issues that must be resolved for the sustainable development of the packaging industry

日期:2019/11/30 9:12:13 / 阅读: / 来源:本站

Third, several issues that must be resolved for the sustainable development of the packaging industry
Otherwise, it will prevent the possibility of further development. It should be pointed out that there are currently some misunderstandings in our country. These misunderstandings may lead the plastic packaging industry to the road. One kind of misunderstanding is "placing paper with plastic" In other words, we use paper that is easy to weather and disappear on the packaging materials instead of plastics that are not easy to age and decompose. We also say that compared with plastic, there is a big difference in packaging performance. Many plastics have Performance is not available in packaging paper, for example: good barrier properties, high mechanical strength, easy moldability, easy heat-sealing bag making, etc. According to environmental protection requirements, paper damages the environment far more than plastic . The paper industry needs a large number of felling trees as raw materials for pulp. Many chemicals are used in the papermaking process. Even if these chemicals are purified, many of them are discharged with the water, dyeing the environment, and replacing paper with paper is human society. One of its advances is its progress in protecting the forest and reducing pollution, not to mention that the energy consumption required for papermaking is greater than that of plastic. To this end, it is a retrograde and wrong slogan to use paper instead of plastic. Currently used paper cups, Paper containers need to be coated with plastic to improve their barrier properties and heat-sealable formability. It can be said that neither paper or metal packaging containers are inseparable from plastic. The interior of metal tins is alkyd resin. Can I leave synthetic resin. Plastic as a packaging material is not only a popular packaging material today, but also another issue that needs clarification is the understanding of degradable plastics. Degradable plastic is a kind of plastic developed abroad, and its suitability will continue to be one of our main packaging materials in the future. This is undoubted.

       In situations where it is not possible to collect, collect or classify it, it cannot replace all plastics for daily use, and degradation of plastic is a waste of resources. It shortens the life of plastic to achieve rapid natural aging and decomposition. I don't think it is our only magic weapon to deal with white pollution, and it is not suitable for vigorous promotion, because from the rational application of the total resources, plastic packaging waste, like urban waste, there are three treatment methods, the first is deep Buried method, this way
Is a waste
       It was once the main waste treatment method in the United States. It was an open field, and a large pit was excavated. Then, a reinforced concrete was poured at the bottom of the pit and around the pit, and the compressed municipal garbage was put into a cement pit. In the middle, a ventilation pipe is erected at a certain distance to guide the various gases generated in the garbage to the pit to prevent spontaneous combustion or explosion. Obviously, this method has a large investment and a large amount of land, and the waste has not been fully utilized. It is the most foolish original method. It is rarely used in the United States and is rarely used in other countries, especially in Europe where land resources are tight. Abandon this method of garbage disposal from the beginning. The second method is the burning method. After the municipal waste is sorted out by the sorting plant, it can be burned and then burned into the Chu furnace. The burned heat is used for power generation and urban residents' hot water supply. The generated gas is recovered into various useful chemical industrial products through a complex and huge recovery device and made into a product supply market. Burned solid waste, used as fertilizer
It is reported that the entire firing plant only emits chlorine gas when used as an admixture, etc. It is reported that the mass of the waste pellets can be greater than 67kJ / kg, which is equivalent to the calorific value of first-class coal. In 1990, Japan ’s per capita annual plastic consumption reached 89 kg, and the total plastic output reached 11.95 million tons. Japan has 1,899 burners, and the burn-down ratio reached 72% in 1986, and all have gas purification and recovery devices. Clean and clear.

作者:admin


Phone now 13986280012 OR More contact information →

Go To Top