A fully biodegradable mulching film suitable for highland extreme environment and a preparation method thereof

Through innovative design of multi-layer composite membrane structure and functional additives, the problems of ultraviolet sensitivity, rapid moisture evaporation and additive loss of fully biodegradable mulch film in the extreme environment of plateau have been solved, achieving efficient moisture retention and heat management, and ensuring the stability and environmental friendliness of mulch film in plateau areas.

CN121946978BActive Publication Date: 2026-06-19EAST CHINA ENGINEERING SCIENCE AND TECHNOLOGY CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
EAST CHINA ENGINEERING SCIENCE AND TECHNOLOGY CO LTD
Filing Date
2026-03-31
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing fully biodegradable mulch films face challenges in the extreme environment of high-altitude areas, such as rapid molecular chain breakage due to high ultraviolet radiation intensity, rapid water evaporation, thermal stress fatigue caused by large diurnal temperature differences, and easy migration and loss of functional additives, making it difficult to meet the needs of high-altitude agriculture.

Method used

The film adopts a multi-layer composite membrane structure, with an outer UV protection layer, a middle water vapor barrier layer, and an inner heat insulation and protection layer. By adding UV absorbers, nano-inorganic shielding agents, sheet-like barrier fillers, and infrared barrier fillers, a three-dimensional cross-linked network structure is formed, which enhances the weather resistance and moisture retention capacity of the mulch film.

Benefits of technology

It effectively blocks strong ultraviolet rays at high altitudes, reduces water evaporation, improves the thermal stability of the mulch film, prevents the migration of additives, ensures the stability of the mulch film throughout the planting season, and is completely biodegradable after use, without polluting the soil environment.

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Abstract

This invention proposes a fully biodegradable mulch film suitable for extreme high-altitude environments and its preparation method, comprising at least one three-layer composite film consisting of an outer layer, a middle layer, and an inner layer; the outer layer is an ultraviolet protective layer, the middle layer is a water vapor barrier layer, and the inner layer is a heat-insulating and protective layer. The mulch film of this invention is a fully biodegradable multilayer co-extruded agricultural mulch film integrating "super weather resistance, high barrier moisture retention, intelligent thermal management, and prevention of additive migration," thereby overcoming the shortcomings of existing mulch films in applications in extreme high-altitude environments.
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Citation Information

Patent Citations

  • Preparation method of three-layer co-extrusion whole-biodegradable mulching film and the three-layer co-extrusion whole-biodegradable mulching film

    CN106363898A

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    CN107282021A