Agricultural shed film and preparation method thereof

Abstract

The invention relates to a high-performance agricultural greenhouse shed film. The high-performance agricultural greenhouse shed film comprises an outer layer, an intermediate layer and an inner layer, wherein the surface of the film is coated by surfactant coating liquid with a fog dispersal dripping function; the outer layer comprises 90-110 parts of LDPE (low-density polyethylene); the intermediate layer comprises 20-30 parts of LDPE, 65-75 parts of LLDPE (linear low density polyethylene) and an intermediate layer master batch of which the weight of diffusion powder accounts for 1-1.5 weight percent of the total mass of the intermediate layer; the inner layer comprises 20-25 parts of LDPE, 20-25 parts of LLDPE, 45-50 parts of MLLDPE (metallocene polyethylene) and a heat-preserving master batch which accounts for 10-15 weight percent of the total mass of the inner layer; the intermediate layer master batch comprises 87.8-93.75 parts of carrier resin, 5-10 parts of diffusion powder, 0.5-1 part of a light stabilizer, 0.7-1 part of an ultraviolet absorber, 0.5-1 part of an anti-oxidant and 0.05-0.1 part of a dispersing agent; the heat-preserving master batch comprises hydrotalcite and the LDPE, and the weight ratio of the hydrotalcite to the LDPE is 3:7; the LDPE of the outer layer is FB2230 low-density polyethylene which is produced by Borealis; the coating liquid is formed by diluting raw liquid and deionized water at a proportion of 1:(15-20). The aging life of the shed film reaches 1-3 years, the duration of fog dispersal dripping is 1-3 years, and crop growth is facilitated.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a high-performance agricultural greenhouse film. Background technique [0002] At present, there are mainly two types of functional films for greenhouse covering. One is to prepare anti-fog and dripping shed films by adding anti-fogging agents and dripping agents into the films. This method is to make a functional masterbatch by mixing antifogging agent, dripping agent and other corresponding additives with carrier resin, and then add the masterbatch into PE resin or PE+EVA mixed resin in a certain proportion, and then extrude Blown into film. Due to the compatibility of the antifogging agent and dripping agent with PE and EVA, it will gradually migrate to the surface of the film, thereby reducing the surface energy of the film, and realizing the function of no water dripping and rapid elimination of water mist in the shed. The second is to make anti-fogging agent, dripping age...

AI Technical Summary

Problems solved by technology

Adding polysiloxane or acrylate micropowder to general-purpose PE resin can also make a film with better light diffusion effect, but if you want to achieve a haze value of 50-70%, the light transmittance should reach 80-90%. % is very difficult, that is to say, if you want to increase the haze value of the product, the light transmittance will inevitably lose a lot

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