Completely-biodegradable agricultural mulching film

Abstract

The invention relates to the technical field of mulching film production, and concretely relates to a completely-biodegradable agricultural mulching film. The completely-biodegradable agricultural mulching film comprises, by weight, 50-70 parts of a poly(3-hydroxybutyrate) and polyhydroxyvalerate copolymer, 10-15 parts of polybutylene succinate, 0.5-2 parts of acetylferrocene, 1-3 parts of a polymeric hindered amine light stabilizer, 0.5-3 parts of 2-(2'-hydroxy-5'-methylphenyl)benzotriazol, 5-8 parts of bentonite and 4-8 parts of carboxymethylcellulose sodium. The agricultural mulching film can be completely degraded, and has the advantages of good mechanical stress resistance, good wet resistance, environmental protection and no pollution.

Description

technical field [0001] The invention relates to the technical field of plastic film production, in particular to a completely biodegradable agricultural plastic film. Background technique [0002] With the continuous development of my country's large-scale agricultural planting technology, the demand for agricultural ground covering plastic film, called "mulch film" for short, is also increasing. my country has become the world's largest consumer of agricultural "mulch film". At present, most agricultural mulches use PE mulches, which are difficult to degrade and become fragments after aging, affecting the structure and fertilizer efficiency of the soil, which not only brings inconvenience to farming, but also further aggravates the problem of "white pollution". [0003] In order to make ordinary agricultural mulch easier to degrade, the Chinese invention patent application publication number CN 102329446 A discloses a starch-based degradable agricultural mulch transparent c...

AI Technical Summary

Problems solved by technology

At present, most agricultural mulch films use PE mulch films, which are difficult to degrade and become fragments after aging, which affects the structure of the soil and fertilizer efficiency, which not only brings inconvenience to farming, but also further aggravates the problem of "white pollution"

[0003] In order to make ordinary agricultural mulch easier to degrade, the Chinese invention patent application publication number CN 102329446 A discloses a starch-based degradable agricultural mulch transparent composite material. The invention uses corn starch as the main matrix to make the product degradable. The invention provides The mechanical stress resistance and moisture resistance of the film are poor, and it is not suitable for the complex and changeable application environment of the agricultural film, and the actual application degree is low