Nanometer self-assembly thermal insulation agricultural film

Abstract

The invention relates to a nanometer self-assembly thermal insulation agricultural film which comprises a transparent base film and a transparent resin layer. The resin layer contains nanometer thermal insulation materials, wherein the separation rate of infrared rays with the wavelength of 780 nm-2400 nm is over 70%, the separation rate of ultraviolet rays with the wavelength of 380 nm is 25-50%, and the transmittance rate of visible light is over 80%. The nanometer self-assembly thermal insulation agricultural film has a high visible light transmittance rate, a high infrared ray separation rate and an appropriate ultraviolet ray transmittance rate. The requirements of crops for optimum growth conditions including a spectrum and the temperature are met. Reasonable technical indexes are found out for the ultraviolet rays and the visible light, and meanwhile, the weather ability of the base film, namely the service life of the base film is taken into consideration. The heat release rate in a greenhouse is lowered in the mode that a separation layer is formed on a film material. Therefore, a heat retaining function is achieved.

Description

[0001] technical field [0002] The invention relates to a composite agricultural film that can effectively block infrared rays and ultraviolet rays, in particular to a heat-insulating agricultural film that self-assembles a heat-insulating coating with a composite resin and nano particles on a transparent base film. Background technique [0003] At present, polyethylene film and polyester film have been widely used as agricultural greenhouse film. However, because the existing greenhouse film does not have the function of heat insulation, the day and night temperature stability in the greenhouse is relatively poor, which is unfavorable for the growth of crops. Although the water spray cooling and other methods currently used can play a certain heat insulation function and improve the temperature stability in the greenhouse day and night, they make the structure of the greenhouse complex and expensive. [0004] The antimony-doped tin oxide (ATO) in US Patent No. 5,807,511...

AI Technical Summary

Problems solved by technology

However, because the existing greenhouse film does not have the function of heat insulation, the day and night temperature stability in the greenhouse is poor, which is not conducive to the growth of crops.

Although the water spray cooling and other methods currently used can play a certain heat insulation function and improve the temperature stability in the greenhouse day and night, but the structure of the greenhouse is complicated and the cost is high.