Tungsten oxide powder may be used for the preparation of thermal absorption agricultural plastic film. And the obtained agricultural plastic film can achieve the purpose of improving the temperature in the greenhouse or the shed in cold winter without improving the transparency of the reinforced film. This is because tungsten oxide nano particles added into the agricultural film have an excellent infrared absorbing effect, so that the ground temperature in the shed or greenhouse can be maintained at a temperature suitable for the growth of the crops. Among them, the tungsten oxide nano particles used are represented by the general formula WOX (2.72≤X≤3.0).
As you may have known, the color of the film is based on a special film developed by the roots of the vegetables. It is usually black and white, with a white film on the cultivation line and a black film between the lines. Therefore, the warming effect of the white film and the strip portion is good, so that the early stage of crop growth can be promoted although the black plastic film has poor warming effect. As the black film is far from the root of the crop, it does not affect the vegetable early maturity. In the hot summer, the temperature between the strings can be lowered, and the growth between root growths can be induced to prevent premature aging of the crop. Nonetheless, experts have found that the overall thermal insulation effect of this film is not as good as that of the agricultural film produced with the addition of tungsten oxide nanoparticles.
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