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Japan successfully developed adjustable speed degradable plastic film
according to a report in the journal Industrial News on May 30, 2012, the research team led by Tomura Longfu of the Graduate School of Utsunomiya University in Japan cooperated with the Tochigi antibacterial research institute, by adjusting the proportion of fine calcium compounds in fan shells, which are the main components of degradable plastics, adjustable speed degradable agricultural plastic films have been successfully developed.
researchers use three kinds of degradable plastics as basic materials, and add calcium oxide and calcium hydroxide micropowder developed by antibacterial research institute, after using pepper and neem micropowder as modified materials to make plastic film, the test tube was added with water to decompose and the soil was buried. It was found that 30g of basic material and 3g of modified material were heated and mixed to make 0. For a 1mm thick film, the weight loss rate is about 25% to 40% 60 days after the decomposition test is started by adding water. Without adding modified materials, the weight loss rate is only 1% to 1. 8%. The experiment also found that the thin film added with calcium compound can promote the transition from acidic soil to neutral after decomposition in soil. At the same time, due to the addition of pepper and neem, the plastic film can also play a role in controlling pests and diseases.
The development of plastic film which can degrade and improve the soil according to the speed is the supporting agriculture project jointly launched by Zuli Bank, Tochigi county government and Nomura Securities in 2010, the aim is to solve the problem of waste treatment of plastic films commonly used in agricultural materials. The speed-adjustable degradable plastic buried in the soil not only protects the environment but also saves labor, and can solve the problem that agricultural plastic film can be degraded after being buried in the soil for 1 to 5 years.
the above research results were published at the annual meeting of the Japan Polymer Society held in Yokohama on the 31st.