CN104893064A - Anti-aging plastic film for vegetable greenhouses and preparation method thereof - Google Patents
Anti-aging plastic film for vegetable greenhouses and preparation method thereof Download PDFInfo
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
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- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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- C—CHEMISTRY; METALLURGY
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
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- C08J2423/08—Copolymers of ethene
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/26—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers modified by chemical after-treatment
- C08J2423/28—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers modified by chemical after-treatment by reaction with halogens or halogen-containing compounds
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- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
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Abstract
The application discloses an anti-aging plastic film for vegetable greenhouses and a preparation method thereof. The method comprises: weighing out the following components in parts by weight: LDPE, magnesium hydroxide, sulfur, sodium aluminate, phosphite, polyurethane, an antioxidant, magnesium sulfate, tetraethyl thiuram disulfide, PU, an ultraviolet absorber, EVA, zinc stearate, CPE and LLDPE; mixing the components; and extruding the mixture to perform film blowing. For a product, the tensile strength is 15-35 MPa, and the elongation at break is 250-550%; the right angle tear strength is 105-125 kN/m, and the retention rate of the elongation after 8-10 months of natural exposure is 85-90%; the light transmittance is 85-89%, and the tensile strength is 3-5 MPa; and the impact energy is 1.41-1.45J.
Description
Technical field
The application belongs to poly-CPE field of membrane preparation, particularly relates to a kind of anti-aging plastic film used for vegetable greenhouse and preparation method thereof.
Background technology
With the film that polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins are made, for packaging, and be used as coating layer.The commercially shared share of plastic wrapping and plastic packet product is increasing, particularly composite plastic soft packaging, the fields such as food, medicine, chemical industry are widely used in, wherein maximum with food product pack proportion again, such as drink pack, quickfrozen food packaging, cooking food packaging, snack food product packaging etc., these products all bring great convenience to people's life.Low-density polyethylene film generally adopts blowing and curtain coating two kinds of techniques to make.The thickness of curtain coating polyethylene film is even, but due to price higher, cost is lower, so be most widely used.Low-density polyethylene film is a kind of translucent, glossy, film that quality is more soft, has excellent chemical stability, heat sealability, water tolerance and moistureproofness, resistance to freezing, can poach.Its main drawback is poor to the barrier of oxygen, is usually used in the internal layer membrane of composite soft packaging material, and is current most widely used general, a kind of plastic film that consumption is maximum, accounts for more than 40% of plastic film consumption.Due to not polar functionalities in polyethylene molecule, and degree of crystallinity is high, and surface free energy is low, and therefore, the printing performance of this film is poor, to the poor adhesive force of ink and sizing agent, so need to carry out surface treatment before printing and compound.Along with the adjustment of expanding economy and the structure of rural undertaking, the market requirement of Chinese all trades and professions to plastics film constantly rises.Within 2005, the annual whole plastics film production and supply enterprises in whole nation total cumulative output value of industry reaches 79,910,504,000 yuan, increase by 29% than last year, accumulative business unit number 1223, annual accumulative product sales revenue 77,417,653,000 yuan, 25.89% is increased than same period last year, accumulated profit total value reaches 2,384,871,000 yuan.The whole industry per capita sales rate is 488,266.94 yuan.The whole plastics film production and supply enterprises in the whole nation first half of the year in 2006 total cumulative output value of industry reaches 43,959,811,000 yuan, increase by 17.31% than same period last year, accumulative business unit number 1299, accumulative product sales revenue 44,040,148,000 yuan, 22.11% is increased than same period last year, accumulated profit total value reaches 1,213,127,000 yuan.The sales rate per capita of the whole industry is 889,069.85 yuan.All in all, the management state of national plastics film production and supply enterprise is good.The output of Chinese Plastics film accounts for 20% of plastics ultimate production, is increase of production one of classification faster in plastics.From the Application Areas of Chinese plastics film (thickness is 0.06mm ~ 0.26mm), consumption is maximum, kind is maximum, most widely used is packaging industry, and its consumption accounts for 2/3, is secondly that agricultural accounts for 30%, having is exactly functional membrane again, as microporous membrane, screened film, geomembrane etc.Nearly all synthetic resins all may film forming in theory, but has economic implications, becomes commodity, consumption is maximum is the resins such as polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), ethylene/acetic acid ethene (EVA), polyamide (PA).If add suitable additives for plastics in resin matrix, required various functional films just can be prepared.Production method on plastic film industry has rolling process and extrusion molding, wherein extrusion molding is divided into again and extrudes blown film, extrudes curtain coating, extrudes stretching (also known as post forming) etc., current extrusion molding is most widely used general, especially for the processing of polyolefin film, and rolling process is mainly used in the production of some polyvinyl chloride films.
Along with high molecular polymer-polyvinyl chloride, poly generation, plastics film is widely used in agricultural.Japan and American-European countries cover hotbed in initial stage fifties applied film and succeed, and covering hut and greenhouse also obtain good result again subsequently.China introduces poly agricultural film in autumn nineteen fifty-five, is first used for hut in Beijing and covers vegetables, obtain the effect of precocious volume increase.Booth is former is the specific equipment of Vegetable produce, along with the application of the development booth produced is all the more extensive.Current booth is for potted flower and cut-flower cultivation; Production of fruit trees is used for cultivating grape, strawberry, watermelon, muskmelon, peach and citrus etc.; Production of forestry is used for the cultivation etc. of forest seedling growth, ornamental trees; Aquaculture is used for sericulture, poultry, cowboying, raises pigs, fish and fry etc.The range of application of booth is still in exploitation.Especially in extremely frigid zones, sandy wasteland and arid area for resist low temperature arid and hazards of sand storms play significant role.Countries in the world are that developing agricultural production successively builds up plastic greenhouse, and Japan is 10-20 hectare at the area of plastic greenhouse at the end of the seventies.Hispanic A Ermeilili area all land area is 315 square kilometres, and be a drought-hit area, covering the booth of 120 square kilometres to develop Vegetable produce, is booth the biggest in the world.The physical abuse, particularly bamboo frame booth of canopy film to be avoided during buckle film as far as possible, first part outstanding for frame surface should be scabbled before buckle film, or bandage with old cloth.When fixing with spring, answer cushioning one deck old newspaper at draw-in groove place.To note in addition avoiding new and old film Long Term Contact, in order to avoid accelerate the aging of new film.To be careful when ventilation operation.Film is endured cold or is tanned by the sun, and can promote aging, steel pipe tanned by the sun through the sun in summer, and temperature can rise to 60-70 DEG C, thus accelerates the aging fragmentation of film.In film use procedure, there is holes unavoidably, timely tackiness agent or the sticky benefit of adhesive tape.Two, environmental quality and regulation and control booth are because there being covered rearing with plastic film, define the special miniclimate that relative closure is different from open country.Carry out green house of vegetables cultivation, the feature of booth environment must be grasped, and take corresponding regulation measure, meet the condition of vegetable growth, thus obtain good quality and high output.
Green house of vegetables is a kind of framework structure of film with outstanding heat-insulating property, and it occurs making people to have vegetables in improper season.General green house of vegetables uses the skeleton of bamboo structure or steel construction, is covered with one or more layers thermal insulation plastic film above, material is thus formed a greenhouse space.The loss of the carbonic acid gas that adventitia stops inner vegetable growth to produce well, makes to have good heat insulation effect in canopy.Green house of vegetables commercial affairs refer to the green house of vegetables industry portal website built on this platform of internet, be positioned green house of vegetables, green house of vegetables is built, the service of planting vegetable in greenhouse and relevant industries, any industry personage can apply for (comprising unit and individuality) form of member, enjoy the facility service that green house of vegetables network brings you, such as: have from traditional issue supply-demand information, to online connection, arrive completely open user oneself again and upload product picture, issue quotation, automatically build a station, online transaction, online counter etc. function, and constantly improve and develop new type function, make domestic consumer can enjoy Internet to the huge help that brings of this traditional old industry.
Chinese Plastics film industry is in a flourish stage, it is reported, the demand of Chinese Plastics film every year by with more than 9% speed increment.And constantly emerge in large numbers along with various novel material, new installation and novel process, the plastics film of China will be impelled towards diversification of varieties, customizations and possess multi-functional composite membrane future development.Along with the development of China's economic and the adjustment of the structure of rural undertaking, the market requirement of Chinese all trades and professions to plastics film constantly rises.Predict that global plastics films in 2015 and sheet material apparent consumption are expected to reach 5,070 ten thousand tons, wherein the Asian-Pacific area estimates to become fastest-rising regional markets.Chinese Plastics film industry is current is in flourish stage, and 2001-2011 market scale average annual growth rate reaches more than 18%, estimates within 2012, to reach 3,500 hundred million yuan.And universal along with humanity concept, and the formation of novel harmonious society, designs the high and anti-aging plastic film used for vegetable greenhouse that shock strength is high and preparation method thereof of a kind of tensile strength, elongation and tear strength and is very important.
Summary of the invention
the technical problem solved:
The application, for above-mentioned technical problem, provides a kind of anti-aging plastic film used for vegetable greenhouse and preparation method thereof, solves the technical problems such as existing LDPE tensile strength, elongation and tear strength are low.
technical scheme:
A kind of anti-aging plastic film used for vegetable greenhouse, the raw materials by weight portion proportioning of described anti-aging plastic film used for vegetable greenhouse is as follows: LDPE100 part; Magnesium hydroxide 10-30 part; Sulphur 0.1-0.5 part; Sodium aluminate 15-35 part; Phosphorous acid ester 0.2-0.8 part; Urethane 1-5 part; Oxidation inhibitor 0.1-0.5 part; Magnesium sulfate 5-25 part; Tetraethylthiuram disulfide 0.15-0.55 part; PU is 10-30 part; UV light absorber 0.15-0.55 part; EVA is 10-30 part; Zinic stearas 0.5-2.5 part; CPE5-25 part; LLDPE is 30-50 part.
As a preferred technical solution of the present invention: the raw materials by weight portion proportioning of described anti-aging plastic film used for vegetable greenhouse is as follows: LDPE100 part; Magnesium hydroxide 15-25 part; Sulphur 0.2-0.4 part; Sodium aluminate 20-30 part; Phosphorous acid ester 0.3-0.7 part; Urethane 2-4 part; Oxidation inhibitor 0.2-0.4 part; Magnesium sulfate 10-20 part; Tetraethylthiuram disulfide 0.25-0.45 part; PU is 15-25 part; UV light absorber 0.25-0.45 part; EVA is 15-25 part; Zinic stearas 1-2 part; CPE10-20 part; LLDPE is 35-45 part.
As a preferred technical solution of the present invention: the raw materials by weight portion proportioning of described anti-aging plastic film used for vegetable greenhouse is as follows: LDPE100 part; Magnesium hydroxide 20 parts; 0.3 part, sulphur; Sodium aluminate 25 parts; Phosphorous acid ester 0.5 part; Urethane 3 parts; 0.3 part, oxidation inhibitor; 15 parts, magnesium sulfate; Tetraethylthiuram disulfide 0.35 part; PU is 20 parts; UV light absorber 0.35 part; EVA is 20 parts; Zinic stearas 1.5 parts; CPE15 part; LLDPE is 40 parts.
As a preferred technical solution of the present invention: described oxidation inhibitor adopts antioxidant 1010 or anti-oxidant DLTP.
As a preferred technical solution of the present invention: described UV light absorber adopts UV-531 or UV-327.
As a preferred technical solution of the present invention: the preparation method of described anti-aging plastic film used for vegetable greenhouse, comprises the steps:
The first step: take LDPE, magnesium hydroxide, sulphur, sodium aluminate, phosphorous acid ester, urethane, oxidation inhibitor, magnesium sulfate, tetraethylthiuram disulfide, PU, UV light absorber, EVA, Zinic stearas, CPE and LLDPE according to parts by weight proportioning;
Second step: LDPE, magnesium hydroxide, sulphur, sodium aluminate and phosphorous acid ester are dropped in reactor and is heated to 50-70 DEG C, stir 10-30min;
3rd step: add surplus stock, be warming up to 60-80 DEG C, stirs 25-45min;
4th step: mixed material is dropped in twin screw extruder and extrudes, barrel temperature 140 DEG C, 145 DEG C, 150 DEG C, 165 DEG C and 180 DEG C, machine head port mould temperature 170-180 DEG C, blow-up ratio 2-3, stretch ratio 3-4, screw speed 10-60r/min, pulling speed 6-8m/min.
beneficial effect:
One of the present invention anti-aging plastic used for vegetable greenhouse film and preparation method thereof adopts above technical scheme compared with prior art, has following technique effect: 1, product tensile strength 15-35MPa, elongation at break 250-550%; 2, angle tear strength 105-125kN/m, natural solarization 8-10 month percent retention of elongation 85-90%; 3, transmittance 85-89%, tensile strength 3-5MPa; 4, shock resistance energy 1.41-1.45J, the widespread production not division of history into periods can replace current material.
Embodiment
embodiment 1:
LDPE100 part is taken according to parts by weight proportioning; Magnesium hydroxide 10 parts; 0.1 part, sulphur; Sodium aluminate 15 parts; Phosphorous acid ester 0.2 part; Urethane 1 part; Anti-oxidant DLTP 0.1 part; 5 parts, magnesium sulfate; Tetraethylthiuram disulfide 0.15 part; PU is 10 parts; UV light absorber UV-327 is 0.15 part; EVA is 10 parts; Zinic stearas 0.5 part; CPE5 part; LLDPE is 30 parts.
LDPE, magnesium hydroxide, sulphur, sodium aluminate and phosphorous acid ester are dropped in reactor and is heated to 50 DEG C, stir 10min, add surplus stock, be warming up to 60 DEG C, stir 25min.
Mixed material is dropped in twin screw extruder and extrudes, barrel temperature 140 DEG C, 145 DEG C, 150 DEG C, 165 DEG C and 180 DEG C, machine head port mould temperature 170 DEG C, blow-up ratio 2, stretch ratio 3, screw speed 10r/min, pulling speed 6m/min.
Product tensile strength 15MPa, elongation at break 250%; Angle tear strength 105kN/m, natural solarization 8 months percent retention of elongations 85%; Transmittance 85%, tensile strength 3MPa; Shock resistance energy 1.41J.
embodiment 2:
LDPE100 part is taken according to parts by weight proportioning; Magnesium hydroxide 30 parts; 0.5 part, sulphur; Sodium aluminate 35 parts; Phosphorous acid ester 0.8 part; Urethane 5 parts; Anti-oxidant DLTP 0.5 part; 25 parts, magnesium sulfate; Tetraethylthiuram disulfide 0.55 part; PU is 30 parts; UV light absorber UV-327 is 0.55 part; EVA is 30 parts; Zinic stearas 2.5 parts; CPE25 part; LLDPE is 50 parts.
LDPE, magnesium hydroxide, sulphur, sodium aluminate and phosphorous acid ester are dropped in reactor and is heated to 70 DEG C, stir 30min, add surplus stock, be warming up to 80 DEG C, stir 45min.
Mixed material is dropped in twin screw extruder and extrudes, barrel temperature 140 DEG C, 145 DEG C, 150 DEG C, 165 DEG C and 180 DEG C, machine head port mould temperature 180 DEG C, blow-up ratio 3, stretch ratio 4, screw speed 60r/min, pulling speed 8m/min.
Product tensile strength 20MPa, elongation at break 350%; Angle tear strength 110kN/m, natural solarization 8 months percent retention of elongations 89%; Transmittance 86%, tensile strength 3.5MPa; Shock resistance energy 1.42J.
embodiment 3:
LDPE100 part is taken according to parts by weight proportioning; Magnesium hydroxide 15 parts; 0.2 part, sulphur; Sodium aluminate 20 parts; Phosphorous acid ester 0.3 part; Urethane 2 parts; Antioxidant 1010 is 0.2 part; 10 parts, magnesium sulfate; Tetraethylthiuram disulfide 0.25 part; PU is 15 parts; UV light absorber UV-327 is 0.25 part; EVA is 15 parts; Zinic stearas 1 part; CPE10 part; LLDPE is 35 parts.
LDPE, magnesium hydroxide, sulphur, sodium aluminate and phosphorous acid ester are dropped in reactor and is heated to 55 DEG C, stir 15min, add surplus stock, be warming up to 65 DEG C, stir 30min.
Mixed material is dropped in twin screw extruder and extrudes, barrel temperature 140 DEG C, 145 DEG C, 150 DEG C, 165 DEG C and 180 DEG C, machine head port mould temperature 172 DEG C, blow-up ratio 2, stretch ratio 3, screw speed 20r/min, pulling speed 6m/min.
Product tensile strength 25MPa, elongation at break 350%; Angle tear strength 115kN/m, natural solarization 9 months percent retention of elongations 88%; Transmittance 87%, tensile strength 4MPa; Shock resistance energy 1.43J.
embodiment 4:
LDPE100 part is taken according to parts by weight proportioning; Magnesium hydroxide 25 parts; 0.4 part, sulphur; Sodium aluminate 30 parts; Phosphorous acid ester 0.7 part; Urethane 4 parts; Antioxidant 1010 is 0.4 part; 20 parts, magnesium sulfate; Tetraethylthiuram disulfide 0.45 part; PU is 25 parts; Ultraviolet absorbent UV-531 is 0.45 part; EVA is 25 parts; Zinic stearas 2 parts; CPE20 part; LLDPE is 45 parts.
LDPE, magnesium hydroxide, sulphur, sodium aluminate and phosphorous acid ester are dropped in reactor and is heated to 65 DEG C, stir 25min, add surplus stock, be warming up to 75 DEG C, stir 40min.
Mixed material is dropped in twin screw extruder and extrudes, barrel temperature 140 DEG C, 145 DEG C, 150 DEG C, 165 DEG C and 180 DEG C, machine head port mould temperature 178 DEG C, blow-up ratio 3, stretch ratio 4, screw speed 40r/min, pulling speed 8m/min.
Product tensile strength 30MPa, elongation at break 450%; Angle tear strength 120kN/m, natural solarization 10 months percent retention of elongations 89%; Transmittance 88%, tensile strength 4.5MPa; Shock resistance energy 1.44J.
embodiment 5:
LDPE100 part is taken according to parts by weight proportioning; Magnesium hydroxide 20 parts; 0.3 part, sulphur; Sodium aluminate 25 parts; Phosphorous acid ester 0.5 part; Urethane 3 parts; Antioxidant 1010 is 0.3 part; 15 parts, magnesium sulfate; Tetraethylthiuram disulfide 0.35 part; PU is 20 parts; Ultraviolet absorbent UV-531 is 0.35 part; EVA is 20 parts; Zinic stearas 1.5 parts; CPE15 part; LLDPE is 40 parts.
LDPE, magnesium hydroxide, sulphur, sodium aluminate and phosphorous acid ester are dropped in reactor and is heated to 60 DEG C, stir 20min, add surplus stock, be warming up to 70 DEG C, stir 35min.
Mixed material is dropped in twin screw extruder and extrudes, barrel temperature 140 DEG C, 145 DEG C, 150 DEG C, 165 DEG C and 180 DEG C, machine head port mould temperature 175 DEG C, blow-up ratio 3, stretch ratio 4, screw speed 40r/min, pulling speed 7m/min.
Product tensile strength 35MPa, elongation at break 550%; Angle tear strength 125kN/m, natural solarization 10 months percent retention of elongations 90%; Transmittance 89%, tensile strength 5MPa; Shock resistance energy 1.45J.
Composition all components in above embodiment all can business be bought.
Above-described embodiment is just for setting forth content of the present invention, instead of restriction, and any change therefore in the implication suitable with claims of the present invention and scope, all should think to be included in the scope of claims.
Claims (6)
1. an anti-aging plastic film used for vegetable greenhouse, is characterized in that the raw materials by weight portion proportioning of described anti-aging plastic film used for vegetable greenhouse is as follows: LDPE100 part; Magnesium hydroxide 10-30 part; Sulphur 0.1-0.5 part; Sodium aluminate 15-35 part; Phosphorous acid ester 0.2-0.8 part; Urethane 1-5 part; Oxidation inhibitor 0.1-0.5 part; Magnesium sulfate 5-25 part; Tetraethylthiuram disulfide 0.15-0.55 part; PU is 10-30 part; UV light absorber 0.15-0.55 part; EVA is 10-30 part; Zinic stearas 0.5-2.5 part; CPE5-25 part; LLDPE is 30-50 part.
2. one according to claim 1 anti-aging plastic film used for vegetable greenhouse, is characterized in that described anti-aging plastic film raw materials by weight portion proportioning used for vegetable greenhouse is as follows: LDPE100 part; Magnesium hydroxide 15-25 part; Sulphur 0.2-0.4 part; Sodium aluminate 20-30 part; Phosphorous acid ester 0.3-0.7 part; Urethane 2-4 part; Oxidation inhibitor 0.2-0.4 part; Magnesium sulfate 10-20 part; Tetraethylthiuram disulfide 0.25-0.45 part; PU is 15-25 part; UV light absorber 0.25-0.45 part; EVA is 15-25 part; Zinic stearas 1-2 part; CPE10-20 part; LLDPE is 35-45 part.
3. one according to claim 1 anti-aging plastic film used for vegetable greenhouse, is characterized in that the raw materials by weight portion proportioning of described anti-aging plastic film used for vegetable greenhouse is as follows: LDPE100 part; Magnesium hydroxide 20 parts; 0.3 part, sulphur; Sodium aluminate 25 parts; Phosphorous acid ester 0.5 part; Urethane 3 parts; 0.3 part, oxidation inhibitor; 15 parts, magnesium sulfate; Tetraethylthiuram disulfide 0.35 part; PU is 20 parts; UV light absorber 0.35 part; EVA is 20 parts; Zinic stearas 1.5 parts; CPE15 part; LLDPE is 40 parts.
4. one according to claim 1 anti-aging plastic film used for vegetable greenhouse, is characterized in that: described oxidation inhibitor adopts antioxidant 1010 or anti-oxidant DLTP.
5. one according to claim 1 anti-aging plastic film used for vegetable greenhouse, is characterized in that: described UV light absorber adopts UV-531 or UV-327.
6. a preparation method for anti-aging plastic film used for vegetable greenhouse described in claim 1, is characterized in that, comprise the steps:
The first step: take LDPE, magnesium hydroxide, sulphur, sodium aluminate, phosphorous acid ester, urethane, oxidation inhibitor, magnesium sulfate, tetraethylthiuram disulfide, PU, UV light absorber, EVA, Zinic stearas, CPE and LLDPE according to parts by weight proportioning;
Second step: LDPE, magnesium hydroxide, sulphur, sodium aluminate and phosphorous acid ester are dropped in reactor and is heated to 50-70 DEG C, stir 10-30min;
3rd step: add surplus stock, be warming up to 60-80 DEG C, stirs 25-45min;
4th step: mixed material is dropped in twin screw extruder and extrudes, barrel temperature 140 DEG C, 145 DEG C, 150 DEG C, 165 DEG C and 180 DEG C, machine head port mould temperature 170-180 DEG C, blow-up ratio 2-3, stretch ratio 3-4, screw speed 10-60r/min, pulling speed 6-8m/min.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105524330A (en) * | 2016-01-06 | 2016-04-27 | 湖南尚鑫新材料科技有限公司 | Anti-aging plastic film and preparation method thereof |
| CN105801977A (en) * | 2016-04-26 | 2016-07-27 | 界首市锦丰塑业有限公司 | Anti-aging plastic cloth |
| CN105968535A (en) * | 2016-07-05 | 2016-09-28 | 苏州科淼新材料有限公司 | PE agricultural film and preparation method thereof |
| CN106146982A (en) * | 2016-07-28 | 2016-11-23 | 陈林美 | A kind of environmental protection anti tear PE film formulation |
| CN107011570A (en) * | 2017-04-25 | 2017-08-04 | 柳州市乾阳机电设备有限公司 | Waterproofing membrane |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105524330A (en) * | 2016-01-06 | 2016-04-27 | 湖南尚鑫新材料科技有限公司 | Anti-aging plastic film and preparation method thereof |
| CN105801977A (en) * | 2016-04-26 | 2016-07-27 | 界首市锦丰塑业有限公司 | Anti-aging plastic cloth |
| CN105968535A (en) * | 2016-07-05 | 2016-09-28 | 苏州科淼新材料有限公司 | PE agricultural film and preparation method thereof |
| CN106146982A (en) * | 2016-07-28 | 2016-11-23 | 陈林美 | A kind of environmental protection anti tear PE film formulation |
| CN107011570A (en) * | 2017-04-25 | 2017-08-04 | 柳州市乾阳机电设备有限公司 | Waterproofing membrane |
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