Nano grain size blue tungsten oxide may be applied for producing heat insulation agricultural film. Although polyethylene film and polyester film have been widely used as greenhouse membranes, and they can also play a role in improving ground temperature, maintaining soil moisture, promoting seed germination, rapid growth of seedlings, and inhibiting weed growth. However, the heat insulation effect of these agricultural films is not very satisfactory. And this will cause problems such as wilting and scorching of plants in the hot summer, which will affect "selling" and harm the interests of the operators.
Therefore, some experts mainly focus on improving the thermal insulation properties of agricultural films. They found that if nano grain size blue tungsten oxide powder with an excellent heat insulating effect is added to a resin layer for preparing an agricultural film, the obtained agricultural film will have excellent heat insulating properties without affecting the visible light passing through the film.
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http://www.tungsten-powder.com/Blue-Tungsten-Oxide.html