The most popular effective way to develop green fo

2022-07-26
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An effective way to develop green food packaging

green packaging is also known as environment-friendly packaging, which generally means that the packaging design can not only ensure the integrity of commodity performance, but also meet the requirements of environmental protection and resource regeneration. Green packaging conforms to the sustainable development strategy, so it is gradually becoming the mainstream direction of packaging design. Recently, food packaging safety problems have occurred frequently. Therefore, the green packaging branch of the Chinese society of 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

I. using green packaging materials

at present, many European and American enterprises pay attention to developing "green packaging materials" that meet environmental requirements. When selecting 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

as the main component of paper packaging is natural plant cellulose, which is easy to be decomposed by microorganisms, will decay quickly in nature, will not pollute the environment, reduce the cost of processing packaging waste, and the raw materials of paper packaging are rich and easy to obtain, so paper packaging has become an internationally popular "green packaging". Paper packaging is widely used to replace metal cans to hold various 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

in addition to the advantages of light weight, low price and shock resistance, pulp molded products 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, broken 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 it touches the ground. It is a kind of green synthetic resin. When it is 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. The incomplete biodegradable plastics mixed with starch and polyolefin plastics have been studied in China. The degradation principle of this kind of plastics is that the starch particles are eroded and consumed by fungi and bacteria first, so as to weaken the strength of the plastics. At the same time, the peroxide is formed through self oxidation in contact with some additive classes in the soil, which makes the molecular chains of polymers in the plastics break. They promote and complement each other. The bacteria consume starch, which increases the surface area of the plastics and is conducive to self oxidative degradation. Over and over again, 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

environment 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 packaged materials to make them become a whole, avoids friction and collision between them, and is more safe

3. Edible packaging

edible packaging means that when the packaging function is realized and it is about to become "waste", it will be transformed into an edible raw material. 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 called 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 carry out paper-based treatment, 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. In particular, the use of edible paper food packaging in cold drink packaging has played a role in keeping cold and sanitation

the cereal film developed by cremson University in the United States uses corn, soybean and wheat as raw materials, and the extracted plant protein is processed into a film. It 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. After use, it can be used for poultry or as fertilizer. The 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 snack boxes and other oily foods. A company in Queensland, Australia, has made an edible potato chip packaging. People can eat the packaging after eating potatoes without causing waste; Japan has developed edible packaging paper made of deacetylated chitosan extracted from shell materials. The fast-food noodle seasoning packaged with this edible packaging paper can be directly cooked in a hot pot. The use of edible packaging not only facilitates consumers, but also avoids the environmental pollution caused by packaging waste, which is worthy of further research and promotion. Chitosan edible packaging film is used as food packaging material to solve the contradiction between food packaging waste and environmental protection. It can be used for the preservation of candy, preserved fruit, cake, moon cake, etc

edible "vegetable paper" food is very popular with consumers. The "vegetable paper" made by washing, peeling, cutting, cooking, cooling, drying and processing vegetables has a bright appearance, which is very easy to induce customers' desire to buy. The food packed with this kind of "paper" can be eaten directly without tearing off the "wrapping paper". According to expert estimates, a piece of "vegetable paper" is equivalent to the nutritional value of 250 grams of fresh vegetables. Because the edible paper packaging can not be replaced by any other food packaging, it has many varieties and properties, and is very widely applicable to the internal and external packaging of various raw and cooked foods, and it is very convenient to use. China is rich in resources and has a large population. 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

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

China's bamboo forest area ranks first in the world. Bamboo packaging has the characteristics of wide resources, non-toxic, non polluting and recyclable, and conforms to the selection principle of green packaging materials. The bamboo character has its own antibacterial property, which makes the bamboo grow without moth and decay, and 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 tube (wine, tea, etc.), bamboo weaving equipment (fruit plate, fruit box), etc. It is of far-reaching significance to further expand the application scope and field of bamboo packaging in China, which will cause material tensile deformation and affect the printing results

5. New environmentally friendly materials

a new environmentally 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 for the leakage automatic power-off system and automatic breakpoint shutdown function in the food packaging industry in the future. 

according to Tara McHugh, a food expert of 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. Since the ingredients of this new material are mainly from the inferior vegetables and fruits that are not suitable for eating, it is a material that can be naturally decomposed and meets 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

II. Easy recycling:

1. Easy recycling

adopts the design of detachability, easy compression and folding. When designing the structure of the package, it should consider that it is removable, easy to compress and easy to fold, so as to make it easier to transport and recycle

90% of Japan's milk is sold in paper packages with creased lines, which is a good education. It can enable children to contact and use "green" products with environmental protection effects from urination. This kind of easily flattened packaging not only has low production cost, but also can reduce the occupied space, facilitate the transportation and recycling processing, and reduce the transportation cost. Yakutt health drink, the most common drink in Japan, uses a cup-shaped container with a tear bottom. After tearing the bottom, people can easily flatten the container for recycling

packaging design competition is held every year in Tokyo, Japan. An award-winning beverage packaging called ecopac is now widely used. The package consists of a 100% recycled cardboard box and a bag inside the box for holding drinks, which is called a bagincarton/box. The main purpose is to enable people to easily separate the paper box from the bag, which is easier to handle when sent to recycling processing. At present, most of the alcoholic beverages on the Japanese market use this kind of packaging

2. Easy to separate

try to use the same material and reduce the type of material. Try to use the same material for design, not to limit the diversity of packaging design, but mainly for the convenience of recycling. Recycled packaging, such as polyester bottles, can be regenerated by physical and chemical methods after recycling. The physical method refers to the direct and thorough purification and crushing without any pollutant residue. The treated plastic can be directly used to produce recycled packaging containers. The chemical method refers to crushing and washing the recovered PET bottle, and then using depolymerizer such as methanol water, ethylene glycol or diethylene glycol to act on the alkaline catalyst

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