Blue tungsten oxide nanopowder may be applied for preparing heat insulation agricultural film, which has the advantages of anti-corrosion, acid resistance, alkali resistance, corrosion resistance. Also, it is anti-fog and anti-aging with long service life. In addition, the thickness of the obtained agricultural film conforms to the national mandatory standard thickness of agricultural film --- 0.008mm. Although many of the agricultural films sold on the market are 0.004mm, they do not meet the requirements of agricultural film standard. If these unqualified agricultural films are used, not only will they not be able to keep warm, but also cause "white pollution" on farmland.
What should be noted is that the agricultural film of thickness of 0.008mm is not always the “green film”. In fact, the 0.008mm agricultural film is only easier to recycle than the 0.004mm agricultural film. The real environmentally friendly agricultural film refers to the biodegradable bio-film. Which this kind of agricultural film has not been promoted due to problems such as high production cost.
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http://www.tungsten-powder.com/Blue-Tungsten-Oxide.html