Ecology in the hottest packaging

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The new situation faced by China after its entry into WTO will bring new opportunities and challenges to the development of the packaging industry. With the acceleration of people's pace of life and the improvement of living standards, the requirements for commodity packaging are also higher and higher, and new products will emerge in large numbers. At the same time, the pace of product innovation will also be greatly accelerated, which also means that the packaging varieties of products are constantly changing

packaging and packaging materials with the development of science and technology, they are also constantly in the process of upgrading. Long before written history, human beings had the need to pack goods in their lives. However, in ancient times, human beings had a very limited grasp and application of material instructions, and the packaging used was almost entirely derived from natural raw materials. Before the invention of gunpowder, the packaging materials used by human beings could only be leaves, shells, bamboo tubes, animal skins, etc. Thanks to the invention and utilization of fire, people learned how to bake clay containers with fire, which led to the pottery industry. Later, people learned to use cotton, hemp and other plant fibers to spin and weave. Thousands of years ago, people began to use cloth. Cloth bags sewed with cloth are a major progress in the history of packaging materials

like cloth, paper is also one of the earliest artificial packaging materials in history. At first, paper was made from crushed mulberry bark and rags. Later, the papermaking technology of beating trees and plant fibers was invented. Before the invention of paper machine, papermaking remained in the manual stage. Only after the invention of papermaking, especially after cartons and corrugated boxes were used for packaging, did paper become the most widely used packaging material with large consumption

among the early packaging materials, there is also a kind of natural material - wood. People use wood to make wooden boxes, barrels and other packaging containers, and tropical red cedar to make high-grade cigarette boxes. Now, because forest resources are less and less, wood is expensive and difficult to form, wood has been replaced by paper and plastic and other materials

now, like polyethylene. Polypropylene, polyvinyl chloride, polystyrene, nylon, polyester and other plastics have been familiar to people. Many plastic films and packaging containers, although people can not accurately say their composition, as commodity packaging has been spread all over the world and entered every family. At the same time, packaging also consumes a lot of materials, and has caused a headache waste problem all over the world. With the development of economy and the improvement of consumption level. The garbage problem caused by product packaging waste has become one of the important sources of environmental pollution

in ancient times, in the East, people used bamboo tubes as drinking containers; In the west, people use skins to hold water. The former is taken from plants and the latter from animals, but in any case, they are taken from nature and also from nature, which will not cause any pollution to the natural environment. Nowadays, as the raw materials of packaging (2) are mostly plastic products for startup detection, although this material is cheap and easy to process, it is not easy to decompose, and some can't even decompose, so people use the method of burying garbage, but now this method is also facing the crisis of no land to bury, and it also causes pollution hazards to the environment; The relatively advanced incineration methods have problems such as huge cost of building incinerators and re pollution of the environment by waste gas and waste residue. Therefore, how to effectively reduce packaging waste, save resources and energy consumption, facilitate recycling, reduce environmental pollution, and protect the ecological environment has become a new concept that packaging designers all over the world must consider

in order to organically combine packaging with environmental ecology, we must carefully study and consider the whole life cycle of packaging and make an overall plan. Only by eliminating the moderate harm of packaging to the natural environment and human beings in the whole life cycle can we realize our original intention of developing green packaging, launch real green packaging, and achieve the purpose of sustainable development and benefit future generations

first consider the raw materials of packaging. Packaging materials can be roughly divided into materials that are easy to recycle, such as glass, metal materials, paper, wood, etc., and materials that are not easy to reuse and have serious environmental pollution, such as plastic. Plastic is a long chain of organic compounds with high molecular weight by combining many molecules together through chemical methods. They can be obtained from polymer materials existing in the natural world (such as fiber, rubber, protein) or through synthesis

in recent years, with the rapid development of China's plastic flexible packaging industry, it has also driven the progress of food, daily chemical and pharmaceutical industries, which in turn has further stimulated the market demand for plastic flexible packaging. With the continuous improvement of materials and processing technology, Gravure plastic flexible packaging is playing an increasingly important role in many fields. People can't live without shopping bags, commodity bags, garbage bags, refrigerator fresh-keeping bags, and plastic flexible packaging is also widely used in industrial products packaging, household commodity packaging, clothing packaging, and pharmaceutical packaging

entering the new century, the deepening of the major adjustment of the world economy and the transformation of sustainable development strategy are the general background of the world's industrial reform, as well as the background of environmental changes in the plastic flexible packaging industry. With the impact of the wave of environmental protection, consumers put forward higher and higher requirements for commodity packaging. Green packaging is the need of international environmental protection development trend, and also represents the development trend of packaging industry in various countries. It is one of the important contents to improve product market competitiveness and avoid new trade barriers. Accordingly, the greening of plastic flexible packaging has also become an important development trend

generally speaking, appropriate packaging that can be recycled, recycled or degraded, and does not cause public hazards to human body and the environment in the whole life cycle of the product is called green packaging. The most important meaning of green packaging is to protect the environment, but also has the significance of resource regeneration. Specifically, it should have the following meanings:

① implement packaging reduction. Green packaging should be the appropriate packaging with the least consumption under the condition of meeting the functions of protection, convenience and sales. To save resources and energy, while minimizing the amount of packaging waste

② it should be easy to reuse or recycle. Through repeated use, or through recycling waste, producing recycled products, burning and utilizing heat energy, composting and improving soil, the purpose of recycling can be achieved

③ waste can be degraded and corrupted. In order not to form permanent waste, non recyclable packaging waste should be able to decompose and decay, so as to achieve the goal of improving the soil

④ the material should be non-toxic and harmless to human body and organisms. Packaging materials should not contain toxic elements, halogens, heavy metals, or the content should be controlled below the relevant standards

⑤ in the whole life cycle of packaging products, environmental pollution should not be caused. That is, the whole life process of packaging products from raw material collection, material processing, product manufacturing, product use, waste recycling to final treatment should not cause public hazards to human body and environment

according to the above requirements of green packaging, the plastic flexible packaging industry is undergoing a profound green transformation in terms of processing equipment, technology and material selection

new progress of green packaging film

1 Edible film

edible packaging film is a film with porous complex structure formed by the interaction between different molecules with natural edible substances (such as polysaccharides, proteins, etc.) as raw materials. Such as chitosan edible packaging film, corn protein packaging film, modified cellulose edible packaging film and composite edible packaging film, edible film can be applied to the inner packaging of various instant foods, and it should have a huge market in the food industry

2. Degradable packaging film

mainly solves the contradiction that it is difficult to recycle waste and non degradable packaging materials. Buried underground will damage the soil structure, and incineration will produce toxic gases and cause air pollution

degradable plastic packaging film not only has the functions and characteristics of traditional plastics, but also can be split and degraded in the environment where the main motor source is turned off by nature through the microbial action of soil and water or the action of ultraviolet rays in the sun after the service life is completed, and finally re-enter the ecological environment and return to nature in the original form. Degradable plastics are generally divided into biodegradable plastics, photodegradable plastics and biological/photodegradable plastics. The varieties developed in China have covered photodegradation, photodegradation, photodegradation, high starch content biology. 1. People's neglect of Vocational and technical education. Although the corresponding circuit is relatively complex in today's society, the concept of respecting knowledge and talents has been recognized by the society. Degradation, high starch content biodegradation, high calcium carbonate filled photodegradation, full biodegradation and other categories; The application of plastic products in packaging has been widely used in ordinary packaging films, shrink films, shopping bags, garbage bags and so on, which has played a positive role in improving environmental quality

3. Water soluble plastic packaging film as a novel green packaging material, water soluble plastic packaging film is widely used in the packaging of various products in Europe, America, Japan and other countries, such as pesticides, fertilizers, pigments, dyes, detergents, water treatment agents, mineral additives, detergents, concrete additives, photographic chemicals and gardening care chemicals

after considering the packaging materials, we should also consider the recycling technology of packaging waste. At present, the recycling technology of packaging waste includes resource recycling and energy recycling. Mainly for plastic packaging waste. Resource recycling can be divided into recycling; The recycled plastic bottles and films are classified for thermal processing, re granulation, and mixed with new resins, that is, recycled by heating or mechanical methods; Through chemical reaction, macromolecules are cracked into small molecules for recovery, that is, chemical recovery. Energy recovery mainly refers to the recovery of heat energy generated during incineration. There is also a kind of biodegradable plastic development and research also belongs to the field of packaging waste laborious technology. Biodegradable plastics are plastic materials (including high molecular compounds and complexes) that can be completely decomposed into low molecular compounds under the action of natural microorganisms. Biodegradable technology can make plastic packaging waste re-enter the natural material cycle

packaging should be developed and the environment should be protected. Let every packaging and printing worker and packaging designer work together to "return the earth mother to a new face and preserve a beautiful home for future generations."

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