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A Preliminary Determination of Mechanical and Suspension Properties of Waste Mulch Film and Cotton Stalk
Summary
This study measured the mechanical and aerodynamic suspension properties of waste agricultural mulch film and cotton stalks to improve the design of collection and separation equipment. Better machinery for collecting plastic mulch film from fields before it fragments would reduce agricultural microplastic contamination of soil.
In order to provide basic data and a theoretical basis for waste mulch film crushing and separation equipment, the mechanical and suspension properties of waste mulch film and cotton stalk were determined in this study. In the mechanical properties test, the tensile properties of waste mulch film and the shear properties of different parts of cotton stalk were investigated. In the suspension properties test, the suspension properties of different qualities of waste mulch film and different parts of cotton stalk were investigated. The results showed that the average maximum tensile forces and fracture displacements of the waste mulch film were 1.70 N (horizontal), 0.80 N (vertical) and 254.75 mm (horizontal), 145.22 mm (vertical). The shear properties of the cotton stem after wrapping the mulch film were greatly improved; the maximum shearing force was 186.89% higher than that of the unwrapped specimens. When the total suspension velocity was from 3.09 to 4.07 m/s, separation of mulch film and cotton stalk could be achieved by wind.
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