CN1240105A - Optical conversion film for agriculture use - Google Patents
Optical conversion film for agriculture use Download PDFInfo
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- CN1240105A CN1240105A CN 98102711 CN98102711A CN1240105A CN 1240105 A CN1240105 A CN 1240105A CN 98102711 CN98102711 CN 98102711 CN 98102711 A CN98102711 A CN 98102711A CN 1240105 A CN1240105 A CN 1240105A
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- light conversion
- film
- additive
- stabilizing agent
- agriculture use
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- Protection Of Plants (AREA)
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Abstract
The present invention relates to a photoconverting film for agricultural use. It is made of polyethylene as base material more than two kinds of luminescent materials which are oxysulfides of La, Y, Eu and Ga as inorganic photoconverting additive and more than one of organic acids amine compounds as photoconverting stabilizer. Said invented photoconverting film can absorb 280-400 nanometers ultraviolet light in natural light, can convert above 90% of absorbed ultraviolet light into reddish orange light, and possesses high tensile strength and high optical conversion stability and long service life for 3-3.5 years.
Description
The present invention relates to a kind of agricultural film, particularly relate to and a kind of ultraviolet ray is had transformation, and the light conversion performance is stable and the agricultural film of long service life.
What be used in crops booth, protection rice shoot and greenhouse in a large number is conventional polyethylene and polychloroethylene film; cheap 2～4 times of these polymer film cladding materials than silicate glass; and can be at any time transform the structure of booth, adjustments of gas exchange and intensity of illumination according to the difference of crops kind.
The polymeric material that has occurred helping plant light conversion intensity since 1981～nineteen eighty-two, thereby this type of polymeric material mechanism of action is to have strengthened photosynthetic biophysics mechanism in chlorophyll is synthetic because plant has increased absorption red or orange coloured light, has produced CO in the air
2The additional increase of absorption has increased the synthetic of carbohydrate and has decomposited the speed of oxygen.The ratio of ultraviolet in sunshine is 3-6%, it is believed that, the ultraviolet ray of sunshine is of no use to green plants.The researcher has added a series of organic compounds such as n-heterocyclic ligand for the useless ultraviolet light of plant is converted to red one useful orange light in party thing film, carried out in the fixing and experiment in the greenhouse temporarily with the IR fluorescence lamp.Simultaneously, in observation for many years, found many shortcomings of above polymer light-converting material:
● light is short conversion time.
● to various crops poor repeatability, can not in tomato and carrot as production-increasing function to Chinese cabbage
Reproduce.
● organic light-converting material price height causes plastic sheeting for farm use cost height.
● organic light conversion polymeric material mechanical strength is low, resistance to weather is poor, causes plastic sheeting for farm use service life
Short.
● organic light-converting material additive has high toxicity and ecological risk.
A kind of agricultural film is disclosed as application for a patent for invention prospectus CN 1105040A, with yttrium (Y), lanthanum (La), gadolinium (Ga), europium (Eu) complex material as fluorescence additive, composition is the complex of lanthanide series metal and binary aliphatic carboxylic acid and n-heterocyclic ligand, shortcoming is that this fluorescence additive is that lanthanide series metal is sequestered in the organic coordination compound that forms in organic matter and the n-heterocyclic ligand, can decompose along with the increase of light application time, the polymeric material mechanical strength is low simultaneously, causes agricultural film light conversion performance poor stability and service time short.
Because the shortcoming of above agricultural film, the present invention has developed optical conversion film for agriculture use of new generation.This optical conversion film for agriculture use is made up of polyethylene, inorganic light conversion additive and light conversion stabilizing agent.Inorganic light conversion additive is the oxysulfide phosphor of two or more lanthanide series, and its chemical general formula is:
M
xY
2-xSO
2，
M represents in the formula: one or more arbitrary proportion combinations in lanthanum (La), europium (Eu), gadolinium (Gd), cerium (Ce), praseodymium (Pr), neodymium (Nd), samarium (Sm), terbium (Tb), dysprosium (Dy), holmium (Ho), the erbium (Er); Y is the chemical element yttrium; X represents: 0＜X＜2.
Light conversion stabilizing agent is the polymer of succinic acid and tetraamine.
Carry out the chemistry or the physical adsorption of light conversion stabilizing agent on inorganic light conversion additive particles surface among the present invention, between therefore inorganic light conversion additive and the light conversion stabilizing agent chemical reaction does not take place.So do not generate as among the application for a patent for invention prospectus CN 1105040A and lanthanide series metal organic coordination compound and chelate in other similar application for a patent for invention prospectus or the patent.
Inorganic light conversion additive in the optical conversion film for agriculture use of the present invention evenly distributes in polyethylene film, and the ultraviolet ray in the sunshine is converted to the useful blood orange light of green plants (vegetables, fruit, flowers and plants, grafting and sapling etc.) growth.
The characteristic of this novel optical conversion film for agriculture use is:
● can absorb the ultraviolet light of 280～400 nanometers in the natural daylight, and the ultraviolet light that absorbs is changeed more than 90%
Be changed to blood orange coloured light.
● under it covers, can stablize and improve crop yield 15～30%.
● harmless to ecology, climatic adaptation is stable.
● " agricultural is thin with blow moulded polyethyene for optical conversion film for agriculture use mechanical tensile strength and GB GB 4455-94
Film " in high-class product agricultural film mechanical tensile strength 14MPa compare, brought up to 20～25MPa;
And with GB GB 4455-94 in high-class product agricultural film vertical, horizontal elongation at break 300%,
350% compares, and the vertical, horizontal elongation at break has all brought up to 600%, makes optical conversion film for agriculture use
ILS.
Purpose of the present invention and essence are that the light conversion performance of optical conversion film for agriculture use and physical mechanical characteristic are stable along with the application time increases.In polyethylene, add the additive of the inorganic light conversion of powdery as far as possible uniformly for this purpose, carry out the chemistry or the physical adsorption of light conversion stabilizing agent on inorganic light conversion additive particles surface.For the fusion of polymer oar with reach good flowability and use distribution device and stirred, the component of adding is evenly distributed in the polyethylene.Light conversion stabilizing agent and inorganic light are changed additive particles part abutment surface physical adsorption and are faintly combined like this, be dissolved in the molten polyethylene: and the light of another chemisorbed portion conversion stabilizing agent is stayed the surface of inorganic light conversion additive particles, significantly increased add component uniformly dispersed in optical conversion film for agriculture use.
The inorganic light conversion additive, light conversion stabilizing agent and the poly ratio that add in the optical conversion film for agriculture use are as follows:
Inorganic light conversion additive 0.05～0.5%
Light conversion stabilizing agent 0.1～1%
Polyethylene is below 100%
Embodiment 1
Preparation concentrates master batch on Special Equipment, carries out inorganic light conversion additive, light conversion stabilizing agent and poly mechanical mixture earlier, is made up of 2 screw(-type) feeders and basic melter.Polyethylene polyethylene from high pressure process, batcher are used for inorganic light conversion additive, and another is used for light conversion stabilizing agent, along with the motion of fusion slurry is carried out 3 kinds of even batch mixings of component and made concentrating agents.The inorganic light conversion additive that adds, light conversion stabilizer concentration ratio improve 50～100 times than the inorganic light conversion additive 0.05～0.5%, the light conversion stabilizing agent 0.1～1% that add in the above-mentioned optical conversion film for agriculture use respectively.
The concentrating agents that obtains becomes standard-sized concentrated master batch through granulation, (concentrates master batch: the polyethylene grain) after abundant the mixing, use traditional production agricultural polyethylene film technology to prepare optical conversion film for agriculture use again in the dry mixed device according to 1: 45～1: 55 then.Embodiment 2
Use " wet method " mixed inorganic light conversion additive and light conversion stabilizing agent to obtain equal homogenate in advance.Light is changed the 5-10% that consists of of stabilizing agent, and the mixture continuous stirring that obtains is heated to 90～100 ℃, cooling.Enter blender with 0.1 kilogram/minute speed by seam formula (slot) batcher then, the polyethylene of fusion simultaneously is with 1.5～2 kilograms/minute speed, and the rotating speed of helical axis is 40～80 times/minute.The mixed slurry that obtains carries out granulation, obtains intermediate products-concentrated master batch, and additive level is below 5%.
Last process is (to concentrate master batch: the polyethylene grain) in the fusion of dry mixed device according to 1: 45～1: 55, ribbon mixer by a heating, with the temperature injection mo(u)lding of 0.8～1 kilogram/minute speed and 210 ℃, membrane, pipeline thermal air pressure 0.8～1% atmospheric pressure.
The weight ratio of components of inorganic light conversion additive and light conversion stabilizing agent is 0.5: 1～2: 1 in the arbitrary volume optical conversion film for agriculture use that makes through the present invention, to guarantee wearability that optical conversion film for agriculture use is good and high mechanical strength, be 3～3.5 years service life.
Product of the present invention now is used widely.Statistics shows: do not contain inorganic light conversion additive with tradition and compare with the agricultural film of light conversion stabilizing agent, production scale is that the price of 1 ton of/year optical conversion film for agriculture use only improves 25～28%, and production scale is that the price of 50 tons of/year optical conversion film for agriculture use only improves 12～15%.
This optical conversion film for agriculture use is ecological safety, nontoxic, non-explosive, not flammable aborning.
Claims (5)
1. optical conversion film for agriculture use, with polyethylene is the film base-material, utilize two or more lanthanide series, as: the inorganic sulfur oxide luminescent material of lanthanum (La), yttrium (Y), europium (Eu), gadolinium (Ga) etc. is as inorganic light conversion additive, and its chemical general formula is: M
xY
2-xSO
2M in the formula: one or more arbitrary proportion combinations of lanthanum (La), europium (Eu), gadolinium (Ga), cerium (Ce), praseodymium (Pr), neodymium (Nd), samarium (Sm), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er).Y is the chemical element yttrium.X represents: 0＜X＜2.
2. the light conversion stabilizing agent of the utilization of the optical conversion film for agriculture use among the present invention is the polymer of succinic acid and tetraamine.
3. the optical conversion film for agriculture use among the present invention is made up of inorganic light conversion additive in polyethylene, claims 1 and the light conversion stabilizing agent in claims 2, and the adding proportion of three kinds of materials is: polyethylene is inorganic light conversion additive 0.05～0.5% light conversion stabilizing agent 0.1～1% below 100%
4. the phase I concentrates master batch for preparation in the optical conversion film for agriculture use production process, concentrates master batch and is made up of inorganic light conversion additive in polyethylene, claims 1 and the light conversion stabilizing agent in claims 2.Wherein press the inorganic light conversion additive that claims 1 add and press light that claims 2 add that to change in concentration ratio claims 3 of stabilizing agent these two kinds of material concentrations high 50～100 times.
5. the characteristics of the optical conversion film for agriculture use among the present invention are the inorganic light conversion additives that add by claims 1 and are 0.5: 1～2: 1 by the weight ratio of components of light conversion stabilizing agent in the arbitrary volume optical conversion film for agriculture use that claims 2 add, guarantee this optical conversion film for agriculture use tensile strength height, keep light conversion stability and the service life in 3～3.5 years.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98102711 CN1240105A (en) | 1998-06-23 | 1998-06-23 | Optical conversion film for agriculture use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98102711 CN1240105A (en) | 1998-06-23 | 1998-06-23 | Optical conversion film for agriculture use |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1240105A true CN1240105A (en) | 2000-01-05 |
Family
ID=5217521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98102711 Pending CN1240105A (en) | 1998-06-23 | 1998-06-23 | Optical conversion film for agriculture use |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1240105A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1887942B (en) * | 2005-06-29 | 2010-10-06 | 上海师范大学 | Weather resistant light-converting luminous farm film and its making process |
-
1998
- 1998-06-23 CN CN 98102711 patent/CN1240105A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1887942B (en) * | 2005-06-29 | 2010-10-06 | 上海师范大学 | Weather resistant light-converting luminous farm film and its making process |
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