What is a water-soluble plastic packing film?
On the degradation mechanism of polyvinyl alcohol, has water and biological degradation characteristics of two kinds of first, soluble in water to form a gel into the soil, increase soil mass viscosity and permeability and water retention, especially suitable for sand transformation. In the soil of PVA by soil bacteria isolated from a single cell (Pseudomonas - strain) decomposition. At least two kinds of system composed of commensal bacteria can degrade polyvinyl alcohol: an active bacteria bacteria is polyvinyl alcohol, the other one is to produce PVA active bacteria substances required for bacteria. The oxidation of secondary alcohols catalyzed by polyvinyl alcohol, then enzymatic hydrolysis by cutting the main chain of PVA, further oxidation degradation, eventually for CO2 and H2O. degradation
Water soluble plastic packaging film as a new green packaging materials. The main raw material is low alcoholysis of polyvinyl alcohol film, water solubility and degradability by polyvinyl alcohol, adding various additives, such as surfactants, plasticizers, anti adhesive agent. Water soluble film products belong to green packaging materials and in Europe, Japan and other countries have been recognized by the national environmental protection department. At present, the main domestic and foreign biological oxygen demand (BOD) and chemical oxygen demand (COD) as an environmental indicator. The Japanese authorities determination of PVA biological oxygen demand (BOD) is much smaller than the starch, the United States Air Products to PVA biological products Airvol, after 5 days degradation can be measured the amount of BOD is lower than the initial volume of BOD 1%. through the biological experiment proved that polyvinyl alcohol are non-toxic, does not prevent the growth of microorganisms, has no influence on wastewater treatment and environmental health The microbial decomposition tests also showed that the PVA was almost completely decomposed, resulting in a very low COD
