CN102179930A - Method for producing agricultural greenhouse film by dry spray method - Google Patents
Method for producing agricultural greenhouse film by dry spray method Download PDFInfo
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- CN102179930A CN102179930A CN2011100032348A CN201110003234A CN102179930A CN 102179930 A CN102179930 A CN 102179930A CN 2011100032348 A CN2011100032348 A CN 2011100032348A CN 201110003234 A CN201110003234 A CN 201110003234A CN 102179930 A CN102179930 A CN 102179930A
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Abstract
A method for producing an agricultural greenhouse film by a dry spray method is characterized in that: solid materials are sprayed and attached onto an inner surface layer of a greenhouse film through a conveying device by an inner spraying method during a blow molding process, and the solid materials are prepared by -OH hydrophilic groups and -COOH hydrophobic groups with a mass ratio of 1:1. The invention reduces the friction among the film, a herringbone plate and a flashboard, and solves the jitter of tube bulbs. Therefore, the agricultural film product is flattened. No drying is necessary, which greatly reduces energy consumption and meets application requirements of any horticultural facility. The agricultural greenhouse film produced by the invention has greatly increased light transmittance, haze value, and thermal insulation performance; no selectivity of raw materials is required, and various materials are applicable.
Description
Technical field
The present invention relates to the green house of vegetables field, refer to that specifically a kind of dry spraying produces permanent fog dispersal drip agriculture greenhouse film.
Background technology
At the green house of vegetables film of China's use, kind has PVC completely without dripping a green house of vegetables film at present; EVA fog dispersal drip anti-aging film, the ageing-resistant film of polyethylene fog dispersal drip, these several films all are the inner additive type films, PVC is completely without dripping agricultural chemicals awning film developing history relatively early, because proportion is bigger than polyethylene, plant bad, the hardship of plant mouthfeel, replaced to some extent by EVA fog dispersal anti-dropping film.Interior additive process is after earlier antifogging agent, drip agent, age resistor being mixed, make masterbatch through twin-screw equipment or banburying extruding pelletization, and then join in the base resin by prescription, through batch mixing extrusion-blown modling, obtain the plastic sheeting for farm use goods, the problem that interior additive process exists is more: 1, the drip fog dispersal phase shorter, generally have only 3 wheat harvesting periods; 2, uncontrollable factor is more in the production process, as stirs inhomogeneously, and the drip phase anti-aging effect that can cause dispersing fog is bad, causes the dispute of product quality easily, influences plant growth.
Each plastic sheeting for farm use manufacturer was actual in conjunction with producing in practice in recent years, had researched and developed with drip agent directly to be coated on the surface of film, made it reach the drip elimination fog effect.This method grouting method or cry outer the coating.But according to practical application, owing to be that the aqueous solution and film article are bonding firm inadequately, moreover use (30 ℃) at low temperatures, temperature is lower, go up on temperature of shed daytime to above freezing more than 20 ℃ the time then, drip agent attached to the surface comes off under the situation of variations in temperature easily, influences the vegetable grower and uses, and does not reach the solidity forever, permanent of drip elimination fog effect.
Summary of the invention
The invention provides a kind of employing dry spraying, produce the method for agriculture greenhouse film, reach the purpose of permanent fog dispersal drip.
The present invention implements by the following technical programs:
A kind of dry spraying is produced the method for agriculture greenhouse film, it is characterized in that: the method for spraying in solid material is adopted by conveying device, it is sprayed in the blowing process and the inboard top layer attached to awning film on, described solid material be contain-the OH hydrophilic radical forms by the proportional arrangement of mass ratio 1:1 with-COOH hydrophobic grouping;
(1) extrude: solid material is placed the hopper of extruder and metering feed device respectively, and extruder is extruded into solid material in the head, and metering feed device transfers to solid material in the head by conveying device;
(2) blowing: the solid material of head the inside enters in the blowing envelope, and spraying method evenly is coated in awning film raw material inner surface in utilizing, and forms the fog dispersal drip functional membrane of one deck densification;
(3) by last traction, deflector roll, following traction and wrap-up, the rolling of dry spraying agriculture greenhouse film is become finished product.
The awning film raw material are selected a kind of among EVA, LLDPE, LDPE, the PVC.
Advantage of the present invention is:
(1) produces agriculture greenhouse film by dry spraying,, reduced the frictional force between film and collapser, the plate, solved the shake of envelope because skin can use the raw material that contain slipping agent.Thereby make that the plastic sheeting for farm use goods are smooth.
(2) the dry production agriculture greenhouse film need not be dried, and greatly reduces energy consumption
(3) width of processing plastic sheeting for farm use goods is unrestricted, and it is 10 meters to 20 meters canopy films that this production technology can be produced width.Satisfy the instructions for use of any horticultural facility.
(4) service life of agriculture greenhouse film, can bring up to 2--3 or longer time from original 1 year.Saved consumption of raw materials greatly.Saved the energy.
(5) light transmittance of agriculture greenhouse film, haze value, heat insulating ability all are greatly improved.
(6) this technology can be fit to various raw-material processing uses.No matter raw material, be that processing EVA, LLDPE, LDPE, PVC all can use if not being had selectivity.
Description of drawings:
Fig. 1 is outer spraying process technological process;
Fig. 2 is dry spraying technological process of the present invention;
Description of reference numerals:
Extruder, 2. head, 3. blowing bubble pipe, 4. on traction, 5. deflector roll, 6. time traction, 7. wrap-up, 8. metering feed device, 9. conveying device, 10. tank, 11. hoppers, 12. drying bakers.
The specific embodiment:
Describe the present invention below in conjunction with accompanying drawing.
On the spraying coating process of green house of vegetables film, the wet production agriculture greenhouse film has two kinds of methods (all being that liquid applies), a kind of is the outer method that is coated with, after being about to the mixing of a certain proportion of deionized water adding drip liquid, after tank soaks, on the online superficies that are coated in goods, curling after the drying obtains goods.Another kind is a grouting method, that is: secondary operations with the aqueous solution for preparing, film list wound opening, pours into the inboard rolling of film from a side with the drip aqueous solution and obtains moisture goods.
Be coated with the method technological process outward and see Fig. 1, mainly be: extrude → blowing → go up traction → tank immersion → both sides drying baker → upward traction → deflector roll → traction → rolling down.
The subject matter of wet production agriculture greenhouse film is:
(1) when producing agriculture greenhouse film, skin can not add slipping agent, cause the outer and collapser generation frictional force of plastic sheeting for farm use, cause the envelope instability, goods form the sugarcoated haws shape, cause the plastic sheeting for farm use out-of-flatness when user covers booth, high hollow pocket water phenomenon occurs, thereby influence is used, if add slipping agent then can cause the plastic sheeting for farm use product surface and the water solution flow drops can not bond together.Do not bring into play the effect of fog dispersal drip.Therefore, wet production fog dispersal drip awning film is selective to raw material.
(2) restricted width of plastic sheeting for farm use goods can not be used plate, if when wanting to reach wider width, then need transform the width of traction, and this can cause floor space to enlarge, and scrap build, increases investment.
(3) lower temperature resistance is poor, and the coating of wet production agriculture greenhouse film is under outdoor temperature-30 ℃ situation, temperature of shed rises to gradually+20 ℃ the time, through the cooling repeatedly----temperature-rise period of a period of time, drip agent will come off, and causes the face dewfall to influence printing opacity light rate.Cause the insect pest of vegetable crop susceptible disease, even the total crop failure of rotting.
(4) persistence is poor, can not realize with the life-span of agriculture greenhouse film synchronous.No matter be variation of temperature, or the user is when last canopy covers, all can causes easily, therefore easily cause the dispute on product quality of user and enterprise attached to the coming off of the drip agent coating of plastic sheeting for farm use product surface.
(5) heat insulating ability is poor, and is selective to base resin during the wet production agriculture greenhouse film, selects common polythene (not containing slipping agent) mostly for use; Polar resin EVA good heat insulating, but can't select for use.Therefore do not realize high heat insulating ability.
Fig. 2 is dry spraying technological process of the present invention, as shown in the figure, solid material is adopted the method for interior spraying by conveying device, it is sprayed in the blowing process and the inboard top layer attached to awning film on, described solid material be contain-the OH hydrophilic radical forms by the proportional arrangement of mass ratio 1:1 with-COOH hydrophobic grouping; , adopt the interior method that sprays by conveying device, make solid material in the blowing process, on spraying and the inboard top layer, reach the purpose of permanent fog dispersal drip attached to awning film.
Concrete processing step is:
(1) extrude: solid material is placed the hopper 11 of extruder 1 and metering feed device 8 respectively, and extruder 1 is extruded into solid material in the head 2, and metering feed device 8 transfers to solid material in the head 2 by conveying device 9;
(2) blowing: the solid material of head 2 the insides enters in the blowing envelope 3, and spraying method evenly is coated in awning film raw material inner surface in utilizing, and forms the fog dispersal drip functional membrane of one deck densification;
(3), the rolling of dry spraying agriculture greenhouse film is become finished product by last traction 4, deflector roll 5, draw 6 and wrap-up 7 down.
The method of the invention does not have specific (special) requirements to the awning film raw material, is applicable in EVA, LLDPE, LDPE, the PVC material any one.
The testing result of the awning film of dry method and wet production, i.e. physical and chemical index such as following table:
Testing result is analyzed as follows:
(1) hot strength: what wet method goods Mpa 〉=16 raw materials used is linear polyethylene and polyethylene from high pressure process mixture.There are not the good metallocene PE of working strength, polyethylene vinyl acetate copolymer (EVA).And dry method goods Mpa 〉=29.4 these explanations contain metallocene PE, polyethylene vinyl acetate copolymer, so the wet method goods are on raw material, and the kind of use is limited.
(2) angle tear strength: dry method goods kn/m 〉=194.2 are owing to adding the good raw material of intensity, so paracentesis resistance is good.And the angle tear strength of wet method goods is with regard to poor kn/m 〉=58.
(3) visible light transmittance rate: dry method goods % 〉=92.3; Wet method % 〉=85.The low photosynthesis of plants that influences of the light transmittance of wet method.
(4) mist degree: dry method goods %≤21; Wet method goods %≤30.The haze value of wet method is big, and the transparency is poor.The haze value of plastic sheeting for farm use goods is the smaller the better.
(5) 30 ℃ of contrasts of ﹣: the warmhouse booth of surviving the winter, owing to a little less than the winter sunlight light, under field conditions (factors), because outdoor temperature is low, form thin ice easily on face, the wet method goods easily freeze and influence light transmittance, thereby influence plant growth at low temperatures.
Claims (2)
1. a dry spraying is produced the method for agriculture greenhouse film, it is characterized in that: the method for spraying in solid material is adopted by conveying device, it is sprayed in the blowing process and the inboard top layer attached to awning film on, described solid material be contain-the OH hydrophilic radical forms by the proportional arrangement of mass ratio 1:1 with-COOH hydrophobic grouping;
The concrete processing step that dry spraying is produced agriculture greenhouse film is:
(1) extrude: solid material is placed the hopper of extruder and the hopper of metering feed device respectively, and extruder is extruded into solid material in the head, and metering feed device transfers to solid material in the head by conveying device;
(2) blowing: the solid material of head the inside enters in the blowing envelope, and spraying method evenly is coated in awning film raw material inner surface in utilizing, and forms the fog dispersal anti-dropping film of one deck densification;
(3) by last traction, deflector roll, following traction and wrap-up, the rolling of dry spraying agriculture greenhouse film is become finished product.
2. produce the method for agriculture greenhouse film according to the described dry spraying of claim 1, it is characterized in that: the awning film raw material are selected a kind of among EVA, LLDPE, LDPE, the PVC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110003234 CN102179930B (en) | 2011-01-10 | 2011-01-10 | Method for producing agricultural greenhouse film by dry spray method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110003234 CN102179930B (en) | 2011-01-10 | 2011-01-10 | Method for producing agricultural greenhouse film by dry spray method |
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| Publication Number | Publication Date |
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| CN102179930A true CN102179930A (en) | 2011-09-14 |
| CN102179930B CN102179930B (en) | 2013-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110003234 Expired - Fee Related CN102179930B (en) | 2011-01-10 | 2011-01-10 | Method for producing agricultural greenhouse film by dry spray method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB947636A (en) * | 1959-02-26 | 1964-01-22 | Swift & Co | Improvements in or relating to polymeric wrinkled films |
| CN2200531Y (en) * | 1993-05-24 | 1995-06-14 | 世韩产业株式会社 | Manufacturing device for shed mould insert reinforced wire as aeration device |
| CN1458224A (en) * | 2003-04-25 | 2003-11-26 | 北京华盾塑料有限责任公司 | EVA high thermal insulation covering film series and its producing process |
| CN101864105A (en) * | 2010-06-13 | 2010-10-20 | 山东农业大学 | Novel agricultural anti-drop defogging film |
| CN101905554A (en) * | 2009-06-03 | 2010-12-08 | 四平市顺达农膜有限公司 | Method for preparing polyethylene four-layer extruding composite multifunctional greenhouse film |
-
2011
- 2011-01-10 CN CN 201110003234 patent/CN102179930B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB947636A (en) * | 1959-02-26 | 1964-01-22 | Swift & Co | Improvements in or relating to polymeric wrinkled films |
| CN2200531Y (en) * | 1993-05-24 | 1995-06-14 | 世韩产业株式会社 | Manufacturing device for shed mould insert reinforced wire as aeration device |
| CN1458224A (en) * | 2003-04-25 | 2003-11-26 | 北京华盾塑料有限责任公司 | EVA high thermal insulation covering film series and its producing process |
| CN101905554A (en) * | 2009-06-03 | 2010-12-08 | 四平市顺达农膜有限公司 | Method for preparing polyethylene four-layer extruding composite multifunctional greenhouse film |
| CN101864105A (en) * | 2010-06-13 | 2010-10-20 | 山东农业大学 | Novel agricultural anti-drop defogging film |
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| CN102179930B (en) | 2013-09-18 |
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Effective date of registration: 20160115 Address after: 125100 Xingcheng, Heilongjiang Province, Liaoning Industrial Zone, No. 20 Patentee after: Liaoning Chenguang Plastic Co., Ltd. Address before: 110173, Dongling District, Liaoning, Shenyang Patentee before: Shenyang Chenguang Plastic Products Factory |
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Address after: 125100 Huludao, Liaoning Province, Xingcheng Industrial Zone, No. 20 Patentee after: Liaoning Chenguang plastic Limited by Share Ltd Address before: 125100 Xingcheng, Heilongjiang Province, Liaoning Industrial Zone, No. 20 Patentee before: Liaoning Chenguang Plastic Co., Ltd. |
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Granted publication date: 20130918 Termination date: 20190110 |
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