Innovation of the hottest food packaging materials

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Innovation of food packaging materials

1 Commonly used packaging materials

paper, plastic, metal and glass are commonly used packaging materials in the food industry. Since paper and paper products can be recycled after use, a small amount of waste can be naturally decomposed in the natural environment where the big experiment failed, and there is no adverse impact on the natural environment, so the world's workers' paper, paperboard and products are green products, which meet the requirements of environmental protection, and can play a positive substitute role in the treatment of white pollution caused by plastics

plastic packaging materials belong to the varieties with the shortest service cycle among plastic products, generally 1-3 months, up to one year. Since then, most of them have become municipal solid waste into the garbage treatment system, and some have been discarded at will, becoming "white pollution". Plastic packaging materials account for the largest proportion of waste, and its pollution to the environment is also the most serious among all kinds of packaging materials. The current treatment plan is to combine recycling with the development and application of degradable plastics. Because metal packaging materials are easy to recycle and handle, their waste has less environmental pollution than plastic and paper

due to the easy recycling and disposal of metal packaging materials, their waste has less environmental pollution than plastic and paper. Commonly used metal packaging materials include tinplate and aluminum, which are widely used in the manufacture of food and beverage packaging cans. Milk, soft carbonated beverages, alcohol and jam are generally packaged in glass containers. The main application of glass packaging materials for ul859 is characterized by beauty, sanitation, corrosion resistance, low cost, inert materials and little environmental pollution

2. Innovation of plastic packaging

Plastic packaging is mainly to improve the design and provide more convenience; Improve the structure of composite materials to meet the structure of composite materials and meet more stringent requirements; The new products of paper packaging focus on the improvement of functionality. For example, the United States and Japan have developed ethylene and carbon dioxide gases for fruits and vegetables, and developed some products such as heat preservation paper and anti-corrosion paper. In the future, the development trend is multi-layer composite impermeable plastics, functional plastics, and biodegradable plastics. For example, lactic acid is further polymerized into biodegradable plastics in the United States; Italy uses corn starch to produce biodegradable plastics. At present, the United States, France, Italy and other countries have monopolized the international market of billions of dollars. Biodegradable plastics in China are also developing rapidly, such as food containers, pulp, plant fiber and other packaging materials made of starch such as potato and corn, as well as "light biological controllable double degradation" plastics, but the market share is not high, so the prospect is broad

with the development and progress of science and technology, great changes have taken place in food packaging materials and containers with speed regulating potentiometer at zero position. The research and development of various new materials and new material processing technologies, especially the continuous emergence of new polymer materials, have provided a broad world for food packaging

3. The trend of high-pressure food packaging

recently began to launch high-pressure food packaging, which is characterized by the fact that vitamins, flavors, pigments, etc. in food will not change due to pressure, so as to maintain the natural flavor of food without damaging nutrients. From jam, fruit juice, vegetable juice to meat, fish, eggs, soy protein can be treated by high pressure. For example, the mixture of protein and broken meat can be made into soft and elastic meat products through high-pressure treatment. High pressure treatment can also tenderize beef. The quality of aged rice stored for one year can also be improved by high-pressure treatment. The cooked rice is as fragrant as the new rice. The packaged food after high-pressure treatment is very popular in Japan, and now there are 15 kinds of jam (strawberry jam, kiwi jam, apple jam), six kinds of dessert, three kinds of fruit sauce and three kinds of fruit condiments. These foods are processed by MPA and packed with high-quality packaging materials. The packaging design is reasonable, the printing is beautiful, and the product color and flavor are better than the original similar products. Although the price is higher, it is still deeply welcomed and favored by consumers

4. Pursue nano packaging technology

Add nano particles to packaging materials (such as plastics and composite materials), so that they have the effect of odor removal, sterilization and disinfection. Now some of our enterprises use this technical feature to add nanoparticles to the food in the refrigerator, which greatly extends the shelf life. Nano particles can also be added to paper, plastic and composite materials for packaging food, which can improve the shelf life of packaged food

when studying the fresh-keeping packaging of fresh fruits and vegetables, it is found that in the fresh-keeping packaging, fruits and vegetables release ethylene. When ethylene reaches a certain concentration, fruits and vegetables will accelerate their decay. Therefore, ethylene absorbent should be added to the fresh-keeping packaging to reduce the ethylene content in the packaging, improve the fresh-keeping effect and prolong the shelf life. It can accelerate the oxidation of ethylene released from fruits and vegetables, so as to achieve a good fresh-keeping effect. Nanoparticles used as oxidation catalysts mainly include Fe304, Fe203, co304, NiO, Pt, Rh, Ag, PD, etc

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