CN212035156U - Breathable and heat-absorbing liquid rubber-based mulching film - Google Patents
Breathable and heat-absorbing liquid rubber-based mulching film Download PDFInfo
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- CN212035156U CN212035156U CN202020204604.9U CN202020204604U CN212035156U CN 212035156 U CN212035156 U CN 212035156U CN 202020204604 U CN202020204604 U CN 202020204604U CN 212035156 U CN212035156 U CN 212035156U
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- film
- heat
- air
- natural rubber
- humic acid
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- 239000007788 liquid Substances 0.000 title claims abstract description 71
- 229920001971 elastomer Polymers 0.000 title claims abstract description 23
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 51
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 51
- 229920001194 natural rubber Polymers 0.000 claims abstract description 51
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000004021 humic acid Substances 0.000 claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 34
- 229920002554 vinyl polymer Polymers 0.000 claims abstract description 15
- 150000001875 compounds Chemical class 0.000 claims abstract description 13
- 239000011148 porous material Substances 0.000 claims abstract description 11
- 239000002131 composite material Substances 0.000 claims description 33
- 238000007605 air drying Methods 0.000 claims description 31
- 239000004698 Polyethylene Substances 0.000 claims description 27
- -1 polyethylene Polymers 0.000 claims description 27
- 229920000573 polyethylene Polymers 0.000 claims description 27
- 238000009826 distribution Methods 0.000 claims description 6
- 239000002362 mulch Substances 0.000 claims 2
- 239000002985 plastic film Substances 0.000 abstract description 15
- 229920006255 plastic film Polymers 0.000 abstract description 15
- 239000012528 membrane Substances 0.000 abstract description 4
- 230000035699 permeability Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 24
- 238000010521 absorption reaction Methods 0.000 description 15
- 239000007789 gas Substances 0.000 description 5
- 125000000524 functional group Chemical group 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 229920002521 macromolecule Polymers 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000012271 agricultural production Methods 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 125000002723 alicyclic group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- GRVDJDISBSALJP-UHFFFAOYSA-N methyloxidanyl Chemical group [O]C GRVDJDISBSALJP-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 125000004151 quinonyl group Chemical group 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Abstract
The utility model relates to a ventilative endothermic liquid rubber base plastic film, air-dry heat-absorbing membrane (1) including the compound humic acid of one deck liquid natural rubber, the compound humic acid of liquid natural rubber air-dries spherical negative heat material (11) of embedding in the heat-absorbing membrane, and the compound humic acid of one deck liquid natural rubber air-dries upper and lower surface of heat-absorbing membrane respectively compound one deck polyvinyl film (2), and polyvinyl film evenly distributed is ventilative micropore (21). The pores of the mulching film become larger along with the rise of the temperature, the air permeability of the mulching film in the daytime is enhanced, the pores of the mulching film become smaller or closed along with the fall of the temperature at night, and cold air at night is prevented from entering a space covered by the mulching film. The utility model discloses plastic film simple structure, convenient to use is applicable to and develops crops cultivation in the great cold area of difference in temperature round the clock winter.
Description
The technical field is as follows:
the utility model relates to a plastic film technical field especially relates to a ventilative endothermic liquid rubber base plastic film.
Background art:
mulching film on farmland in winter is a main method for agricultural production in cold winter in northern areas of China at present. In the northern area of China, the temperature in the daytime is usually lower than minus 10 ℃, the temperature at night can even be reduced to more than minus 20 to 30 ℃, and if measures are not taken, a frozen soil layer can be formed on the surface layer of soil, which is quite unfavorable for agricultural production. Under the cold condition, the mulching film can keep the surface temperature of the soil and protect crops from being frostbitten by cold air in winter. In practical use of mulching film technology, fresh air is needed for normal growth of crops, and seedlings of the crops die if fresh air is not available, so that in practical production, farmers can ventilate the crops by pricking holes in the traditional mulching film. Holes punched in the traditional mulching film are reserved all the time, and the reserved holes and the heat preservation effect of the mulching film form contradictions, namely when sunlight irradiates in the daytime, the surface temperature of the mulching film and the air temperature in the environment are correspondingly higher, and the temperature of the space covered by the mulching film is not greatly influenced by the external air exchanged through the holes in the mulching film; however, at night in winter without sunlight, the temperature of the external environment is very low, cold air outside the mulching film can enter the space covered by the mulching film through the open pores on the mulching film, the cold air can reduce the temperature of soil, can damage the growth of crops covered by the mulching film, and greatly weakens the heat preservation effect of the mulching film on the crops.
The utility model has the following contents:
the utility model discloses a solve technical problem and provide a simple structure's liquid rubber base plastic film, but the high-efficient heat absorption, plastic film surface hole size can change along with ambient temperature's change, also corresponding automatically regulated plastic film gas permeability.
The utility model provides a technical scheme that technical problem adopted is: a breathable and heat-absorbing liquid rubber-based mulching film comprises a layer of liquid natural rubber composite humic acid air-drying heat-absorbing film (1), and is characterized in that spherical negative heat materials (11) are embedded in the liquid natural rubber composite humic acid air-drying heat-absorbing film, a layer of polyvinyl film (2) is respectively compounded on the upper surface and the lower surface of the layer of liquid natural rubber composite humic acid air-drying heat-absorbing film, and breathable micropores (21) are uniformly distributed in the polyvinyl film.
The thickness of the liquid natural rubber composite humic acid air-drying heat absorption film (1) is 0.1-1.5 cm.
The spherical negative thermal material (11) is made of ZrW2O8And (3) preparing the compound.
The diameter of the spherical negative heat material (11) is 0.1-1.5 cm, and the distribution number density of the spherical negative heat material is 5-50 pieces/m2。
The thickness of the polyethylene base film (2) is 0.05-0.3 cm.
The polyethylene film is uniformly distributed with air-permeable micropores (21) with the aperture of 0.02-0.5 cm.
The polyethylene film is uniformly distributed with air-permeable micropores (21) and the distance between adjacent micropores is 2-15 cm.
By adopting the technical scheme, the breathable heat-absorbing liquid rubber-based mulching film is formed by air-drying the heat-absorbing film by adopting liquid natural rubber composite humic acid, the liquid natural rubber is formed by oxidizing and cracking natural rubber into 1-2 ten thousand rubber chain segments with smaller molecular weight, the liquid natural rubber is viscous and flowable viscous fluid, and compared with solid high-molecular natural rubber, the viscous fluid is high in processability, so that the liquid natural rubber can be coated on a base material to form a functional film layer easily by utilizing the viscosity of the liquid natural rubber. The chain segment of the liquid natural rubber is still mainly polyisoprene, so that the non-polarity of the liquid natural rubber is stronger, and the high molecular chain segment of the liquid natural rubber is also connected with some oxygen-containing functional groups, such as hydroxyl, carboxyl and the like. Humic acid is a macromolecular organic substance widely existing in nature, the basic structure of the humic acid macromolecule is an aromatic ring and an alicyclic ring, the non-polarity is strong, so the humic acid and liquid natural rubber which is non-polar can be compatible with each other, the humic acid and the liquid natural rubber can be uniformly compounded together, in addition, the aromatic ring of the humic acid is connected with functional groups such as carboxyl, hydroxyl, carbonyl, quinonyl, methoxyl and the like, the functional groups of the tubes can generate chemical reaction with the functional groups such as the hydroxyl, the carboxyl and the like on the liquid natural rubber in the air drying process, and the liquid natural rubber and the humic acid macromolecule chain segment are crosslinked to form a composite macromolecule film layer. The humic acid is generally black and the like, and the dark colors can enable the liquid natural rubber composite humic acid air-drying layer to have high-efficiency heat absorptivity to sunlight, so that the liquid natural rubber composite humic acid air-drying layer becomes a heat absorption function film layer which can efficiently absorb sunlight energy, and heat absorbed by the heat absorption function film layer is released in a space covered by the mulching film, so that the damage of cold air in winter to crops can be effectively resisted.
The utility model provides a can breathe freely endothermic liquid rubber base plastic film adopts polyethylene film (2) air-dry the upper and lower surface of heat-absorbing film at liquid natural rubber compound humic acid, and polyethylene film is the substrate layer of liquid natural rubber compound humic acid air-dry layer, can conveniently coat liquid natural rubber and humic acid complex on polyethylene film, air-dries in-process liquid rubber, further takes place the cross-linking reaction between the polymer chain of humic acid, forms the air-dry layer. Micropores distributed on the polyethylene film provide a channel for gas molecule exchange between the space gas covered by the mulching film and the gas outside the mulching film.
ZrW is embedded in the liquid natural rubber composite humic acid air-drying heat absorption film2O8The spherical negative thermal material (11) is prepared from ZrW, and is a material with volume contraction when heated and volume expansion when encountering cold2O8The negative thermal behavior of the compound can be triggered at normal temperature or even at lower temperatures. This ZrW is present at high daytime temperatures2O8Spherical negative heating materialThe volume of the material can shrink, so that the negative heat material and the liquid natural rubber composite humic acid air-dry heat absorption film can be separated from a polymer matrix to a certain extent, and pores are formed on the air-dry heat absorption film, and the pores can enable air with higher temperature to be exchanged to a space covered by the film in the daytime. At night, no sunlight irradiates, the temperature of the mulching film drops, the volume of the spherical negative heat material expands along with the drop of the temperature, and the pores between the spherical negative heat material and the polymer matrix are reduced or closed, so that cold air at night is difficult to exchange into a space covered by the mulching film, and the mulching film plays a role in protecting crops covered by the mulching film from being damaged by the cold air at night.
The beneficial effects of the utility model are that the utility model relates to a ventilative endothermic liquid rubber base plastic film, through with negative heat material embedding liquid natural rubber composite humic acid air-dry heat absorption membrane, the plastic film absorbs the space that solar energy heating covered daytime, and the hole of plastic film risees and the grow along with the temperature, has strengthened the gas permeability of plastic film on daytime, and the hole of plastic film diminishes or closes along with the temperature decline night, prevents that cold air at night from entering into the space that the plastic film covered. The utility model discloses plastic film simple structure, convenient to use is applicable to and develops crops cultivation in the great cold area of difference in temperature round the clock winter.
Drawings
The following description is made in detail by way of example with reference to the accompanying drawings.
Fig. 1 is a schematic view of a structure of a gas-permeable heat-absorbing liquid rubber-based mulching film.
Fig. 2 is a structural schematic diagram of the liquid natural rubber composite humic acid air-drying heat absorption film.
Fig. 3 is a schematic view of the structure of a polyethylene-based film.
In the figure: 1-air-drying the heat absorption film by liquid natural rubber composite humic acid; 11-spherical negative thermal material; 2-a polyvinyl film; 21-micropores.
Detailed Description
Example 1
Referring to the attached drawing, the liquid rubber-based mulching film capable of ventilating and absorbing heat comprises a layer of liquid natural rubber composite humic acid air-drying heat-absorbing film(1) The solar heat-absorbing film is characterized in that spherical negative heat materials (11) are embedded in the liquid natural rubber composite humic acid air-drying heat-absorbing film, the upper surface and the lower surface of one layer of the liquid natural rubber composite humic acid air-drying heat-absorbing film are respectively compounded with one layer of polyvinyl film (2), and the polyvinyl films are uniformly distributed with air-permeable micropores (21). The thickness of the liquid natural rubber composite humic acid air-drying heat absorption film (1) is 0.1 cm. The spherical negative thermal material (11) is made of ZrW2O8And (3) preparing the compound. The diameter of the spherical negative thermal material (11) is 0.1cm, and the distribution number density of the spherical negative thermal material is 5/m2. The thickness of the polyethylene-based film (2) is 0.05 cm. The pore diameter of the polyethylene-based film is 0.02cm, and the air-permeable micropores (21) are uniformly distributed on the polyethylene-based film. The interval between the air-permeable micropores (21) which are uniformly distributed on the polyethylene base film and the adjacent micropores is 15 cm.
Example 2
Referring to the attached drawing, the breathable and heat-absorbing liquid rubber-based mulching film comprises a layer of liquid natural rubber composite humic acid air-drying heat-absorbing film (1), and is characterized in that spherical negative heat materials (11) are embedded in the liquid natural rubber composite humic acid air-drying heat-absorbing film, the upper surface and the lower surface of the layer of liquid natural rubber composite humic acid air-drying heat-absorbing film are respectively compounded with a layer of polyvinyl film (2), and breathable micropores (21) are uniformly distributed in the polyvinyl films. The thickness of the liquid natural rubber composite humic acid air-drying heat absorption film (1) is 0.6 cm. The spherical negative thermal material (11) is made of ZrW2O8And (3) preparing the compound. The diameter of the spherical negative thermal material (11) is 0.5cm, and the distribution number density of the spherical negative thermal material is 20/m2. The thickness of the polyethylene-based film (2) is 0.13 cm. The pore diameter of the polyethylene-based film is 0.18cm, and the air-permeable micropores (21) are uniformly distributed on the polyethylene-based film. The interval between the air-permeable micropores (21) uniformly distributed on the polyethylene base film and the adjacent micropores is 11 cm.
Example 3
Referring to the attached drawing, the air-permeable and heat-absorbing liquid rubber-based mulching film comprises a layer of liquid natural rubber composite humic acid air-drying heat-absorbing film (1) and is characterized in that spherical negative heat materials (11) are embedded in the liquid natural rubber composite humic acid air-drying heat-absorbing film,the upper surface and the lower surface of the liquid natural rubber composite humic acid air-drying heat absorption film are respectively compounded with a layer of polyvinyl film (2), and the polyvinyl films are uniformly distributed with air-permeable micropores (21). The thickness of the liquid natural rubber composite humic acid air-drying heat absorption film (1) is 1.1 cm. The spherical negative thermal material (11) is made of ZrW2O8And (3) preparing the compound. The diameter of the spherical negative thermal material (11) is 1.1cm, and the distribution number density of the spherical negative thermal material is 35/m2. The thickness of the polyethylene-based film (2) is 0.21 cm. The pore diameter of the polyethylene-based film is 0.35cm, and the air-permeable micropores (21) are uniformly distributed on the polyethylene-based film. The interval between the air-permeable micropores (21) uniformly distributed on the polyethylene base film and the adjacent micropores is 6 cm.
Example 4
Referring to the attached drawing, the breathable and heat-absorbing liquid rubber-based mulching film comprises a layer of liquid natural rubber composite humic acid air-drying heat-absorbing film (1), and is characterized in that spherical negative heat materials (11) are embedded in the liquid natural rubber composite humic acid air-drying heat-absorbing film, the upper surface and the lower surface of the layer of liquid natural rubber composite humic acid air-drying heat-absorbing film are respectively compounded with a layer of polyvinyl film (2), and breathable micropores (21) are uniformly distributed in the polyvinyl films. The thickness of the liquid natural rubber composite humic acid air-drying heat absorption film (1) is 1.5 cm. The spherical negative thermal material (11) is made of ZrW2O8And (3) preparing the compound. The diameter of the spherical negative thermal material (11) is 1.5cm, and the distribution number density of the spherical negative thermal material is 50/m2. The thickness of the polyethylene-based film (2) is 0.3 cm. The pore diameter of the polyethylene-based film is 0.5cm, and the air-permeable micropores (21) are uniformly distributed on the polyethylene-based film. The interval between the air-permeable micropores (21) which are uniformly distributed on the polyethylene base film and the adjacent micropores is 2 cm.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Claims (7)
1. The breathable and heat-absorbing liquid rubber-based mulching film is characterized by comprising a layer of liquid natural rubber composite humic acid air-drying heat-absorbing film (1), wherein spherical negative heat materials (11) are embedded in the liquid natural rubber composite humic acid air-drying heat-absorbing film, the upper surface and the lower surface of the layer of liquid natural rubber composite humic acid air-drying heat-absorbing film are respectively compounded with a layer of polyvinyl film (2), and breathable micropores (21) are uniformly distributed in the polyvinyl film.
2. A breathable and heat-absorbing liquid rubber-based mulching film according to claim 1, wherein the thickness of the liquid natural rubber composite humic acid air-drying heat-absorbing film (1) is 0.1-1.5 cm.
3. A breathable, heat-absorbing liquid rubber-based mulch film according to claim 1 wherein said spherical negative thermal material (11) is formed of ZrW2O8And (3) preparing the compound.
4. The air permeable heat absorbing liquid rubber-based mulching film according to claim 1, wherein the diameter of the spherical negative heat material (11) is 0.1-1.5 cm, and the distribution number density of the spherical negative heat material is 5-50 pieces/m2。
5. A breathable, heat-absorbing liquid rubber-based mulch film according to claim 1 wherein said polyethylene-based film (2) has a thickness of 0.05 to 0.3 cm.
6. The air permeable and heat absorbing liquid rubber-based mulching film according to claim 1, wherein the pores of the air permeable micropores (21) uniformly distributed in the polyethylene-based film are 0.02-0.5 cm in diameter.
7. The air permeable and heat absorbing liquid rubber-based mulching film according to claim 1, wherein the distance between the air permeable micropores (21) of the polyethylene-based film, which are uniformly distributed, and the adjacent micropores is 2-15 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020204604.9U CN212035156U (en) | 2020-02-25 | 2020-02-25 | Breathable and heat-absorbing liquid rubber-based mulching film |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020204604.9U CN212035156U (en) | 2020-02-25 | 2020-02-25 | Breathable and heat-absorbing liquid rubber-based mulching film |
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| Publication Number | Publication Date |
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| CN212035156U true CN212035156U (en) | 2020-12-01 |
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| CN202020204604.9U Expired - Fee Related CN212035156U (en) | 2020-02-25 | 2020-02-25 | Breathable and heat-absorbing liquid rubber-based mulching film |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114793722A (en) * | 2021-02-02 | 2022-07-29 | 南京林业大学 | Preparation method of anhydrous drip mulching film with ventilation regulated by load type negative heat material |
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2020
- 2020-02-25 CN CN202020204604.9U patent/CN212035156U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114793722A (en) * | 2021-02-02 | 2022-07-29 | 南京林业大学 | Preparation method of anhydrous drip mulching film with ventilation regulated by load type negative heat material |
| CN114793722B (en) * | 2021-02-02 | 2023-05-05 | 南京林业大学 | Preparation method of load type negative heat material regulated breathable drip-free mulching film |
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Granted publication date: 20201201 |