The hottest world market has set off an upsurge of

2022-08-09
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In recent years, many countries in the world have increased the deep processing, development and utilization of agricultural and sideline products in order to improve the comprehensive benefits of agriculture, and using agricultural and sideline products to produce environmental friendly packaging materials has become a research hotspot in the field of scientific research

at present, the research of using "biodegradable resin" to replace the existing packaging plastics is in full swing. Corn is a delicious and nutritious food. It is also widely used to make sweeteners and animal feed. With the progress of technology, scientists have found that using corn can also produce a variety of plastic products. For example, the "corn starch resin" successfully researched in Japan and Taiwan is a new type of green environmental protection material. This kind of resin is made from corn by processing and plasticizing. It can be used to make a variety of disposable products, such as water cups, plastic bags, commodity packaging, etc. According to experiments, this packaging material can be disposed of by burning, biochemical decomposition and insect eating, so as to avoid the harm of "white pollution". Nowadays, many large foreign companies are optimistic about this new environmental protection material. For example, Coca Cola used 500000 disposable cups at the Salt Lake City Winter Olympics, all made of corn plastic, which can disappear in the open air in only 40 days. Sony, a famous Japanese electrical appliance manufacturer, has been packaging MD discs with plastic paper made of corn for two years. The new packaging is as beautiful as the previous packaging

then, how does corn become plastic products? Visit the corn plastic plant of Cargill Dowell Co., Ltd. in Nebraska, USA, and you will see the whole process of turning corn into plastic. First, the sugar in corn is extracted, and then carbon, the basic material for making plastics and fibers, is extracted through fermentation and distillation, and then processed into a kind of fine particles called polylactide (PLA) with a diameter of only 4.57 mm. Finally, these small particles are pressed into packaging bags, foam plastic or tableware

Cargill Dowell said that corn, as one of the major agricultural products in the United States, is in sufficient supply, and it will not be a problem to extract 1billion pounds (454million tons) of polylactide every year in the next decade. This means that according to the color and shape of the corn production in the United States, it is certain that 1/10 of the ingredients of the abrasive particles will be made into plastic and fiber

according to the information recently disclosed by Taiwan, the number of plastic bags produced in Taiwan with each ton of corn resin is almost the same as that produced with plastic granules. According to the statistics of people in Taiwan's plastic industry, about 100 million tons of plastic products are produced worldwide every year, including 30million tons of disposable packaging materials. Solving the pollution caused by these materials will cost a lot of social costs. If corn resin can successfully replace some of the packaging plastics, it is estimated that there will be a market worth US $10billion every year. Perhaps seeing the bright future of this new material, DuPont, a chemical giant, has also joined the team of developing corn plastic. The company's research also received $19million in financial support from the U.S. Department of energy

although corn plastic is very beneficial to environmental protection, it also has a significant disadvantage of being expensive. For example, the price of corn plastic plates produced by North American Biological company is about 5% higher than that of traditional plastic plates, and the price of cups is 25% higher. However, Frederick hill, the president of the company, believes that within five years, as the demand for corn plastic increases, the production scale will be expanded and the cost will be reduced

food science experts from the U.S. Department of Agriculture recently announced that a new environmental friendly food packaging material is expected to come out. This new environmentally friendly packaging material is completely made of crushed strawberries, so it meets the requirements of environmental protection and may replace the traditional polyethylene plastic film as a new food packaging material. According to taramehugh, a food expert at the U.S. Department of agriculture, this newly developed food packaging material is no different from traditional products in terms of performance. The food packaging film made of it can also prevent the infiltration of oxygen, so as to achieve the effect of food preservation. Since the ingredients of this new material are mainly from inedible vegetables and fruits, it is a material that can be naturally decomposed and meets the requirements of environmental protection. In the test, the packaging film made of this "magical" material can not only keep fresh, but also improve the taste of bananas, apples and other fruits. Mchuey said that the efficiency of the work will be greatly improved. In the near future, not only strawberries can be used as packaging materials, but also vegetables and fruits such as carrots and cauliflower can be used as packaging materials. Undoubtedly, the successful application of this new packaging material and other similar materials will revolutionize the food packaging industry

kajirdo polymer Co., Ltd., a joint venture of kajirdo Chemical Co., Ltd. and kajirdo Chemical Co., Ltd. in Japan, has also achieved success in manufacturing packaging materials from natural plants (such as corn or wheat). This kind of packaging material is named as "polylactide natural product", which can be used to make paper cups, candy packaging paper, etc. it has good hand feel, Rotating Zigzag rod, large elasticity and stain resistance

it is reported that Cargill road polymer company first extracted non refined natural sugars dextrose from natural plants such as corn or wheat, then fermented dextrose into lactic acid, suggesting that calcification and wear play a part in the failure, then cooled lactic acid into a material called lactide, and finally melted lactide to form a long molecular chain of polymer called lactide. Using this kind of long molecular chain polylactide polymer can not only produce packaging materials, but also have low cost. It can decompose itself under hot and humid conditions and will not pollute the environment

in China, the development of new packaging materials has also achieved some results. For example, Hubei Wuhan Futuo environmental protection packaging material company and Wuhan Jinfeng environmental protection plastic company have mastered the technology of processing deteriorated grain into shockproof and decompression packaging materials, which not only found a way out for China's deteriorated grain, but also successfully explored the way to replace packaging materials. In addition, they can also process bagasse, wheat straw, waste newspapers and other wastes into various shockproof and decompression packaging materials such as golden yellow, orange, light gray and so on. The test shows that the performance of this material is not inferior to that of foamed plastic material. At present, we only need to do further research in weight reduction

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