CN215380341U

CN215380341U - Biodegradable composite material provided with 3D accommodating cavity and mulching film and geotextile comprising same

Info

Publication number: CN215380341U
Application number: CN202121386246.9U
Authority: CN
Inventors: 孟东伟
Original assignee: Xiamen Huansuyuan New Material Technology Co ltd
Current assignee: Xiamen Huansuyuan New Material Technology Co ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2022-01-04
Anticipated expiration: 2031-06-22

Abstract

The utility model relates to a biodegradable composite material with a 3D accommodating cavity, and a mulching film and geotextile comprising the same, wherein the biodegradable composite material with the 3D accommodating cavity comprises a first biodegradable layer, such as a PCL layer, a plurality of first through holes with the size of 100-500 mu m are arranged on the first biodegradable layer, and a second biodegradable layer, such as a PBAT layer, is connected below the first biodegradable layer; a 3D accommodating cavity which protrudes outwards in the direction far away from the bottom layer of the first biodegradable layer is arranged on the second biodegradable layer, and the 3D accommodating cavity and the first through hole are arranged in opposite directions; and a plurality of hot pressing points for supporting the 3D accommodating cavity are circumferentially arranged at the bottom of the 3D accommodating cavity. The 3D accommodating cavity is provided with a plurality of second through holes with the size of 10-100 mu m, and the second through holes are communicated with the first through holes. The diameter of the 3D accommodating cavity is 3-30mm, and the height of the 3D accommodating cavity is 1.5-15 mm.

Description

Biodegradable composite material provided with 3D accommodating cavity and mulching film and geotextile comprising same

Technical Field

The utility model belongs to the technical field of materials, and particularly relates to a biodegradable composite material provided with a 3D accommodating cavity, and a mulching film and geotextile containing the biodegradable composite material.

Background

The plastic mulching cultivation has the functions of heat preservation and soil moisture preservation, can improve the crop yield, increase the economic benefit and bring the yield increase and harvest for agriculture. At present, China is also the country with the most production and use amount of agricultural mulching films in the world. However, the common mulching films cannot be recycled, so that the problem of serious white pollution to soil and environment is caused, residual mulching films are accumulated in soil plough layers year by year due to the fact that the common mulching films are used in successive years, soil hardening is caused, crop yield is reduced, the recycling cost of the mulching films is high, and labor and time are wasted. The use of the traditional mulching film does not meet the requirement of environmental protection. Meanwhile, fertilizing crops is field operation which must be carried out, and the field operation has certain time and space condition limitations. Therefore, it is highly desirable to provide an agricultural film with good air permeability and suitable water vapor barrier capability, and also with a slow-release fertilizer effect function.

Another industrial fabric, also called geotextile, produced and used in China is a water-permeable geosynthetic material formed by needling or weaving synthetic fibers, the finished product is in a fabric shape, the geotextile is divided into woven geotextile and non-woven geotextile, at present, the geotextile is mainly applied to projects with small silt diameter and large stress, such as water conservancy, ports, navigation channels, railways, highways and the like, and the geotextile has the main functions of:

1. isolation: building materials with different physical properties are isolated, so that the materials are not mixed, and the integrity of the materials is kept;

2. and (3) filtering: when water flows into the coarse material soil layer from the fine material soil layer, the water passes through the geotextile to intercept materials such as soil particles, fine sand and the like by utilizing the water permeability of the geotextile;

3: the stabilizing effect is as follows: the tensile and deformation resistance of the soil body is enhanced, and the stability of the building structure is enhanced.

However, the existing geotextile has a single structure, low tensile strength and deformation resistance, poor stability and easy deformation, and cannot well play a role in blocking, resisting and self-regulating moisture. Meanwhile, the geotextile is usually produced by polypropylene fibers, terylene, spandex, chinlon or synthetic fibers, is not easy to degrade when in use, and can not be decomposed even if buried in soil for decades, so that for some temporary projects, the geotextile is required to be recycled after the project is finished, the production cost is increased invisibly, and otherwise, the environment and the pollution and the damage are caused suddenly. Therefore, the environmental absorbability of the existing geotextile needs to be improved.

The prior art with publication number CN108978030A discloses a production process of degradable geotextile, comprising: 1. a step of opening the plant fiber; 2. a step of forming a plurality of strands of single-strand fibers; 3. a step of forming a web; 4. needling and reinforcing; 5. and (5) heat setting. The geotextile can be completely and naturally decomposed in a short time, does not pollute the environment, and meets the requirements of environmental protection and economy.

SUMMERY OF THE UTILITY MODEL

In order to overcome the technical problems in the prior art, the utility model provides a biodegradable composite material provided with a 3D containing cavity, and a mulching film and a geotextile comprising the same, and the biodegradable composite material is realized by the following technical scheme:

the biodegradable composite material provided with the 3D accommodating cavity comprises a first biodegradable layer, wherein a plurality of first through holes are formed in the first biodegradable layer, and a second biodegradable layer is connected below the first biodegradable layer; a 3D accommodating cavity which protrudes outwards in the direction away from the bottom layer of the first biodegradable layer is arranged on the second biodegradable layer, and the 3D accommodating cavity and the first through hole are arranged in opposite directions; and a plurality of hot pressing points for supporting the 3D accommodating cavity are circumferentially arranged at the bottom of the 3D accommodating cavity.

Preferably, a plurality of second through holes are formed in the 3D accommodating cavity and communicated with the first through holes.

Preferably, the size of the second through hole is 10-100 μm; the size of the first through hole is 100-500 mu m.

Preferably, the diameter of the 3D accommodating cavity is 3-30mm, and the height of the 3D accommodating cavity is 1.5-15 mm.

Preferably, the first biodegradable layer is a PCL layer.

Preferably, the second biodegradable layer is a PHBV layer.

Preferably, biological fertilizer particles or plant growth regulator particles are also accommodated in the 3D accommodating cavity.

Preferably, super absorbent resin particles are further accommodated in the 3D accommodating chamber.

The utility model further provides a biodegradable composite mulching film comprising a 3D accommodating cavity on the basis of the technical scheme, which comprises a film body and is structurally characterized in that: the mulching film also comprises the biodegradable composite material provided with the 3D containing cavity, and the biodegradable composite material is connected to the bottom surface of the film body in the direction that the 3D containing cavity is far away from the film body to form the mulching film.

On the basis of the technical scheme, the utility model further provides the geotextile made of the biodegradable composite material and comprising the 3D containing cavity, which comprises a geotextile body and is structurally characterized in that: the geotextile also comprises the biodegradable composite material provided with the 3D containing cavity, and the biodegradable composite material is connected to the bottom surface of the geotextile body in the direction that the 3D containing cavity is far away from the geotextile body to form the geotextile.

The utility model has the following beneficial effects:

1. according to the utility model, the 3D containing cavity is arranged, so that the grip force of the biodegradable composite material in the use process is increased, the friction force between the biodegradable composite material and the ground is improved, and the use stability is good. On the other hand, the 3D accommodating cavity can be provided with accommodating objects, such as fertilizer particles, plant growth regulators, super absorbent resin particles and the like, and the slow release effect of the accommodating objects is exerted.

2. The biodegradable composite material is provided with the through holes, stores water sources for soil when liquid such as rainwater is used, avoids quick volatilization of the water sources, has good air permeability, and provides a suitable growing environment for plants in a relative process.

3. The material of the utility model is biodegradable material, can be completely and naturally decomposed in a short time, does not pollute the environment, and meets the requirements of environmental protection and economy.

Drawings

Fig. 1 is a schematic structural diagram of a biodegradable composite material provided with a 3D accommodating cavity.

Fig. 2 is a schematic view of the 3D accommodating chamber for accommodating objects.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Please refer to fig. 1-2. The utility model relates to a biodegradable composite material with a 3D containing cavity, and a mulching film and geotextile comprising the same, which are structurally characterized in that: the biodegradable composite material provided with the 3D accommodating cavity comprises a first biodegradable layer 11, wherein a plurality of first through holes 16 are formed in the first biodegradable layer 11, and the size of each first through hole 16 is 100-500 micrometers.

The utility model implements a 3D receiving cavity by:

(1) a second biodegradable layer 12 is attached under the first biodegradable layer 11.

(2) Be equipped with on second biodegradable layer 12 towards keeping away from the outside bellied 3D holding chamber 14 of direction of the bottom of first biodegradable layer, 3D holding chamber 14 with first through-hole 16 sets up in opposite directions, has the space 15 of holding the object in the 3D holding chamber 14. The diameter of the 3D accommodating cavity 14 is 3-30mm, and the height is 1.5-15 mm. A receiving object 17 may be disposed within the 3D receiving cavity.

(3) A plurality of hot pressing points 13 for supporting the 3D accommodating cavity are circumferentially arranged at the bottom of the 3D accommodating cavity, specifically, the hot pressing points 13 are symmetrically arranged, and the number of the hot pressing points 13 may be 3, 4, 5 or 6.

(4) The 3D accommodating cavity is provided with a plurality of second through holes 18, the size of each second through hole is 10-100 micrometers, and the second through holes 18 are communicated with the first through holes 16.

Specifically, the 3D accommodating cavity 14 of the present invention is formed by compressing the second biodegradable layer 12 through a cam during processing, and the second biodegradable layer 12 and the first biodegradable layer 11 are connected into a whole through the hot pressing points 13, or the second biodegradable layer 12 and the first biodegradable layer 11 are connected into a whole through an adhesive layer.

In order to achieve the requirements of complete natural decomposition of the biodegradable composite material in a short time, no environmental pollution and environmental protection and economy in the using process, the material of the biodegradable composite material is a biodegradable material, the first biodegradable layer 11 is a PCL layer (namely a polycaprolactone layer), and specifically, the PCL layer can be a PCL film, a PCL breathable film and a PCL perforated film, or a PCL non-woven fabric and a PCL perforated non-woven fabric. The second biodegradable layer 12 is a PHBV layer (poly 3-hydroxybutyrate-co-3 hydroxyvalerate).

On the basis of the above embodiment, the present invention further provides an embodiment of the mulching film made of biodegradable composite material and including a 3D accommodating cavity: the mulching film comprises a film body, and specifically, the mulching film further comprises the biodegradable composite material provided with the 3D containing cavity, and the biodegradable composite material is connected to the bottom surface of the film body in the direction that the 3D containing cavity is far away from the film body to form the mulching film. And secondly, biological fertilizer particles or plant growth regulator particles are also accommodated in the 3D accommodating cavity.

On the basis of the above embodiment, the present invention further provides an embodiment of the geotextile comprising the biodegradable composite material of the 3D receiving cavity, wherein the geotextile comprises: the geotextile comprises a geotextile body, and specifically, the geotextile further comprises the biodegradable composite material provided with the 3D containing cavity, and the biodegradable composite material is connected to the bottom surface of the geotextile body in the direction in which the 3D containing cavity is far away from the geotextile body to form the geotextile. Secondly, super absorbent resin particles are also accommodated in the 3D accommodating cavity.

According to the mulching film or the geotextile, the 3D containing cavity is formed, so that the grip force of the biodegradable composite material in the using process is increased, the friction force between the biodegradable composite material and the ground is improved, and the use stability is good. On the other hand, the holding objects such as fertilizer particles and plant growth regulators can be arranged in the 3D holding cavity of the mulching film, and super absorbent resin particles can be arranged in the 3D holding cavity of the geotextile.

The biodegradable composite material is provided with the through holes, can receive liquid such as rainwater to store a water source for soil and avoid quick volatilization of the water source in the process of being compounded with the mulching film body, has good air permeability and provides a relatively suitable growing environment for plants, and can filter impurities in water to play a role in preventing seepage and can store water and slowly release and self-adjust the water condition of the soil environment around the geotextile in the process of being compounded with the geotextile body.

While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the utility model is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. Biodegradable composite with 3D holding chamber, including first biodegradable layer, its characterized in that: a plurality of first through holes are formed in the first biodegradable layer, and a second biodegradable layer is connected below the first biodegradable layer; a 3D accommodating cavity which protrudes outwards in the direction away from the bottom layer of the first biodegradable layer is arranged on the second biodegradable layer, and the 3D accommodating cavity and the first through hole are arranged in opposite directions; and a plurality of hot pressing points for supporting the 3D accommodating cavity are circumferentially arranged at the bottom of the 3D accommodating cavity.

2. The biodegradable composite provided with a 3D accommodating cavity according to claim 1, wherein: the 3D accommodating cavity is provided with a plurality of second through holes, and the second through holes are communicated with the first through holes.

3. The biodegradable composite provided with a 3D accommodating cavity according to claim 2, wherein: the size of the second through hole is 10-100 mu m; the size of the first through hole is 100-500 mu m.

4. The biodegradable composite provided with a 3D accommodating cavity according to claim 1, wherein: the diameter of the 3D accommodating cavity is 3-30mm, and the height of the 3D accommodating cavity is 1.5-15 mm.

5. The biodegradable composite material provided with a 3D accommodating cavity according to any one of claims 1 to 4, wherein: the first biodegradable layer is a PCL layer.

6. The biodegradable composite material provided with a 3D accommodating cavity according to any one of claims 1 to 4, wherein: the second biodegradable layer is a PHBV layer.

7. The biodegradable composite provided with a 3D accommodating cavity according to claim 1, wherein: and biological fertilizer particles or plant growth regulator particles are also accommodated in the 3D accommodating cavity.

8. The biodegradable composite provided with a 3D accommodating cavity according to claim 1, wherein: and super absorbent resin particles are also accommodated in the 3D accommodating cavity.

9. The utility model provides a contain plastic film of biodegradable composite in 3D holding chamber, includes the membrane body, its characterized in that: the mulching film also comprises the biodegradable composite material provided with the 3D containing cavity as claimed in any one of claims 1 to 7, and the biodegradable composite material is connected to the bottom surface of the film body in the direction that the 3D containing cavity is far away from the film body to form the mulching film.

10. The utility model provides a geotechnological cloth that contains biodegradable composite of 3D holding chamber, includes the geotechnological cloth body, its characterized in that: the geotextile further comprises the biodegradable composite material provided with the 3D containing cavity as claimed in any one of claims 1 to 6 and 8, and the biodegradable composite material is connected to the bottom surface of the geotextile body in the direction that the 3D containing cavity is far away from the geotextile body to form the geotextile.