, organic deoxidizer, photosensitive deoxidizer and so on have appeared successively, making the safety of packaged food increasingly perfect
new food safety packaging materials
intelligent packaging materials. Intelligent packaging materials used for food safety packaging mainly include display materials, sterilization materials, bacteria testing materials, etc. Recently, Canada launched a unique packaging material for detectable bacteria, which can detect Salmonella, Campylobacter, Escherichia coli and Listeria. In addition, the packaging material can also be used to detect the protein content of pests or genetically engineered food, and indicate whether it is genetically engineered food
a Sino Malaysian company in Japan has decided to build a comprehensive friendly partnership for the future. A food company has recently launched an antibacterial plastic packaging container, which is synthesized from fiber plastic and polypropylene, and then mixed with an antibacterial agent for food film, "Since we must continue to improve the energy performance of buildings to prevent the proliferation of microorganisms and bacteria.
UV resistant packaging materials for food. Recently, Ciba Specialty Chemicals developed a UV barrier, which can protect the food in the package from UV damage, improve the safety of packaged food, test and analyze various mechanical performance indicators, and extend the shelf life.
for food packaging Multifunctional preservative. Japan has recently developed a long-acting and multifunctional preservative for food packaging. It can effectively inhibit the growth of aerobic, anaerobic, facultative (i.e. aerobic and anaerobic) and other microorganisms, and it is simple and safe to use, does not affect food flavor, and can greatly extend the shelf life of packaged food
the newly invented deoxidizing preservative has good effect. Due to the anti microbial, anti-corrosion and disinfection effects of ethanol, the food sealed in the package is full of alcohol essence. The effect of preserving food is better than adding alcohol directly to the food, which will not make the food have a strong alcohol taste, lose the original flavor and reduce the value of goods
sterilized active packaging materials. Recently, a kind of active packaging system that can sterilize has been successfully studied abroad, including sterilization system. It is a system that combines active sterilization substances with packaging materials. For example, sorbitol, sorbate, sodium benzoate, silver zeolite and other substances are added to the materials for manufacturing packaging containers, and then they are manufactured into containers to slowly release sterilization active ingredients. The newly invented sterilizing deoxidizing preservative can remove more than 99.9% of the oxygen in the sealed container within 24 hours and produce deoxidizing effect in a very short time
sterile high barrier food packaging materials. In view of the defects that the packaging made of aluminum foil and some materials is opaque, not easy to recycle and cannot be used for microwave heating, in recent years, researchers have successfully developed a sterile SiOx plated packaging material, that is, in a vacuum environment, a very thin layer of silicon oxide is plated on pet, PA, PP and other plastic film substrates, and then it is made with sterilization function. It not only has excellent barrier property, but also has excellent adaptability to the atmospheric environment. Its barrier property is not affected by the change of ambient temperature. SiOx coating cost is high, and the large-scale production technology is not perfect. At present, China has begun a certain scale of research, and developed countries have been applied in food packaging
food safety is a huge project, which requires not only excellent packaging materials and advanced packaging technology, but also unity, scientificity and fairness. Food packaging industry is a sunrise industry in the 21st century. With the continuous improvement of people's quality of life and the increasing emphasis on healthy consumption, there will be higher requirements for the quality and safety of packaged food, and the field of food packaging materials will also usher in great development
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