Polymer composition for film production greenhouses

 

(57) Abstract:

The invention relates to a new covering materials for greenhouses. The polymer composition comprises a thermoplastic and a phosphor in the following ratio, wt.%: thermoplastic 90 - 99,9, a mixture of phosphors else. As the phosphor, it contains a mixture of 5 to 30 wt.% phosphor with blue luminescence with a maximum in the spectrum of the radiation in the region of 425 - 490 nm and 70 to 95 wt. % phosphor with orange-red luminescence with a maximum in the spectrum of the radiation in the region of 590 - 665 nm. The specified polymer composition provides a balanced flow of the life cycle of plants depending on the plant species and stage of its development. 3 C.p. f-crystals.

The invention relates to a new covering materials for greenhouses.

Known fluorescent lamp low pressure, the share of crop production with phosphor, comprising 70-95 wt.% Y2O3: Eu, Tb with a red glow and 5-30 wt.% BaO2MgO8Al2O3: Eu+2with a blue glow. The lamp is intended for cultivation of plants with a long development cycle. The introduction of the phosphor 5-30 wt.% component with a blue glow provides a balanced flow of jiznennogo and application of fluorescent lamps for growing seedlings need to expend energy.

It is known that the regulation of growth and photosynthetic responses of many plants in the blue region of the spectrum of radiation light source (380-490 nm) should be 25-30% energy, 20% in green (490 - 590 nm), 50% in the red region of the spectrum (600-700 nm). Strong violation of this ratio, for example, when the prevalence of radiation in the blue region of the spectrum leads to the formation of stunted plants with high photosynthetic, but low productivity. With a strong predominance of radiation in the red region of the spectrum is the excessive growth of vegetative organs to the detriment of generative.

/N. N. Protasov. Spetacular as a way of identifying potential plant cultures.// Physiology of plants. 1987, 34 So. Vol. 4.With. 821/.

Known recommendations on the choice of sources of radiation used in crop production, in accordance with which in the spectrum of the radiation bands in the blue (400-500 nm), red (600-700 nm) and near-IR spectral region (700 to 750 nm). The presence of radiation in the region of 700 to 750 nm leads, in particular, to accelerate the transition of plants to the flowering phase.

/Proceedings of the international Congress on the cultivation of plants under controlled conditions. University Of Madison, Wisconsin. 27-30 March 1994/.

3)3The dryer where the dryer - 1,10-phenanthrolin, EuCl3TOFO, where TOPO - trioctylphosphine.

/The copyright certificate N 1381128 AI, CL C 09 K 5/07/.

However, in the emission spectrum of the film obtained from the known polymer compositions, there is no radiation in the blue region of the spectrum necessary to ensure a balanced flow of the life cycle of plants without excessive predominance of one of the processes. In addition, the phosphor included in the polymer composition has no emission band in the near IR region of the spectrum, it is necessary for stimulation of plant growth and accelerate the transition to flowering stage.

The aim of the invention is a polymer composition for film production greenhouses, comprising a phosphor with an emission spectrum, providing a balanced flow of the life cycle of plants depending on the plant species and stage of its development.

The essence of the invention lies in the fact that in the known polymeric compositions based on thermoplastic material in the polymer mass is injected a mixture of phosphors comprising 5-30 wt.% phosphor with a blue glow with mA is the minimum in the spectrum of the radiation in the region of 590-665 nm, from 0 to 15 wt.% phosphor emitting in the near IR region of the spectrum with a bandwidth of radiation in the region of 700-730 nm in the following ratio, wt.%:

The polymer of 90.0 to 99.9

A mixture of phosphors - Rest

As a phosphor with a blue glow in the polymer mass is injected barium aluminate, magnesium, activated by bivalent europium, and/or chlorophosphate strontium, barium, activated by bivalent europium, and/or orthoboric magnesium, activated titanium and tin, as a phosphor with a red glow in the polymer mass is injected crystalline oxysulfide yttrium, europium activated and/or oxysulfide lanthanum, europium activated with optimized radiation spectrum, as a phosphor having an emission band in the near IR region orthophosphate magnesium, strontium, activated by tin.

The polymer film obtained from the proposed polymer composition that effectively converts the UV portion of the solar radiation into radiation in the blue, red and infrared region of the spectrum and stimulates the growth of plants.

As thermoplastic material can be applied polyethylene, PVC and other thermoplastics, transparent in the UV and in the CLASS="ptx2">

/Fights The E. I. , A. Glagoleva A., Tripolina N. A. Phosphors based oxysulfides rare earth elements. M: NEIZVESTNY, 1992.

Hut C. S., Tananaev A. N., Golubev, I. F., Holubowski M. D. Obtaining the phosphor is strontium - magnesium orthophosphate activated by tin, the stoichiometric composition. //Proceedings of VNIIR. Stavropol, 1975. Vol. 12. S. 81.

Bender L. P., Tananaev A. N., Kerimbekova N. A. Phase composition of the base baristanet phosphors type LR-1.// Proceedings of VNIIR. Stavropol, 1972. Vol. 7. S. 66.

The UK Patent N 1452083.

Ratner, I. M., Rumyantsev, E. A., Eskova M. P., Butenko, N. Research methods for the synthesis of phosphate phosphors activated rare earth elements. //Proceedings of UNIIL, Stavropol, 1986. Vol. 31. S. 32/.

When the content in the polymeric composition is less than 0.1 wt.% phosphor efficacy of the polymer film obtained from the proposed polymer composition is significantly reduced. When the content in the polymeric composition is more than 10 wt.% phosphor excessively increases its value.

When the content in the mixture of phosphors less than 5 wt.% phosphor with the blue glow is excessive vegetatively is the inhibition of the processes of plant development, especially desirable at an early stage of development. Introduction to polymer composition of the phosphor having the emission band in the near IR region of the spectrum, leads to premature aging plants with a short life cycle. Introduction in a mixture of phosphors for more than 15 wt.% phosphor emitting in the near IR region of the spectrum leads to an excessively rapid transition of plants in the flowering cycle.

Phosphors based oxysulfides yttrium and lanthanum should be applied with the concentration of europium in which the intensity of illumination in the field LIGHTS would be maximum.

Example 1. The polymer composition obtained by mixing a mixture of phosphors, including a 12.5 wt.% the barium aluminate, magnesium, activated by bivalent europium (Bafor 0.9Eua 0.1Mg2Al16O27), the method of synthesis of which is described in UK patent N 1452083, CL C4S, and 87.5 wt.% oxysulfide yttrium, activated by trivalent europium (Y1,97Eu0,03O2S), the method of synthesis of which is described in U.S. patent N 3502590, CL 252-301.4, with granules of polyethylene according to GOST 16337-77 (at mass ratio of the number of pellets of polyethylene and a mixture of phosphors, equal to 98:2) in adenocarcinom oscillon the comfort by cutting hot wire harnesses at the time of exit from the lattice subject to the mixing head. Then from a polymer composition for a hose line LRP 63-1200 by extrusion of a sleeve with a blown bottom-up receive a tubular film of a thickness of 120 μm.

In the spectrum of luminescence of the film when excited by radiation in the ultraviolet region of the spectrum has a band with the maximum in the blue region of the spectrum (max= 450 nm), and band associated with the activator Eu+3in the red region of the spectrum. The obtained film is intended for cultivation of plants with a long development cycle.

Example 2. The polymer composition obtained by mixing a mixture of phosphors, including 30 wt.% the barium aluminate, magnesium, activated by bivalent europium (Ba1,9Eua 0.1Mg2Al16O27) and 70 wt.% oxysulfide yttrium, activated by trivalent europium. (Y1,895Eu0,015O2S) with pellets of high-pressure polyethylene (when the mass ratio of the number of pellets of polyethylene and a mixture of phosphors, equal to 98:2) according to the method described in example 1. Synthesis of phosphors described in the patents mentioned in example 1. Tubular film get on the methodology described in example 1.

In the spectrum of luminescence of the film upon excitation in the UV region of the spectrum has a band with maximumpacketsize for growing plants with short life cycles (for example, radish).

Example 3. The polymer composition obtained by mixing a mixture of phosphors, including a 12.5 wt.% the barium aluminate, magnesium, activated by bivalent europium (Bafor 0.9Eua 0.1Mg2Al16O27), to 72.5 wt.% oxysulfide yttrium, activated by trivalent europium, (Y1,97Eu0,03O2S) and 15 wt.% orthophosphate strontium, magnesium, activated by tin (Sr0,7Mg0,26Sn0,04)3(PO4)2method of synthesis of which is described in the author's certificate N 175821, class C 09 K with pellets of high-pressure polyethylene (when the mass ratio of the number of pellets of polyethylene and a mixture of phosphors, equal to 98:2) according to the method described in example 1. Tubular film was obtained by the method described in example 1.

In the spectrum of luminescence of the film when excited by radiation in the ultraviolet region of the spectrum has a maximum in the blue region of the spectrum (max= 450 nm), the band associated with the activator Eu+3(max= 626 nm) and an emission band in the region of 700 to 730 nm.

The film is intended to stimulate the development of plants with a long development cycle.

Example 4. The polymer composition obtained by mixing a mixture of phosphors, including>on 07(PO4)2Cl2), the method of synthesis of which is described in the work of Ratner I. M., Rumyantsev, E. A., Eskova M. P., Butenko, N. Research methods for the synthesis of phosphate phosphors activated rare earth elements. //Proceedings of UNIIL, Stavropol, 1986. Vol. 31.With.32 and 87.5 wt.% oxysulfide yttrium, activated by europium (Y1,97Eu0,03O2S) with pellets of high-pressure polyethylene (when the mass ratio of the number of pellets of polyethylene and a mixture of phosphors, equal to 98:2) according to the method described in example 1. Tubular film get the procedure described in example 1.

In the spectrum of luminescence of the film when excited by radiation in the ultraviolet region of the spectrum has a band with the maximum in the blue region of the spectrum (max= 447 nm), and band associated with the activator Eu+3in the orange-red region of the spectrum.

The film is intended for growing plants with a long development cycle.

Example 5. The polymer composition obtained by mixing a mixture of phosphors, including a 12.5 wt.% orthoborate magnesium, activated titanium and tin (Mg0,88Sna 0.1Ti0,02)3, (BO3)2synthesis method described in the author's certificate N ulama of high-pressure polyethylene (when the mass ratio of the number of pellets of polyethylene and a mixture of phosphors, equal to 98 : 2) according to the method described in example 1. Tubular film get on the methodology described in example 1.

In the spectrum of luminescence of the film when excited by radiation in the ultraviolet region of the spectrum has a band with the maximum in the blue region of the spectrum (max= 425 nm), and band associated with the activator Eu+3in the orange-red region of the spectrum.

The film is intended for cultivation of plants with a long development cycle.

Example 6. The polymer composition obtained by mixing a mixture of phosphors, including a 12.5 wt.% the barium aluminate, magnesium, activated by bivalent europium (Bafor 0.9Eua 0.1Mg2Al16O27) and 87.5 wt.% oxysulfide lanthanum, activated by europium trivalente (La1,97Eu0,03O2S), method of production described in U.S. patent N 3502590, CL 252-301.4, with granules of polyethylene (when the mass ratio of the number of pellets of polyethylene and a mixture of phosphors, equal to 98 : 2) according to the method described in example 1. Tubular film get the procedure described in example 1.

In the spectrum of luminescence of the film when excited by radiation in the ultraviolet region of the spectrum has a band with the maximum in the blue region is Ctra.

The film is intended for cultivation of plants with a long development cycle.

Example 7. The polymer composition obtained by mixing a mixture of phosphors, including a 12.5 wt.% the barium aluminate, magnesium, activated by bivalent europium (Bafor 0.9Eua 0.1Mg2Al16O27) and 87.5 wt.% oxysulfide yttrium, activated by trivalent europium (Y1,97Eu0,03O2S) with pellets of high-pressure polyethylene (when the mass ratio of the number of pellets of polyethylene and a mixture of phosphors, 90 : 10) by the method described in example 1. Tubular film get the procedure described in example 1.

In the spectrum of luminescence of the film when excited by UV region of the spectrum has a band with emission in the blue region of the spectrum (max= 450 nm), and band associated with the activator Eu+3in the orange-red region of the spectrum. The film is intended for cultivation of plants with a long development cycle.

Example 8. The polymer composition obtained by mixing a mixture of phosphors, including a 12.5 wt.% the barium aluminate, magnesium, activated by bivalent europium (Bafor 0.9Eua 0.1Mg2Al16O27) and 87.5 wt.% oxysulfide is a (at a mass ratio of the number of granules of polyvinyl chloride and a mixture of phosphors, equal to 98 : 2) in adenocarcinom oscillating homogenizer-mixer and receive a tubular film according to the method described in example 1. Synthesis of phosphors described in the patents mentioned in example 1.

In the spectrum of luminescence of the film when excited by radiation in the ultraviolet region of the spectrum has a band with the maximum in the blue region of the spectrum (max= 450 nm), and band associated with the activator Eu+3in the orange-red region of the spectrum. The obtained film is intended for cultivation of plants with a long development cycle.

Thus, when applying the proposed polymer composition get luminescense film with an optimal ratio of the radiation intensity in the blue, red and near infrared region of the spectrum depending on the plant species and stage of its development.

1. Polymer composition for film production greenhouses, including thermoplastic and the phosphor, characterized in that the phosphor contains a mixture of 5 to 30 wt.% phosphor with blue luminescence with a maximum in the spectrum of the radiation in the region of 425 - 490 nm and 70 to 95 wt.% phosphor with orange-red luminescence with a maximum in the spectrum of the radiation in the region of 590 - 665 nm in the following ratio kousaka fact, that the phosphor contains a mixture of phosphors, further comprising a phosphor with an emission band in the region of 700 to 730 nm in an amount of not more than 15 wt.% on 100 wt.% a mixture of phosphors.

3. The composition according to p. 1, characterized in that the phosphor with the blue glow it contains barium aluminate, magnesium, activated by bivalent europium, and/or chlorophosphate strontium, barium, activated by bivalent europium, and/or orthoboric magnesium, activated titanium and tin, as a phosphor with an orange-red glow - crystalline oxysulfide yttrium, europium activated with optimized emission spectrum and/or oxysulfide lanthanum, europium activated with optimized radiation spectrum.

4. The composition according to p. 2, characterized in that as a phosphor having an emission band in the region of 700 to 730 nm, it contains the orthophosphate magnesium, strontium, activated by tin.

 

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