On the development of the hottest green packaging

2022-08-11
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A brief discussion on the development of green packaging (Part 2)

4. Paper material

waste potatoes are mainly made of natural plant fibers, which will rot quickly in nature, will not cause environmental pollution, and can also be recycled for papermaking. In addition to the advantages of light weight, low price and shock resistance, pulp molded products also have the characteristics of good air permeability, and are widely used in the packaging of fragile, fragile and extrusion resistant articles

the application of paper packaging in green packaging

among the four packaging materials of paper, plastic, metal and glass, paper products have the fastest growth. Paper and plastic are the cheapest, with a wide range of raw materials. They are not as fragile as glass, nor as heavy as metal, and are easy to carry. Therefore, paper and plastic packaging are widely used in daily life. The International Health Organization and domestic environmental protection experts believe that the use of plastic packaging bags will be gradually banned in domestic and foreign markets, and environmental protection paper bags must be used for packaging. Paper products are easy to decay, which can not only recycle recycled paper or make plant fertilizer, but also reduce air pollution and purify the environment. The waste paper imitation plastic packaging material developed now has good permeability, softness, toughness and strength. The product is non-toxic, non polluting, rich in raw materials and low cost. It can be widely used in the packaging of various products. Therefore, compared with plastic, metal and glass, paper packaging will become one of the most promising green packaging materials

there are three ways to deal with the waste after the paper products are wrapped. One is to recycle and reuse paper or continue to make paper products; Second, natural degradation, as fertilizer; Third, it can be burned in case of emergency treatment, without producing toxic gases. The recycling of paper packaging waste has the following aspects: for example, the significance of wedge fixture: it can reduce the consumption of natural fiber raw materials and solve the problem of shortage of packaging resources; Greatly reduce production costs and achieve greater social and economic benefits with appropriate prices; To reduce packaging pollution and protect the environment, we should actively promote the recycling of paper packaging waste

environmental friendly ink - realize green printing

the ink in printing has a great impact on the environment, and when used in food packaging and printing, the ingredients harmful to human body will also directly endanger the health of consumers. The environmental protection problems related to ink mainly include:

1, the harmful ingredients in ink

2. Air pollution and odor caused by solvent volatilization in ink

3. Water pollution caused by arbitrary discharge of water for cleaning water-based ink

4. Water pollution caused by the discharge of offset printing fountain solution

5. Disposal of industrial wastes such as printing materials and ink containers

in order to fundamentally improve the impact of ink on the environment, we should start from the composition of ink, that is, try to use environmental friendly materials to prepare environmental friendly ink. At present, there are three types of environmental friendly inks:

1. Water based inks

the biggest difference between water-based inks and solvent based inks is that the solvent used in water-based inks is water rather than organic solvents. Solvent based inks are mostly volatile and dry, and toxic gases are released when volatilizing, polluting the surrounding environment and harmful to human body, while the solvents used in water-based inks are ethanol and water, which have little environmental pollution

2. UV ink

it is a light curing ink that can change from liquid to solid under the irradiation of a certain wavelength of ultraviolet light. It does not use solvents, drying speed is fast and complete, energy consumption is low, no solvent emissions, no need to prevent contamination between prints and take powder spraying measures, the printing machine and workshop environment is clean, no dust pollution

3. Water based UV ink

it is a new research direction in the field of UV ink at present. The viscosity of prepolymer in ordinary UV ink is generally large, which needs to be diluted by adding active diluent, and the active diluent currently used has varying degrees of toxicity. Therefore, while developing low viscosity and low toxicity active diluent, developing water-based UV ink and using ethanol as solvent will make the ink have good compatibility and adhesion

develop the market of environmental protection equipment in the packaging machinery industry

the packaging and food machinery industry is an emerging industry that provides equipment and technology for the packaging industry and the food industry. In the provision of equipment and technical services for the packaging industry, food industry deep processing and comprehensive utilization, the links with environmental protection related fields are increasingly extensive and close. The following is an introduction to several fields in the packaging machinery industry, which are currently the areas that China's environmental protection industry focuses on encouraging development, from which we can see the importance of developing environmental protection equipment and technology markets in the packaging machinery industry

1. Complete set of equipment for producing fully dried protein feed in alcohol tank. Its production process is mainly: tank liquid dehydration → drying → packaging dehydrated liquid → concentration

2. High concentration organic wastewater treatment technology and equipment. The direct discharge of these wastewater will cause the water body to stink and decay, affect the aquatic system and pollute the living environment

3. Treatment technology and equipment of straw pulp papermaking black liquor

4. The dart and ball drop impact test of packaging waste is the technology and equipment for impact treatment and comprehensive utilization of samples by dropping the falling body (including dart, weight and locking ring) or steel ball freely from a known height

5. Honeycomb composite board production technology and equipment. Honeycomb composite board can save materials and has the advantages of good rigidity, high strength, moisture resistance, recyclability and low cost. It has become an ideal substitute for "paper instead of wood" and "paper instead of plastic"

conclusion

as a complete and independent green system, green packaging should meet the following requirements: first, there is a set of green program design scheme, including the engineering content, implementation scheme, process route, etc. of each subsystem in the whole system; Second, it has a complete set of green production equipment and green environmental protection system; Third, it has a perfect green management system and scheme, including management and monitoring measures for all links

the assessment system of green packaging is the life cycle assessment of ISO 14040 products in the international environmental management system ISO 14000

life cycle assessment (LCA) can make a qualitative and quantitative unified assessment standard of environmental impact for each life stage of any complex system covering multiple fields, and give a comprehensive evaluation through specific system analysis and comparison, so as to verify whether a product meets the requirements of green products and international standards, and provide information support for product development, promotion and production

the "green revolution" of food packaging is an international cause and change. It will be the common pursuit of human life in the new century, and it will also be a common theme and important feature of the future development of the global food industry. This "green composite polyurethane adhesive" of the world-wide food packaging industry is widely used in packaging, printing, household appliances, building materials, transportation, new energy, safety protection and other important fields. ISO standards must be adopted

it can be predicted that "green revolution" will be an important theme of the global packaging industry in the new century, and it is also a significant feature of the development of the packaging industry in the new century. The 21st century will be a green world and a green packaging world. China's packaging industry must catch up with the world's "green wave" to meet the challenges after China's entry into the WTO and ensure that it takes the initiative in the world market in the 21st century

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