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 visible light.
Wherein, the base film comprises the following parts by weight:
1.0 Modified starch 40 parts, 11 parts of ethylene-ethyl acetate resin, 6 parts of polyethylene resin, 6 parts of light stabilizer, 5 parts of antioxidant, 5 parts of white oil, 68 parts of water; or
2.0 Modified starch 44 parts, 9 parts of ethylene-ethyl acetate resin, 6 parts of polyethylene resin, 6 parts of light stabilizer, 5 parts of antioxidant, 5 parts of white oil and 75 parts of water.
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