Chemical degradation plastics in detail

Water soluble plastic packaging film as a novel green packaging material, in Europe and the United States, Japan and other countries are widely used in all kinds of product packaging, such as pesticides, fertilizers, paints, dyes, detergents, water treatment agent, mineral additives, detergent, concrete additive, photography with chemical reagents and chemical reagents of gardening nursing. Its main features are: the degradation thoroughly, is the product of CO2 and H2O, can thoroughly solve the problem of packaging waste treatment; Safe and convenient to use, avoid direct contact with the user is packaging, packaging can be used in hazardous to the human body; Mechanics performance is good, and can be heat sealing and heat sealing strength is higher; With anti-fake function, extend the life cycle of products. The main raw material of water soluble packaging film is low alcoholysis degree of pva, using pva film, water soluble and degradability, adding various additives, such as surface active agent, plasticizer, anti-sticking agent, etc. In terms of degradation mechanism, the polyvinyl alcohol with water and biological degradation properties, gel first dissolve in water to form liquid infiltration in the soil, increase soil mass of viscosity, permeability and water retention, especially suitable for sandy soil reconstruction. PVA can be separated in the soil in the soil of a single-celled bacteria ( 假单胞菌) The strain of decomposition. At least two bacterial symbiotic system composed of biodegradable poly (vinyl alcohol) : a kind of bacteria is the activity of poly (vinyl alcohol) bacteria, and the other is a substance required to produce PVA active bacteria bacterium. Secondary alcohol oxidation reaction of enzyme catalysis polyvinyl alcohol and hydrolytic enzyme cut off the main chain of the oxidized PVA, further degradation, eventually biodegradable to CO2 and H2O. Water soluble film has good packaging and environmental characteristic, therefore has wide attention by the developed countries, there is a very good application prospects. Such as Japan, the United States, France, has large quantities of production and sales of such products, like America's W. T. P and C company. C。 我。 P company, French GREENSOL and synthetic chemistry companies, such as Japan, the user is also some well-known large companies, such as Bayet ( Bayer) 、Henkel( Henkel). 、Shell( Shell) 、Agr. Eva( Edgar f) Such as large companies have begun using water-soluble film packaging their products. Zhuzhou institute of technology and guangdong zhaoqing the hing packaging materials companies in China with the support of the China national packaging corporation of science and technology, jointly developed the water-soluble film has passed the provincial or ministerial appraisal and production equipment, has been put into production, the product is to the market.