The purpose of food packaging is to protect foods from chemical physics and microbiological factors, ensure that the nutritional composition and inherent quality of foods are not changed, and thus protect the health of consumers. In addition, packaged foods provide many convenient conditions for transportation, storage, sale, and use, while promoting sales. Reasonable food packaging can prolong its shelf life and shelf life, and it greatly reduces the tendency of foods to deteriorate.

Factors that affect the quality of food: - Light; Second, temperature; Third, oxygen; Fourth, humidity;

From the three perspectives of food production, sales and consumption, the purpose of food packaging is: to prevent spoilage and to ensure quality; second, to prevent the contamination of microorganisms and dust; thirdly, to rationalize and speed up food production; Conducive to transportation and circulation; Fifth is to increase the value of food products.

The food industry is the largest user and beneficiary of packaging. The development of the food industry and packaging are inseparable. Sometimes, some packaging processes can greatly change the food industry's product structure, industrial structure and development process. A typical example is the combination of a packaged beverage and a sterilizing process.

Food Packaging Material Innovation

Since paper products can be recycled after use, a small amount of waste can be naturally decomposed in the natural environment, and there is no disharmony to the natural environment. Therefore, the world recognized that paper, paperboard and paper products are green products that meet the requirements of environmental protection.

Plastic packaging is mainly to improve the design and provide more convenience; to improve the structure of composite materials to meet more stringent requirements; new products for paper packaging are focused on functional improvements. For example, the United States, Japan, and other countries have developed paper mats for fruit and vegetable packaging that can absorb ethylene and carbon dioxide gas released by fruits and vegetables, and developed products such as insulation paper and anti-corrosion paper. The future development trend is multi-layer composite airtight plastics and functional plastics. The development of biodegradable plastics is more rapid. Rapid development of biodegradable plastics in China, such as food containers, pulp, plant fiber packaging materials such as potato and corn, as well as "photo-controllable biodegradable degradation" plastics, but the market share is not yet High, so the prospects are bright.

With the development of science and technology, food packaging materials and containers have also undergone major changes. In recent years, the research and development of various new materials and new materials processing technologies, especially the emergence of new types of polymer materials, have provided a vast world for food packaging.

The recently introduced high-pressure food packaging features vitamins, flavors, and colorings of foods that do not change due to pressurization, so that foods retain their natural flavor without destroying nutrients. From jams, fruit juices, vegetable juices to meat, fish, eggs, soy protein, etc. can be treated with high pressure. These foods were processed by 400---500] A. They were packaged with high-quality packaging materials. The packaging design was reasonable, the printing was beautiful, and the color and flavor of the products were better than the original products. Although the prices were higher, they were still consumed by consumers. The welcome and favor.

Add nanoparticles to the packaging material. Make it produce a odor, sterilization and sterilization, can increase the shelf life of packaged foods.

Green packaging is a development trend

What is green packaging? According to experts, it refers to packaging that is harmless to the ecological environment and human health, free of environmental pollution, capable of recycling, recycling, and sustainable development. As a result, developed countries in the world have determined that packaging should be in compliance. The principle of "4R+1D" is low consumption, development of new green materials, reuse, recycling and division degradation. Experts predict that green food will dominate the world market in the next 10 years. Green foods must have green packaging. Active research and development of "green packaging" is an inevitable choice for the packaging industry to face WTO accession in the new century.

To ensure the quality of green foods and maintain the freshness of green foods is the basic function of green packaging. Therefore, green sterile fresh-keeping packaging is the preferred goal of green food packaging.

Green foods must have green packaging. This has become the new style of green food packaging in the new century and has become the mainstream of packaging. The government environmental protection department clearly stipulates that the “four-body” sign should be on the outer package of green food: green food sign, green food text, code, and laser anti-counterfeiting label. Certification unit.

China's food packaging level is lagging behind

China's food packaging materials are a growing market, and in particular, chemical polymer materials have developed at a high rate. The United States, Germany, and Italy use 4.5 million tons, 2 million tons, and 1.9 million tons of plastics for food packaging each year. It is estimated that China's food packaging demand will reach 150-200 million tons this year.

The modern food industry needs scientific food packaging. Although packaging scientific research and new material development in China have been rapid over the past 20 years, it is due to the fact that the packaging industry is a newly-emerging edge discipline and involves a wide range of knowledge, plus the development of packaging research and packaging industry. Late, thin, thin, China's packaging technology is still relatively backward, can not fully meet the requirements of the rapid development of the food industry. In particular, people’s ideas are still old, and there is a general shortage of packaging and over-packaging.

Reasonable food packaging should be properly protective of food, including physical, chemical and biological properties, and exquisite decoration is not exaggerated to facilitate storage, transportation and consumer use.