A kind of agricultural shed film and preparation method thereof

Abstract

The invention relates to a high-performance agricultural greenhouse film, which consists of an outer layer, a middle layer and an inner layer. The surface of the film is coated with a surfactant coating liquid with the function of eliminating fog and dripping. The outer layer: LDPE90‑110 middle layer: 20-30 parts of LDPE, 65-75 parts of LLDPE and the middle layer masterbatch whose weight of diffusion powder accounts for 1-1.5w% of the total mass of the middle layer; inner layer: 20-25 parts of LDPE, 20-25 parts of LLDPE, 45-50 parts of MLLDPE and Insulation masterbatch accounting for 10-15w% of the total mass of the inner layer; the middle layer masterbatch includes 87.8-93.75 parts of carrier resin, 5-10 parts of diffusing powder, 0.5-1 part of light stabilizer, 0.7-1 part of ultraviolet absorber, antioxidant 0.5-1 part of agent and 0.05-0.1 part of dispersant; the thermal insulation masterbatch includes hydrotalcite and LDPE in a weight ratio of 3:7; the LDPE of the outer layer is low-density polyethylene produced by Borealis with a product model of FB2230; The solution is prepared by diluting the original solution and deionized water at a ratio of 1:15‑20. The aging life of the shed film of the present invention reaches 1-3 years, and the effective period of eliminating fog and dripping is 1-3 years, which is beneficial to the growth of crops.

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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