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Biodegradable plastic packaging can replace traditional plastic packaging Industry trends-

by:Supouches Packaging     2022-08-09
Biodegradable packaging materials can replace plastic packaging materials. Faced with the increasingly severe environmental pollution of plastic products, the development of biodegradable and non-polluting materials and the search for better alternatives to plastic products have become the focus of scientific research by industry professionals. As a class of naturally biodegradable materials, microbial biodegradable materials play a unique role in energy conservation and environmental protection.“White pollution”reasonable and effective way to deal with it. At this stage, microbial biodegradable plastic packaging materials have the characteristics of easy biodegradation and wide source of raw materials, which can reasonably and effectively alleviate environmental pollution, and have been pointed out as a means to deal with environmental pollution of plastic products. In recent years, some degradable plastics and biological materials have been successively developed around the world, which has greatly promoted the development and growth of the plastic packaging material industry in various countries around the world. Degradable plastics (mainly adding additives such as starch, cellulose, photosensitizers, biodegradants, etc. to plastic products) have defects such as consuming a large number of food crops and failing to remove visual pollution, and the emergence of micro-materials in plastic products makes them more The biodegradation efficiency in the soil environment is relatively slow, and it cannot be recycled and reused in time. Therefore, the application prospects of degradable plastics are limited, and the most promising research and development potential is microbial plastic packaging materials. So, what are the raw materials of microbial biodegradable materials? Some results have been achieved: banana waste, avocado seeds, tomato peel, cactus, bean curd residue, corn starch, etc. Tofu dregs are usually processed from soybeans to make tofu and soy milk, and the remaining residue is usually discarded. However, if such residues are fermented, when microbes devour their nutrients, cellulose can be left behind and made into plastic packaging. It is understood that a professor of a foreign university has invented a kind of biodegradable food packaging material. The author learned that the plastic packaging bag is made of cellulose, extracted from the waste produced by soybean products, and the plastic packaging bag is more energy-saving and environmentally friendly. It not only reduces plastic waste, but also reduces food waste. Usually, some energy-saving and environmentally friendly plastic packaging bags made of microorganisms can be completely biodegraded at an ambient temperature of more than 50 °C for a long time. If the abandoned bioplastic does not have a suitable ambient temperature, it cannot be biodegraded, which is likely to exacerbate the environmental pollution problem of plastic products. However, the use of bean curd dregs extract to make energy-saving and environmentally friendly plastic packaging bags does not require ambient temperature conditions, and can biodegrade by itself within 1 month, which not only reduces plastic product waste, but also reduces food waste, achieving a win-win situation. With the development and expansion of the global economy and the continuous progress of technological innovation, corn starch has opened up many new fields for the people's demand for corn. The author learned that a company in a certain province developed and processed various plastic products such as plastic straws, tableware, placemats, etc., which were mainly made of corn starch. Microbial plastic films featuring biodegradable resins made from corn starch and other plant-derived compounds achieve biodegradation in 95 to 240 days, reducing environmental pollution. Banana waste It is understood that a foreign team has developed an experimental new recycling process. Part of the abandoned pseudostem of bananas is recycled, dried in a low-temperature oven, and then ground into fine powder. The powder then extracts a class of material called nanocellulose, which is used to make biodegradable packaging. The resulting packaging has the same consistency as parchment paper used in baking, can be used in products such as shopping bags and food packaging, and does not leach any harmful compounds into the food. It is also biodegradable when it is abandoned. Arcot said:“The pseudostem is 95% water, with the remaining about 5% solid chemicals. We cut it into pieces, dry it in a drying oven at very low ambient temperature, and then grind it to a very fine powder. We take these powders chemically and wash them. Nanocellulose, a class of high-value materials with universal applications, was extracted. Plastic packaging bags are one of our most interesting applications, especially single-use food packaging.”About 8 billion kilograms of plastic products from cactus enter the ocean every year. With the decomposition of plastic products in the ocean and landfills, they enter the food chain system. Now people may eat more than 50,000 pieces of microplastic food every year. A university scientific researcher has created a class of biodegradable plastic products by mixing cactus leaves with other natural materials. It is a kind of non-toxic and biodegradable product, the biodegradation time is about 1 month, and it can even be eaten, which will help to deal with the global problem of plastic products. Because plastic products have the characteristics of airtightness, watertightness, acid and alkali resistance, light weight, high strength, durability, high quality and low price, etc., they have become the most common type of plastic flexible packaging materials. In addition to manufacturing enterprises, retailers, farmers' wholesale markets and even takeaway fast food stalls in the streets and alleys all use plastic packaging bags and foam plastic boxes as the main packaging materials. About half of these products are discarded in the natural environment and usually take two hundred years to biodegrade.
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