Insect-repellent fully biodegradable agricultural mulching film

Abstract

The utility model relates to agricultural mulching film technical field, specifically disclose a kind of waterborne ultrathin type expanded steel structure fireproof paint preparation device, including mulching film ontology, the mulching film ontology is the multilayer composite structure including upper surface layer, intermediate core layer and lower surface layer;The intermediate core layer is made of full biodegradable high molecular matrix;The upper surface layer and lower surface layer structure are same and inside are uniformly dispersed and are provided with insect repellent microcapsule, by multilayer composite structure integration degradable material and insect repellent function, effectively avoid the white pollution problem of traditional mulching film, reduce the chemical pesticide usage amount, reduce farmland management cost, simultaneously utilize microcapsule slow-release technology to extend the insect repellent action period, improve the ecological security of crop growth environment, with green agricultural development direction, with remarkable environmental benefits and popularization and application value.

Description

Technical Field

[0001] This utility model relates to the field of agricultural mulch film technology, and specifically discloses a fully biodegradable agricultural mulch film that can repel insects. Background Technology

[0002] Agricultural mulch film is a widely used production material in modern agriculture, serving functions such as heat preservation, moisture retention, and weed suppression, and can significantly increase crop yields. Currently, most mainstream mulch film products on the market are made of petroleum-based plastics such as polyethylene (PE), which are non-degradable. Their residues can cause serious "white pollution," damage soil structure, and affect crop growth.

[0003] To address this issue, fully biodegradable mulch films have emerged. They are typically made of biodegradable materials such as polylactic acid (PLA), polybutylene terephthalate (PBAT), and starch. At the end of their service life, they can be decomposed into carbon dioxide and water by microorganisms in the natural environment, making them environmentally friendly.

[0004] However, existing fully biodegradable mulch films have limited functions, typically only providing basic physical coverage. Crops are often attacked by underground pests (such as cutworms, grubs, and mole crickets) and above-ground pests during their growth, requiring farmers to spray additional chemical pesticides. This not only increases labor costs and the risk of pesticide residues but also contradicts the direction of green and ecological agricultural development.

[0005] Therefore, developing a fully biodegradable agricultural mulch film that can both avoid white pollution and actively prevent and control pests and diseases has important practical significance and application value. Utility Model Content

[0006] This invention proposes a fully biodegradable agricultural mulch film that can repel insects. Through a multi-layer composite structure, it integrates biodegradable materials and insect-repelling functions, effectively avoiding the white pollution problem of traditional mulch films, reducing the amount of chemical pesticides used, and lowering farmland management costs. At the same time, it uses microcapsule slow-release technology to extend the insect-repelling effect period, improve the ecological safety of the crop growth environment, and is in line with the development direction of green agriculture. It has significant environmental benefits and promotion and application value.

[0007] This invention is achieved as follows: a fully biodegradable agricultural mulch film that can repel insects includes a mulch film body, which is a multi-layer composite structure comprising an upper surface layer, a middle core layer, and a lower surface layer; the middle core layer is made of a fully biodegradable polymer substrate; the upper surface layer and the lower surface layer have the same structure and both contain uniformly dispersed insect repellent microcapsules.

[0008] As a preferred embodiment of the present invention, the insect repellent microcapsule comprises a wall material and a core material. The wall material is a capsule wall made of a chitosan and sodium alginate complex, and the core material is a plant-derived insect repellent.

[0009] As a preferred embodiment of the insect-repellent, fully biodegradable agricultural mulch film of this utility model, the plant-derived insect repellent is one or more of azadirachtin, pyrethrin, matrine, citronella oil, and eucalyptus oil, or a mixture thereof.

[0010] As a preferred embodiment of the insect-repellent, fully biodegradable agricultural mulch film of this invention, the length of the insect repellent microcapsules ranges from 10 to 100 micrometers.

[0011] As a preferred embodiment of the insect-repellent, fully biodegradable agricultural mulch film of this utility model, the fully biodegradable polymer substrate is one or more blends of polylactic acid, polybutylene adipate / terephthalate, polyhydroxyalkanoates, and starch-based plastics.

[0012] As a preferred embodiment of the insect-repellent, fully biodegradable agricultural mulch film of this utility model, the thickness ratio of the upper surface layer, the middle core layer, and the lower surface layer is 1:6:1.

[0013] As a preferred embodiment of the insect-repellent, fully biodegradable agricultural mulch film of this invention, the surface of the lower layer is provided with embossing to increase surface roughness and adhesion.

[0014] The beneficial effects of this utility model are:

[0015] This device integrates biodegradable materials and insect-repelling functions through a multi-layered composite structure, effectively avoiding the white pollution problem of traditional plastic film, reducing the use of chemical pesticides, and lowering farmland management costs. At the same time, it uses microcapsule slow-release technology to extend the insect-repelling cycle, improve the ecological safety of the crop growth environment, and is in line with the development direction of green agriculture. It has significant environmental benefits and promotion and application value. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a diagram showing the overall external structure of the present invention;

[0018] Figure 2 This is a cross-sectional structural diagram of the mulch film body of this utility model;

[0019] Figure 3 This utility model Figure 2 Enlarged structural diagram of part a in the middle.

[0020] The markings in the diagram are: 1. Mulch film body; 2. Upper surface layer; 3. Middle core layer; 4. Lower surface layer; 5. Insect repellent microcapsules; 6. Wall material; 7. Core material; 8. Embossing. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0022] Please see Figure 1-3 A fully biodegradable agricultural mulch film capable of repelling insects includes a mulch film body 1, which is a multi-layer composite structure comprising an upper surface layer 2, a middle core layer 3, and a lower surface layer 4; the middle core layer 3 is made of a fully biodegradable polymer substrate; the upper surface layer 2 and the lower surface layer 4 have the same structure and both contain uniformly dispersed insect repellent microcapsules 5.

[0023] In this embodiment: the insect-repellent, fully biodegradable agricultural mulch film includes a mulch film body 1, which is composed of an upper surface layer 2, a middle core layer 3 and a lower surface layer 4 to form a multi-layer composite structure. The middle core layer 3 is made of a fully biodegradable polymer substrate to achieve environmental degradation. Both the upper surface layer 2 and the lower surface layer 4 contain uniformly dispersed insect repellent microcapsules 5, which achieve continuous insect repellency through the microcapsule slow-release mechanism, and have the dual functions of covering and moisture retention and pest control.

[0024] As a technical optimization of this utility model, the insect repellent microcapsule 5 includes a wall material 6 and a core material 7. The wall material 6 is a capsule wall made of a chitosan and sodium alginate complex, and the core material 7 is a plant-derived insect repellent.

[0025] In this embodiment: by using a chitosan and sodium alginate composite wall material 6 to encapsulate a plant-derived insect repellent as a core material 7, the biocompatibility and controllable degradation of the wall material are utilized to achieve the protection and targeted release of the insect repellent.

[0026] As a technical optimization of this utility model, the plant-derived insect repellent is one or more of azadirachtin, pyrethrin, matrine, citronella oil, and eucalyptus oil, or a mixture thereof.

[0027] In this embodiment, the plant-derived insect repellent is one or more of azadirachtin, pyrethrin, matrine, citronella oil, and eucalyptus oil, which exerts a green repellent effect and reduces dependence on chemical pesticides.

[0028] As a technical optimization of this utility model, the length of the insect repellent microcapsule 5 ranges from 10 to 100 micrometers.

[0029] In this embodiment, the size of the insect repellent microcapsules 5 is controlled within 10-100 micrometers to ensure their uniform dispersion and compatibility with the mulch film material.

[0030] As a technical optimization of this utility model, the fully biodegradable polymer substrate is one or more blends of polylactic acid, polybutylene adipate / terephthalate, polyhydroxyalkanoate, and starch-based plastics.

[0031] In this embodiment: the fully biodegradable polymer substrate is a blend of one or more of polylactic acid, polybutylene adipate / terephthalate, polyhydroxyalkanoate, and starch-based plastics, which is a biodegradable blend material to ensure the overall biodegradability of the mulch film.

[0032] As a technical optimization of this utility model, the thickness ratio of the upper surface layer 2, the middle core layer 3 and the lower surface layer 4 is 1:6:1.

[0033] In this embodiment, the thickness ratio of the upper surface layer 2, the middle core layer 3, and the lower surface layer 4 is 1:6:1. The mechanical properties and functional layer ratio are optimized by using a thickness ratio of 1:6:1.

[0034] As a technical optimization of this utility model, the surface of the lower layer 4 is provided with embossed textures 8 to increase surface roughness and adhesion.

[0035] In this embodiment: the surface of the lower surface layer 4 is provided with embossing 8 to increase surface roughness and adhesion. The embossing 8 on the lower surface layer 4 enhances soil adhesion and resistance to displacement.

[0036] The working principle and usage process of this utility model are as follows: After the mulch is laid, the insect repellent microcapsules 5 in the upper surface layer 2 and the lower surface layer 4 gradually degrade the wall material 6 under the action of environmental humidity and microorganisms, slowly releasing the plant-derived insect repellent components in the core material 7 to form an insect repellent gas barrier; the fully biodegradable polymer substrate of the middle core layer 3 is gradually decomposed into carbon dioxide and water by microbial metabolism in the soil, while the embossing 8 of the lower surface layer 4 strengthens the mechanical bond between the mulch and the soil by increasing the friction coefficient, preventing wind lifting or displacement, and achieving the functions of covering and moisture retention and pest control.

[0037] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A pest-repellent, fully biodegradable agricultural mulching film comprising a film body (1), characterized in that: The mulch film body (1) is a multi-layer composite structure including an upper surface layer (2), an intermediate core layer (3) and a lower surface layer (4); the intermediate core layer (3) is made of a fully biodegradable polymer substrate; the upper surface layer (2) and the lower surface layer (4) have the same structure and are both provided with uniformly dispersed insect repellent microcapsules (5).

2. The pest-repellent, fully biodegradable agricultural mulching film according to claim 1, characterized by: The length of the insect repellent microcapsule (5) ranges from 10 to 100 micrometers.

3. The pest-repellent, fully biodegradable agricultural mulching film according to claim 1, characterized by: The thickness ratio of the upper surface layer (2), the middle core layer (3), and the lower surface layer (4) is 1:6:

1.

4. The pest-repellent, fully biodegradable agricultural mulching film according to claim 1, characterized by: The surface of the lower layer (4) is provided with embossing (8) to increase surface roughness and adhesion.

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