CN104175579A - Double-layer hollow high thermal insulation greenhouse film and preparation method thereof - Google Patents
Double-layer hollow high thermal insulation greenhouse film and preparation method thereof Download PDFInfo
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- CN104175579A CN104175579A CN201410386704.7A CN201410386704A CN104175579A CN 104175579 A CN104175579 A CN 104175579A CN 201410386704 A CN201410386704 A CN 201410386704A CN 104175579 A CN104175579 A CN 104175579A
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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
- 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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Abstract
The invention discloses a method for preparing a double-layer hollow high thermal insulation greenhouse film. The method comprises the following steps: (1) weighing polyethylene, metallocene polyethylene and various aids in parts by weight for mixing, drying the mixture by using a dryer, and uniformly mixing the materials with an anti-reflection effect and a nanometer material by using a mixing machine; (2) feeding the mixture into a screw extruder through a metering feeder for fully fusing and mixing, and filtering to remove impurities through a screen exchanger; (3) feeding the hot-melt materials into a mold for performing high-temperature molding, preforming, discharging the double-layer greenhouse film from a mold outlet, and rapidly cooling and molding through a water-cooling device; and (4) performing secondary heating on the greenhouse film subjected to water-cooled molding in a drying device, discharging through traction and a guide roller, performing secondary setting and cooling, rolling through a rolling device, and cutting to obtain a finished product. The production process is simple, and the product is high in light transmission, high in heat preservation capacity, good in antifogging performance and long in service life.
Description
Technical field
The present invention relates to a kind of preparation method of canopy film, high thermal insulation greenhouse film of especially a kind of double layer hollow and preparation method thereof.
Background technology
Canopy film is applicable to growing vegetables and raise livestock, in agricultural, animal husbandry and aquaculture, has obtained a large amount of uses, and canopy film mulching and planting technology can promote plant growth, makes crop yield, also can realize and cultivate fruits and vegetables in cold season.At present, the common canopy membrane material of China is taking polyethylene (PE) as main, but exists the shortcoming that bad mechanical strength, the anti-snow ability of wind resistance weakly, easily aging are torn, insulating power is poor and easily hang water droplet, and great majority take and change for 1 year one.Domestic also have part canopy film to adopt polyvinyl chloride (PVC), ethylene/acetic acid ethene (EVA) and metallocene PE (m-PE), abroad useful PETG (PET), Merlon (PC) and polytetrafluoroethylene (PTFE) are prepared, although these products are functional, price is high and be unfavorable for the marketing of Peng Mo manufacturer.
Summary of the invention
For the deficiencies in the prior art, the invention provides the preparation method of the high thermal insulation greenhouse film of a kind of double layer hollow, its production technology is simple, save material cost, and properties of product is good.
Technical scheme of the present invention is: the preparation method of the high thermal insulation greenhouse film of a kind of double layer hollow, comprises the steps:
(1) taking by weight polyethylene, metallocene PE and various auxiliary agent mixes, auxiliary agent comprises antifoggant, anti-UV agent, age resister, lubricant and plasticizer, mixing temperature is 160-240 DEG C, time is 20-30 min, then be dried with drier, then material and transparent agent, nano material evenly mixed to 1-3min with blender;
(2) compound is sent in screw extruder and is carried out abundant melting, mixing by metering feeding machine, then removes by filter impurity through net-changing device;
(3) material of hot melt is fed through in the mould matching with the structure of double-deck canopy film to be processed and carries out high-temperature molding, this mould have be simultaneously connected with external compressed air for blowing the jet pipeline of film, after preformed, double-deck canopy film is sent and effectively isolates upper and lower rete from mould outlet, and this preformed canopy film is realized fast cooling shaping through water cooling plant;
(4) the canopy film after water-cooled moulding is delivered to post bake in drying unit, then through traction with deflector roll is sent and carry out cooling the cutting after again by wrap-up rolling of secondary sizing and must finished product.
In described step (2), the screw speed of extruder is turn/min of 10-50, and the temperature of processing subregion is the 1st district 150-160 DEG C, the 2nd district 160-170 DEG C, 3-the 7th district 180-185 DEG C; The machine barrel of described extruder is connected with negative pressure device, and control negative pressure be 0.08-0.1MPa, the gas being produced to draw in process, the little molecule of melt and moisture, thereby the mixing and plasticizing effect of improving material; Described net-changing device has double-deck 120-240 object filter screen, to strengthen filter effect; In described step (3), double-deck canopy film has upper film, lower film and reinforcement, and reinforcement is connected between upper and lower film and the cross section forming is triangle, square or rectangular, and the distance between upper and lower film is 2-15mm.
The high thermal insulation greenhouse film of a kind of double layer hollow, its material forms and comprises by weight: polyethylene and metallocene PE 60-100 part, transparent agent 0-30 part, nano material 1-10 part, antifoggant 1-5 part, anti-UV agent 0.5-2 part, age resister 0.5-2 part, lubricant 0.5-2 part, plasticizer 0.5-2 part.
Preferably, consisting of of described polyethylene and metallocene PE: low density polyethylene (LDPE) (LDPE) 20-30 part, LLDPE (LLDPE) 40-50 part, metallocene PE (ml-LDPE) 0-20 part.
Described transparent agent is at least one in polythene PE, polypropylene PP, Biaxially oriented polypropylene BOPP, polyvinylchloride; Nano material is TiO2 nano material or ZnO nano material; Antifoggant is glycerin monostearate; Lubricant is opening agent, talcum powder, diatomite, stearic acid or Metallic stearates; Plasticizer is selected polyalcohol.
Beneficial effect of the present invention is: 1, product specification can be by customization, it is the canopy film of being made by the composition of raw materials of high-quality, with the transparent PE of height, strengthen the ml-LDPE of toughness, transparent agent and be main body extrusion molding on plastic extrusion facility, promote end properties by the subregion control to extrusion temperature, and there is reinforcement in finished product centre, resistance to draw durable, anti-crushing by snow, uprising wind, and anti-fog performance is good, the outdoor life-span reaches more than 8 years, light transmission is good simultaneously, can improve the utilization rate of solar energy and the photosynthesis level of crop, thereby promote the precocious and volume increase of crop.2, because adopting double-decker centre to have air-isolation; insulating power is strengthened greatly; this Structure Decreasing the thermal conductivity factor of material; thermal resistance is large, not only can heat insulation but also storable heat, there is the function of automatic adjusting temperature indoor temperature; the room temperature decrease speed greatly slowing down the time after midnight; protected object is benefited, and the comparable outdoor temperature of indoor temperature in winter is high 17 DEG C, and ground temperature is higher more than 2 DEG C than the ground temperature of common canopy film.
Brief description of the drawings
Fig. 1 is process flow diagram of the present invention.
Fig. 2 is production method schematic diagram of the present invention.
In figure, 1-mixer hopper, 2-mixer, 3-drier, 4-blender, 5-metering feeding machine, 6-screw extruder, 7-net-changing device, 8-mould, 9-water cooling plant, 10-drying unit, 12-traction, 13-deflector roll, 14-wrap-up.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
As depicted in figs. 1 and 2, the technological process in the embodiment of the present invention is:
(1) taking by weight LDPE30kg, LLDPE50kg, metallocene PE 10 kg and various auxiliary agent is put in mixer 2 and is mixed by mixer hopper 1, auxiliary agent is antifoggant (glycerin monostearate) 2kg, anti-UV agent 1kg, age resister 1kg, lubricant 2kg(opening agent, calcium stearate, dolomol or barium stearate) and plasticizer 1kg, mixing temperature is 220 DEG C, time is 30 min, then be dried with drier 3, then material and PVC10kg, TiO2 nano material 5kg evenly mixed to 3min with blender 4;
(2) compound is sent into and in screw extruder 6, is carried out abundant melting, mixing by metering feeding machine 5, the screw speed of extruder 6 is controlled at 40 turn/min, the temperature of processing subregion is 160 DEG C, the 1st district, the 2nd 170 DEG C, district, 185 DEG C, 3-the 7th district, the machine barrel of described extruder is connected with negative pressure device, and the net-changing device 7 that is then 120 through double-deck order number removes by filter impurity;
(3) material of hot melt is fed through in the mould 8 matching with the structure of double-deck canopy film to be processed and carries out high-temperature molding, the structure of this bilayer canopy film is by upper film, lower film and reinforcement composition, reinforcement is connected in distance between the upper film of 3mm and lower film and be formed with leg-of-mutton cross section, this mould 8 have be simultaneously connected with external compressed air for blowing the jet pipeline of film, this jet pipeline has multiple jet branch roads between adjacent reinforcement, after preformed completes, the Compressed Gas of double-deck canopy film in jet branch road is on mould 8 outlets are sent and effectively isolated, lower rete, this preformed canopy film is realized fast cooling shaping through water cooling plant 9,
(4) the canopy film after water-cooled moulding is delivered to post bake in drying unit 10, then through drawing 12 and deflector roll 13 is sent and to carry out secondary sizing cooling again by wrap-up 14 rollings and cut and just obtained double layer hollow canopy film product.
That in above-described embodiment and description, describes just illustrates principle of the present invention and most preferred embodiment; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.
Claims (9)
1. a preparation method for the high thermal insulation greenhouse film of double layer hollow, comprises the steps:
(1) taking by weight polyethylene, metallocene PE and various auxiliary agent mixes, auxiliary agent comprises antifoggant, anti-UV agent, age resister, lubricant and plasticizer, mixing temperature is 160-240 DEG C, time is 20-30 min, then be dried with drier, then material and transparent agent, nano material evenly mixed to 1-3min with blender;
(2) compound is sent in screw extruder and is carried out abundant melting, mixing by metering feeding machine, then removes by filter impurity through net-changing device;
(3) material of hot melt is fed through in the mould matching with the structure of double-deck canopy film to be processed and carries out high-temperature molding, this mould have be simultaneously connected with external compressed air for blowing the jet pipeline of film, after preformed, double-deck canopy film is sent and effectively isolates upper and lower rete from mould outlet, and this preformed canopy film is realized fast cooling shaping through water cooling plant;
(4) the canopy film after water-cooled moulding is delivered to post bake in drying unit, then through traction with deflector roll is sent and carry out cooling the cutting after again by wrap-up rolling of secondary sizing and must finished product.
2. the preparation method of the high thermal insulation greenhouse film of double layer hollow according to claim 1, it is characterized in that: in described step (2), the screw speed of extruder is turn/min of 10-50, the temperature of processing subregion is the 1st district 150-160 DEG C, the 2nd district 160-170 DEG C, 3-the 7th district 180-185 DEG C, the machine barrel of described extruder is connected with negative pressure device, and described net-changing device adopts double-deck 120-240 object filter screen.
3. the preparation method of the high thermal insulation greenhouse film of double layer hollow according to claim 1, it is characterized in that: in described step (3), double-deck canopy film has upper film, lower film and reinforcement, reinforcement is connected between upper and lower film and the cross section forming is triangle, square or rectangular, and the distance between upper and lower film is 2-15mm.
4. the high thermal insulation greenhouse film of double layer hollow, its material forms and comprises by weight: polyethylene and metallocene PE 60-100 part, transparent agent 0-30 part, nano material 1-10 part, antifoggant 1-5 part, anti-UV agent 0.5-2 part, age resister 0.5-2 part, lubricant 0.5-2 part, plasticizer 0.5-2 part.
5. the high thermal insulation greenhouse film of double layer hollow according to claim 4, is characterized in that: the consisting of of described polyethylene and metallocene PE: low density polyethylene (LDPE) (LDPE) 20-30 part, LLDPE (LLDPE) 40-50 part, metallocene PE (ml-LDPE) 0-20 part.
6. according to the high thermal insulation greenhouse film of the double layer hollow described in claim 4 or 5, it is characterized in that: described transparent agent is at least one in polythene PE, polypropylene PP, Biaxially oriented polypropylene BOPP, polyvinylchloride.
7. according to the high thermal insulation greenhouse film of the double layer hollow described in claim 4 or 5, it is characterized in that: described nano material is TiO2 nano material or ZnO nano material.
8. according to the high thermal insulation greenhouse film of the double layer hollow described in claim 4 or 5, it is characterized in that: described antifoggant is glycerin monostearate.
9. according to the high thermal insulation greenhouse film of the double layer hollow described in claim 4 or 5, it is characterized in that: described lubricant is opening agent, talcum powder, diatomite, stearic acid or Metallic stearates.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410386704.7A CN104175579B (en) | 2014-08-08 | 2014-08-08 | A kind of double layer hollow height thermal insulation greenhouse film and preparation method thereof |
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| CN201410386704.7A CN104175579B (en) | 2014-08-08 | 2014-08-08 | A kind of double layer hollow height thermal insulation greenhouse film and preparation method thereof |
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| CN104175579A true CN104175579A (en) | 2014-12-03 |
| CN104175579B CN104175579B (en) | 2016-10-05 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104788786A (en) * | 2015-04-21 | 2015-07-22 | 苏州市鼎立包装有限公司 | PE stretch film material and preparation method thereof |
| CN104788787A (en) * | 2015-04-21 | 2015-07-22 | 苏州市鼎立包装有限公司 | Film material for greenhouse and preparation method of film material |
| CN106751120A (en) * | 2016-11-15 | 2017-05-31 | 苍南宇诺新材料科技有限公司 | High brightness plastic sheeting is formulated |
| CN109220956A (en) * | 2018-09-10 | 2019-01-18 | 巢湖市聚汇遮阳设备科技有限公司 | Shade structures for aquiculture green house |
| CN110698781A (en) * | 2019-10-28 | 2020-01-17 | 江阴市星宇化工有限公司 | High-activity tricalcium phosphate for high-flame-retardant polystyrene resin and production device thereof |
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| CN202179000U (en) * | 2011-08-18 | 2012-04-04 | 由朋双 | Air-filled, efficient and thermal-insulation greenhouse film |
| CN102688825A (en) * | 2012-05-23 | 2012-09-26 | 广东金明精机股份有限公司 | Coating device and coating process for functional coatings of agricultural films |
| CN103264563A (en) * | 2013-06-04 | 2013-08-28 | 河南省银丰塑料有限公司 | Three-layer co-extruded EVA (ethylene-vinyl acetate copolymer) long-life fog-dissipation environment-friendly multifunctional greenhouse film |
| US20140150338A1 (en) * | 2010-09-28 | 2014-06-05 | Masahiro Takafuji | Film for plant cultivation |
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2014
- 2014-08-08 CN CN201410386704.7A patent/CN104175579B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140150338A1 (en) * | 2010-09-28 | 2014-06-05 | Masahiro Takafuji | Film for plant cultivation |
| CN202179000U (en) * | 2011-08-18 | 2012-04-04 | 由朋双 | Air-filled, efficient and thermal-insulation greenhouse film |
| CN102688825A (en) * | 2012-05-23 | 2012-09-26 | 广东金明精机股份有限公司 | Coating device and coating process for functional coatings of agricultural films |
| CN103264563A (en) * | 2013-06-04 | 2013-08-28 | 河南省银丰塑料有限公司 | Three-layer co-extruded EVA (ethylene-vinyl acetate copolymer) long-life fog-dissipation environment-friendly multifunctional greenhouse film |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104788786A (en) * | 2015-04-21 | 2015-07-22 | 苏州市鼎立包装有限公司 | PE stretch film material and preparation method thereof |
| CN104788787A (en) * | 2015-04-21 | 2015-07-22 | 苏州市鼎立包装有限公司 | Film material for greenhouse and preparation method of film material |
| CN106751120A (en) * | 2016-11-15 | 2017-05-31 | 苍南宇诺新材料科技有限公司 | High brightness plastic sheeting is formulated |
| CN109220956A (en) * | 2018-09-10 | 2019-01-18 | 巢湖市聚汇遮阳设备科技有限公司 | Shade structures for aquiculture green house |
| CN110698781A (en) * | 2019-10-28 | 2020-01-17 | 江阴市星宇化工有限公司 | High-activity tricalcium phosphate for high-flame-retardant polystyrene resin and production device thereof |
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| Publication number | Publication date |
|---|---|
| CN104175579B (en) | 2016-10-05 |
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