CN110920182A - Heat-insulating transparent cooling film and preparation method thereof - Google Patents
Heat-insulating transparent cooling film and preparation method thereof Download PDFInfo
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- CN110920182A CN110920182A CN201911114581.0A CN201911114581A CN110920182A CN 110920182 A CN110920182 A CN 110920182A CN 201911114581 A CN201911114581 A CN 201911114581A CN 110920182 A CN110920182 A CN 110920182A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/14—Greenhouses
- A01G9/1407—Greenhouses of flexible synthetic material
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/14—Greenhouses
- A01G9/1438—Covering materials therefor; Materials for protective coverings used for soil and plants, e.g. films, canopies, tunnels or cloches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/242—All polymers belonging to those covered by group B32B27/32
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/304—Insulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2410/00—Agriculture-related articles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Soil Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
Abstract
The invention belongs to the technical field of agricultural film preparation, and relates to a film, in particular to a heat-insulating transparent cooling film and a preparation method thereof; a co-extrusion composite film structure at least comprising an outer layer, a middle layer and an inner layer; the outer layer comprises PE, a heat insulating agent and an organic solvent, the middle layer comprises PE, and the inner layer comprises PE and a coating layer; the preparation method of the heat-insulating transparent cooling film comprises the steps of mixing the raw materials of the outer layer, the middle layer and the inner layer, mixing the raw materials by a screw of a co-extrusion film blowing device, extruding and plasticizing the mixture to form a melt; filtering by a filter, shunting to a die head through a runner, and extruding and compounding to form a film; the heat-insulation agricultural film provided by the invention has a smooth and flat surface, and the infrared blocking rate of the film is greatly improved on the premise of not obviously reducing the transparency, so that the heat-insulation effect is achieved, heating measures in a greenhouse are omitted, the energy is saved, and the heat-insulation agricultural film has a wide application value.
Description
Technical Field
The invention belongs to the technical field of agricultural film preparation, and relates to a film, in particular to a heat-insulating transparent cooling film and a preparation method thereof.
Background
With the development of economy and the adjustment of rural industrial structure, the market demand of the rural industry in China on plastic films is continuously rising. In order to meet the requirements of various aspects of agricultural production, agricultural plastic films are of various varieties and specifications. The plastic film is widely applied to the field of plastic greenhouses in the rural planting industry, and the plastic greenhouses are used for facility cultivation of vegetables, flowers and the like, so that the plastic film plays a special important role in relieving the contradiction between supply and demand of the vegetables in off season, and has remarkable social benefit and practical and huge economic benefit.
However, the existing greenhouse film has some problems in the using process, such as the infrared radiation energy which is injected into the ground in the greenhouse in the daytime is dissipated through the greenhouse film at night, the greenhouse temperature is greatly reduced, and particularly, the heat dissipation of the polyolefin dripping greenhouse film at night is faster than that of the common film; on the other hand, a large amount of infrared rays enters the greenhouse, especially at noon, so that the greenhouse is too warm to burn the crops.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a heat insulating transparent cooling film;
the invention is realized by the following steps:
a heat-insulating transparent cooling film at least comprises an outer layer, a middle layer and an inner layer which are of a co-extrusion composite film structure; the outer layer comprises PE, a heat insulating agent and an organic solvent, the middle layer comprises PE, and the inner layer comprises PE and a coating layer.
Furthermore, the heat insulating agent is nano powder, and the particle size of the nano powder is 1-100 nanometers, preferably 10-50 nanometers.
Further, the nano powder comprises one or more of nano cesium tungstate, nano nitride and nano carbide; the nano nitride comprises one or more of nano titanium nitride, nano silicon nitride and nano aluminum nitride; the nano-carbide comprises nano-silicon carbide and/or nano-titanium carbide.
Further, the organic solvent includes one or more of ethanol, isopropanol, ethyl acetate, butyl acetate, aromatic hydrocarbon, toluene and xylene.
Further, the coating layer comprises an aqueous stream-drip defogging coating liquid.
Further, the heat insulating agent accounts for 0.1-15% of the weight of the outer layer, and the organic solvent accounts for 4-25% of the weight of the outer layer.
Further, the inner layer and/or the middle layer and/or the outer layer also contain functional master batch, and the functional master batch comprises one or more of light stabilizer, metallocene and antioxidant.
Further, the weight ratio of the light stabilizer, the antioxidant and the metallocene is respectively 6-12%, 3-8% and 4-10.
The invention also provides a preparation method for preparing the heat-insulating transparent cooling film, which adopts the following technical scheme:
the preparation method of the heat-insulating transparent cooling film comprises the steps of mixing the raw materials of the outer layer, the middle layer and the inner layer, mixing the raw materials by a screw of a co-extrusion film blowing device, extruding and plasticizing the mixture to form a melt; filtering by a filter, shunting to a die head through a flow channel, and extruding and compounding to form a film.
Further, adding a heat insulating agent into an organic solvent to obtain a nanoparticle dispersion liquid, mixing and stirring the nanoparticle dispersion liquid, the PE, the light stabilizer, the antioxidant and the metallocene for granulation to obtain an outer layer raw material
The beneficial effect of above-mentioned scheme:
the heat-insulation agricultural film provided by the invention has a smooth and flat surface, and the infrared blocking rate of the film is greatly improved on the premise of not obviously reducing the transparency, so that the heat-insulation effect is achieved, heating measures in a greenhouse are omitted, the energy is saved, and the heat-insulation agricultural film has a wide application value.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural view of the present invention;
100. an outer layer; 200. a secondary outer layer; 300. a middle layer; 400. a secondary inner layer; 500. an inner layer.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
A heat-insulating transparent cooling film at least comprises an outer layer, a middle layer and an inner layer which are of a co-extrusion composite film structure; the outer layer comprises PE, a heat insulating agent and an organic solvent, the middle layer comprises PE, and the inner layer comprises PE and a coating layer.
The preparation method of the heat-insulating transparent cooling film comprises the steps of mixing the raw materials of the outer layer, the middle layer and the inner layer, mixing the raw materials by a screw of a co-extrusion film blowing device, extruding and plasticizing the mixture to form a melt; filtering by a filter, shunting to a die head through a flow channel, and extruding and compounding to form a film.
Example one
Referring to fig. 1, fig. 1 is a schematic view of a multi-layer heat-insulating transparent cooling film according to the present invention, as shown in fig. 1,
the film is of a five-layer structure and comprises an outer layer, a secondary outer layer, a middle layer, a secondary inner layer and an inner layer. Wherein the middle layer, the secondary inner layer and the secondary outer layer are made of the same material and have the same components.
A heat-insulating transparent cooling film with a five-layer co-extrusion composite film structure comprises an outer layer, a secondary outer layer, a middle layer, a secondary inner layer and an inner layer. The outer layer is made of PE added with 1% of heat insulating agent, 4% of organic solvent, 6% of light stabilizer, 3% of antioxidant and 4% of metallocene, the secondary inner layer is made of PE added with 6% of light stabilizer, 3% of antioxidant and 4% of metallocene, the middle layer is made of PE added with 6% of light stabilizer, 3% of antioxidant and 4% of metallocene, the secondary inner layer is made of PE added with 6% of light stabilizer, 3% of antioxidant and 4% of metallocene, and the inner layer is made of PE added with 6% of light stabilizer, 3% of antioxidant, 4% of metallocene and 2% of aqueous dripping fog-eliminating coating liquid.
Example two
A heat-insulating transparent cooling film with a five-layer co-extrusion composite film structure comprises an outer layer, a secondary outer layer, a middle layer, a secondary inner layer and an inner layer. The outer layer is made of PE added with 8% of heat insulating agent, 15% of organic solvent, 8% of light stabilizer, 5% of antioxidant and 6% of metallocene, the secondary inner layer is made of PE added with 8% of light stabilizer, 5% of antioxidant and 6% of metallocene, the middle layer is made of PE added with 8% of light stabilizer, 5% of antioxidant and 6% of metallocene, the secondary inner layer is made of PE added with 8% of light stabilizer, 5% of antioxidant and 6% of metallocene, and the inner layer is made of PE added with 8% of light stabilizer, 5% of antioxidant, 6% of metallocene and 4% of aqueous dripping fog-eliminating coating liquid.
EXAMPLE III
A heat-insulating transparent cooling film with a five-layer co-extrusion composite film structure comprises an outer layer, a secondary outer layer, a middle layer, a secondary inner layer and an inner layer. The outer layer is made of PE added with 15% of heat insulating agent, 25% of organic solvent, 12% of light stabilizer, 8% of antioxidant and 10% of metallocene, the secondary inner layer is made of PE added with 12% of light stabilizer, 8% of antioxidant and 10% of metallocene, the middle layer is made of PE added with 12% of light stabilizer, 8% of antioxidant and 10% of metallocene, the secondary inner layer is made of PE added with 12% of light stabilizer, 8% of antioxidant and 10% of metallocene, and the inner layer is made of PE added with 12% of light stabilizer, 8% of antioxidant, 10% of metallocene and 6% of aqueous dripping fog-eliminating coating liquid.
Example four
Aiming at the preparation method of the heat-insulating transparent cooling film of the first embodiment,
aiming at the preparation of the outer layer material:
adding 12.5 parts of polysiloxane solution into 82.5 parts of xylene, adding 5 parts of cesium tungstate powder with the original particle size of 20 nanometers into the polysiloxane xylene solution, performing sanding operation by using grinding beads with the diameter of 0.3 millimeter, and obtaining nano cesium tungstate dispersion with the average particle size of 83 nanometers after 12 hours.
Adding 120 parts of PE resin, 6 parts of light stabilizer, 3 parts of antioxidant and 4 parts of metallocene into 100 parts of nano cesium tungstate dispersion, mixing and stirring uniformly at room temperature, adding the mixture into a screw machine, and performing melt extrusion granulation.
Adding the particles, the secondary outer layer raw material, the middle layer raw material, the secondary inner layer raw material and the inner layer raw material into a screw of a total film blowing device, mixing, sending out and plasticizing to form a solution, filtering by a filter, shunting to a die head through a flow channel, and extruding to form a composite film. The content of cesium tungstate in the film was 10%.
EXAMPLE five
The film of example two was prepared, which is different from example four in that the amount of the added material was different and the content of cesium tungstate in the film was 9%.
EXAMPLE six
The film of example two was prepared, which is different from example four in that the amount of the added material was different and the content of cesium tungstate in the film was 10%.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A heat-insulating transparent cooling film is characterized by at least comprising a co-extrusion composite film structure of an outer layer, a middle layer and an inner layer; the outer layer comprises PE, a heat insulating agent, polysiloxane and an organic solvent, the middle layer comprises PE, and the inner layer comprises PE and a coating layer.
2. The heat-insulating transparent cooling film according to claim 1, wherein the heat-insulating agent is a nano powder, and the particle size of the nano powder is 1 to 100 nm, preferably 10 to 50 nm.
3. The heat-insulating transparent cooling film according to claim 2, wherein the nano powder comprises one or more of nano cesium tungstate, nano nitride and nano carbide; the nano nitride comprises one or more of nano titanium nitride, nano silicon nitride and nano aluminum nitride; the nano-carbide comprises nano-silicon carbide and/or nano-titanium carbide.
4. The heat-insulating transparent cooling film according to claim 3, wherein the organic solvent comprises one or more of ethanol, isopropanol, ethyl acetate, butyl acetate, aromatic hydrocarbon, toluene, and xylene.
5. The heat-insulating transparent cooling film according to claim 1, wherein the coating layer comprises an aqueous dripping and defogging coating solution, and the coating layer accounts for 2-6% of the inner layer by weight.
6. The heat-insulating transparent cooling film according to claim 4, wherein the heat-insulating agent accounts for 1-15% by weight of the outer layer, and the organic solvent accounts for 4-25% by weight of the outer layer.
7. The heat-insulating transparent cooling film according to claim 1, wherein the inner layer and/or the middle layer and/or the outer layer further comprises a functional master batch, and the functional master batch comprises one or more of a light stabilizer, a metallocene and an antioxidant.
8. The heat-insulating transparent cooling film according to claim 7, wherein the light stabilizer, the antioxidant and the metallocene are added in a weight ratio of 6-12%, 3-8% and 4-10%, respectively.
9. A preparation method of a heat-insulating transparent cooling film is characterized in that the outer layer, the middle layer and the inner layer of the film as claimed in claims 1-8 are mixed by a screw of a co-extrusion film blowing device and are extruded and plasticized into a melt; filtering by a filter, shunting to a die head through a flow channel, and extruding and compounding to form a film.
10. The preparation method of the heat-insulating transparent cooling film according to claim 9, wherein the heat-insulating agent is added to the organic solvent in which the polysiloxane is pre-dissolved to obtain a nanoparticle dispersion liquid, and the nanoparticle dispersion liquid, the PE, the light stabilizer, the antioxidant and the metallocene are mixed, stirred and granulated to obtain an outer layer raw material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911114581.0A CN110920182A (en) | 2019-11-14 | 2019-11-14 | Heat-insulating transparent cooling film and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911114581.0A CN110920182A (en) | 2019-11-14 | 2019-11-14 | Heat-insulating transparent cooling film and preparation method thereof |
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| CN110920182A true CN110920182A (en) | 2020-03-27 |
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| CN201911114581.0A Pending CN110920182A (en) | 2019-11-14 | 2019-11-14 | Heat-insulating transparent cooling film and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116811085A (en) * | 2023-06-06 | 2023-09-29 | 广东汇发塑业科技有限公司 | Real-time evaluation method for running state of multilayer coextrusion film blowing machine |
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| CN102754575A (en) * | 2012-06-28 | 2012-10-31 | 上海普拉斯克塑料有限公司 | Insect prevention and temperature reduction film |
| CN102756521A (en) * | 2012-06-28 | 2012-10-31 | 上海普拉斯克塑料有限公司 | Infrared absorption heat preservation film |
| CN102756522A (en) * | 2012-06-28 | 2012-10-31 | 上海普拉斯克塑料有限公司 | Ultraviolet ray separating greenhouse film |
| CN107057295A (en) * | 2017-02-23 | 2017-08-18 | 魏勇 | A kind of heat-insulated macromolecule membrane and preparation method thereof |
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2019
- 2019-11-14 CN CN201911114581.0A patent/CN110920182A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102754575A (en) * | 2012-06-28 | 2012-10-31 | 上海普拉斯克塑料有限公司 | Insect prevention and temperature reduction film |
| CN102756521A (en) * | 2012-06-28 | 2012-10-31 | 上海普拉斯克塑料有限公司 | Infrared absorption heat preservation film |
| CN102756522A (en) * | 2012-06-28 | 2012-10-31 | 上海普拉斯克塑料有限公司 | Ultraviolet ray separating greenhouse film |
| CN107057295A (en) * | 2017-02-23 | 2017-08-18 | 魏勇 | A kind of heat-insulated macromolecule membrane and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116811085A (en) * | 2023-06-06 | 2023-09-29 | 广东汇发塑业科技有限公司 | Real-time evaluation method for running state of multilayer coextrusion film blowing machine |
| CN116811085B (en) * | 2023-06-06 | 2024-02-20 | 广东汇发塑业科技有限公司 | Real-time evaluation method for running state of multilayer coextrusion film blowing machine |
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Application publication date: 20200327 |