The application of greenhouse plastic film is one of the most important symbols of agricultural technology development. Up to now, agricultural plastic film has been fully developed, but there are still many problems with the current agricultural film technology in China, one of which is the lack of quality calibration and narrow application range of “functional” agricultural films. In countries such as Japan, functional agricultural films are constantly emerging, providing a solid foundation for increasing agricultural production, improving efficiency, and realizing the added value of agricultural films. The application effect is very significant. Therefore, the development of special, new, and functional agricultural films is currently an urgent problem that needs to be solved. The so-called ‘high-efficiency film’ refers to the addition of special chemical light conversion materials and insulation materials inside the PE greenhouse film, which converts ultraviolet light in sunlight into infrared or near-infrared light that is beneficial for plant growth and development, thereby promoting crop photosynthesis and metabolism, increasing greenhouse temperature, enhancing insulation effect, and achieving the effect of increasing crop yield and maturity.
