Food Packaging Materials Innovation Process

1. Common packaging materials

Paper, plastic, metal, and glass are common packaging materials for the food industry. Since the paper and paper products can be recycled after use, a small amount of waste can be naturally decomposed in the natural environment and have no adverse impact on the natural environment. Therefore, the world's workers' paper, paperboard and products are green products and meet the requirements of environmental protection. Governance The white pollution caused by plastic can play a positive role.

Plastic packaging materials belong to the shortest period of use of plastic products, generally 1 to 3 months, the longest year, after which mostly become urban solid waste into the garbage disposal system, and some are discarded at random, becoming "white pollution." Plastic packaging materials account for the largest proportion of waste, and their environmental pollution is also the most serious of all types of packaging materials. The current treatment plan is: the combination of recycling and development of the application of degradable plastics. Because metal packaging materials are easy to recycle and easy to handle, their waste pollution to the environment is smaller than plastic and paper.

Because metal packaging materials are easy to recycle and easy to handle, their waste pollution to the environment is smaller than plastic and paper. Commonly used metal packaging materials are tinplate and aluminum, which are widely used in the manufacture of food and beverage cans. Milk, soft carbonated drinks, alcohol, and jams are commonly used in glass containers. The main characteristics of glass packaging materials are aesthetics, hygiene, corrosion resistance, low cost, and are inert materials with low environmental pollution.

2. Innovation of plastic packaging

Plastic packaging is mainly to improve the design and provide more convenience; to improve the structure of composite materials, to meet 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 and Japan developed ethylene and carbon dioxide gas for the release of fruits and vegetables, and developed products such as insulation paper and anti-corrosion paper. The development trend in the future is the rapid development of multilayer composite airtight plastics, functional plastics, and biodegradable plastics. For example, in the United States, lactic acid is further polymerized into biodegradable plastics; Italy uses corn starch to produce biodegradable plastics. At present, the United States, France, Italy and other countries have monopolized the multi-billion-dollar international market. The development of biodegradable plastics in China is also very fast. For example, packaging materials such as food containers, pulp and plant fibers made of starches such as potato and corn, and “bio-controlled biodegradable double degradation” plastics, but the market share is still not High, so the prospects are bright.

With the development and progress of science and technology, food packaging materials and containers have also undergone major changes. Research and development of various new materials and new materials processing technologies, especially the emergence of new polymer materials, have provided food packaging A vast world.

3. High pressure food packaging trends

The recent introduction of high-pressure food packaging features vitamins, aromas, and pigments in foods that do not change due to pressurization, so that foods retain their natural flavor without damaging nutrients. From jams, fruit juices, vegetable juices to meat, fish, eggs, soy protein, etc. can be treated with high pressure. For example, a mixture of protein and minced meat can be made into soft, elastic meat products by high-pressure treatment. High pressure treatment can also tenderize beef. The rice that was stored for a year can also be improved by high pressure treatment. The boiled rice is as aromatic as the new rice. High-pressure processed packaged foods are very popular in Japan and three kinds of jams (strawberry jam, kiwifruit jam, apple sauce), three kinds of dessert sauces, and three types of fruit sauces have been introduced. These foods were processed through 400-500 MPa and were packaged with high-quality packaging materials. The packaging design was reasonable and the printing was beautiful. The color and flavor of the products were better than the original products of the same kind. Although the prices were higher, they were still popular with consumers. And favored.

4. Pursue Nano Packaging Technology

The addition of nano-particles to packaging materials (such as plastics and composites) produces odor-elimination and sterilization. Nowadays, some of our companies are using this technical feature. The addition of nanoparticles to the food in the refrigerator greatly extends the shelf life. Nanoparticles can also be added to paper, plastic and composite materials for packaging foods, which can increase the shelf life of packaged foods.

When researching the fresh-keeping packaging of fresh fruits and vegetables, it was found that in the fresh-keeping packaging, the fruits and vegetables released ethylene, and when the ethylene reached a certain concentration, the fruits and vegetables would accelerate rot. Therefore, ethylene absorbers should be added to the fresh-keeping packaging to reduce the ethylene content in the package to improve the freshness and shelf life. It can accelerate the oxidation of ethylene released from fruits and vegetables to achieve a good preservation effect. The nanoparticles used as oxidation catalysts mainly include Fe304, Fe203, Co304, Nio, and Pt, Rh, Ag, Pd, and the like.

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