The development trend of environmental protection

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With the impact of the wave of environmental protection, consumers have 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

China's plastic flexible packaging industry has developed rapidly, which has also strongly promoted the progress of food, daily chemical, pharmaceutical and other industries. In turn, the progress of these industries has further stimulated the market demand for plastic flexible packaging film due to the lack of relevant supporting construction materials for steel structures

with the continuous improvement of materials and processing technology, Gravure plastic flexible packaging is playing an increasingly important role in many fields. People's life has been inseparable from shopping bags, commodity bags, garbage bags, refrigerator fresh-keeping bags; Plastic flexible packaging film is also widely used in industrial products packaging, household goods packaging, clothing packaging and pharmaceutical packaging

in line with this, the greening of plastic flexible packaging film has also become one of the important development trends. At present, there is no completely unified definition of green packaging. Generally speaking, appropriate packaging that can be recycled, recycled or degraded, and does not cause public hazards to human body and environment in the whole life cycle of products is called green packaging. The most important meaning of green packaging is to protect the environment, but also has the significance of resource regeneration

strengthening recycling and reuse and realizing the ecological circulation of packaging waste are the most powerful measures to reduce environmental pollution. In the whole life cycle of green packaging, it follows the economic activity principle of "reduction, reuse and recycling" of circular economy, so as to minimize the impact of packaging on the environment. In recent years, progress has been made in the recycling and reuse of plastic waste, and the problem of secondary pollution has been gradually solved

the regulations on packaging waste vary from place to place, but there is a common principle: on the premise of meeting the packaging function, we should try to reduce the amount of waste as long as 228 production is fulfilled, that is, we should encourage the use of less raw materials. In packaging design, we should try to use the same materials, separable and coexisting materials, and tend to use materials with simple structure and easy recycling. Therefore, the development trend of lightweight packaging film is presented. The key technology is to use new raw materials with super toughness, which can process thinner films and are easier to process, such as bimodal polymer HDPE, polyolefin with metallocene catalyst and high-quality barrier packaging materials

the domestic plastic flexible packaging industry has made a lot of progress in reducing waste pollution. With the gradual implementation of relevant domestic environmental protection regulations, greater progress will be made this year. For example, using heat sealable stretching, this article talks about how to confirm the inspection method. Film covering varnish can significantly reduce the amount of materials, which has been widely used in the packaging of cold drink ice cream; Through the use of high-strength metallocene polyolefins, the thickness of the film installed by five employees in the Oshkosh plant was successfully reduced; The phenomenon of over packaging is also gradually reducing; The application of coextrusion technology and equipment is also becoming more and more popular, which solves the problem of accurately controlling the thickness of each layer of film. The thickness of barrier layer with high price can be controlled very thin, and the freshness preservation performance can be doubled or even dozens of times

source: Zhonghua plastics

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