Degradable mulching film with multi-layer structure
By setting up a tensile-resistant reinforcement layer and breathable holes in the multi-layer structural plastic film, the problem of insufficient breathability and water permeability in the prior art is solved, and the balance between tensile resistance and breathability of the plastic film is achieved, and the plant growth environment is optimized.
Patent Information
- Application Number
- CN202422537565.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-10-21
AI Technical Summary
While the existing multi-layered structural mulch increases tensile resistance, the breathability and water permeability are greatly reduced, affecting plant growth.
A multi-layer structural design is adopted, including a microbial layer, a thermal insulation layer and a tensile-resistant and breathable plastic film layer. Tensile-resistant reinforcement layers are set on both sides of the plastic film base layer, and reinforcement strips are set up at intervals on the reinforcement layer. The breathable holes are conical, and the breathable holes are evenly distributed in the spacer groove.
The balance between tensile resistance, breathability and water permeability of the mulch film is achieved, ensuring the optimization of the plant growth environment.
Smart Images
Figure CN223231722U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of degradable ground films, in particular to a multi-layered degradable ground film. Background Art
[0002] Ground film, particularly in agriculture, is widely used to improve the growing environment for crops, increase soil temperature, reduce water evaporation, and inhibit weed growth. Traditional ground film is typically made from petroleum-based materials such as polyethylene (PE). These materials are strong and inexpensive, but they cause serious environmental pollution after use. They are difficult to degrade and remain in soil and water for a long time, affecting the ecological environment and the sustainable development of farmland. With the continuous expansion of agricultural production, the problem of plastic pollution has become increasingly prominent, especially in developing countries. Farmers often lack effective means to dispose of waste ground film. This waste not only destroys the physical and chemical properties of the soil, but also threatens the ecosystem and affects biodiversity. Therefore, finding biodegradable alternative materials has become a top priority.
[0003] However, the existing technology still has major deficiencies, such as:
[0004] Most of the multi-layer structure films in the existing technology are made to have a certain tensile strength by adding more layers and thickness. Although this operation does ensure the tensile strength of the film to a certain extent, the excessive thickness and number of layers also greatly reduce the air permeability and water permeability of the film, which will affect the growth of plants. Utility Model Content
[0005] The purpose of the utility model is to provide a multi-layer degradable ground film to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-layer degradable ground film, comprising, from bottom to top, a microbial layer, a heat-insulating layer, and a tensile-resistant and breathable ground film layer;
[0007] The anti-stretching breathable ground film layer includes a ground film base layer, and anti-stretching reinforcement layers are provided on both sides of the ground film base layer;
[0008] A plurality of reinforcing strips are provided on the surface of the reinforcing layer. The reinforcing strips are evenly spaced on the reinforcing layer, and a plurality of spacing grooves are formed between two adjacent reinforcing strips. A plurality of air holes are provided in the spacing grooves. The ground film base insulation layer and the microbial layer are both provided with a through hole corresponding to the air hole.
[0009] Preferably, the thickness of the ground membrane base layer is not greater than 5 microns, and the thickness of the tensile reinforcement layer is not greater than 3 microns.
[0010] Preferably, the number of the reinforcement strips is not less than 3, and the distance between the outer reinforcement strips and the edge of the tensile reinforcement layer is not less than 5 cm.
[0011] Preferably, the number of air holes opened in the spacing grooves per meter is not less than 10, and the air holes in adjacent spacing grooves are opened at intervals.
[0012] Preferably, the air holes are conical holes.
[0013] Preferably, the distance between adjacent reinforcement strips is no more than 4 cm.
[0014] Preferably, the end surface of the reinforcement strip is semicircular.
[0015] Compared with the prior art, the beneficial effects of the present invention are:
[0016] 1. By setting up reinforcement layers on both sides of the base of the mulch, the tensile strength of the mulch is guaranteed. At the same time, the reinforcement strips arranged at intervals on the reinforcement layer further ensure the tensile strength of the mulch.
[0017] 2. The air permeability and water permeability of the entire ground film are guaranteed by the several air holes opened in the interval groove. The air holes are arranged in a conical shape to further ensure that the air permeability and water permeability can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of the anti-stretch breathable ground film layer, the thermal insulation layer and the microbial layer of the utility model;
[0019] Figure 2 This is a schematic diagram of the overall ground film of the utility model;
[0020] Figure 3 This is a schematic diagram of the vent holes and through holes of the utility model;
[0021] Figure 4 This is a three-dimensional schematic diagram of the reinforcement layer of the utility model.
[0022] In the figure: 1. Microbial layer; 2. Insulation layer; 3. Anti-stretching breathable ground membrane layer; 31. Ground membrane base layer; 32. Reinforcement layer; 321. Reinforcement strip; 322. Spacer groove; 323. Air hole; 4. Through hole. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0024] See also Figure 1-4 , the utility model provides a technical solution:
[0025] A multi-layer degradable ground film, comprising, from bottom to top, a microbial layer 1, a thermal insulation layer 2, and a tensile-resistant breathable ground film layer 3;
[0026] The overall structure of the ground film includes three layers: a microbial layer 1, a thermal insulation layer 2, and a tensile-resistant and breathable ground film layer 3. The microbial layer 1 is coated with a coating that is conducive to plant growth, and the entire ground film is made of degradable materials, so that the entire ground film can be easily degraded in the future to prevent pollution to the environment.
[0027] The anti-stretching breathable ground membrane layer 3 comprises a ground membrane base layer 31, and anti-stretching reinforcement layers 32 are provided on both sides of the ground membrane base layer 31;
[0028] In this embodiment, the tensile strength of the entire ground membrane is ensured by providing reinforcement layers 32 on both sides of the ground membrane base layer 31, rather than achieving the tensile strength by stacking more layers.
[0029] A plurality of reinforcing strips 321 are provided on the surface of the reinforcing layer 32. The reinforcing strips 321 are evenly spaced on the reinforcing layer 32, and a plurality of spacing grooves 322 are formed between two adjacent reinforcing strips 321. A plurality of air holes 323 are provided in the spacing grooves 322. The insulation layer 2 and the microbial layer 1 of the ground film base layer 31 are both provided with a through hole 4 corresponding to the air hole 323. The thickness of the ground film base layer 31 is not more than 5 microns, and the thickness of the reinforcing layer 32 is not more than 3 microns.
[0030] The plurality of reinforcing strips 321 are provided on the surface of the reinforcing layer 32 to further ensure the tensile strength of the reinforcing layer 32, while ensuring that the thickness of the ground membrane base layer 31 and the reinforcing layer 32 is limited to ensure that the thickness of the tensile strength and breathable ground membrane layer 3 is not too thick. A plurality of air holes 323 are evenly opened inside the spacing grooves 322 to ensure the air permeability and water permeability of the membrane. In this embodiment, the air holes 323 are conical holes. Such an arrangement makes the air holes 323 on the upper reinforcing layer 32 appear larger at the top and smaller at the bottom. Since the two reinforcing layers 32 are symmetrically arranged with the ground membrane base layer 31 as the symmetry axis, the air holes 323 on the lower reinforcing layer 32 appear larger at the bottom and smaller at the top. At the same time, there will be a very small strip gap between the lower reinforcing layer 32 and the thermal insulation layer 2 under the action of the reinforcing strips 321, which can ensure To ensure that the air passes through the lower reinforcement layer 32, it can be dispersed and then enter the interior of the ground film through the through holes 4 on the thermal insulation layer 2 and the microbial layer 1. The number of air holes 323 opened in the spacing grooves 322 per 1 meter is not less than 10, and the air holes 323 inside adjacent spacing grooves 322 are opened at intervals. The number of air holes 323 opened inside the spacing grooves 322 is not less than 10 per 1 meter to ensure the ventilation effect. At the same time, the air holes 323 inside adjacent spacing grooves 323 are arranged at intervals, which can further ensure that after the air passes through the upper reinforcement layer 32 and the ground film base layer 31, it can be more fully distributed to the strip gap between the lower reinforcement layer 32 and the thermal insulation layer 2. The layers in this embodiment are glued together by degradable biological glue, which is well known to those skilled in the art and will not be described here.
[0031] The number of reinforcing strips 321 is not less than 3, and the distance between the outer reinforcing strips 321 and the edge of the tensile reinforcing layer 32 is not less than 5 cm, the distance between adjacent reinforcing strips 321 is not more than 4 cm, and the end face of the reinforcing strip 321 is semicircular.
[0032] The number of reinforcing strips 321 in this embodiment is 3, which are evenly spaced. The distance between adjacent reinforcing strips 321 is no more than 4 cm, which ensures the effect of the reinforcing strips 321 and its anti-tensile effect on the reinforcing layer 32. At the same time, in this embodiment, considering that the edges of the ground film are usually covered with soil during installation, the outer reinforcing strips 321 are set to a position no less than 5 cm away from the edge, ensuring that after the installation is completed, more reinforcing strips 321 can be located outside the soil cover, ensuring that the reinforcing strips 321 can still play a good anti-tensile effect after installation.
[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A multi-layer degradable ground film, characterized by: The invention comprises, from bottom to top, a microbial layer (1), a heat-insulating layer (2) and a stretch-resistant breathable ground film layer (3); The stretch-resistant breathable ground film layer (3) comprises a ground film base layer (31), and the ground film base layer (31) is provided with a stretch-resistant reinforcement layer (32) on both sides thereof; The surface of the reinforcement layer (32) is provided with a plurality of reinforcement strips (321), the reinforcement strips (321) are evenly spaced on the reinforcement layer (32), and a plurality of spacing grooves (322) are formed between two adjacent reinforcement strips (321), a plurality of air holes (323) are provided in the spacing grooves (322), and the insulation layer (2) and the microbial layer (1) of the ground film base (31) are both provided with a through hole (4) corresponding to the air hole (323).
2. The multi-layer degradable ground film according to claim 1, characterized in that: The thickness of the ground membrane base layer (31) is not greater than 5 microns, and the thickness of the tensile reinforcement layer (32) is not greater than 3 microns.
3. The multi-layer degradable ground film according to claim 2, characterized in that: The number of the reinforcement strips (321) is not less than 3, and the distance between the outer reinforcement strips (321) and the edge of the tensile reinforcement layer (32) is not less than 5 centimeters.
4. The multi-layer degradable ground film according to claim 3, characterized in that: The number of the air holes (323) opened in the spacing groove (322) per meter is not less than 10, and the air holes (323) inside adjacent spacing grooves (322) are opened at intervals.
5. The multi-layer degradable ground film according to claim 1, characterized in that: The vent hole (323) is a conical hole.
6. The multi-layer degradable ground film according to claim 1, characterized in that: The distance between adjacent reinforcing strips (321) is no greater than 4 centimeters.
7. The multi-layer degradable ground film according to claim 1, characterized in that: The end surface of the reinforcement strip (321) is semicircular.