CN101331842B - LB light-wave optimization ecology agriculture greenhouse film and production method thereof - Google Patents
LB light-wave optimization ecology agriculture greenhouse film and production method thereof Download PDFInfo
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- 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
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Abstract
The invention discloses an LB light wave optimizing ecological agricultural film for vents and a production technology thereof, which belongs to the field of chemical industry. The LB light wave optimizing ecological agricultural film for the vents is a three-layer coextrusion agricultural film for the vents, wherein, the film is made from Langmuir-Blodgett film (LB), nanometer materials, an ultraviolet absorbent, paint and a light conversion agent by combining an inner adding method. The LB light wave optimizing ecological agricultural film for the vents manufactured according to the method of the invention has cleaner and brighter surface, has the function of optimizing natural light waves, can achieve the effects of long drain and fog dissipation, increases the effect of sterilization and deodorization in the vents, reduces the breeding of pests in the vents, relieves the erosion to the film by pesticide, leads the anti-aging period of the film to be prolonged, decomposes the harmful gases such as pesticide, and the like, in the air of the vents and increases the health of truck farmers, etc.
Description
Technical field
The present invention relates to a kind of LB light-wave optimization ecology agriculture greenhouse film, is to utilize interface molecular film (LB), nano material, ultra-violet absorber, pigment and light conversion agent, produces three-layer co-extruded agriculture greenhouse film in conjunction with interior adding method.The invention still further relates to the production method of this kind LB light-wave optimization ecology agriculture greenhouse film.Belong to agricultural science and technology and environmental area.
Background technology
The sun is the light source of all things on earth growth, and the drip fog dispersal function of agriculture greenhouse film allows sunlight better shine the interior crop of canopy to improve output exactly.But each wave band of sun light wave is different to the plant growth effect, and sun light wave impels all things on earth growth, also comprises harmful biology among all things on earth certainly.If can optimize natural light-wave band, suppress the insect growth, promote the photosynthetic effect of crops to improve output, advance flowering period is shortened crop growth period, adjust light wave, impel growth that root of the crop, stem, leaf emphasize particularly on different fields etc. according to Different Crop, with regard to the enough soils that day by day reduces of energy and the abundant natural daylight energy, increase substantially the output of crops, and reduce the fertilizer and pesticide consumption in a large number, produce green ecological food.
LB and nano material technology develop into today, have possessed the scientific and technological level that realizes the regulation and control light wave, just systematically are not applied among the plastic sheeting for farm use product up to now.There has been the rare-earth light conversion agent scientific and technological achievement to occur in recent years, can have partly realized the part conversion at visible light, but not have to be applied to the plastic sheeting for farm use field on a large scale; Ultra-violet absorber also only be used in film ageing-resistant on.
How to make the agriculture greenhouse film harmful light wave of shielding as far as possible, the transfer unwanted light is a using light, and ultrared heat is retained within the booth, is that High-efficient Production goes out the urgent problem that solves of green ecological food.
Summary of the invention
The purpose of this invention is to provide a kind of LB light-wave optimization ecology agriculture greenhouse film and production method thereof, this awning film utilizes LB technology, nano material, ultra-violet absorber, pigment and light conversion agent to regulate and control natural light wave, the light wave modification scope from the 290nm ultraviolet ray to the 400-800nm visible light, infrared ray more than 800nm and far infrared, shielding is harmful to light wave as far as possible, the transfer unwanted light is a using light, and ultrared heat is retained within the booth.Optimize and utilize the Nature to give our light energy source, reach the purpose of optimizing the ecological agriculture.
Technical scheme of the present invention is: a kind of LB light-wave optimization ecology agriculture greenhouse film, it is characterized in that, and form by Three Layer Coextruded Polyolefin film and LB film;
Described co-extrusion polyolefin film skin by ultra-violet absorber, nano titanium oxide, nanometer titanium dioxide zinc and nano silicon and polyethylene powder through stir, granulation, be processed into outer masterbatch; Wherein, the weight percent content of outer masterbatch middle-ultraviolet lamp absorbent is 3-5%; Nano titanium oxide, nanometer titanium dioxide zinc, nano silicon combination weight degree are 3-7%, and the weight percent content of polyethylene powder is 88-94%;
Described co-extrusion polyolefin film middle level by nano titanium oxide, nanometer titanium dioxide zinc and nano silicon and polyethylene powder through stir, granulation, be processed into the middle level masterbatch; Wherein, nano titanium oxide, nanometer titanium dioxide zinc, nano silicon combination weight degree are 3-7% in the masterbatch of middle level, and the weight percent content of polyethylene powder is 93-97%;
Described co-extrusion polyolefin film internal layer by nano titanium oxide, nanometer titanium dioxide zinc and nano silicon and polyethylene powder through stir, granulation, be processed into the internal layer masterbatch; Wherein, nano titanium oxide, nanometer titanium dioxide zinc, nano silicon combination weight degree are 5-10% in the internal layer masterbatch, and the weight percent content of polyethylene powder is 90-95%;
With skin, middle level and internal layer masterbatch respectively with the blending of polyolefin raw material, enter skin, middle level and internal layer extruder then respectively, extrude the Three Layer Coextruded Polyolefin film, each masterbatch and polyolefin raw material are all by 1: 9 part by weight blending;
With light efficiency spray coating liquor spray-coated film sublayer boundary, form the LB film;
Described nano titanium oxide, nanometer titanium dioxide zinc, nano silicon are meant the nanoscale product of particle diameter≤30nm.
Described light efficiency spray coating liquor of the present invention is: be made up of following raw materials by weight percent: high active surfactant 1-6%; Through chemically treated nano silicone micro mist or titanium, zinc powder 1-6%; Ludox 0.5-6%, distilled water 52-87%, isopropyl alcohol 10.5-30%; Described high active surfactant is selected for use fluorine-containing and/or silicon-containing surfactant.
Described light efficiency spray coating liquor of the present invention is: be made up of 1-3% high active surfactant, 3-10% nano grade titanium colloid and 87-96% distilled water, all be weight percentage; Described high active surfactant is selected for use fluorine-containing and/or silicon-containing surfactant; Described nano grade titanium colloid is selected the colloidal tio 2 of particle diameter≤20nm, colloid solid content≤30% for use.
The ratio of nano titanium oxide, nanometer titanium dioxide zinc, nano silicon three's consumption is 5: 4: 1 in described outer masterbatch of the present invention and the middle level masterbatch.
The ratio of nano titanium oxide, nanometer titanium dioxide zinc, nano silicon three's consumption is 2.5: 2: 5.5 in the described internal layer masterbatch of the present invention.
Ultra-violet absorber of the present invention adopts UV-326 or UV-9.
The awning film thickness of producing according to technology of the present invention is generally at 60-120um, and light efficiency self assembly hydridization molecular film thickness is 30-200nm.Produce the method for LB light-wave optimization ecology agriculture greenhouse film, it is characterized in that step is as follows:
1), with ultra-violet absorber and nano titanium oxide, nanometer titanium dioxide zinc, nano silicon according to a certain percentage with polyethylene powder through high-speed stirred, through the double screw extruder granulation, be processed into outer masterbatch;
2), with nano titanium oxide, nanometer titanium dioxide zinc, nano silicon according to a certain percentage with polyethylene powder through high-speed stirred, through the double screw extruder granulation, be processed into the middle level masterbatch;
3), with nano titanium oxide, nanometer titanium dioxide zinc, nano silicon according to a certain percentage with polyethylene powder through high-speed stirred, the internal layer masterbatch is processed in the double screw extruder granulation;
4), with skin, middle level and internal layer masterbatch respectively with the blending of polyolefin raw material, enter skin, middle level and internal layer extruder then respectively, extrude the Three Layer Coextruded Polyolefin film; Each masterbatch and polyolefin raw material are all by 1: 9 part by weight blending;
5), the light efficiency spray coating liquor is sprayed in the film bubble of film, with the air inflow and the capacity of automatic voltage regulator adjusting film bubble, with an amount of eliminating steam with inner spray coating device;
6), according to the plant growth needs, in each layer masterbatch, add fluorescent pigment or the photothermal converting agent of this layer masterbatch 300-5000PPM relatively.(promptly add the hundred ten thousand/300-5000 of material for this layer masterbatch.
The method that the present invention produces this kind LB light-wave optimization ecology agriculture greenhouse film is not limited to the described method of this specification, can also be 200710113745.9 with disclosed application number, name is called that production method realizes described in a kind of light boosting agriculture greenhouse film and the production technology thereof.
Principle of the present invention is:
1, utilizes ultraviolet absorbent uv-326 or UV-9 to be added on the skin of film, can absorb the ultraviolet light of a part of 290-400nm;
2, use nano titanium oxide, nanometer titanium dioxide zinc, nano silicon, forming different component as required mixes, add to respectively outer, in, in the internal layer, add the effect of ultra-violet absorber, the 320-385nm ultraviolet screener is fallen more than 99%;
3, add fluorescent pigment or photothermal converting agent according to the plant growth needs, make visible light produce red shift or blue shift, even light wave is changed to ruddiness R (600-700nm) and far-red light FR (700-800nm), or to blue light B (400-500m) conversion, or do other direction conversion as required; With pigment particularly fluorescent pigment or known rare-earth light conversion agent conversion visible light, abandon over and use the fixedly auxiliary agent and the ratio mode of production, can use pigment and rare-earth light conversion agent separately, also can compositely use, maximum magnitude, more accurate regulation and control light wave are to adapt to the growth of Different Crop in different time sections.
4, invent the light efficiency spray coating liquor spray-coated film sublayer boundary made from the inventor, realize light-catalyzed reaction with the ultraviolet ray in the daylight at film surface, destroy the energy key of organic gas molecule with the hydroxyl free radical that it produced, make organic gas become single gas molecule, accelerate the decomposition of organic substance, gas, to remove extremely near bacterium in the canopy face air, and it is smelly to eliminate the part animal, makes it be degraded into water or reduction becomes innocuous substance.
Beneficial effect of the present invention is:
Because the LB light-wave optimization ecology agriculture greenhouse film can shield the 320-385nm ultraviolet ray, the visible light of insect disappears, and has suppressed its movable and breeding, and the bacterium spore of insect and propagation thereof is fallen sharply, and reduces pesticide dosage, makes agricultural product become the green ecological product;
Because the LB light-wave optimization ecology agriculture greenhouse film can make visible light red shift or blue shift, can satisfy the needs of Different Crop to light wave.Such as: increase the R/FR value, can suppress the terminal bud overgrowing, output is flower, stalk and fruit more, also can promote plant root growth.The visible light light wave is varied to the influence of plant, and this product can reach various effects as required;
Because internal layer adds some nanometer grade silicas more, when can support film drip elimination fog effect, can effectively intercept and reflected infrared ray, increase booth night insulation effect;
The LB light-wave optimization ecology agriculture greenhouse film of manufacturing of the present invention has kept the multiple effectiveness of interface molecular film: 1) reach long-term drip elimination fog effect; 2) the utilization photocatalysis principle increases the effect of deodorization and sterilization in the canopy; 3) add antistatic additive in the spraying, make canopy film surface clean bright more; 4) evil of sick worm is given birth in the photocatalysis minimizing canopy; 5) alleviate the erosion of agricultural chemicals, the ageing-resistant phase of film is prolonged film; 6) decompose in the canopy in the air pernicious gas such as agricultural chemicals, it is healthy to promote the vegetable grower.
The specific embodiment
First's production equipment
The present invention utilizes existing three-layer co-extruded film unit to add the disclosed utility model patent of our company, and the patent No. is: 200720023344.X, name is called preparation self assembly molecule film device and produces.
The preparation of second portion light efficiency spray coating liquor:
The light efficiency spray coating liquor has two kinds:
A kind of spraying liquid for blow-moulding boundary molecular film horticultural covering film (formerly Chinese patent application 200810015058.8), it is made up of following raw materials by weight percent:
High active surfactant 1%-6%; Through chemically treated nano silicone micro mist or titanium, zinc powder 1-6%; Ludox 0.5-6%, distilled water 52-87%, isopropyl alcohol 10.5-30%; Described high active surfactant is selected for use fluorine-containing and/or silicon-containing surfactant.Described high active surfactant is selected organic silicon surfactant and/or dodecyl trimethyl ammonium fluoride for use, does not need specific proportion relation between the two.Through chemically treated nano silicone micro mist or titanium, zinc powder, comprise nanometer grade silica, Nano titanium dioxide, nanoscale zinc oxide etc., can be used alone, also can multiplely be used in combination, do not need specific proportion relation when multiple.
Its production method, step is as follows: earlier isopropyl alcohol is injected rustless steel container, again one or more high active surfactants are dissolved in isopropyl alcohol, stir, the distilled water that reinjects stirs, Ludox reinjects, stir, add one or more according to the prescription of different product demand again and stir, be re-dubbed spraying liquid for blow-moulding boundary molecular film horticultural covering film then through chemically treated nano silicone micro mist or titanium, zinc powder.Per ten thousand m2 polyolefin film materials need this kind blow-moulded film interface molecular film spray coating liquor 20-100kg.
Another kind of boundary molecular film light-effective sterilization breeding horticultural covering film spray coating liquor (formerly Chinese patent application 200810015057.3), it is made up of 1-3% high active surfactant, 3-10% nano grade titanium colloid and 87-96% distilled water, all is weight percentage; Described high active surfactant is selected for use fluorine-containing and/or silicon-containing surfactant; Described nano grade titanium colloid is selected the colloidal tio 2 of particle diameter≤20nm, colloid solid content≤30% for use.Described high active surfactant is selected organic silicon surfactant and/or dodecyl trimethyl ammonium fluoride for use, does not need specific proportion relation between the two.During application, per ten thousand m
2The polyolefin film material needs this kind boundary molecular film light-effective sterilization breeding horticultural covering film spray coating liquor 20-100kg.Production craft step of the present invention is as follows: earlier distilled water is injected rustless steel container, again fluorine-containing or silicon-containing surfactant are dissolved in distilled water, stir, the nano grade titanium colloid reinjects, stir, be re-dubbed the boundary molecular film light-effective sterilization breeding horticultural covering film spray coating liquor then.
According to the plant growth needs, in each layer masterbatch, add fluorescent pigment or the photothermal converting agent of this layer masterbatch 300-5000PPM relatively.(promptly add the hundred ten thousand/300-5000 of material for this layer masterbatch.Which layer masterbatch fluorescent pigment or photothermal converting agent are added in, it is fixed to come according to the plant growth needs, purpose is to make visible light produce red shift or blue shift, even light wave is to ruddiness R (600-700nm) and far-red light FR (700-800nm) conversion, or to blue light B (400-500m) conversion, or do other direction conversion as required; With pigment particularly fluorescent pigment or known rare-earth light conversion agent conversion visible light, abandon over and use the fixedly auxiliary agent and the ratio mode of production, can use pigment and rare-earth light conversion agent separately, also can compositely use, maximum magnitude, more accurate regulation and control light wave are to adapt to the growth of Different Crop in different time sections.
Third part embodiment:
Embodiment 1: produce 8 meters thick LB light-wave optimization ecology agriculture greenhouse films of wide 0.08mm with three layers of blowing plastic sheeting for farm use unit:
UV-9?1kg
Particle diameter≤30nm titanium dioxide 2.5kg
Particle diameter≤30nm zinc oxide 2kg
Particle diameter≤30nm silica 2kg
Spray coating liquor (200810015058.8 1 kinds spraying liquid for blow-moulding boundary molecular film horticultural covering film and production method) thereof 15kg
Spray coating liquor (200810015057.3 1 kinds of boundary molecular film light-effective sterilization breeding horticultural covering films spray coating liquor and production methods thereof) 15kg
With UV-9 and ratio is that 5: 4: 1 nano titanium oxide, nanometer titanium dioxide zinc, nano silicon adds powdery linear low density of polyethylene LLDPE and put into homogenizer and stir, and causes outer masterbatch through double screw extruder; 5: 4: 1 nano titanium oxides, nanometer titanium dioxide zinc, nano silicon adding powdery LLDPE are put into homogenizer and stir, cause the middle level masterbatch through double screw extruder; 2.5: 2: 5.5 nano titanium oxides, nanometer titanium dioxide zinc, nano silicon adding powdery LLDPE are put into homogenizer and stir internal layer masterbatch outside double screw extruder causes.Extrude unit according to 1: 9 ratio adding polyolefin raw material through film respectively again and carry out blowing production.
In the blowing production process, with interior spraying equipment two kinds of spray coating liquors (200810015058.8 1 kinds of spraying liquid for blow-moulding boundary molecular film horticultural covering film and production method thereof and 200810015057.3 1 kinds of boundary molecular film light-effective sterilization breeding horticultural covering films with spray coating liquor and production method thereof) are sprayed on film internal layer in the polyolefin film bubble.This film clarity is very high, and the drip elimination fog effect is more than 1 year, and tangible light wave ecological effect is arranged, and crop pesticide spraying amount can reduce more than 70% in the canopy, and output can improve more than 15%.
Embodiment 2: produce 8 meters thick LB light-wave optimization ecology agriculture greenhouse films of wide 0.08mm with three layers of blowing plastic sheeting for farm use unit:
UV-9?1kg
Particle diameter≤30nm titanium dioxide 3.5kg
Particle diameter≤30nm zinc oxide 3kg
Particle diameter≤30nm silica 3kg
Spray coating liquor (200810015058.8 1 kinds spraying liquid for blow-moulding boundary molecular film horticultural covering film and production method) thereof 20kg
Spray coating liquor (200810015057.3 1 kinds of boundary molecular film light-effective sterilization breeding horticultural covering films spray coating liquor and production methods thereof) 20kg
With UV-9 and ratio is that 5: 4: 1 nano titanium oxide, nanometer titanium dioxide zinc, nano silicon adds powdery LLDPE and put into homogenizer and stir, and causes internal layer and middle level masterbatch through double screw extruder; 2.5: 2: 5.5 nano titanium oxides, nanometer titanium dioxide zinc, nano silicon adding powdery LLDPE are put into homogenizer and stir, cause outer masterbatch through double screw extruder.Extrude unit through film and carry out blowing production adding the polyolefin raw material according to 1: 9 ratio respectively.In the blowing production process, with interior spraying equipment two kinds of spray coating liquors (200810015058.8 1 kinds of spraying liquid for blow-moulding boundary molecular film horticultural covering film and production method thereof and 200810015057.3 1 kinds of boundary molecular film light-effective sterilization breeding horticultural covering films with spray coating liquor and production method thereof) are sprayed on film internal layer in the polyolefin film bubble.This film clarity is very high, and the drip elimination fog effect is more than 1 year, and tangible light wave ecological effect is arranged, and crop pesticide spraying amount can reduce more than 70% in the canopy, and output can improve more than 15%.
Claims (3)
1. a LB light-wave optimization ecology agriculture greenhouse film is characterized in that, is made up of Three Layer Coextruded Polyolefin film and interface molecule L B film;
Described co-extrusion polyolefin film skin by ultra-violet absorber, nano titanium oxide, nanometer titanium dioxide zinc and nano silicon and polyethylene powder through stir, granulation, be processed into outer masterbatch; Wherein, the weight percent content of outer masterbatch middle-ultraviolet lamp absorbent is 3-5%; Nano titanium oxide, nanometer titanium dioxide zinc, nano silicon combination weight degree are 3-7%, and the weight percent content of polyethylene powder is 88-94%; The ratio of nano titanium oxide, nanometer titanium dioxide zinc, nano silicon three's consumption is 5: 4: 1 in the described outer masterbatch;
Described co-extrusion polyolefin film middle level by nano titanium oxide, nanometer titanium dioxide zinc and nano silicon and polyethylene powder through stir, granulation, be processed into the middle level masterbatch; Wherein, nano titanium oxide, nanometer titanium dioxide zinc, nano silicon combination weight degree are 3-7% in the masterbatch of middle level, and the weight percent content of polyethylene powder is 93-97%; The ratio of nano titanium oxide, nanometer titanium dioxide zinc, nano silicon three's consumption is 5: 4: 1 in the masterbatch of described middle level;
Described co-extrusion polyolefin film internal layer by nano titanium oxide, nanometer titanium dioxide zinc and nano silicon and polyethylene powder through stir, granulation, be processed into the internal layer masterbatch; Wherein, nano titanium oxide, nanometer titanium dioxide zinc, nano silicon combination weight degree are 5-10% in the internal layer masterbatch, and the weight percent content of polyethylene powder is 90-95%; The ratio of nano titanium oxide, nanometer titanium dioxide zinc, nano silicon three's consumption is 2.5: 2: 5.5 in the described internal layer masterbatch;
With skin, middle level and internal layer masterbatch respectively with the blending of polyolefin raw material, enter skin, middle level and internal layer extruder then respectively, extrude the Three Layer Coextruded Polyolefin film, each masterbatch and polyolefin raw material are all by 1: 9 part by weight blending;
With light efficiency spray coating liquor spray-coated film sublayer boundary, form interface molecule L B film;
Described light efficiency spray coating liquor is by the 1%-6% high active surfactant, 1%-6% is through chemically treated nano silicone micro mist or titanium, zinc powder, the 0.5%-6% Ludox, 52%-87% distilled water, the 10.5%-30% isopropyl alcohol is formed, perhaps form, all be weight percentage by 1-3% high active surfactant, 3-10% nano grade titanium colloid and 87-96% distilled water; Described high active surfactant is selected for use fluorine-containing and/or silicon-containing surfactant; Described nano grade titanium colloid is selected the colloidal tio 2 of particle diameter≤20nm, colloid solid content≤30% for use;
Described nano titanium oxide, nanometer titanium dioxide zinc, nano silicon are meant the nanoscale product of particle diameter≤30nm.
2. a kind of LB light-wave optimization ecology agriculture greenhouse film according to claim 1 is characterized in that, described ultra-violet absorber adopts UV-326 or UV-9.
3. the method for the described LB light-wave optimization ecology agriculture greenhouse film of production claim 1 is characterized in that step is as follows:
1), with ultra-violet absorber and nano titanium oxide, nanometer titanium dioxide zinc, nano silicon according to a certain percentage with polyethylene powder through high-speed stirred, through the double screw extruder granulation, be processed into outer masterbatch;
2), with nano titanium oxide, nanometer titanium dioxide zinc, nano silicon according to a certain percentage with polyethylene powder through high-speed stirred, through the double screw extruder granulation, be processed into the middle level masterbatch;
3), with nano titanium oxide, nanometer titanium dioxide zinc, nano silicon according to a certain percentage with polyethylene powder through high-speed stirred, the internal layer masterbatch is processed in the double screw extruder granulation;
4), with skin, middle level and internal layer masterbatch respectively with the blending of polyolefin raw material, enter skin, middle level and internal layer extruder then respectively, extrude the Three Layer Coextruded Polyolefin film; Each masterbatch and polyolefin raw material are all by 1: 9 part by weight blending;
5), the light efficiency spray coating liquor is sprayed in the film bubble of film, with the air inflow and the capacity of automatic voltage regulator adjusting film bubble, with an amount of eliminating steam with inner spray coating device;
6) in each layer masterbatch, add 300-5000PPM fluorescent pigment or photothermal converting agent according to the plant growth needs.
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| CN2008101387815A CN101331842B (en) | 2008-08-05 | 2008-08-05 | LB light-wave optimization ecology agriculture greenhouse film and production method thereof |
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| CN2008101387815A CN101331842B (en) | 2008-08-05 | 2008-08-05 | LB light-wave optimization ecology agriculture greenhouse film and production method thereof |
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| CN101331842B true CN101331842B (en) | 2010-08-25 |
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| CN102756522B (en) * | 2012-06-28 | 2015-12-16 | 上海普拉斯克塑料有限公司 | Ultraviolet isolating greenhouse films |
| CN103087393B (en) * | 2013-02-19 | 2014-12-31 | 刘德元 | Converted blue light long-life-light-conversion multifunctional mulching film |
| CN106633563B (en) * | 2016-10-09 | 2019-01-29 | 聊城华塑工业有限公司 | Polyolefin skins film masterbatch with dust reduction capability and its application in greenhouse films |
| CN106982681A (en) * | 2017-02-27 | 2017-07-28 | 马鞍山绿丰种业有限公司 | Agricultural plastic film and preparation method thereof |
| CN106976291B (en) * | 2017-03-29 | 2019-02-19 | 嘉兴市南湖花卉园艺工程有限公司 | A kind of awning film and preparation method thereof |
| CN106883494A (en) * | 2017-03-30 | 2017-06-23 | 浙江新洋科技股份有限公司 | A kind of awning film and preparation method thereof |
| CN107384054A (en) * | 2017-07-17 | 2017-11-24 | 河北卫华电工机械有限公司 | A kind of sunlight board light conversion coating with purification air and self-cleaning function |
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| CN107820937A (en) * | 2017-11-06 | 2018-03-23 | 马鞍山市全润农业科技有限公司 | A kind of high-performance agriculture greenhouse film and preparation method thereof |
| CN108925298A (en) * | 2018-08-03 | 2018-12-04 | 东莞市济丰农业生态园开发有限公司 | A kind of awning film and preparation method thereof that can shorten the crop growth period |
| CN112640787B (en) * | 2020-12-15 | 2022-12-20 | 山东清田塑工有限公司 | Special flame-retardant and aging-resistant polyethylene film for covering cultivation greenhouse and preparation method thereof |
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