Biodegradable mulching film with multi-layer structure

Abstract

The invention discloses a biodegradable mulching film with a multi-layer structure. The film comprises an anti-ageing layer, a water-resisting layer, an insulating layer and a water retaining layer; the anti-ageing layer is prepared from 100 parts of dimethyl terephthalate copolymer, 10-30 parts of polylactic acid, 30-45 parts of nano calcium carbonate, 0.2-0.5 part of erucic acid amide and 0.5-2pars of ultraviolet absorbent; the water-resisting layer is prepared from 100 parts of chemical modified starch, 30-100 parts of polylactic acid and 2-6 parts of plasticizer; the insulating layer is prepared from 100 parts of polyvinyl alcohol, 10-30 parts of polylactic acid, 20-50 parts of polyhydroxyalkanoate, 3-10 parts of ultrafine talcum powder, 0.2-0.5 part of erucic acid amide and 0.5-1 part of citric acid; the water retaining layer is prepared from 100 parts of polyacrylic acid resin, 20-40 parts of polylactic acid, 5-10 parts of docusate sodium and 2-6 parts of polyethylene glycol. The biodegradable mulching film with the multi-layer structure is biodegradable, the thermal insulation and moisturizing effects are good, the uvioresistant and anti-ageing properties are excellent, andthe service life can meet the requirements of the whole growth cycle of crops.

Description

technical field [0001] The invention relates to a biodegradable mulch film with a multilayer structure, belonging to the technical field of agricultural mulch films. Background technique [0002] Agricultural mulch film is an important means of production in modern agriculture. It has the functions of moisturizing, water retention, fertilizer retention, insect control and weed control, etc. It can improve the growth environment of crops, increase crop yield and agricultural benefits, so it is widely used. The raw materials for the production of agricultural mulch films in the prior art usually use polyethylene resin or biodegradable resin; polyethylene resin itself is difficult to decompose in the natural environment, and remains in the soil for a long time, resulting in soil compaction, affecting the growing environment of crops, and causing serious damage. Pollution problems, so polyethylene plastic mulch will be gradually eliminated; biodegradable mulch has complete biode...

AI Technical Summary

Problems solved by technology

The raw materials for the production of agricultural mulch films in the prior art usually use polyethylene resin or biodegradable resin; polyethylene resin itself is difficult to decompose in the natural environment, and remains in the soil for a long time, resulting in soil compaction, affecting the growing environment of crops, and causing serious damage. Pollution problems, so polyethylene plastic mulch will be gradually eliminated; biodegradable mulch has complete biodegradability, but its anti-aging, anti-ultraviolet, heat resistance and other properties are poor, the service life is short, and it is difficult to meet the requirements of the entire growth cycle of crops

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