Preparation method of multifunctional light-conversion thin film added with rare earth

Abstract

The invention provides a preparation method of a multifunctional light-conversion thin film added with rare earth and relates to the technical film of thin films. The multifunctional light-conversion thin film is composed of low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), metallocene polyethylene, a rare-earth light conversion agent, an anti-ageing agent and an antifogging agent. The preparation method is characterized by particularly comprising the following steps of: (1) mixing the LDPE, the rare-earth light conversion agent, the anti-ageing agent and the antifogging agent; carrying out drying treatment on the mixture; after drying the mixture, extruding and granulating through a granulating machine; and drying and sieving grains to obtain a master batch; (2) mixing the LDPE, the LLDPE, mLLDPE and the master batch; mixing, and extruding and carrying out film blowing through an extruding machine; drawing and winding after cooling by an air ring to obtain a finish product; and (3) checking and packaging the finished product, and storing to obtain the multifunctional light-conversion thin film added with the rare earth. The multifunctional light-conversion thin film added with the rare earth can improve the photo-thermal effectiveness, enhances the photosynthetic capacity of crops, and increases the accumulation of dry substances; the content of chlorophyll, starch and sugar in the crops is improved and the absorption capability of nitrogen is improved, the yield of the crops is increased and the quality is improved; and meanwhile, the multifunctional light-conversion thin film added with the rare earth has the properties of long service life, antifogging property and the like.

Description

technical field [0001] The invention relates to the technical field of thin films, in particular to a method for preparing a rare earth-added multifunctional light-converting thin film. Background technique [0002] Agricultural film is used to cover plastic greenhouses such as solar greenhouses and vegetable greenhouses, which is very common in China. Practice has proved that the application of plastic greenhouse film is one of the most important symbols of the development of agricultural science and technology, and it is an important means to increase agricultural production and income and solve the vegetable basket project. However, as far as my country's current agricultural film technology is concerned, there are still many problems. One of them is that there are few varieties of "functional" agricultural films and their applications are narrow. In Japan and other countries, functional agricultural films emerge in endlessly. The increase of agricultural production, the ...

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Problems solved by technology

However, as far as my country's current agricultural film technology is concerned, there are still many problems. One of them is that there are few varieties of "functional" agricultural films and their applications are narrow. In Japan and other countries, functional agricultural films emerge in endlessly. The increase of agricultural production, the improvement of benefits and the realization of high added value of agricultural film provide a solid foundation, and the application effect is very significant

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