Biodegradable mulching film

Abstract

The utility model provides a biodegradable mulching film which comprises a film body, the film body comprises a quicklime layer, a carboxymethyl cellulose layer, a starch layer, an upper film layer, a PP-EVOH layer and a lower film layer which are sequentially connected from top to bottom, the upper film layer is composed of a transparent layer and black adhesive layers, the black adhesive layers are located on the two sides of the transparent layer, and the lower film layer is a porous degradable film. After the biodegradable mulching film is formed into the mulching film, the comprehensive effects of toughness, heat preservation and moisture retention are obvious, and the yield of crops can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ground films, in particular to a biodegradable ground film. Background Art

[0002] The vast majority of mulch films currently used are PE mulch films. Due to their non-degradability, while mulch film planting has made a significant contribution to my country's agricultural production, the problem of white pollution has become increasingly serious over time, threatening not only the ecological environment on which we depend for survival, but also the residual mulch film has caused a reduction in crop yields. The need to solve the white pollution problem as soon as possible has attracted the attention of relevant experts.

[0003] At present, biodegradable mulch has emerged along with the development of biodegradable plastics. Compared with traditional ordinary polyethylene mulch, its main advantage is that the mulch loses its functions of warming and retaining moisture, and decomposes into small molecules such as water and carbon dioxide after use, thereby preventing the residual film from polluting farmland soil. The physical and chemical properties of the biodegradable mulch material itself determine its poor tensile strength, which makes it impossible to carry out mechanized mulching operations in agricultural areas where mechanical operations are the main method. At present, biodegradable mulch has the disadvantages of not having toughness after being formed, which makes the surface easy to crack; it only has the function of heat preservation or moisture retention, and has a single function. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a biodegradable ground film.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a biodegradable ground film, comprising a film body, wherein the film body comprises a quicklime layer, a carboxymethyl cellulose layer, a starch layer, an upper film layer, a PP-EVOH layer and a lower film layer connected in sequence from top to bottom.

[0006] Preferably, the upper film layer is composed of a transparent layer and a black glue layer, and the black glue layer is located on both sides of the transparent layer.

[0007] Preferably, the lower membrane layer is a porous degradable membrane.

[0008] Preferably, the width of the transparent layer is 30-50 mm.

[0009] Preferably, the top of the carboxymethyl cellulose layer is fixedly connected to the quicklime layer, the bottom of the carboxymethyl cellulose layer is fixedly connected to the starch layer, the top of the upper film layer is fixedly connected to the starch layer, the bottom of the upper film layer is fixedly connected to the PP-EVOH layer, the top of the PP-EVOH layer is fixedly connected to the upper film layer, and the bottom of the PP-EVOH layer is fixedly connected to the bottom of the lower film layer.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] (1) The degradable mulch film is provided with a quicklime layer, a carboxymethyl cellulose layer and a starch layer. The carboxymethyl cellulose layer makes the mulch film tough and prevents the surface from cracking. The quicklime layer has a certain warming effect. The starch layer acts as a water retaining agent and has obvious heat preservation and moisture retention effects.

[0012] (2) The degradable mulch film has a barrier layer added to the film body, which can reduce the air permeability of the film body, prevent the evaporation of water, and cooperate with the starch layer to increase the water retention rate in the soil and enhance the moisture retention performance.

[0013] (3) The transparent layer and the black glue layer in the utility model are arranged at intervals, which can ensure sunlight for the plants and prevent the growth of weeds around the plants, thereby helping to increase crop yields.

[0014] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an overall diagram of a biodegradable mulch film of the utility model;

[0016] Lower film layer 1, PP-EVOH layer 2, transparent layer 3, black glue layer 4, starch layer 5, carboxymethyl cellulose layer 6, quicklime layer 7, upper film layer 8, and film body 9. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0019] For ease of description, spatially relative terms such as "above", "in the middle", "at one end", "at the other end", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0020] See also Figure 1 A biodegradable ground film comprises a film body 9, wherein the film body 9 comprises a quicklime layer 7, a carboxymethyl cellulose layer 6, a starch layer 5, an upper film layer 8, a PP-EVOH layer 2 and a lower film layer 1 which are sequentially connected from top to bottom.

[0021] Specifically, the upper film layer 8 is composed of a transparent layer 3 and a black glue layer 4, the black glue layer 4 is located on both sides of the transparent layer 3, and the lower film layer 1 is a porous degradable film.

[0022] Furthermore, the width of the transparent layer 3 is 30-50 mm.

[0023] Furthermore, the top end of the carboxymethyl cellulose layer 6 is fixedly connected to the quicklime layer 7, the bottom end of the carboxymethyl cellulose layer 6 is fixedly connected to the starch layer 5, the top end of the upper film layer 8 is fixedly connected to the starch layer 5, the bottom end of the upper film layer 8 is fixedly connected to the PP-EVOH layer 2, the top end of the PP-EVOH layer 2 is fixedly connected to the upper film layer 8, and the bottom end of the PP-EVOH layer 2 is fixedly connected to the bottom end of the lower film layer 1.

[0024] Working principle of the utility model: the materials selected in the utility model are all degradable biological materials, and the exothermic alkaline material characteristics of quicklime are used to increase the temperature. The carboxymethyl cellulose layer has the function of a reinforcing agent to improve the toughness of the film. The starch layer can absorb moisture to ensure that soil moisture is not lost. The transparent layer is located on the ridges, and the black glue layer is located between the ridges to ensure the photosynthesis of the plants, reduce the photosynthesis of weeds between the ridges, inhibit their growth, reduce the weeds from competing for nutrients for the plants, and help increase crop yields. The PP-EVOH layer can reduce the penetration and loss of moisture, and at the same time prevent it from being hydrolyzed when it comes into contact with water. Embodiment 1:

[0025] A biodegradable ground film comprises a film body 9, wherein the film body 9 comprises a quicklime layer 7, a carboxymethyl cellulose layer 6, a starch layer 5, an upper film layer 8, a PP-EVOH layer 2 and a lower film layer 1 which are sequentially connected from top to bottom.

[0026] The upper film layer 8 is composed of a transparent layer 3 and a black glue layer 4, wherein the black glue layer 4 is located on both sides of the transparent layer 3, and the lower film layer 1 is a porous degradable film. The width of the transparent layer 3 is 30-50 mm. Embodiment 2:

[0027] A biodegradable ground film comprises a film body 9, wherein the film body 9 comprises a quicklime layer 7, a carboxymethyl cellulose layer 6, a starch layer 5, an upper film layer 8, a PP-EVOH layer 2 and a lower film layer 1 which are sequentially connected from top to bottom.

[0028] The upper film layer 8 is composed of a transparent layer 3 and a black glue layer 4, wherein the black glue layer 4 is located on both sides of the transparent layer 3, and the lower film layer 1 is a porous degradable film. The width of the transparent layer 3 is 30-50 mm.

[0029] The top end of the carboxymethyl cellulose layer 6 is fixedly connected to the quicklime layer 7, the bottom end of the carboxymethyl cellulose layer 6 is fixedly connected to the starch layer 5, the top end of the upper film layer 8 is fixedly connected to the starch layer 5, the bottom end of the upper film layer 8 is fixedly connected to the PP-EVOH layer 2, the top end of the PP-EVOH layer 2 is fixedly connected to the upper film layer 8, and the bottom end of the PP-EVOH layer 2 is fixedly connected to the bottom end of the lower film layer 1.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A biodegradable mulch film, characterized in that: The invention comprises a film body (9), wherein the film body (9) comprises a quicklime layer (7), a carboxymethyl cellulose layer (6), a starch layer (5), an upper film layer (8), a PP-EVOH layer (2) and a lower film layer (1) which are connected in sequence from top to bottom.

2. The biodegradable mulch film according to claim 1, characterized in that: The upper film layer (8) is composed of a transparent layer (3) and a black glue layer (4), and the black glue layer (4) is located on both sides of the transparent layer (3).

3. The biodegradable mulch film according to claim 1, characterized in that: The lower film layer (1) is a porous degradable film.

4. The biodegradable mulch film according to claim 2, characterized in that: The width of the transparent layer (3) is 30-50 mm.

5. The biodegradable mulch film according to claim 1, characterized in that: The top end of the carboxymethyl cellulose layer (6) is fixedly connected to the quicklime layer (7), the bottom end of the carboxymethyl cellulose layer (6) is fixedly connected to the starch layer (5), the top end of the upper film layer (8) is fixedly connected to the starch layer (5), the bottom end of the upper film layer (8) is fixedly connected to the PP-EVOH layer (2), the top end of the PP-EVOH layer (2) is fixedly connected to the upper film layer (8), and the bottom end of the PP-EVOH layer (2) is fixedly connected to the bottom end of the lower film layer (1).

Images