Discussion on the Development Countermeasures and Planning of China's Green Packaging Industry (III)

2.2.2.2 Plastic Packaging a. Research and Development of Degradable Plastics. The compound degradable material developed by our country now is the addition of starch or other additives to the plastic resin as a culture agent of microorganisms to achieve the degradation effect, and is mostly used for plastic packaging bags and food packaging;
The use of pure starch as raw material, the use of expansion process, can be made of degradable tableware; the other is the use of pure starch mixed with 50% rice husk, manufacturing molded tableware, the cost is slightly higher than the previous one, but the high temperature performance is good.
To meet the environmental requirements of landfills (filling and burying), it is necessary to actively study the combination of light and biological environmental degradation plastics, which can reduce or inhibit the environmental pollution of plastic packaging waste.
The development of fully biodegradable plastics has received great attention both at home and abroad. With the use of microbiological technology and irradiation technology, fully degradable plastics can be produced, and foreign crystals have been put on the market. China has already developed and should support research and development in order to form industrial production before 2005;
b. Water-soluble packaging olfactory production technology. Water-soluble FVA bags can be used for the packaging of water-soluble pesticides in one dose. They can be dissolved in water together with pesticides, eliminating the harmful operation of contact with pesticides. They can also be used in the packaging of hospital-infected clothing, and can be directly put into the washing box. Can also be used for the packaging of one dose of detergent;
c. Waste PET (PET) packaging recycling (chemical method). The annual output of polyester bottles in China is 5 billion, which will cause great pressure and impact on the environment after consumption. Recycling waste polyester packaging and reuse can save resources and reduce environmental pollution. The recovered diol esters, unsaturated polyester resins or polyurethanes are widely used engineering materials and packaging materials, with significant social and economic benefits. At present, there are many ways to recycle waste polyester, and the use of chemical recovery methods has broad prospects;
d. Development and application of waste plastic oil technology. The waste plastics oiling technology uses high-performance catalysts, after a certain pressure and temperature, depolymerizes the high-density polyethylene or polypropylene plastics, and connects the hydrocarbon elements in the plastic particles into a long-chain hydrocarbon compound. Liquid petroleum. It can produce gasoline fuel that meets the national standards and its oil production rate can reach over 75%. If the necessary equipment is installed, liquefied gas and carbon black can also be recycled, which is more efficient. By changing the catalyst, it is also possible to produce chemical products such as toluene, xylene and pure benzene;
e. Waste plastics produce high-strength plastic-wood composite materials technology. This technology is a new type of composite material made of thermoplastic resin, added with wood cellulose (wheat stalk, rice stalk, rice husk, etc.), and a variety of chemical additives. The molding method of this material includes molding, injection, vacuum molding, and the like. Its products have dual properties of wood and plastics, and are widely used;
f. Polystyrene foam recycling technology. Renewable transparent polystyrene replaces new materials and requires low or colored products. The technology has less investment in production equipment and is easy to form production capacity;
e. Coated fertilizers are produced from waste plastics. Using waste packaging plastics (including PE, PP, PVC, and PS) and filling blends (including a variety of urban and rural wastes such as activated carbon waste, crushed animal and plant waste, weathered coal, humic acid, etc.) to form a fertilizer capsule. The cost of coated fertilizer is only RMB 300/ton more than that of compound fertilizer. It is a project that changes “white pollution” to “green fertilizer” and can absorb a large amount of packaging waste plastic.
2.2.2.3 Metal Packings We must research and develop metal stretch cans suitable for China's national conditions. From the selection of raw materials to the development of production processes, we must conduct a series of research and development from the manufacture of technical equipment to the formulation of standards. Improve the recovery rate of aluminum easy-open two-piece cans. To increase the recycling rate of 200 liters of old steel drums. If 200 liters are regenerated each year, the daily steel drums will increase from the current 1 million to 5 million, which will save 115,000 tons of steel and 460 million yuan in funds. Reduce environmental pollution.
Actively develop the use of thin steel drums, use o. 8 ~ lmm thin steel plate production 200 liters steel barrel, disposable, easy to recycle.
2.2.2.4 Glass packaging High-strength lightweight glass packaging is the main direction of development.
2.2.3 The task and goal of technology development.
The task of developing science and technology for green packaging industry is very heavy. To increase investment in science and technology development, the government should provide support in terms of policies and funds. The listed development priorities should be planned. Before 2010, there was a major breakthrough and investment in industrial production. The application of new green packaging crystals is an important part of technology development research.
Before 2010, the recycling rate of all packaging products should be greater than 80%. (To be continued)