The latest polymers will make waste plastics disap

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New polymers will make waste plastics disappear

in Germany, it is not easy to put garbage into the dustbin. In order to improve recycling efficiency and avoid waste, garbage is not all put into a garbage bin with mechanical functions added through appropriate heat treatment process, but into garbage bins with different functions: many families put waste paper and paperboard into blue garbage bins, packaging made of plastic, aluminum or tinned iron into yellow garbage bins, organic waste into brown garbage bins, and other waste into gray garbage bins. Waste recycling has achieved remarkable success, and almost half of domestic waste in Germany has been recycled

however, in the near future, not only vegetable waste, but also plastic film used for food packaging can be turned into mixed fertilizer. Researchers from BASF, the world's largest chemical company, have developed the world's first food packaging bag that can be used as compost. This packaging bag is made of fully biodegradable plastic material ecoflex . Films and bags made of ecoflex can rot with organic waste. In the mixed fertilizer manufacturing system, microorganisms decompose plastic waste, leaving only natural residues such as sewage, carbon dioxide and biomass. Ecoflex has become a best-selling product at present: in 2001, BASF's ecoflex sales showed a double-digit growth

ecoflex is a milestone product launched by BASF for sustainable development. Every time BASF researchers develop innovative products, they focus on how to reduce the burden of environment and resources. As a company listed on the Dow Jones Sustainability world index, BASF is one of the excellent multinational companies that unswervingly regard the concept of sustainable development as part of their corporate strategy

at present, 90% of the annual output of ecoflex is used in the combination of plastic materials and renewable raw materials. It is usually used for food packaging, such as cardboard boxes or containers made of starch. Ecoflex coating effectively solves the problem of oil penetration of natural materials, and produces hygienic packaging that can be completely degraded by ouyangming. This polymer can even make the packaging made of renewable raw materials more tough and not easy to break or crack. A kind of high-performance food packaging, for example, was born here. It is suitable for all occasions, from coffee cups to hamburger boxes. Due to the waterproof and oil-proof properties of ecoflex materials, they can be used to produce dustbin liners, food bags and sealing films. Plastic waste after use can be treated together with organic waste. Therefore, there is no need to adjust the existing waste treatment facilities in each town, because ecoflex decomposes almost as fast as vegetable starch in a normal mixed fertilizer system. In agriculture, the plastic film covered by farmers to protect crops from frost does not need to be taken back hard. The agricultural film made of ecoflex only needs to be ploughed into the soil, and it will naturally decompose in the soil. Moreover, after verification, because ecoflex film has many similar properties with traditional plastic polyethylene (PE), this new synthetic material can use the same processing system as PE

during the production of ecoflex, BASF chemists combined acetic acid, butanediol and terephthalic acid to form a new polymer. The molecular chain length of the above components and their branching and interconnection structures determine the properties of this biodegradable plastic. Whether it is the manufacture of flexible films or food containers, these products can be biodegradable. In fact, these components derived from chemical products have no impact on the biodegradability of ecoflex. A large number of common microorganisms in soil and mixed fertilizers can decompose them. Natural bacteria and enzymes in fungi can also decompose them. Therefore, it is necessary to keep the core low? After months of treatment, this synthetic material will only have water, carbon dioxide and biomass left. Like naturally occurring polymers such as starch and cellulose, ecoflex has returned to the natural environment

comprehensive tests have proved that ecoflex meets the strict requirements of German dinv54900: it can be completely biodegradable and suitable for the manufacture of mixed fertilizers. The mixed fertilizer is of high quality, and the polymer and its degradation products have no toxic effect on plants, and the degradation intermediate has no adverse effect on organic matter in water. This innovative plastic has not only passed the certification in Germany, but also its spectrum is 10 minutes wide, which meets all the requirements of the European standard EN13432 for manufacturing mixed fertilizer materials. It even meets every requirement of greenpla for biodegradable materials

due to its excellent performance in biodegradability testing, ecoflex is very different from degradable polyethylene (such as widely used in food packaging in China). These polyethylene products may be cheaper than e-coflex, but they cannot completely return to the natural cycle and do not meet the international standard of biodegradability. Polyethylene can be degraded but cannot be biodegraded in the corresponding time period of the mixed fertilizer manufacturing process. Scientific research further shows that a large number of polyethylene particles will affect the manufacturing process of mixed fertilizers

the application of biodegradable materials goes far beyond the scope of waste treatment, and its series of new materials have a variety of potential uses. "In the future, degradable materials will be used in many fields where other materials are currently used," said Dr uwewitt, a researcher at BASF Because of their performance and price, they will be particularly suitable for attractive emerging ecological markets. Ecoflex will gradually replace the materials currently used in applications that are extremely beneficial to consumers and the environment

source: Guangdong packaging

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