Biodegradable agricultural film with weeding effect and preparation method of biodegradable agricultural film

Abstract

The invention relates to a biodegradable agricultural film with a weeding effect and further relates to a preparation method of the biodegradable agricultural film with the weeding effect. The biodegradable agricultural film is prepared from components in parts by weight as follows: 30-80 parts of poly adipic acid / butylene terephthalate, 0-30 parts of polylactic acid, 10-70 parts of papermaking waste, 0-30 parts of starch and 0.5-15 parts of an auxiliary. The biodegradable agricultural film with the weeding effect has the advantages as follows: the papermaking waste is added to a degradable material, and production cost of master batch for the biodegradable agricultural film with the weeding effect is substantially reduced; the papermaking waste is effectively utilized, and environment stress is reduced; the biodegradable agricultural film which is compounded with the papermaking waste and has the weeding effect has low light transmittance, high light resistance and good weeding property and can prevent weeds from being contacted with light, so that photosynthesis of the weeds can be prevented.

Description

technical field [0001] The invention relates to the technical field of degradable composite materials, in particular to a weed-killing biodegradable agricultural film and a preparation method thereof. Background technique [0002] According to the statistics of the Food and Agriculture Organization of the United Nations, the world's average annual yield reduction due to weed damage is 10-15%. Due to the long-term, large-scale, excessive, and continuous use of herbicides, weeds develop resistance, and the toxic and negative effects of herbicide residues become more prominent, harming crops; organic chlorine, organic phosphorus pollution in soil and water, Fatal damage has been done to microbial populations and crops in the soil, while weeds have become more resistant to pesticides, polluting the environment and destroying soil textures. [0003] The agricultural mulch currently used mostly uses polyethylene (PE), which can achieve a certain heat preservation and moisturizing...

AI Technical Summary

Problems solved by technology

The raw materials and processing cost of this invention are relatively high, and there is no weeding effect, and manual weeding is required, which further increases the cost

[0005] The pulp and paper industry separates about 140 million tons of cellulose from plants every year, and at the same time obtains a large amount of by-products of papermaking waste, but so far, more than 95% of papermaking waste is still directly discharged into rivers or concentrated and burned. less effective use

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