The most effective way to realize green food packa

Effective ways to realize green packaging of food (Part 1)

green packaging is also called environment-friendly packaging, which generally refers to that the packaging design can not only ensure the integrity of the performance of goods, but also meet the requirements of environmental protection and resource regeneration. Green packaging conforms to the strategy of sustainable development, so it is gradually becoming the mainstream direction of packaging design. Recently, food packaging safety issues have occurred frequently. Therefore, the green packaging branch of the Chinese Society for Environmental Sciences decided to unite the media to issue an industry initiative of self-discipline to all packaging enterprises, hoping that packaging enterprises will consciously abide by national laws and regulations, consciously increase scientific research and innovation, and devote themselves to studying and discussing how to provide more environmentally friendly and healthy green packaging for the public through various effective ways and means

first, adopt green packaging materials

at present, many European and American enterprises pay attention to developing "green packaging materials" that meet environmental requirements. When choosing packaging materials, they try to choose materials that are easy to handle and actively develop new packaging materials. Pulp molding packaging is gradually replacing traditional plastic materials that are difficult to degrade

1. Paper packaging

because the main component of paper packaging is natural plant cellulose, which is easy to be decomposed by microorganisms, it will decay quickly in nature, and will not pollute the environment, which reduces the cost of processing packaging waste, and the raw materials of paper packaging are rich and easy to obtain, so paper packaging has become the internationally popular "green packaging" at present. Paper packaging is widely used to replace metal cans to hold all kinds of liquid drinks, food, milk, etc. for example, the aseptic fresh-keeping carton packaging of "Tetra Pak" developed in Sweden can keep the stored food fresh for 6 months without refrigeration. After recycling, the packaging can be used to make furniture and decorative materials. This aseptic "Tetra Pak" fresh-keeping carton packaging has become the mainstream of liquid food packaging in Europe

pulp molded products not only have the advantages of light weight, low price and shock resistance, but also have the characteristics of good air permeability, which is conducive to the preservation of fresh food. In the international commodity circulation, they are widely used in the turnover packaging of fragile, fragile and overstocked items such as eggs, fruits and glass products

2. Degradable plastics

in September 2005, the Korean food and drug safety agency made regulations to allow polybutylene glycol diacetate (PBSA, namely polybutylene succinate co adipate) to be used in the production of food containers and packaging materials. PBSA material is easy to decompose naturally when touching the ground. It is a green synthetic resin. When used as a disposable food container, it can reduce environmental pollution

under natural conditions, polymers synthesized with petroleum as basic raw materials are easily decomposed by ordinary microorganisms. Both synthetic polymers and natural polymers containing genes prone to hydrolysis have high biodegradability. In China, the incomplete biodegradable plastics mixed with starch and polyolefin plastics are mostly studied. The degradation principle of this kind of plastic is that the starch particles are eroded and consumed by fungi and bacteria first, so as to weaken the strength of the plastic. At the same time, after contacting with some additive classes in the soil, peroxide is formed by self oxidation, which promotes the breaking of the molecular chain of the polymer in the plastic. They promote and complement each other. Bacteria consume starch, which increases the surface area of the plastic and is conducive to self oxidative degradation. Over and over, the polymer chain gradually breaks and shortens, reducing the strength of the plastic until the molecular weight of the polymer is reduced to the extent that it can be metabolized by microorganisms

environmental friendly PE film is a degradable material that will not cause pollution. It belongs to green ecological packaging and saves a lot of paper product packaging. The cost of plastic packaging is only 0.25 yuan, while the cost of carton packaging for beer is 2 ~ 3 yuan. The package makes full use of the scalability of the packaging materials, tightly "wraps" the package to make it a whole, avoids friction and collision between them, and is safer

3. Edible packaging

edible packaging refers to transforming it into an edible raw material when it is about to become "waste" after the packaging function is realized. Edible packaging is a kind of paper like packaging material processed from edible raw materials. This special packaging that can realize the transformation of packaging function is edible packaging. It can be divided into two categories: one is to add some flavoring substances to common food raw materials such as starch and sugar paste, and then paper-based processing, so as to produce edible paper-based food packaging as thin as paper; The other is to modify the edible non-toxic fiber, and then add some food additives to make an edible "paper", which can be used as food packaging. Nowadays, food packaged in "food paper" with beef flavor, chicken flavor, apple flavor and other flavors has appeared in the market, which is very popular with consumers, especially the application of edible paper food packaging in cold drink packaging, which plays a role in keeping cold and sanitation

the cereal film developed by Clemson University in the United States uses corn, soybean and wheat as raw materials, and the extracted plant protein is processed into a film, which can not only maintain moisture, but also has good moisture and oxygen resistance, and has certain antibacterial properties. It is suitable for the packaging of sausage and other foods, and can be used for poultry consumption or as fertilizer after use. Corn protein packaging film is suitable for the packaging of high fat foods with heavy oil and strong permeability, as well as the inner layer of fast food boxes and other oily foods. A company in Queensland, Australia, made an edible potato chip packaging, which can be eaten after people eat potatoes, without causing waste; Japan has developed edible wrapping paper made of deacetylated chitosan extracted from shell substances. The fast-food noodle seasoning packaged in this edible wrapping paper can be directly cooked in a hot pot. The use of edible packaging not only facilitates consumers, but also avoids the pollution of the environment by packaging waste, which is worthy of further research and promotion. Using chitosan edible packaging film as food packaging material solves the contradiction between food packaging waste and environmental protection, and can be used for the preservation of candy, preserved fruits, cakes, moon cakes, etc

edible "vegetable paper" food is very popular with consumers. The "vegetable paper" made by washing, peeling, cutting, cooking, cooling, drying and then processing vegetables has a bright appearance, which is very easy to induce customers' desire to buy. People can eat the food packed with this kind of "paper" without tearing the "wrapping paper". According to expert estimates, a piece of "vegetable paper" is equivalent to 250 grams of fresh vegetables after each experiment. Because edible paper packaging has the function that cannot be replaced by any other food packaging, it has many varieties and properties, and is widely applicable to the internal and external packaging of all kinds of raw and cooked food, and you are more valuable and convenient for customers. China is rich in resources and has a large population, and its food consumption ranks first in the world. Vigorously developing edible paper food packaging has been favored by many scientific research institutions, manufacturers and businesses, and has become a food packaging with great development prospects

4. Natural material packaging

mistletoe leaf is an important food packaging product in Japan, South Korea and other countries. The mistletoe leaf produced in Song county is of high quality and has gradually become the largest supplier in Japan, South Korea and other countries. As of January to early December 2005, Song county has sent 40000 boxes of high-quality Quercus leaves to Japan. There are many oak trees in Song County, so farmers are guided to engage in the processing and sales of Quercus leaves for export green food packaging. Half of the mistletoe market in Japan is occupied by Songxian

the bamboo forest area in China ranks first in the world. Bamboo packaging has the characteristics of wide resources, non-toxic, non polluting and recyclable, which is in line with the selection principle of green packaging materials. Bamboo characters have antibacterial properties. Their antibacterial properties make bamboo grow without moths and decay, without the use of any pesticides. Using bamboo materials to produce tableware or food packaging containers not only has no worries about the supply of raw materials, but also has no pollution in the process of production and use, which is conducive to environmental protection. At the same time, tableware or food packaging containers made of bamboo materials also retain the unique natural fragrance, simple tone and hardness and softness of bamboo. At present, the application methods mainly include original bamboo tubes (wine, tea, etc.), bamboo weaving appliances (fruit plates, fruit boxes), etc. It is of far-reaching significance to further expand the scope and field of bamboo packaging in China

5. New (4) environmental friendly material with too low oil viscosity

a new environmental friendly material is expected to come out in the United States in the near future. This new environmental protection packaging material is completely made of crushed strawberries, so it is very in line with environmental protection requirements. It is estimated that this new environmental protection material is likely to replace the traditional polyethylene plastic film and become the main material in the food packaging industry in the future

according to Tara McHugh, a food expert at the U.S. Department of agriculture, this newly developed food packaging film can also prevent the infiltration of oxygen, so as to achieve the effect of food preservation. Because the ingredients of this new material are mainly from inferior vegetables and fruits that are not suitable for eating, it is a material that can decompose naturally and meet the requirements of environmental protection

in the test, the packaging film made of this "magical" material can not only keep fresh, but also improve the taste of bananas, apples and other fruits. Mchuey said that in the near future, not only strawberries can be used as packaging materials, but also vegetables and fruits such as carrots and cauliflower can be used as packaging materials

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