
Tungsten oxide is a nano heat insulation material that may be used in the preparation of heat insulation agricultural thin film. The new nano heat-insulation agricultural film comprises a transparent base film and a transparent resin layer, wherein the resin layer contains nano grain size tungsten oxide material. And the nano heat insulation material has a blocking ratio of 85% or more of 780nm wavelength of infrared rays, 60% of 380nm ultraviolet rays and more than 95% of transmittance of…