Three-layer co-extrusion biodegradable mulch film and preparation method thereof

Abstract

The invention provides a three-layer co-extrusion biodegradable mulch film and a preparation method thereof. According to the preparation method of the three-layer co-extrusion biodegradable mulch film, an inner-layer material, a middle-layer material and an outer-layer material are processed into thin membranes by a three-layer co-extrusion membrane blowing technology, and through a material compounding modification technology and a three-layer co-extrusion technology, the biodegradable mulch film has excellent barrier property and good longitudinal / transverse mechanical property.

Description

technical field [0001] The invention relates to the field of agricultural films, in particular to a preparation method of a three-layer co-extruded biodegradable mulch film and a three-layer co-extruded biodegradable mulch film. Background technique [0002] Plastic agricultural mulch has the effect of retaining moisture and increasing temperature on the soil, and then brings increased production and harvest to agriculture. It has been hailed as the third revolution in agriculture after the collection of chemical fertilizers and seeds in my country. my country is the country that uses the most polyethylene mulch every year. It is mainly used in crops such as tobacco, cotton, corn, and vegetables. While polyethylene mulch brings huge benefits to agriculture, it also brings serious "white pollution" to the ecological environment. According to incomplete statistics, the residual amount of polyethylene mulch in some areas of Xinjiang has reached 10-25kg, and it continues to incre...

AI Technical Summary

Problems solved by technology

However, biodegradable materials have problems such as poor mechanical properties, poor water and moisture retention, and uncontrollable degradation time.

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