The most popular green packaging eternal pursuit

2022-08-06
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Green packaging, eternal pursuit (Part 2)

3.2 from the aspects of reusability, regeneration, edible and degradability

3.2.1 reuse and regeneration

the reuse of packaging, such as promoting the use of glass bottles for beer, beverage, soy sauce, vinegar and so on. Sweden and other countries implement the reuse of PET beverage bottles and PC milk bottles for more than 20 times. Wellman company of the Netherlands and holmson company of the United States recycle 100% of PET containers. For example, after recycling, the polyester bottle can be regenerated in two ways. The physical method refers to the direct and thorough purification and crushing without any pollutant residue. The treated plastic can be directly used in the recycled packaging container; The chemical method refers to that after crushing and washing the recovered pet, the depolymerizer methanol, ethylene glycol or diethylene glycol is used to depolymerize the pet completely or partially into oligomers under the action of alkaline catalyst, and then the monomer or oligomer is re polymerized into regenerated PET resin packaging materials after purification

3.2.2 edible

for decades, the glutinous rice paper used in candy packaging and the corn baking cup used for ice cream packaging are all typical edible packaging. The more mature synthetic edible packaging film is the industrialized pullulan resin in the 1970s. It is a tasteless, odorless, amorphous white powder. It is a non-ionic, non reducing stable polysaccharide. Because it is a polydextrose composed of a-glucoside, it is easy to dissolve in water and can be used as viscous, neutral and non-ionic non gelatinized aqueous solution

its 5% - 10% aqueous solution can be made into a film with a thickness of 0.01mm after drying or hot pressing. It is transparent, colorless, odorless, non-toxic, tough, high oil resistance, and edible. It can be used for food packaging by 240mm technical institutions at all levels while carrying out measurement service guarantee. The gloss, strength and folding resistance of the film are better than those of the film made of high amylose

recently, researchers in Wuhan developed a new type of edible packaging film for inner packaging material. The product is made of dried sweet potato, potato, broken rice and other raw materials, which are transformed into polysaccharides by fermentation, and then the polysaccharides are extended into thin films. The membrane is a high molecular substance connected by glucose, which has the characteristics of edible, degradable, colorless and transparent, and good oxygen isolation. As a food packaging film, its right angle tear strength, mechanical strength and light transmittance can reach the standard of plastic packaging superior film. After the film is made into a bag, the milk powder and salad oil are filled without oil leakage, and can be eaten together with the milk powder in water

3.2.3 degradable

degradable material refers to a kind of plastic whose chemical structure changes at a specific time and in a specific environment. Degradable plastic packaging materials not only have the functions and characteristics of traditional plastics, but also can decompose and restore in the natural environment through the action of ultraviolet light in the sun or the action of microorganisms in soil and water after the service life is completed, and finally re-enter the ecological environment in a non-toxic form. Degradable plastics are mainly divided into synthetic photodegradable plastics, photodegradable plastics with photosensitizers, biodegradable plastics, and multifunctional degradable plastics compounded with a variety of degradable plastics. According to the environmental conditions of degradable plastics, they are also divided into photodegradable plastics, biodegradable plastics (fully biodegradable plastics, partially biodegradable plastics), chemically degradable plastics (oxygen degradable plastics, water degradable plastics), and composite degradable materials composed of the above three kinds of degradable plastics

3.2.4 paper materials

at present, many enterprises have considered using medium-sized and heavy corrugated boxes or white board boxes for packaging, and using various moisture-proof and fresh-keeping paper instead of plastic film for packaging. More than half of the plastic packaging in the United States has been replaced by new paper packaging. China's Shanghai Jiabao packaging company introduced advanced equipment to develop a pulp model. This product is made of natural plant fibers, such as reed pulp, bagasse pulp, wood pulp and other raw materials, through scientific formula and molding. This paper pulp model is an excellent technical strength to replace foam, which ensures that Jinmin spray free team can start with the most ideal product of tableware from the aspects of product structure, material design, color realization, mold design, etc

4 China actively develops green packaging

4.1 actively develops green packaging materials

packaging materials for export commodities can only be allowed to be imported into the importing country if they meet the regulations of the importing country, otherwise the customs of the importing country will not release them. Many countries restrict or impose mandatory supervision and management on the packaging materials of imported commodities in the form of laws and regulations. For example, the United States stipulates that straw shall not be used in the packaging of imported goods, otherwise they will be forcibly burned. The Ministry of agriculture and Fisheries of Xinxi Temple stipulates that the packaging of imported goods shall not be hay, straw, bamboo mats, etc. To this end, China has done a lot of work. First, avoid using toxic materials. Pigments, dyes, paints, etc. used on packaging containers or labels shall be made of raw materials that do not contain heavy metals as adhesives for bonding materials. In addition to containing no toxic or toxic components, they shall also be easy to decompose during separation

the second is to use recycled materials as much as possible. At present, most of the recyclable recycled materials used in the world are recycled paper, such as recycled cartons, molded pulp, peak pulp paperboard and paper tubes made from recycled waste paper. Third, actively develop plant packaging materials. Plants can basically continue to reproduce continuously, and the extensive use of plants generally will not cause harm to the environment, ecological balance and resource maintenance, which is favored by the international packaging market. Fourth, select single packaging materials. In this way, the material can be disassembled without the use of special tools, the recovery and separation time can be saved, and the difficulty of recovery and separation caused by the use of bonding method can be avoided

4.2 move closer to the world in terms of environmental labeling

iso14000 environmental management system international standard stipulates that any country can refuse to import products that do not meet the standard, so that products that do not meet the standard are excluded from international trade. China's environmental labeling system has fewer product categories, which is far from meeting the needs of foreign trade development. Only by following this international trend and adopting positive and effective means to catch up, can China's foreign trade interests be fundamentally protected. This standard system should be popularized at the same time as the typical guide. In addition, international environmental standards should also be studied as soon as possible. The international standards can be transformed into national standards through administrative and legislative procedures, which can be popularized and used throughout the country. Domestic supporting laws and regulations related to the international standards should also be formulated as soon as possible

4.3 the packaging design should highlight the connotation of environmental protection

the designer must investigate the specific requirements of the international market for environmental protection packaging, such as the regulations of the exporting country on environmental protection packaging, the depth of consumers' concept of environmental protection consumption, green organization activities, the development trend of environmental protection packaging and other effective measures to protect the jaw seat from wear and tear, so that these factors can be fully considered in the packaging design. In addition, the packaging design should also consider highlighting the signs of environmental protection marketing. This sign is different from the environmental signs. It can be designed by the manufacturer, supplier or wholesaler to indicate that a certain commodity has a specific environmental quality, so as to obtain the favor of consumers and achieve the purpose of expanding marketing

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