阅读说明：本技术 高耐候性的生物降解地膜结构 (High-weather-resistance biodegradable mulching film structure ) 是由 高玉尧 许文天 付琼 张秀梅 刘洋 姚艳丽 于 2021-09-16 设计创作，主要内容包括：本发明提供有高耐候性的生物降解地膜结构,包括第一防护透气层,所述第一防护透气层的下方设置有透光层,所述透光层的下方设置有交错分布的纤维层,所述纤维层的下方设置有第二防护透气层,所述第一防护透气层表面的两侧均设置有第一防护层。该高耐候性的生物降解地膜结构,通过第一防护层和第二防护层的配合使用,使得生物降解地膜结构能够对地膜的两侧进行防护的同时提高自身的结构强度,进而防止地膜铺设和埋土时土壤对地膜产生的拉扯力造成地膜产生撕裂破损,从而提高生物降解地膜的防护性能,同时通过在第一防护层和第二防护层位于疏水涂层的外侧涂覆有防虫涂层,能够对土壤进行杀菌消毒,进而避免害虫破坏生物降解地膜结构。(The invention provides a high-weather-resistance biodegradable mulching film structure which comprises a first protective air-permeable layer, wherein an air-permeable layer is arranged below the first protective air-permeable layer, fiber layers distributed in a staggered mode are arranged below the air-permeable layer, a second protective air-permeable layer is arranged below the fiber layers, and first protective layers are arranged on two sides of the surface of the first protective air-permeable layer. This biodegradable plastic film structure of high weatherability, cooperation through first inoxidizing coating and second inoxidizing coating is used, make biodegradable plastic film structure improve the structural strength of self when can protecting the both sides of plastic film, and then prevent that the plastic film from laying and the power of dragging that soil produced the plastic film when burying soil from causing the plastic film to produce and tear the damage, thereby improve the barrier propterty of biodegradable plastic film, the outside coating that is located hydrophobic coating through first inoxidizing coating and second inoxidizing coating simultaneously has the protection against insects coating, can disinfect the soil, and then avoid the pest to destroy biodegradable plastic film structure.)

1. Biodegradable plastic film structure of high weatherability, including first protection ventilative layer (1), its characterized in that: a euphotic layer (2) is arranged below the first protective breathable layer (1), fiber layers (3) which are distributed in a staggered manner are arranged below the euphotic layer (2), a second protective breathable layer (4) is arranged below the fiber layer (3), first protective layers (5) are arranged on two sides of the surface of the first protective breathable layer (1), a planting area (6) is arranged in the middle of the first protective breathable layer (1), second protective layers (7) are arranged on two sides of the surface of the second protective breathable layer (4), the first protective breathable layer (1) is provided with first light-transmitting areas (8) on two sides of the planting area (6), a second light-transmitting area (9) is arranged below the first light-transmitting area (8) of the light-transmitting layer (2), and a third light transmission area (10) is arranged below the second light transmission area (9) on the second protective breathable layer (4).

2. The highly weatherable biodegradable mulch structure according to claim 1 wherein: the positions, located in the planting area (6), of the first protective breathable layer (1), the euphotic layer (2), the fiber layer (3) and the second protective breathable layer (4) are provided with through holes distributed at intervals, and the first protective breathable layer (1), the euphotic layer (2) and the second protective breathable layer (4) are made of polylactic acid (PLA), Polycaprolactone (PCL) or Polyhydroxybutyrate (PUB).

3. The highly weatherable biodegradable mulch structure according to claim 1 wherein: the first protective layer (5) and the second protective layer (7) are made of degradable fibers, and the first protective layer (5) and the second protective layer (7) are connected to the two sides of the outer portions of the first protective breathable layer (1) and the second protective breathable layer (4) respectively in a pressing and bonding mode.

4. The highly weatherable biodegradable mulch structure according to claim 1 wherein: the fiber layer (3) is woven by vertically distributed fiber yarns.

5. The highly weatherable biodegradable mulch structure according to claim 1 wherein: the surface of the first protective breathable layer (1) is coated with an anti-oxidation coating, and the outer side, located on the anti-oxidation coating, of the first protective breathable layer (1) is coated with an insect-proof coating.

6. The highly weatherable biodegradable mulch structure according to claim 1 wherein: the light transmitting layer (2) contains light stabilizer inside, and the surface of the light transmitting layer (2) is coated with hydrophobic coating.

7. The highly weatherable biodegradable mulch structure according to claim 1 wherein: the surface of the second protective breathable layer (4) is coated with a hydrophobic coating, and the outer side, located on the hydrophobic coating, of the second protective breathable layer (4) is coated with an insect-proof coating.

8. The highly weatherable biodegradable mulch structure according to claim 1 wherein: the surfaces of the first protective layer (5) and the second protective layer (7) are coated with hydrophobic coatings, and the outer sides of the first protective layer (5) and the second protective layer (7) which are positioned on the hydrophobic coatings are coated with insect-proof coatings.

9. The highly weatherable biodegradable mulch structure according to claim 1 wherein: the areas where the first, second and third light-transmitting areas (8, 9, 10) are located are not coated with a coating.

Technical Field

The invention particularly discloses a high-weather-resistance biodegradable mulching film structure.

Background

The biodegradable mulching film refers to a plastic mulching film which can be degraded under the action of microorganisms under natural environment conditions. After the plastic film is corroded by microorganisms such as bacteria, fungi and actinomycetes, the polymer components are hydrolyzed, ionized or protonated due to the growth of cells, and are mechanically destroyed and split into oligomer fragments. Enzymes secreted by fungi or bacteria break down or oxidatively degrade water-soluble polymers into water-soluble fragments, generating new small molecule compounds, until finally breaking down into C02 and H20, which can be classified into the following types according to different classification methods:

1. according to the degradation mechanism and the destruction form, the biodegradable mulching film can be divided into a completely biodegradable mulching film and an additive type biodegradable mulching film.

The completely biodegradable mulching film is a plastic film composed of substances capable of being completely decomposed by microorganisms, the substances are mainly derived from starch, cellulose, chitosan and other polysaccharide natural materials, and the final products of degradation are C02 and H20, which can be completely absorbed by the nature and can not generate secondary pollution to the environment. The main varieties of the polylactic acid (PLA), the Polycaprolactone (PCL), the Polyhydroxybutyrate (PUB) and the like. In addition, the polyvinyl alcohol can also be completely degraded by water and microorganisms;

the additive type biodegradable mulching film is prepared by adding natural or synthetic polymer with biodegradation characteristic or biodegradation accelerator, processing aid and the like on the basis of general plastic without biodegradation characteristic and mixing. An additive-type biodegradable mulching film mainly comprises general plastic, starch, a compatilizer, an autooxidizer and a processing aid. The typical variety of the mulching film is a polyethylene starch biodegradable mulching film.

2. According to the raw materials, the biodegradable mulching film can be divided into starch-based biodegradable mulching film, cellulose-based biodegradable mulching film, blended and copolymerized mulching film of cellulose and other natural polymer materials, lignin-based biodegradable mulching film and the like.

3. According to the molding process, the biodegradable mulching film can be classified into a film type, an injection molding type, a sheet type and a foaming type.

The biodegradable mulching film is a novel ground covering film and is mainly used for ground covering to improve the temperature of soil, keep the moisture of the soil, maintain the structure of the soil and prevent pests from attacking crops and diseases caused by certain microorganisms, thereby promoting the growth of plants.

The existing partial biodegradable mulching film is easy to tear and damage on the contact surface of the biodegradable mulching film and soil due to low self-generated structural strength in the laying process, so that the protective performance of the biodegradable mulching film is reduced, and meanwhile, the protective film is not completely grown out of crops due to the self-generated degradable reason of the biodegradable mulching film, and is self-degraded in a short time period under the drastic change of the external environment, so that the weather resistance of the biodegradable mulching film is low.

Disclosure of Invention

In view of the above defects or deficiencies in the prior art, the application aims to provide a biodegradable mulching film structure with high weather resistance, which comprises a first protective breathable layer, a light transmission layer is arranged below the first protective breathable layer, fiber layers distributed in a staggered manner are arranged below the light transmission layer, a second protective breathable layer is arranged below the fiber layers, first protective layers are arranged on two sides of the surface of the first protective breathable layer, a planting area is arranged in the middle of the first protective breathable layer, second protective layers are arranged on two sides of the surface of the second protective breathable layer, first light transmission areas are arranged on two sides of the first protective breathable layer, the light transmission layer is arranged below the first light transmission area, and a third light transmission area is arranged below the second protective breathable layer.

Preferably, the positions of the first protective breathable layer, the euphotic layer, the fiber layer and the second protective breathable layer in the planting area are provided with through holes distributed at intervals, and the first protective breathable layer, the euphotic layer and the second protective breathable layer are all made of polylactic acid (PLA), Polycaprolactone (PCL) or Polyhydroxybutyrate (PUB).

Preferably, the first protective layer and the second protective layer are made of degradable fibers, and the first protective layer and the second protective layer are respectively connected to two sides of the outer portions of the first protective breathable layer and the second protective breathable layer in a pressing and bonding mode.

Preferably, the fiber layer is woven by vertically distributed fiber filaments.

Preferably, the surface of the first protective breathable layer is coated with an oxidation-resistant coating, and the outer side of the first protective breathable layer, which is located on the oxidation-resistant coating, is coated with an insect-proof coating.

Preferably, the light transmitting layer contains a light stabilizer in the inside thereof, and the surface of the light transmitting layer is coated with a hydrophobic coating layer.

Preferably, the surface of the second air-permeable protective layer is coated with a hydrophobic coating, and the outer side of the second air-permeable protective layer on the hydrophobic coating is coated with an insect-proof coating.

Preferably, the surfaces of the first protective layer and the second protective layer are coated with hydrophobic coatings, and the outer sides of the first protective layer and the second protective layer, which are positioned on the hydrophobic coatings, are coated with insect-proof coatings.

Preferably, the areas where the first, second and third light-transmitting areas are located are not coated with a coating.

Has the advantages that:

1. this biodegradable plastic film structure of high weatherability, cooperation through first inoxidizing coating and second inoxidizing coating is used, make biodegradable plastic film structure improve the structural strength of self when can protecting the both sides of plastic film, and then prevent that the plastic film from laying and the power of dragging that soil produced the plastic film when burying soil from causing the plastic film to produce and tear the damage, thereby improve the barrier propterty of biodegradable plastic film, the outside coating that is located hydrophobic coating through first inoxidizing coating and second inoxidizing coating simultaneously has the protection against insects coating, can disinfect the soil, and then avoid the pest to destroy biodegradable plastic film structure.

2. This biodegradable plastic film structure of high weatherability can protect first protection ventilative layer through the surface coating anti-oxidant coating on first protection ventilative layer, avoids the early oxidative decomposition that produces of first protection ventilative layer, can make the euphotic layer under the radiation of light through setting up light stabilizer in the inside of euphotic layer simultaneously, can get rid of or slow down the photochemical reaction possibility, prevents or postpones the ageing process of euphotic layer, and then improves biodegradable plastic film structure's weatherability.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a first protective breathable layer of the present invention;

FIG. 3 is a schematic view of a transparent layer according to the present invention;

FIG. 4 is a schematic representation of a fibrous layer of the present invention;

FIG. 5 is a schematic view of a second protective breathable layer of the present invention;

fig. 6 is a partial cross-sectional view of the structure of the present invention.

In the figure: 1. a first protective breathable layer; 2. a light transmitting layer; 3. a fibrous layer; 4. a second protective breathable layer; 5. a first protective layer; 6. a planting area; 7. a second protective layer; 8. a first light-transmitting region; 9. a second light-transmitting region; 10. and a third light-transmitting region.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

The drawings in the embodiments of the invention: the different types of hatching in the figures are not given the national standards, do not require the material of the elements, and distinguish between cross-sectional views of the elements in the figures.

Referring to fig. 1-6, the biodegradable mulching film structure with high weather resistance comprises a first protective air-permeable layer 1, a light-permeable layer 2 is arranged below the first protective air-permeable layer 1, fiber layers 3 distributed in a staggered manner are arranged below the light-permeable layer 2, a second protective air-permeable layer 4 is arranged below the fiber layers 3, first protective layers 5 are arranged on two sides of the surface of the first protective air-permeable layer 1, a planting area 6 is arranged in the middle of the first protective air-permeable layer 1, second protective layers 7 are arranged on two sides of the surface of the second protective air-permeable layer 4, first light-permeable areas 8 are arranged on two sides of the first protective air-permeable layer 1, a second light-permeable area 9 is arranged below the first light-permeable area 8, and a third light-permeable area 10 is arranged below the second protective air-permeable layer 4 and the second light-permeable area 9.

Wherein, the positions that first protection ventilative layer 1, euphotic layer 2, fibrous layer 3 and second protection ventilative layer 4 are located planting district 6 are provided with interval distribution's through-hole, utilize the through-hole so that plant the crops of planting district 6 below and burst the plastic film and grow, and the material of first protection ventilative layer 1, euphotic layer 2 and second protection ventilative layer 4 is polylactic acid PLA, polycaprolactone PCL or polyhydroxybutyrate PUB.

Wherein, first inoxidizing coating 5 and second inoxidizing coating 7 all adopt degradable fibre to make, and first inoxidizing coating 5 and second inoxidizing coating 7 all adopt the pressfitting mode of gluing to connect respectively in the outside both sides of first protection ventilative layer 1 and second protection ventilative layer 4.

The fiber layer 3 is woven by vertically distributed fiber yarns, the tensile strength of the biodegradable mulching film structure can be enhanced by the fiber layer 3, and the biodegradable mulching film structure is not prone to breaking and damage when being laid and buried in soil.

Wherein, the surface coating on first protection ventilative layer 1 has oxidation resistant coating, and the outside coating that first protection ventilative layer 1 is located oxidation resistant coating has protection against insects coating, utilizes protection against insects coating can prevent that the pest from destroying first protection ventilative layer 1, and then makes first protection ventilative layer 1 can effectually protect the top layer that biodegradable plastic film structure is located soil.

The light transmitting layer 2 contains a light stabilizer inside, the surface of the light transmitting layer 2 is coated with a hydrophobic coating, and the hydrophobic coating can prevent rainwater from eroding the light transmitting layer 2 and causing premature degradation of the light transmitting layer 2.

Wherein, the surface coating on the ventilative layer 4 of second protection has hydrophobic coating, utilizes hydrophobic coating to make the water droplet of attaching to the ventilative layer 4 surface of second protection be difficult for the gathering on the ventilative layer 4 surface of second protection, and then the water droplet can drop to soil surface under the effect of gravity, can reduce the loss of moisture content, and the outside coating that the ventilative layer 4 of second protection is located hydrophobic coating has the protection against insects coating.

The surfaces of the first protective layer 5 and the second protective layer 7 are coated with hydrophobic coatings, the hydrophobic coatings can prevent the first protective layer 5 and the second protective layer 7 from absorbing moisture in soil, the first protective layer 5 and the second protective layer 7 are prevented from being degraded too early, and the insect-proof coatings are coated on the outer sides of the first protective layer 5 and the second protective layer 7, which are located on the hydrophobic coatings.

Wherein, the regional uncoated coating at first light transmission district 8, second light transmission district 9 and third light transmission district 10 place, cooperation through first light transmission district 8, second light transmission district 9 and third light transmission district 10 is used, make external light easily pierce through the biodegradable plastic film structure of this position, and then carry out the illumination intensification to the soil in plastic film covered area, the biodegradable plastic film structure of this position preferentially produces the degradation simultaneously, make the rainwater more easily water crops through infiltrating in the middle of the soil here.

When the mulching film is laid, the second protective breathable layer 4 is covered on the soil surface, the position of the planting area 6 is placed in the planting area, and then the soil is turned over on the surface of the first protective layer 5, wherein details which are not described in detail in the description belong to the prior art which is well known to a person skilled in the art.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.