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Main means of green packaging

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green packaging design generally follows the so-called 3R principle, that is, recycle (reduce packaging), reuse (reuse packaging), recycle (recycle packaging, burial and treatment)
start with packaging materials
1. Re used and recycled packaging materials
the earth and forest are the basis of human ecological balance. The disaster brought to human society by wanton logging of wood is immeasurable. In view of this situation, people can consider using reusable and recycled packaging materials, such as beer, beverage, soy sauce, vinegar and so on. Glass bottles are used repeatedly, and polyester bottles can be regenerated by some methods after recycling. Recycled packaging can be regenerated by two methods. The physical method refers to the direct and thorough purification and crushing without any pollutant residue. The treated plastic can be directly used for recycled packaging containers. Chemical method refers to crushing and washing the recovered pet (polyester film), depolymerizing all or part of pet into monomers under the action of catalyst, and then re polymerizing the monomers into recycled packaging materials after purification. The reuse and regeneration of packaging materials only prolong the service life of polymer materials such as plastics as packaging materials. When their service life is reached, they still face the problems of waste treatment and environmental pollution
2. Edible packaging materials
edible packaging film
this is a good way to solve the contradiction between food packaging waste and environmental protection. In the design of some food packaging, an edible packaging film that does not affect the original flavor of the packed food can be made. By the 21st century, countries around the world have developed many kinds. For example, a company in Australia has developed an edible potato chip packaging, which can be eaten after people eat potato chips. Another British company has made an edible fruit and vegetable preservative. It is a translucent emulsion made from sugar, starch, fatty acids and polyester. It can be sprayed, brushed or impregnated to cover the surface of fruits and vegetables such as apples, oranges, watermelons, bananas and tomatoes. Because this preservative forms a sealing film on the surface of the fruit, it can prevent oxygen from entering the interior of the fruit and vegetable, so as to prolong the ripening process and keep fresh. The fresh-keeping period of the fruit and vegetable coated with this preservative can be more than 200 days. Best of all, this preservative can also be eaten with fruits and vegetables
people are familiar with the glutinous rice paper used in candy packaging and the corn baking packaging cup for ice cream packaging, which are typical edible packaging. The more mature synthetic edible packaging films are transparent, colorless, odorless, non-toxic, tough and high oil resistance films, which can be eaten and used as food packaging. Its luster, strength and folding resistance are relatively good
【 Edible Preservative Film 】
as early as the 12th ~ 13th century, China has used wax to coat oranges and lemons to delay their dehydration and weight loss. Extend the shelf life of fruits and vegetables. In the 21st century, with the development of science and technology, the edible fresh-keeping film commonly used in the 21st century has developed into one with multiple functional properties, obvious waterproof and certain optional permeability. Therefore, it has broad application prospects in the food industry, especially in the fresh-keeping of fruits and vegetables
3. Degradable material
degradable material refers to a plastic whose chemical structure changes in a specific environment that causes performance loss within a specific time. Degradable plastic packaging materials not only have the functions and characteristics of traditional plastics, but also can be split, degraded and reduced in the natural environment through the action of ultraviolet light in the sun or microorganisms in soil and water after completing the service life, and finally re-enter the ecological environment and return to nature in a non-toxic form. For example, a French dairy company mixes the substances extracted from sugar beet with minerals to make an ecological packaging box
4. Paper material
the raw material of paper is mainly natural plant fiber, which will decay quickly in nature and will not pollute the environment. It can also be recycled and papermaking. Therefore, many large international companies use recycled paper for the production of annual reports and publicity materials, and use recycled paper to make stationery and stationery, so as to reflect their green purpose of paying attention to the environment and establish a good corporate image. Paper materials are also used for pulp injection parts, composite materials, building materials and other purposes. In addition to the advantages of light weight, low price and shockproof, pulp molded products also have good air permeability, which is conducive to the preservation of fresh goods. In the international commodity circulation, they are widely used in the turnover packaging of fragile, broken and extruded goods such as eggs, fruits and glass products
in addition, packaging designers can use some natural materials to improve the packaging design. For example, the bowl shaped container designed with coconut shell can be cleverly designed into food packaging. Reduce the type and quantity of packaging materials, and the type of product packaging should be as few as possible. General packaging designers use different kinds of materials as much as possible in order to meet the appearance needs of products, attract more and more consumers and improve the grade of products. There are many parts of some packaging. If one component can be used and a single type of material can be used, try to use one, which is more conducive to the recycling of products. As a packaging designer, I have the responsibility and obligation to make sufficient estimates of the possible social effects and ecological and environmental protection effects of the designed packaging. The European packaging and Packaging Waste Directive stipulates that the content level of heavy metals (lead, mercury and aluminum, etc.) and the content of lead should be less than 100ppm. All countries should stipulate in the form of legislation to prohibit the use or reduction of certain packaging materials containing harmful ingredients such as lead, mercury or aluminum, and to stipulate heavy metal content. The disposable foam plastic lunch boxes popular in the market can not only be recycled, but also buried in underground for a long period of time, so it is not easy to decompose, incineration and pollution to the environment. Therefore, it is forbidden to use. Br> use packaging design patterns and colors to arouse people’s awareness of environmental protection
the patterns and colors of product packaging seem to have little to do with environmental protection, but it directly affects consumers’ visual perception. If some environmental protection signs and environmental protection pictures are deliberately attached to the packaging, it will stimulate consumers’ brains and remind consumers not to throw away packaging waste. The pictures on some packages often use beautiful landscape pictures, which can not only give people visual enjoyment, but also enhance consumers’ awareness of environmental protection

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