Biodegradable mulching film

Abstract

The invention discloses a biodegradable mulching film, which comprises the following components in percentage by weight: 33 to 68 percent of alloy master particle, 30 to 65 percent of 7042(LDPE), and 5 to 7 percent of 1F7B. The alloy master particles comprise the following components in percentage by weight: 0.01 to 0.03 percent of tert-butyl peroxide isopropyl benzene, 1.50 to 2.25 percent of fumaric acid, 4.50 to 5.60 percent of microcrystalline wax, 3.60 to 5.40 percent of polyethylene wax, 3.00 to 4.20 percent of MG70, 9.00 to 13.0 percent of N210 and 68 to 80 percent of cornstarch. The biodegradable mulching film has the advantages that: the biodegradable mulching film can adapt to different climates and soil environments in various places as well as the requirements of different crops, the mulching film is degraded in the design life without influencing the planting of the crops, and the mulching film is degraded uniformly and thoroughly; the balance problem of water resistance and hydrophily is solved, and the mulching film has higher ground adherence; and the specific gravity is small, the thickness of the mulching film is only 0.005mm, the material consumption is low and use cost is low, and the biodegradable mulching film can be popularized and applied on a large scale.

Description

【Technical field】 [0001] The invention relates to the technical field of biomaterials, and relates to the preparation of a biodegradable film, in particular to a biodegradable mulch film. 【Background technique】 [0002] Agricultural mulch is an important means of production in agriculture after seeds, fertilizers and pesticides. The mulch film has a good effect of increasing temperature and keeping moisture, and can greatly increase the yield of crops. However, with the large-scale use of common plastic mulch, a large number of mulch fragments remain in the soil. With the accumulation of plastic film fragments, a large amount of residual plastic film destroys the soil structure, causing soil compaction, poor permeability, and soil fertility decline, which seriously affects the growth and production of crops and reduces crop production. If the residual plastic film per mu exceeds 22kg, the crop yield will decrease by 25%; if the residual plastic film per mu exceeds 50kg, th...

AI Technical Summary

Problems solved by technology

[0005] The existing biodegradable mulch still has some deficiencies due to technical problems, for example: ①The degradation life cannot be adjusted, which leads to the early or delayed degradation of the bio-mulch, and loses the effect of the mulch on the heat preservation and moisture conservation of crops; The structural reorganization of ethylene (PE) is a form of wrapping, which cannot form a network bridging structure, resulting in uneven and incomplete degradation of the degradable film, leaving particles or debris, causing secondary pollution; ③ cannot solve the problem of water resistance The problem of the balance between water and hydrophilicity is manifested in the fact that the made mulch cannot cling to the surface and is easily blown away by the wind, and its functionality as a mulch is relatively poor; ④ There are extremely high requirements for the particle size of the raw material Thicker, more material consumption, higher cost

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