CN113424734A

CN113424734A - Hot-melt composite hydrophilic drainage cooling device and application thereof

Info

Publication number: CN113424734A
Application number: CN202110681137.8A
Authority: CN
Inventors: 邢志强
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2021-09-24
Anticipated expiration: 2041-06-18
Also published as: CN113424734B

Abstract

The invention relates to a hot-melt composite hydrophilic drainage cooling device and application thereof. The hot-melting composite hydrophilic drainage cooling device comprises a plurality of drainage wires and connecting wires connected with the drainage wires; the drainage wire and the connecting wire are arranged in a crossed manner; the drainage wire comprises a hydrophilic surface layer and a base layer, and the hydrophilic surface layer and the base layer are compounded through hot melting; the hydrophilic surface layer is provided with a first hydrophilic outer surface, and the hydrophilic degree of the first hydrophilic outer surface reaches a first contact angle theta with water₁< 60 deg. The hot-melt composite hydrophilic drainage cooling device has a good cooling effect, can still keep good tensile strength and bending resistance in a long-term sun-drying, wind-blowing and water-soaking environment, and has a long service life.

Description

Hot-melt composite hydrophilic drainage cooling device and application thereof

Technical Field

The invention relates to the technical field of greenhouse cooling, in particular to a hot-melt composite hydrophilic drainage cooling device and application thereof.

Background

In high-temperature seasons, the temperature in the greenhouse is too high, and the agricultural production is influenced; the common sunshade net of warmhouse booth, insect-proof net are hydrophobic polymer resin material at present, and the water that falls on it can't spread along its surface and pave into the water film, but rolls with the drop form, assembles and flows to fall to ground, forms the waterlogging, corrodes the rack, and the cooling range is little. And the greenhouse environment is exposed to the sun and wind for a long time, so that the requirement on the strength of the material is high.

Disclosure of Invention

Based on this, it is necessary to provide a hot-melt composite hydrophilic drainage cooling device which has a good cooling effect, can still maintain good tensile strength and bending resistance and has a long service life in the environment of long-term exposure to wind, and water.

In a first aspect of the present invention, a hot-melt composite hydrophilic drainage cooling device is provided, which comprises:

the drainage device comprises a plurality of drainage wires and connecting wires connected with the drainage wires; the drainage wire and the connecting wire are arranged in a crossed manner; the drainage wire comprises a hydrophilic surface layer and a base layer, wherein the hydrophilic surface layer and the base layer are compounded through hot melting; the hydrophilic surface layer is provided with a first hydrophilic outer surface, and the hydrophilic degree of the first hydrophilic outer surface reaches a first contact angle theta with water₁＜60°。

In one embodiment, the hot melt compounding manner comprises co-extrusion compounding and/or hot press compounding.

In one embodiment, the material of the hydrophilic surface layer includes a first polymer resin; the material of the base layer includes a second polymer resin.

In one embodiment, the first polymer resin contains a first polymer segment, and the second polymer resin contains a second polymer segment; the first polymer segment and the second polymer segment can form crystals; and the hydrophilic surface layer and the base layer are subjected to hot melting compounding and then form crystals at an interface by the first polymer chain segment and the second polymer chain segment.

In one embodiment, the first polymer segment and the second polymer segment are selected from the group consisting of a polyethylene segment, a polypropylene segment, a polyester segment, and a polyamide segment.

In one embodiment, the first polymer segment and the second polymer segment both belong to polyethylene segments, the first polymer resin is selected from hydrophilic modified polyethylene and/or hydrophilic modified ethylene-non-olefin unsaturated monomer copolymer, and the second polymer resin is selected from one or more of polyethylene, ethylene-non-olefin unsaturated monomer copolymer, graft modified polyethylene and graft modified ethylene-non-olefin unsaturated monomer copolymer;

or the first polymer chain segment and the second polymer chain segment both belong to polypropylene chain segments, the first polymer resin is hydrophilic modified polypropylene, and the second polymer resin is selected from polypropylene and/or graft modified polypropylene;

or the first high molecular chain segment and the second high molecular chain segment both belong to polyester chain segments, the first high molecular resin is hydrophilic modified polyester, and the second high molecular resin is selected from polyester and/or graft modified polyester which has the same dibasic acid and diol component which form polycondensation with the first high molecular resin;

or the first high molecular chain segment and the second high molecular chain segment both belong to polyamide chain segments, the first high molecular resin is hydrophilic modified polyamide, and the second high molecular resin is selected from polyamide and/or graft modified polyamide which has the same diacid and diamine component which form polycondensation with the first high molecular resin.

In one embodiment, the hydrophilic surface layer and the base layer form chemical bond connection at the interface after hot melt compounding.

In one embodiment, the chemical bond is selected from one or more of the group consisting of a chemical bond connection of an epoxy group to an anhydride, a chemical bond connection of an epoxy group to an amino group, a chemical bond connection of an isocyanate group to an active hydrogen-containing molecule, a chemical bond connection of a hydroxyl group to a carboxyl group, a chemical bond connection of an amino group to a carboxyl group, a chemical bond connection of a silicon hydroxyl group to a silicon hydroxyl group, a chemical bond connection of an unsaturated group to an unsaturated group, a chemical bond connection of an unsaturated group grafted onto a molecular chain, and a chemical bond connection formed by aldol condensation.

In one embodiment, a surface of the base layer remote from the hydrophilic surface layer is provided with a base layer.

In one embodiment, the substrate layer comprises a third auxiliary agent; the third auxiliary agent is selected from one or more of a sterilization algicide, a repellent, magnetic powder, a flame retardant, a stabilizer, a coloring agent, an infrared light reflecting material, a photoluminescence material and a reversible thermochromism material.

In one embodiment, the hydrophilic surface layer comprises a first auxiliary agent therein; the first auxiliary agent is selected from one or more of a sterilization algicide, a repellent, magnetic powder, a flame retardant, a stabilizer, a coloring agent, an infrared light reflecting material, a photoluminescence material, a reversible thermochromism material and hydrophilic powder; and/or the presence of a catalyst in the reaction mixture,

the base layer comprises a second auxiliary agent; the second auxiliary agent is selected from one or more of a sterilization algicide, a repellent, magnetic powder, a flame retardant, a stabilizer, a coloring agent, an infrared light reflecting material, a photoluminescence material and a reversible thermochromism material.

In one embodiment, one end of the drainage wire is used for contacting with the greenhouse, and the other end of the drainage wire is used for extending to a preset area on the ground beside the greenhouse.

In one embodiment, the connecting wire is fixedly connected with the intersection part of a plurality of the drainage wires; or the hot-melt composite hydrophilic drainage cooling device is formed by weaving a plurality of drainage wires; or the hot-melt composite hydrophilic drainage cooling device is formed by shearing the hot-melt composite hydrophilic sheet into the drainage wire and the connecting wire.

In one embodiment, the connecting wire comprises a first connecting wire arranged at one end of the drainage wire and a second connecting wire arranged at the other end of the drainage wire; and the adjacent two drainage wires, the first connecting wire and the second connecting wire form a pore.

The second aspect of the invention provides the application of the hot-melt composite hydrophilic drainage cooling device in cooling of a greenhouse.

The third aspect of the invention provides a greenhouse cooling system, which comprises a greenhouse body, a water supply device and the hot-melt composite hydrophilic drainage cooling device;

the hot-melt composite hydrophilic drainage cooling device is installed on the greenhouse body, water flows out of the water supply device and flows through the hot-melt composite hydrophilic drainage cooling device.

The hot-melt composite hydrophilic drainage cooling device provided by the invention has the advantages that the hydrophilic surface layer and the base layer are compounded through hot melting to form the drainage wire, and the hydrophilic surface layer is pulled by the base layer, so that the device has the following advantages:

(1) in the using process, water can be spread into a thin water film to be evaporated and cooled, and the cold energy in the water is also subjected to heat exchange with the environment in the greenhouse for cooling;

(2) when the air conditioner is applied near the side air outlet of the greenhouse, the temperature of hot air entering the greenhouse can be reduced, so that the temperature and the humidity in the greenhouse are reduced;

(3) the water can be drained to a preset area on the side edge of the greenhouse, so that the water is prevented from flowing to the ground along the greenhouse covering, and a greenhouse frame is prevented from being waterlogged and corroded;

(4) water circulation can be realized;

(5) the water immersion is repeated for a long time, the good tensile strength and bending resistance are still kept, and the service life is long;

(6) after long-term repeated water immersion, the overall shape and size of the device are not obviously changed, even if some examples of hydrophilic surface layers slightly absorb water and expand, the hot-melt composite hydrophilic drainage cooling device still has no obvious extension along the laying direction under the drawing action of the base layer, and the device is particularly suitable for being used in a greenhouse under the environment of wind blowing and sunshine and long-term water immersion;

(7) the bonding firmness of the hydrophilic surface layer and the base layer is high;

(8) the production process is simple, a large amount of solvent is not needed, the production is safe and environment-friendly, the occupied space is small, and the production speed is high;

(9) the production cost is low, the use cost is low, and the maintenance cost is low.

Drawings

FIG. 1 is a schematic cross-sectional view of a drainage wire according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of another embodiment of a drainage wire of the present invention;

FIG. 3 is a schematic cross-sectional view of a drainage wire according to yet another embodiment of the present invention;

FIG. 4 is a cross-sectional view of a drainage wire according to yet another embodiment of the present invention;

FIG. 5 is a schematic structural view of a hot-melt composite hydrophilic drainage cooling device installed in a greenhouse according to an example of the present invention;

FIG. 6 is a schematic structural diagram of a hot-melt composite hydrophilic sheet sheared to form two hot-melt composite hydrophilic drainage cooling devices according to an example of the present invention;

FIG. 7 is a schematic structural view of a connection manner of a drainage wire and a connecting wire of a hot-melt composite hydrophilic drainage cooling device according to another example of the present invention;

FIG. 8 is a schematic structural view of a hot-melt composite hydrophilic drainage cooling device and a film pressing rope according to another embodiment of the present invention;

FIG. 9 is a schematic structural view of the hot-melt composite hydrophilic drainage cooling device shown in FIG. 8 mounted on a covering;

FIG. 10 is a schematic structural view of a covering with a thermally fused composite hydrophilic drainage cooling device according to an exemplary embodiment of the present invention;

100. a greenhouse; 10. a shed frame; 20. a cover; 211. the upper edge of the side air outlet; 30. a hot-melting composite hydrophilic drainage cooling device; 31. a drainage wire; 311. a hydrophilic surface layer; 312. a base layer; 313. a base layer; 32. connecting wires; 321. a first connecting wire; 322. a second connecting wire; 3221. cutting a second connecting wire; 323. a third connecting wire; 34. pulling down the tie bar; 40. a water collection device; 50. film pressing ropes; 91. a water distribution device; 92. a water pump; 93. a water delivery pipeline; 95. a water storage device; 96. and (4) a filtering device.

Detailed Description

The hot-melt composite hydrophilic drainage cooling device and the application thereof are further described in detail with reference to the following specific embodiments. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The symbol "°" means: degree is a measure of the magnitude of the contact angle.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

The greenhouse film and the greenhouse film are commonly called terms in convention, are not limited to be laid on a greenhouse, and also comprise to be laid on a greenhouse and an arched shed; the method comprises the steps of laying on a single greenhouse, and laying on multi-span greenhouses; the method comprises the step of laying on a fold line-shaped greenhouse, and also comprises the step of laying on an arc-shaped greenhouse.

The term "greenhouse film" is used herein only as a representative of the attachment surface of the present invention, i.e., for application to plastic film greenhouses, and the present invention also includes application to sunlight or glass greenhouses.

The "plurality" is two or more herein; as used herein, "multilayer" is two or more layers; as used herein, "plurality" is two or more.

The greenhouse is commonly known in the industry and can be also called as a greenhouse, a greenhouse or an arched greenhouse.

Suitable objects of the greenhouse comprise microorganisms such as plants, animals or edible fungi.

The hot-melt composite hydrophilic sheet material is a semi-finished sheet material with hydrophilic outer surface, which is formed by hot-melt compounding raw materials of all layers in the process of producing the drainage wire, and the drainage wire can be obtained by simple physical deformation such as stretching, shearing and the like and basically keeping the position relation of all layers on the cross section of the drainage wire in a stable state in the physical deformation process.

The invention provides a hot-melt composite hydrophilic drainage cooling device, which comprises a plurality of drainage wires and connecting wires connected with the drainage wires; the drainage wire and the connecting wire are arranged in a crossed manner; the drainage wire comprises a hydrophilic surface layer and a base layer, and the hydrophilic surface layer and the base layer are compounded through hot melting; the hydrophilic surface layer is provided with a first hydrophilic outer surface, and the hydrophilic degree of the first hydrophilic outer surface reaches a first contact angle theta with water₁＜60°。

The hot-melt composite hydrophilic drainage cooling device is formed by arranging drainage wires and connecting wires in a crossed manner, wherein the drainage wires comprise hydrophilic surface layers and base layers which are compounded in a hot-melt manner; the hydrophilic surface layer provides good hydrophilicity, the surface tension of water is destroyed, the water selectively flows to a preset area along the hot-melt composite hydrophilic drainage cooling device, and hardly leaks to the ground along a covering and a film pressing rope of the greenhouse, so that waterlogging is prevented, and a greenhouse frame is prevented from being corroded; spreading water on the hydrophilic surface layer to form a thin water film, evaporating, and performing heat exchange to reduce the temperature; the base layer has better water soaking resistance, and has no obvious expansion deformation and no obvious reduction of tensile strength and bending resistance after being soaked in water for a long time; after the hydrophilic surface layer and the base layer are compounded in a hot melting mode, the good hydrophilicity of the hydrophilic surface layer is combined with the good water soaking resistance of the base layer, and the hydrophilic surface layer is pulled by the base layer, so that even if the hydrophilic surface layer absorbs water to expand to a certain degree after being soaked for a long time, the hydrophilic surface layer tends to slightly expand and thicken along the thickness direction of the drainage wire under the pulling action of the base layer, and is difficult to expand and extend along the laying direction of the hot-melting composite hydrophilic drainage cooling device, and the phenomenon that the hot-melting composite hydrophilic drainage cooling device loosens due to the expansion and extension of water absorption or water side leakage is caused after a concave pocket affects drainage is prevented; and after the hot-melt composite hydrophilic drainage cooling device is soaked in water for a long time, the tensile strength and the bending resistance of the hot-melt composite hydrophilic drainage cooling device are prevented from being remarkably reduced due to the fact that the hydrophilic surface layer absorbs water and swells, and the tensile strength and the bending resistance of the hot-melt composite hydrophilic drainage cooling device are remarkably reduced, so that the hot-melt composite hydrophilic drainage cooling device is prevented from being broken and damaged in the use environment of a greenhouse soaked in wind, sunlight and water.

In some of these examples, the first contact angle θ₁< 60 degrees. Specifically, the first contact angle θ₁The degrees of (c) include, but are not limited to: 59 degrees, 55 degrees, 45 degrees, 39 degrees, 25 degrees, 11 degrees, 1 degree.

As shown in fig. 1, in some examples, the drainage wire 31 is a three-layer hot melt composite, and two hydrophilic surface layers 311 are disposed on two sides of the base layer 312.

As shown in fig. 2, in some examples, the hydrophilic surface layer 311 and the base layer 312 are double-layered hot-melt compounded, that is, one side of the drainage wire 31 is the hydrophilic surface layer 311, and the other side is the base layer 312. The formed drainage wire is positioned at the first contact angle theta of one side of the hydrophilic surface layer 311 and water₁< 60 degrees. Thus, the water naturally tends to move along the hydrophilic surface layer 311 and spread out when contacting the drainage wire 31.

In some of these examples, the base layer is a single layer. In other examples, the base layer is formed by compounding multiple layers.

In some examples, the cross section of the drainage wire is circular, the hydrophilic surface layer and the base layer are arranged in a concentric circle, the base layer is positioned on the inner side of the concentric circle, and the hydrophilic surface layer is positioned on the outer side and wraps the base layer.

In some of these examples, the hot melt compounding is by co-extrusion compounding. In the co-extrusion compounding process, the components of each layer are respectively extruded together layer by layer from a plurality of extruders with the same compounding die head, and are compounded into a whole inside and outside the compounding die head, and the continuity of each layer is basically kept.

In other examples, the hot-melt compounding is hot-press compounding: the components of each layer are respectively made into sheets, then the sheets are sequentially laminated and compounded into a whole through common heating and extrusion.

It is understood that when the drainage wire has a multi-layer structure, co-extrusion compounding and thermo-compression compounding may be used in combination. Specifically, after the first hydrophilic surface layer and the base layer form the double-layer co-extrusion composite sheet, the surface of the base layer, which is far away from the first hydrophilic surface layer, and the second hydrophilic surface layer are formed by hot-pressing and compounding. Therefore, the drainage wire with the hydrophilic surface layers compounded on both sides of the base layer through hot melting can be formed.

In some examples, the material of the hydrophilic surface layer includes a first polymer resin; the material of the base layer includes a second polymer resin.

In some of these examples, the first polymer resin contains a first polymer segment, and the second polymer resin contains a second polymer segment; the first polymer chain segment and the second polymer chain segment can form crystals; the hydrophilic surface layer and the base layer are subjected to hot melting compounding and then form crystals at an interface by the first polymer chain segment and the second polymer chain segment.

It is to be understood that the crystallization according to the present invention includes co-crystallization. When the first polymer resin and the second polymer resin are the same polymer resin, the first polymer resin and the second polymer resin form crystals through a first polymer chain segment and a second polymer chain segment; when the first polymer resin and the second polymer resin are different polymer resins, the first polymer resin and the second polymer resin form a cocrystal through the first polymer chain segment and the second polymer chain segment of the same type.

So, lie in near interface between hydrophilic top layer and the basic unit, no matter have or not take place chemical reaction, can both be in the same place through the firm inseparable combination of crystallization, show the tractive effect that has improved the basic unit to hydrophilic top layer.

Further, the first polymer segment and the second polymer segment are selected from a polyethylene segment, a polypropylene segment, a polyester segment or a polyamide segment in the same category.

In some examples, the first polymer segment and the second polymer segment both belong to a polyethylene segment, and the first polymer resin is selected from a hydrophilic modified polyethylene and/or a hydrophilic modified ethylene-non-olefin unsaturated monomer copolymer, as a specific example, the hydrophilic modification is graft modification, and the corresponding graft monomer is not limited to acrylic acid, sodium acrylate, allyl polyoxyethylene ether, and the like, and is not limited herein; the second high molecular resin is selected from one or more of polyethylene, ethylene-non-olefin unsaturated monomer copolymer, graft modified polyethylene and graft modified ethylene-non-olefin unsaturated monomer copolymer; in some of these examples, the polyethylene is selected from one or more combinations of HDPE, LDPE, LLDPE, and metallocene polyethylene; the ethylene-non-olefin unsaturated monomer copolymer is selected from ethylene-vinyl acetate copolymer EVA and/or ethylene-vinyl alcohol copolymer.

As a specific example, the first polymer resin is hydrophilic modified EVA, the second polymer resin is HDPE, and after hot-melt compounding, the hydrophilic surface layer and the base layer form co-crystallization at the interface through a polyethylene chain segment.

In some examples, the first polymer segment and the second polymer segment both belong to a polypropylene segment, the first polymer resin is hydrophilic modified polypropylene, and the second polymer resin is selected from polypropylene and/or graft modified polypropylene;

in some examples, the first polymer segment and the second polymer segment are both polyester segments, the first polymer resin is a hydrophilic modified polyester, and the second polymer resin is selected from a polyester and/or a graft modified polyester having the same dibasic acid and diol components that form condensation polymerization with the first polymer resin. For example, when the first polymer resin is a hydrophilic modified PET, the second polymer resin is PET and/or graft-modified PET.

In some examples, the first polymer segment and the second polymer segment are both polyamide segments, the first polymer resin is a hydrophilic modified polyamide, and the second polymer resin is selected from polyamide and/or graft modified polyamide having the same diacid and diamine component that forms condensation polymerization with the first polymer resin. In some specific examples, when the first polymeric resin is a hydrophilically modified polyhexamethylene adipamide, polyhexamethylene sebacamide, or polyhexamethylene dodecanoamide, the second polymeric resin is the corresponding polyhexamethylene adipamide, polyhexamethylene sebacamide, or polyhexamethylene dodecanoamide, or a graft-modified analogous corresponding polyamide as described above.

In some examples, the hydrophilic surface layer and the base layer form chemical bonds at the interface after hot-melt compounding. Thus, the hydrophilic surface layer and the base layer can be firmly connected together through chemical bonds no matter whether the hydrophilic surface layer and the base layer contain polymer chain segments capable of crystallizing or not, or whether the interface of the hydrophilic surface layer and the base layer is compatible or not.

In some examples, the chemical bond linkage is selected from the group consisting of one or more of a chemical bond linkage of an epoxy group to an anhydride, a chemical bond linkage of an epoxy group to an amino group, a chemical bond linkage of an isocyanate group to an active hydrogen-containing molecule, a chemical bond linkage of a hydroxyl group to a carboxyl group, a chemical bond linkage of an amino group to a carboxyl group, a chemical bond linkage of a silicon hydroxyl group to a silicon hydroxyl group, a chemical bond linkage of an unsaturated group to an unsaturated group, a chemical bond linkage of an unsaturated group grafted onto a molecular chain, and a chemical bond linkage formed by aldol condensation. The active hydrogen-containing molecule includes: a hydroxyl-containing molecule, an amino-containing molecule, or a phenolic hydroxyl-containing molecule.

In some examples, the chemical bond is a chemical bond of an epoxy group and an acid anhydride, and the first polymer resin is selected from hydrophilic polyethylene prepared by co-grafting and modifying glycidyl methacrylate and sodium acrylate; the second polymer resin is selected from maleic anhydride grafted polypropylene, the hydrophilic surface layer and the base layer are coextruded and compounded, and are kept warm and placed still, and chemical bond connection is formed at the interface of the hydrophilic surface layer and the base layer.

In some examples, the chemical bond connection is the chemical bond connection of an epoxy group and an amino group, and the hydrophilic surface layer is an aminosilane-hydrophilic modified PVC interpenetrating network structure sheet; the base layer is a sheet material of which the second polymer resin is selected from glycidyl methacrylate grafted PE, the hydrophilic surface layer and the base layer are compounded in a hot pressing mode, and the amino group of the hydrophilic surface layer and the epoxy group of the base layer form chemical bond connection at the interface.

In some examples, the surface of the base layer has a second contact angle θ with water₂More than 70 degrees; preferably, the surface of the base layer has a second contact angle θ with water₂More than 80 degrees; more preferably, the second contact angle θ of the surface of the base layer with water₂The temperature is more than or equal to 90 degrees.

In some examples, the second polymer resin of the base layer is a thermoplastic resin (commercially available) that can be repeatedly thermoformed as a main raw material for thermoplastic appliances; the thermoplastic resin has good water resistance, and after the thermoplastic resin is soaked in water near the normal temperature for a long time, the shape is basically unchanged, and the tensile strength and the bending resistance can not be obviously reduced, so that the drainage wire can be basically prevented from expanding and lengthening along the stretching direction after being soaked for a long time, and the tensile strength and the bending resistance can not be obviously reduced; such thermoplastic resins include non-crystalline thermoplastic resins and crystalline thermoplastic resins, and the specific kind is not limited, and one or more combinations of a wire drawing grade, a blow molding grade, a film grade, an extrusion grade, or an injection molding grade are preferable. Preferably, when the second polymer resin of the base layer is such an amorphous thermoplastic resin, the second contact angle θ of the surface of the base layer with water₂A second contact angle theta of > 80 degrees, more preferably, the surface of the substrate with water₂The temperature is more than or equal to 90 ℃; when the second polymer resin of the base layer is such a crystalline thermoplastic resin, it is preferable that the second contact angle θ of the surface of the base layer with water is the second contact angle θ of the surface of the base layer with water because of the existence of the crystalline region₂More than 70 degrees; more preferably, the second contact angle θ of the surface of the base layer with water₂> 80 degrees.

Further, as shown in fig. 3, in some examples, on a surface of the base layer 312 remote from the hydrophilic surface layer 311, a base layer 313 is provided.

In some examples, the substrate layer is a high-strength water-resistant material, and the substrate layer further retains the tensile strength of the drainage wire after long-term immersion in water. Specifically, the method comprises the following steps: the main components of the hydrophilic surface layer are hydrophilic modified polypropylene, the main components of the base layer are 40 parts by weight of polypropylene, 20 parts by weight of ethylene propylene diene monomer copolymer and 40 parts by weight of LDPE, and the base layer is wire-drawing-grade HDPE.

In other examples, the substrate layer is a hot melt adhesive layer to facilitate secure attachment of the drain wires to a material such as tie wires.

In other examples, the base layer provides an auxiliary function for the drainage wire, and specifically, for example, aluminum powder is added into the base layer, so that the drainage wire has a light reflecting function, and further cooling is performed.

As shown in fig. 4, in some examples, two sides of the substrate layer 313 are respectively provided with a base layer 312, and a hydrophilic surface layer 311 is respectively provided on the surface of each base layer away from the substrate layer, so as to form a five-layer hot-melt composite structure. In this way, the substrate layer can be compounded of two materials that are incompatible on both surfaces thereof.

In some of these examples, the base layer is integrally heat-fused to the base layer.

In some examples, the material of the base layer includes a third polymer resin containing a third polymer chain segment, the material of the base layer includes a second b polymer chain segment, and the second b polymer chain segment and the third polymer chain segment are capable of forming crystals; and after the base layer and the substrate layer are subjected to hot melting compounding, crystals are formed at an interface by the second b high molecular chain segment and the third high molecular chain segment.

In some of these examples, the second b polymer segment is selected from the group consisting of a polyethylene segment, a polypropylene segment, a polyester segment, or a polyamide segment, of the same type as the third polymer segment.

In some examples, the second b polymer segment and the third polymer segment both belong to a polyethylene segment, the second b polymer resin is selected from one or more combinations of polyethylene, an ethylene-non-olefin unsaturated monomer copolymer, a graft-modified polyethylene, and a graft-modified ethylene-non-olefin unsaturated monomer copolymer, and the third polymer resin is selected from one or more combinations of polyethylene, an ethylene-non-olefin unsaturated monomer copolymer, a graft-modified polyethylene, and a graft-modified ethylene-non-olefin unsaturated monomer copolymer;

in some examples, the second b polymer segment and the third polymer segment are both polypropylene segments, the second b polymer resin is selected from polypropylene and/or graft-modified polypropylene, and the third polymer resin is selected from polypropylene and/or graft-modified polypropylene;

in some examples, the second b polymer segment and the third polymer segment are both polyester segments, the second b polymer resin is selected from polyester and/or graft-modified polyester, and the third polymer resin is selected from polyester and/or graft-modified polyester having the same dibasic acid and diol component that form condensation polymerization with the second b polymer resin;

in some examples, the second b polymer segment and the third polymer segment are both polyamide segments, the second b polymer resin is selected from polyamide and/or graft-modified polyamide, and the third polymer resin is selected from polyamide and/or graft-modified polyamide having the same diacid and diamine component that forms condensation polymerization with the second b polymer resin.

In some examples, the substrate layer and the base layer are thermally fused to form chemical bonds at the interface. As some specific examples, the chemical bond linkage is selected from one or more of the group consisting of a chemical bond linkage of an epoxy group to an anhydride, a chemical bond linkage of an epoxy group to an amino group, a chemical bond linkage of an isocyanate group to an active hydrogen-containing molecule, a chemical bond linkage of a hydroxyl group to a carboxyl group, a chemical bond linkage of an amino group to a carboxyl group, a chemical bond linkage of a silicon hydroxyl group to a silicon hydroxyl group, a chemical bond linkage of an unsaturated group to an unsaturated group, a chemical bond linkage of an unsaturated group grafted onto a molecular chain, and a chemical bond linkage formed by aldol condensation. The active hydrogen-containing molecules include: a hydroxyl-containing molecule, an amino-containing molecule, or a phenolic hydroxyl-containing molecule.

In some examples, the hydrophilic surface layer contains hydrophilic groups in an amount to provide a first contact angle θ of the hydrophilic surface layer with water₁< 60 degrees.

In some of these examples, the hydrophilic group is part of the first polymeric resin. In other examples, the molecules in which the hydrophilic groups are located form an interpenetrating network structure with the first polymeric resin. Therefore, the hydrophilic groups are firmly present in the hydrophilic surface layer, and the hot-melt composite hydrophilic drainage cooling device can keep hydrophilic even if the device is repeatedly stretched, bent, folded and soaked for a long time.

In some of these examples, the hydrophilic group is selected from the group consisting of polyoxyethylene groups, hydroxyl groups, phenolic hydroxyl groups, silicon hydroxyl groups, carboxyl groups, carboxylate groups, amine groups, alcohol amine groups, amide groups, alcohol amide groups, quaternary ammonium groups, zwitterionic groups, phosphate groups, sulfate groups, sulfonate groups, and combinations of one or more of the sulfonate groups.

During the production process, the amount of hydrophilic groups is increased until a first contact angle θ between the first hydrophilic outer surface of the hydrophilic surface layer and water₁< 60 degrees.

Additionally, in some of these examples, the hydrophilic skin layer comprises a first adjunct; the first auxiliary agent is selected from one or more of bactericidal algicide, repellent, magnetic powder, flame retardant, stabilizer, colorant, infrared light reflecting material, photoluminescence material, reversible thermochromism material and hydrophilic powder. Furthermore, the dosage of the first auxiliary agent is 0.1-25% of the mass percentage of the hydrophilic surface layer. The amount is suitably selected within the range depending on the kind of the auxiliary.

In some of these examples, the base layer comprises a second auxiliary agent; the second auxiliary agent is selected from one or more of a sterilization algicide, a repellent, magnetic powder, a flame retardant, a stabilizer, a coloring agent, an infrared light reflecting material, a photoluminescence material and a reversible thermochromism material. Furthermore, the dosage of the second auxiliary agent is 0.1-25% of the mass percentage of the base layer. The amount is suitably selected within the range depending on the kind of the auxiliary.

In some of these examples, the base layer comprises a third adjuvant; the third auxiliary agent is selected from one or more of a sterilization algicide, a repellent, magnetic powder, a flame retardant, a stabilizer, a coloring agent, an infrared light reflecting material, a photoluminescence material and a reversible thermochromism material. Furthermore, the dosage of the third additive accounts for 0.1-25% of the mass percentage of the base layer. The amount is suitably selected within the range depending on the kind of the auxiliary.

Wherein, the sterilization algicide prevents the drainage wires from breeding fungi and algae in water and light environment. In one example, the bactericidal algicide is selected from one or more of heavy metals and compounds thereof, boron series bactericidal algicide and sulfur series bactericidal algicide. Specifically, the bactericidal algicide is selected from one or more of copper, silver, zinc, copper oxide, cuprous oxide, silver oxide, zinc oxide, basic copper carbonate, copper hydroxide, zinc borate and sulfur.

The repellent prevents or reduces animals, snakes, birds or arthropods from passing through the hot-melt composite hydrophilic drainage cooling device to enter or exit the greenhouse. In one example, the repellent is selected from the group consisting of pungent, bitter, astringent, odorous, purgative, biocidal and antifeedant agents.

The magnetic powder is attracted by a steel frame of the greenhouse, so that the hot-melt composite hydrophilic drainage cooling device is tightly attached to the steel frame.

The flame retardant is selected from one or more of halogen flame retardant, phosphorus flame retardant, nitrogen flame retardant, boron flame retardant, antimony flame retardant, inorganic metal compound flame retardant and expanded graphite flame retardant. Even under the environment that does not supply water, the fire retardant also can prevent that the compound hydrophilic drainage heat sink of hot melt from burning out.

The stabilizer is selected from one or more of light stabilizer, antioxidant and heat stabilizer.

The colorant may reduce the light transmittance and/or change the proportion of light in each wavelength band that enters the greenhouse. In one example, the colorant is selected from the group consisting of carbon black, lithopone, iron oxide red, iron oxide yellow, iron oxide black, iron oxide blue, oil black, scarlet, fast yellow, phthalocyanine blue, ultramarine, chrome yellow, and chrome green.

The infrared reflecting material reflects infrared light, and the light transmittance of the hot-melt composite hydrophilic drainage cooling device is reduced. In one example, the infrared light reflecting material is selected from aluminum powder, rutile titanium dioxide, ITO, NaZnPO₄Or hollow glass microspheres.

Photoluminescent materials selectively absorb light in certain wavelength bands, gain energy, and emit light in other wavelength bands. In one example, the photoluminescent material is selected from CaS Eu²⁺Europium benzoate, europium maleate complex-styrene copolymer and manganese-doped zinc silicateOne or more of the above.

The reversible thermochromic material changes color when the temperature exceeds the color change temperature and recovers the color when the temperature is lower than the color restoration temperature, so that the light transmittance is reduced. In one example, the reversible thermochromic material is selected from the group consisting of a combination of one or more of a hexamethylene tetramine cobalt (ii) complex, a crystal violet lactone reversible thermochromic system, and a cresol red reversible thermochromic system.

In one example, the hydrophilic surface layer includes a hydrophilic powder and a first polymer resin, and the addition of the hydrophilic powder cooperates with the hydrophilicity of the first polymer resin to jointly make a first contact angle θ of the hydrophilic surface layer with water₁< 60 degrees. Further, a third contact angle θ of the hydrophilic powder with water₃＜50°。

In some of these examples, the hydrophilic powder forms a chemical bond with at least one component (e.g., the first polymeric resin) contained in the hydrophilic surface layer. In this way, the hydrophilic powder is firmly attached in the hydrophilic surface layer.

In some examples, the hydrophilic powder is a combination of one or more of mica, diatomaceous earth, kaolin, hydrophilic white carbon, hydrophilic silica sol condensate, talc, montmorillonite powder, bentonite, wollastonite powder, zeolite powder, and molecular sieve powder.

The invention also provides application of the hot-melt composite hydrophilic drainage cooling device in cooling of a greenhouse.

In another aspect of the invention, a greenhouse cooling system is provided, which comprises a greenhouse body, a water supply device, and the hot-melt composite hydrophilic drainage cooling device; the hot-melt composite hydrophilic drainage cooling device is installed on the greenhouse body, and water flows out of the water supply device and flows through the hot-melt composite hydrophilic drainage cooling device.

Referring to fig. 5 to 8, fig. 5 shows a schematic view of a hot-melt composite hydrophilic drainage cooling device 30 according to an example of the present invention installed in a greenhouse 100, fig. 6 shows a schematic view of a structure of two hot-melt composite hydrophilic drainage cooling devices 30 formed by cutting a hot-melt composite hydrophilic sheet according to an example of the present invention, and fig. 7 shows a schematic view of the present inventionFig. 8 shows a schematic structural view of a hot-melt composite hydrophilic drainage cooling device 30 and a film pressing rope 50 according to another example of the present invention. According to the hot-melt composite hydrophilic drainage cooling device 30 provided by one example of the invention, the hot-melt composite hydrophilic drainage cooling device 30 comprises a plurality of drainage wires 31 and connecting wires 32 connected with the drainage wires 31. The drainage wire 31 and the connecting wire 32 are arranged in a crossed mode, the drainage wire 31 comprises a hydrophilic surface layer 311 and a base layer 312, the hydrophilic surface layer 311 and the base layer 312 are formed by hot melting and compounding, the hydrophilic surface layer 311 is provided with a first hydrophilic outer surface, and the hydrophilic degree of the first hydrophilic outer surface reaches a first contact angle theta with water₁< 60 deg. The hydrophilicity of the drainage wire 31 destroys the surface tension of water. In one example, one end of the drainage wire 31 is in contact with the greenhouse 100. In one example, one end of the drainage wire 31 is in contact with the covering 20 of the greenhouse 100, and specifically, one end of the drainage wire 31 is disposed on the surface of the covering 20 of the greenhouse 100; preferably, one end of the drainage wire 31 is arranged on the outer surface of the cover 20 above the upper edge 211 of the side air outlet of the greenhouse 100. The other end of the drainage wire 31 is used to extend to a predetermined area on the ground at the side of the frame 10 of the greenhouse 100. Specifically, the predetermined area is, for example, the water collecting device 40, the river, or the like, and the cover 20 is, for example, a shed film, glass, a solar panel, or the like, and is not limited thereto.

The hot-melt composite hydrophilic drainage cooling device 30 can be covered from any height on the covering 20. When the hot-melt composite hydrophilic drainage cooling device 30 is installed on the covering 20 of the greenhouse 100, one end of the drainage wire 31 is in contact with the surface of the covering 20, and the other end of the drainage wire 31 extends to the water collecting device 40 on the ground beside the canopy frame 10. In the process of dispersing water onto the surface of the covering 20 or dispersing water onto the hot-melt composite hydrophilic drainage cooling device 30 covered on the surface of the covering 20 for cooling, the water flows downwards along the covering 20, the water on the surface of the covering 20 is drained through the plurality of drainage wires 31, or the water directly dispersed onto the hot-melt composite hydrophilic drainage cooling device 30 is drained through the plurality of hydrophilic drainage wires 31. On one hand, the drainage wires 31 can drain water into the water collecting devices 40 on the side edges of the shed frame 10, so that the water is prevented from flowing to the ground along the covering 20 and/or the film pressing ropes 50, and the shed frame 10 is prevented from being damaged and corroded by waterlogging; and can realize water circulation; on the other hand, water can be diffused and spread into a thin water film to evaporate and reduce the temperature of the water, the water is indirectly subjected to heat exchange with hot air in the greenhouse through the covering 20 and is directly subjected to heat exchange with hot air entering the greenhouse near the air release opening 21 on the side edge of the greenhouse to reduce the temperature, so that the temperature in the greenhouse is obviously reduced; in addition, after the cooled air entering the greenhouse is convected into the greenhouse, the relative humidity is naturally reduced in the heating process in the greenhouse, so that high humidity in the greenhouse is avoided.

It should be noted that the cross arrangement means that the drainage wires 31 and the connecting wires 32 cross each other when the thermal melting composite hydrophilic drainage cooling device 30 is unfolded or installed on the covering 20. The crossing angle of the drainage wire 31 and the connecting wire 32 is not limited, and may be, for example, 90 ° or other angles.

Specifically, the drainage wire 31 is fixedly connected to the connecting wire 32. Alternatively, the drainage wire 31 and the connecting wire 32 are fixedly connected at the crossing portion by means of adhesion, hot melt lamination, stitching, riveting or integral molding.

It should be noted that the connecting wire 32 is mainly used to connect a plurality of drainage wires 31 together, that is, the connecting position of the connecting wire 32 on the drainage wire 31 is not limited, and may be any position on the drainage wire 31.

Referring to fig. 6, 7 and 8, as an example, the connecting wire 32 is connected to one end of the drainage wire 31, i.e. the expanded shape of the thermal melting composite hydrophilic drainage temperature-reducing device 30 is comb-shaped. Wherein, one end of the drainage wire 31 refers to the end of the drainage wire 31 farthest from the ground after the hot-melt composite hydrophilic drainage cooling device 30 is installed on the covering 20, and the other end of the drainage wire 31 refers to the end closest to the ground.

Referring to fig. 7, it can be understood that, in the process of fixedly connecting the connecting wire 32 and the drainage wire 31 together, in order to ensure that the connecting wire 32 and the drainage wire 31 are stably connected, as an example, the connecting wire 32 is crosswise arranged at a certain position of the drainage wire 31, and then the end of the drainage wire 31 is reversely folded, so that the drainage wire 31 is distributed at two sides of the connecting wire 32, that is, at least two positions of the drainage wire 31 and the connecting wire 32 are in contact with each other, and the at least two positions are bonded, fused, stitched or riveted together, so that the fixed connection between the drainage wire 31 and the connecting wire 32 is more stable.

It should be noted that the certain part can be any position on the drainage wire 31, for example, the middle position of the drainage wire 31, so that the drainage wire 31 is folded in half and then fixedly connected with the connecting wire 32, and the double-layered hot-melt composite hydrophilic drainage cooling device 30 is formed, and has a better drainage cooling effect; of course, other positions of the drainage wire 31 are also possible, and are not limited herein, and may be set according to actual requirements.

Referring to fig. 6 and 7, as an example, during installation, the connecting wires 32 are laid between the covering 20 and the film pressing rope 50, two adjacent drainage wires 31 straddle the two sides of the film pressing rope 50 and extend to the preset area on the ground at the side of the greenhouse 100, and only one pull-down rib 34 is needed to be installed at the other end of the drainage wire 31, so that the hot-melt composite hydrophilic drainage cooling device 30 can be installed between the greenhouse 100 and the preset area without shearing and damaging the physical structure of the hot-melt composite hydrophilic drainage cooling device 30. The connection mode of the other end of the drainage wire 31 and the lower pull rib 34 comprises the following steps: binding; or the other end of the drainage wire 31 is provided with a through hole, and the lower pull rib 34 is inserted through the through hole; or the other end of the drainage wire 31 is reversely folded around the lower lacing wire 34 and is adhered to the drainage wire 31 at the position beside the lower lacing wire 34.

In one example, the number of the connecting filaments 32 is not limited to one, and may also be two, three, four or more, adjacent two drainage filaments 31 and two adjacent connecting filaments 32 intersecting with the drainage filaments define pores (not shown in the figure) therebetween, the pores are permeable to high temperature air, and the first hydrophilic outer surface of the hydrophilic surface layer 311 of the drainage filament 31 forms a water film to better reduce the temperature of the high temperature air.

Referring to fig. 8 and 9, in one example, the connecting wire 32 includes a first connecting wire 321 disposed at one end of the drain wire 31 and a second connecting wire 322 disposed at the other end of the drain wire 31. The adjacent two drainage wires 31 and the first connecting wire 321 and the second connecting wire 322 enclose an aperture. The lower tie bar 34 is inserted into the aperture.

Referring to fig. 8 and 9, further, the first connecting wire 321 is used for being laid between the covering 20 of the greenhouse 100 and the film pressing rope 50; the second connecting wire 322 is provided with a plurality of first cut-outs 3221, the plurality of first cut-outs 3221 are used for corresponding to the film pressing ropes 50 of the greenhouse 100 one by one, and the drainage wires 31 at two sides of the first cut-outs 3221 are used for locating two sides of the film pressing ropes 50.

Referring to fig. 8 and 9, in a specific use, according to the position of each film pressing rope 50, the second connecting wires 322 are sequentially cut at corresponding positions aligned with the film pressing ropes 50 to form a plurality of first cut 3221; and laying the first connecting wire 321 between the covering 20 and the film pressing rope 50, pulling each drainage wire 31 out of the side edge of the shed 10, and straddling the drainage wires 31 on both sides of the first cut 3221 on both sides of the corresponding film pressing rope 50. And then the lower lacing wires 34 are inserted into the lower edges of the holes defined by the fixed connection of the second connecting wires 322 and the drainage wires 31, so that the hot-melt composite hydrophilic drainage cooling device 30 can be stretched and straightened through the lower lacing wires 34, and water flows along the drainage wires 31. Thus, the second connecting wire 322 connected to the other end of the drainage wire 31 can prevent each drainage wire 31 from being tangled and knotted; and the lower pull ribs 34 do not need to be threaded around each drainage wire 31, and only need to be threaded in a plurality of holes between two adjacent first shearing mouths 3221 for a few times, so that the laying and installation labor amount is remarkably reduced, and the laying and installation efficiency is remarkably improved. In addition, at the overlapping position of the hot-melt composite hydrophilic drainage cooling device 30 and the film pressing rope 50, the connecting wires 32 extending out of the film pressing rope 50 are sequentially cut off, so that the lower part of the hot-melt composite hydrophilic drainage cooling device 30 can be pulled out of the greenhouse and extended to the water collecting device 40. Because the connecting wire 32 is fixedly connected with the drainage wire 31, the first cut 3221 is not disconnected, thereby substantially avoiding influencing the longitudinal tensile strength of the hot-melt composite hydrophilic drainage temperature-reducing device 30.

In addition, because the connecting wires 32 are fixedly connected with the drainage wires 31, the required length of the hot-melt composite hydrophilic drainage cooling device 30 can be arbitrarily cut according to the length of the greenhouse 100, so that the standard production of uniform specification is facilitated.

Referring to fig. 8, a third connecting wire 323 is further disposed between the first connecting wire 321 and the second connecting wire 322. As in the above embodiment, the first connecting wire 321 may be disposed between the film pressing rope 50 and the covering 20, and the second connecting wire 322 and the third connecting wire 323 may be cut to extend out of the side of the canopy frame 10 to be laid in a single layer; or the third connecting wire 323 is arranged between the film pressing rope 50 and the covering 20, the first connecting wire 321 and the second connecting wire 322 are cut off and hang down to extend out of the side edge of the shed frame 10, and the double-layer laying is carried out.

Referring to fig. 8, the specific structural form of the drainage wire 31 is set according to actual requirements, and is not limited herein. As an example, the drainage wire 31 is a single wire or two wires, etc., and for example, the drainage wire 31 is formed by connecting a plurality of drainage wire segments in series. In one example, different drainage wire segments may be disposed above and below the third connecting wire 323, with interfaces between the drainage wire segments being located on the third connecting wire 323, which may overlap, level, stagger, or form a break; the water falls from the section of the drainage wire above the third connecting wire 323, through the third connecting wire 323, and onto the section of the drainage wire below the third connecting wire 323. In one example, a plurality of the fluidic wire segments may also be connected in parallel or in series.

As an example, a plurality of hot-melt composite hydrophilic drainage cooling devices 30 can be applied to the same greenhouse 100 in series, parallel or series-parallel. Namely: the plurality of hot-melt composite hydrophilic drainage cooling devices 30 can be spliced and used in parallel on the same greenhouse 100; or, as shown in fig. 10, a plurality of hot-melt composite hydrophilic drainage cooling devices 30 may also be stacked on the covering 20, and two adjacent stacked hot-melt composite hydrophilic drainage cooling devices 30 are provided with a layer gap, and can be used for drainage of water with a large flow rate, evaporation and heat exchange cooling layer by layer, and the hot air entering the greenhouse is cooled step by step between layers.

In one example, the connecting filaments 32 cross the down-flow filaments 31 in different molecular orientations, e.g., perpendicular orientations, after drawing, thereby increasing the composite strength after the attachment.

In one example, the connecting filament 32 is a hydrophilic filament body, and specifically, the connecting filament 32 is provided with a second hydrophilic outer surface having a hydrophilicity degree reaching a fourth contact angle θ with water₄< 60 deg. In this way, the connecting wires can also spread and spread water into a thin water film, and the water on one drainage wire flows onto the adjacent drainage wires through the connecting wires, so that the water is distributed and balanced between the adjacent drainage wires. Of course, the connecting filament 32 may also be a hydrophobic filament, which is not limited herein and may be selected according to the actual situation.

In one example, the connecting wires 32 comprise a connecting wire hydrophilic surface layer and a connecting wire base layer, wherein the connecting wire hydrophilic surface layer and the connecting wire base layer are compounded through hot melting; the second hydrophilic outer surface is specifically positioned on the hydrophilic surface layer of the connecting wire, and the hydrophilicity degree of the second hydrophilic outer surface reaches a fourth contact angle theta with water₄＜60°。

In one example, the hydrophilic surface layer of the connecting wire comprises a fourth high molecular resin, the connecting wire base layer comprises a fifth high molecular resin, the fourth high molecular resin comprises a fourth high molecular chain segment, and the fifth high molecular resin comprises a fifth high molecular chain segment; the fourth high molecular chain segment and the fifth high molecular chain segment can form crystals; and after the hydrophilic surface layer of the connecting wire and the base layer of the connecting wire are compounded through hot melting, crystals are formed at the interface by the fourth high molecular chain segment and the fifth high molecular chain segment.

In one example, the fourth polymer segment is selected from the group consisting of a polyethylene segment, a polypropylene segment, a polyester segment, and a polyamide segment, in the same category as the fifth polymer segment.

In one example, after the connecting wire hydrophilic surface layer and the connecting wire base layer are compounded through hot melting, chemical bonds are formed at the interface.

In one example, the surface of the tie filament base layer distal to the hydrophilic surface layer of tie filaments is provided with a tie filament base layer.

In another example, the thermal melting composite hydrophilic drainage cooling device 30 comprises a plurality of drainage wires 31 which are woven, and pores are defined between adjacent drainage wires 31. Specifically, the weaving manner is knitting, tatting, or the like; the knitting process is preferably self-locking knitting. Thus, the hot-melt composite hydrophilic drainage cooling device 30 is prevented from filament shedding, or the hot-melt composite hydrophilic drainage cooling device 30 can only carry out limited filament shedding.

Referring to fig. 6, in another example, the hot-melt composite hydrophilic drainage cooling device 30 is formed by cutting a hot-melt composite hydrophilic sheet into the drainage wire 31 and the connecting wire 32, i.e., the drainage wire 31 and the connecting wire 32 do not need to be connected by hot-melt composite, bonding, sewing or riveting, and also do not need to be connected by weaving.

In one example, the connecting wire 32 and the drainage wire 31 are integrally formed from the same material.

The cutting method is not limited to the above, and may be selected according to actual circumstances, and is not limited to the above. In addition, how the stretching process is specifically selected may also be actually selected, and is not limited herein.

Referring to fig. 5 and 10, in an example, a greenhouse 100 includes a frame 10 and a covering 20, and the covering 20 is mounted on the frame 10. The greenhouse 100 further comprises the hot-melt composite hydrophilic drainage cooling device 30 of any one of the above examples, one end of the drainage wire 31 is in contact with the covering 20, and the other end of the drainage wire 31 extends to a preset area on the ground on the side of the greenhouse 100. Alternatively, the preset area is, for example, the water collecting device 40, the river, etc., and is not limited.

The greenhouse 100 can be covered with the hot-melt composite hydrophilic drainage cooling device 30 at any height on the covering 20. When the hot-melt composite hydrophilic drainage cooling device 30 is installed on the covering 20 of the greenhouse 100, one end of the drainage wire 31 is in contact with the surface of the covering 20, and the other end of the drainage wire 31 extends to the water collecting device 40 on the ground beside the canopy frame 10. In the process of scattering water on the surface of the covering 20 or scattering water on the hot-melt composite hydrophilic drainage cooling device 30 covered on the surface of the covering 20 for cooling, the water flows downwards along the covering 20, the water on the surface of the covering 20 is drained through the plurality of drainage wires 31, or the water directly scattered on the hot-melt composite hydrophilic drainage cooling device 30 is drained through the plurality of hydrophilic drainage wires 31. On one hand, the drainage wires 31 can drain water into the water collecting devices 40 on the side edges of the shed frame 10, so that the water is prevented from flowing to the ground along the covering 20 to form waterlogging and corrosion on the shed frame 10; and can realize water circulation; on the other hand, water can be diffused and spread into a thin water film to evaporate and reduce the temperature of the water, the water is indirectly subjected to heat exchange with hot air in the greenhouse through the covering 20 and is directly subjected to heat exchange with hot air entering the greenhouse near the air release opening 21 on the side edge of the greenhouse to reduce the temperature, so that the temperature in the greenhouse is obviously reduced; in addition, after the cooled air entering the greenhouse is convected into the greenhouse, the relative humidity is naturally reduced in the heating process in the greenhouse, so that high humidity in the greenhouse is avoided.

Referring to fig. 5, the water supply device comprises a water distribution device 91, and the water distribution device 91 is used for distributing water on the covering 20 or directly on the hot-melt composite hydrophilic drainage cooling device 30. The water distribution device 91 comprises a cavity wall, and a water inlet of the water distribution device and a plurality of water outlet micropores which are arranged on the cavity wall, wherein the cavity wall is enclosed into a cavity, the water inlet of the water distribution device is communicated with the cavity, and the cavity is communicated with the water outlet micropores. The water distribution device 91 has a water outlet mode including spraying, flowing or dripping. Alternatively, the water distribution device 91 comprises one or more combinations of micro-spray belts, water spray pipes, drip irrigation belts, capillary-drip swords, or capillary-spray heads.

In one example, the water supply device further comprises a water pump 92, and a water conveying pipeline 93 is arranged between the water pump 92 and the water distribution device 91. The water in the water storage device 95 flows out from the water distribution device 91 through the water pipe 93 from the water pump 92, is dispersed on the covering 20, then falls on the hot-melt composite hydrophilic drainage cooling device 30, flows into the water collection device 40 along the hot-melt composite hydrophilic drainage cooling device 30, and flows back to the water storage device 95 through the filtering device 96, so that water circulation is realized.

Hereinafter, specific examples will be described, and the raw materials used in the examples are all commercially available products unless otherwise specified.

Example 1

The hot-melt composite hydrophilic drainage cooling device comprises aThe drainage device comprises rows of drainage wires which are arranged in parallel and aligned in equal length, first connecting wires which are arranged at the upper ends of the drainage wires in a vertical crossing mode in sequence and are fixedly connected with the drainage wires through adhesives, and second connecting wires which are arranged at the lower ends of the drainage wires in a vertical crossing mode in sequence and are fixedly connected with the drainage wires through adhesives. The connecting wire is of a double-layer co-extrusion composite structure and is divided into a connecting wire X layer and a connecting wire Y layer, wherein the connecting wire X layer is composed of 60 parts of HDPE, 0.1 part of light stabilizer UV-327 and 0.05 part of antioxidant 1076; the Y layer component of the connecting wire is 40 parts of hot melt adhesive. Each drainage wire comprises a base layer, wherein the two side surfaces of the base layer are respectively provided with an a-th hydrophilic surface layer and a b-th hydrophilic surface layer which have the same components; the drainage wire is formed by co-extruding and compounding an a hydrophilic surface layer, a base layer and a b hydrophilic surface layer to form a three-ply board structure; the components of the hydrophilic surface layer a are 19 parts of sodium acrylate grafted LDPE, 0.5 part of bactericidal algicide superfine copper powder and 0.1 part of repellent capsaicin; the base layer comprises 50 parts of HDPE, 5 parts of magnetic powder, 5 parts of decabromodiphenylethane, 1 part of carbon black, 0.5 part of rutile type titanium dioxide, 0.1 part of light stabilizer UV-327, 0.05 part of antioxidant 1076 and 0.5 part of slipping agent oleamide; the sodium acrylate grafted polyethylene of the hydrophilic surface layer and the polyethylene of the base layer form crystals at an interface through respective polyethylene chain segments; similarly, on the other side of the base layer, the sodium acrylate grafted polyethylene of the hydrophilic surface layer b forms crystals with the polyethylene of the base layer at the interface; so that the first hydrophilic surface layer and the second hydrophilic surface layer are firmly pulled by the base layer; measuring the first contact angle theta₁Is 41 degrees.

The preparation method of the hot-melt composite hydrophilic drainage cooling device comprises the following steps:

(1) sequentially and respectively co-extruding the raw materials of the hydrophilic surface layer a, the base layer and the hydrophilic surface layer b layer by layer from three extruders with the same composite die head to prepare a hot-melt composite hydrophilic sheet;

(2) cutting the hot-melt composite hydrophilic sheet into strips with the width of 0.5cm, and stretching to obtain the drainage wire;

(3) respectively co-extruding the connecting wire X layer component and the connecting wire Y layer component from two extruders with the same composite die head to prepare a second sheet material;

(4) cutting the second sheet into strips with the width of 1cm, and stretching to obtain connecting wires;

(5) cutting a plurality of drainage wires with equal length, aligning and laying in parallel;

(6) 2 connecting wires are cut, and the two connecting wires are vertically clamped on two side surfaces of one end of each drainage wire; the Y layer (hot melt adhesive layer) of the connecting wire faces the drainage wire, and the X layer of the connecting wire is far away from the drainage wire; thus, the two connecting wires and the drainage wires between the two connecting wires form a sandwich biscuit structure. The sandwich biscuit structure is hot-pressed and compounded.

And obtaining the comb-shaped hot-melting composite hydrophilic drainage cooling device.

Example 2

(1) Manufacturing a drainage wire: a drainage wire was prepared as in example 1;

(2) manufacturing a connecting wire: sequentially and respectively co-extruding three groups of raw materials, namely a connecting wire substrate layer (the component of which is hot melt adhesive), a connecting wire substrate layer (the component of which is HDPE) and a connecting wire hydrophilic surface layer (the component of which is the same as that of the hydrophilic surface layer a in the embodiment 1), of the connecting wire layer by layer from three extruders with the same composite die head, cutting the raw materials into strips of 2cm, and stretching the strips to obtain the connecting wire with one hydrophilic side surface and the other hot melt adhesive layer on the other side surface;

(3) cutting a plurality of drainage wires with equal length, aligning and laying in parallel;

(4) according to the fixing and connecting method of the embodiment 1, two first connecting wires are vertically clamped and fixedly connected to two side surfaces of one end of each drainage wire.

(5) And in the same way, the two second connecting wires are vertically clamped and fixedly connected to two side surfaces of the other end of each drainage wire.

And obtaining the hot-melt composite hydrophilic drainage cooling device.

Example 3

The drainage wire prepared in the example 2 and the connecting wire are woven into a hot-melt composite hydrophilic drainage cooling device by a weaving machine, wherein the drainage wire is used as a weft wire, and the connecting wire is used as a warp wire.

Example 4

And (3) carrying out post-treatment on the hot-melt composite hydrophilic drainage cooling device prepared in the embodiment 3 through a hot pressing process, so that the drainage wire is fixedly connected with the connecting wire.

Example 5

The hot-melt composite hydrophilic sheet prepared in the example 1 is sheared to prepare two strip-shaped complementary comb-shaped hot-melt composite hydrophilic drainage cooling devices.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a compound hydrophilic drainage heat sink of hot melt which characterized in that includes:

2. The hot-melt composite hydrophilic drainage cooling device according to claim 1, wherein the hot-melt composite manner comprises co-extrusion and/or hot-press composite.

3. The hot-melt composite hydrophilic drainage cooling device according to claim 1, wherein the material of the hydrophilic surface layer comprises a first polymer resin; the material of the base layer includes a second polymer resin.

4. The hot-melt composite hydrophilic drainage cooling device according to claim 3, wherein the first polymer resin contains a first polymer chain segment, and the second polymer resin contains a second polymer chain segment; the first polymer segment and the second polymer segment can form crystals; and the hydrophilic surface layer and the base layer are subjected to hot melting compounding and then form crystals at an interface by the first polymer chain segment and the second polymer chain segment.

5. The hot-melt composite hydrophilic drainage temperature reducing device according to claim 4, wherein the first polymer segment and the second polymer segment are selected from a polyethylene segment, a polypropylene segment, a polyester segment or a polyamide segment, which are of the same kind.

6. The hot-melt composite hydrophilic drainage cooling device according to claim 5, wherein the first polymer chain segment and the second polymer chain segment both belong to polyethylene chain segments, the first polymer resin is selected from hydrophilic modified polyethylene and/or hydrophilic modified ethylene-non-olefin unsaturated monomer copolymer, and the second polymer resin is selected from one or more of polyethylene, ethylene-non-olefin unsaturated monomer copolymer, graft modified polyethylene and graft modified ethylene-non-olefin unsaturated monomer copolymer;

7. The hot-melt composite hydrophilic drainage cooling device according to claim 1, wherein the hydrophilic surface layer and the base layer are subjected to hot-melt composite and then form chemical bond connection at the interface.

8. The hot-melt composite hydrophilic drainage cooling device according to claim 7, wherein the chemical bond connection is selected from one or more of the group consisting of chemical bond connection of epoxy group and acid anhydride, chemical bond connection of epoxy group and amino group, chemical bond connection of isocyanate group and active hydrogen-containing molecule, chemical bond connection of hydroxyl group and carboxyl group, chemical bond connection of amino group and carboxyl group, chemical bond connection of silicon hydroxyl group and silicon hydroxyl group, chemical bond connection of unsaturated group and unsaturated group, chemical bond connection of unsaturated group grafted on molecular chain, and chemical bond connection formed by aldol condensation.

9. The hot-melt composite hydrophilic drainage cooling device according to claim 1, wherein a substrate layer is provided on the surface of the substrate layer away from the hydrophilic surface layer.

10. The hot-melt composite hydrophilic drainage cooling device according to claim 9, wherein the substrate layer comprises a third auxiliary agent; the third auxiliary agent is selected from one or more of a sterilization algicide, a repellent, magnetic powder, a flame retardant, a stabilizer, a coloring agent, an infrared light reflecting material, a photoluminescence material and a reversible thermochromism material.

11. The hot-melt composite hydrophilic drainage cooling device according to claim 1, wherein the hydrophilic surface layer contains a first auxiliary agent; the first auxiliary agent is selected from one or more of a sterilization algicide, a repellent, magnetic powder, a flame retardant, a stabilizer, a coloring agent, an infrared light reflecting material, a photoluminescence material, a reversible thermochromism material and hydrophilic powder; and/or the presence of a catalyst in the reaction mixture,

12. The hot-melt composite hydrophilic drainage cooling device according to any one of claims 1 to 11, wherein one end of the drainage wire is used for contacting with a greenhouse, and the other end of the drainage wire is used for extending to a preset area on the ground at the side of the greenhouse.

13. The hot-melt composite hydrophilic drainage cooling device according to any one of claims 1 to 11, wherein the connecting wires are fixedly connected with the crossing parts of the plurality of drainage wires; or the hot-melt composite hydrophilic drainage cooling device is formed by weaving a plurality of drainage wires; or the hot-melt composite hydrophilic drainage cooling device is formed by shearing the hot-melt composite hydrophilic sheet into the drainage wire and the connecting wire.

14. The hot-melt composite hydrophilic drainage cooling device according to any one of claims 1 to 11, wherein the connecting wires comprise a first connecting wire arranged at one end of the drainage wire and a second connecting wire arranged at the other end of the drainage wire; and the adjacent two drainage wires, the first connecting wire and the second connecting wire form a pore.

15. The application of the hot-melt composite hydrophilic drainage cooling device of any one of claims 1 to 14 in cooling of greenhouses.

16. A greenhouse cooling system is characterized by comprising a greenhouse body, a water supply device and the hot-melt composite hydrophilic drainage cooling device as claimed in any one of claims 1 to 14;