Tungsten oxide is a kind of infrared absorbing material nanoparticles that may be used for the preparation of thermal absorption agricultural plastic film such as agricultural land cover films, horticultural land cover films and greenhouse films. The infrared absorbing material nanoparticles are tungsten oxide nanoparticles and/or composite tungsten oxide nanoparticles.
The new agricultural film will form an infrared light absorbing layer, which will absorb infrared light and block a certain amount of ultraviolet light without affecting the passage of visible light. The working mechanism of the agricultural film is to warm the soil by absorbing infrared light that can be converted into heat, and at this time, the temperature of the atmosphere in the greenhouse is not raised.
How to apply the tungsten oxide powder to the surface of a film substrate? The resin containing the infrared absorbing material nanoparticles (tungsten oxide nanoparticles) can be uniformly applied to the surface of the film substrate. The coating method is not particularly limited, such as a bar coating method, a gravure printing method, a spray coating method, a dip coating method, cast coating method, spin coating method, roll coating method, screen printing method, blade coating method, and the like.
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