KR100984329B1 - Functional film for agricultural with selective permeability of light - Google Patents

Abstract

The present invention uses the fluorescent dye for light conversion to increase the growth and yield of fruit by photosynthesis by light conversion of energy required for plants to grow, factor of inhibiting growth of plants by heat source using organic-inorganic near infrared absorption pigment The present invention relates to a functional agricultural film having a light selective transmittance, which is effective in increasing growth, fruit growth and yield when cultivating various kinds of crops, and using energy-saving functional films for high oil prices. By using it as a film that can reduce the energy consumption by heat in residential and living spaces such as apartments, cars, etc. where humans live, there is an advantage to reduce the energy.

Agricultural film, functional film, near-infrared absorption dye, fluorescent dye for light conversion

Description

Functional film for agricultural with selective permeability of light

The present invention relates to a functional agricultural film having a light-selective transmittance, and more particularly, by using a fluorescent dye for light conversion to convert the energy required for plants to grow light to activate photosynthesis to increase fruit growth and yield, The present invention relates to a functional agricultural film having light selective transmission, characterized by using an inorganic near-infrared absorbing pigment so that plants do not inhibit growth by a heat source.

In general, agricultural film has a general function such as light transmittance, invincibility, warmth or anti-fog property, so as to protect the crop from changes in the environment outside the plastic house and to produce a high-quality, high-income agricultural products.

Among the above characteristics, in order to promote photosynthesis of crops, light diffusion due to particles in the film inside of the film appears to be higher in transmission efficiency than ordinary films due to the light of visible light of sunlight, but the brightness of visible light substantially enhances photosynthesis. This is very important. There are many rays other than ultraviolet rays, visible rays, and infrared rays in the sun's rays, and some of these rays increase the growth of plants or increase the yield and yield of fruits. To receive a lot of plants, the fruit mathematics is reduced, there is a problem that the growth of the plant is also deteriorated, so the development of a film that selectively absorbs light is urgently required.

On the other hand, as a way to solve the problems described above, various studies have been attempted to improve the light-transmitting function for agricultural films and look at the contents of the patent application, Republic of Korea Patent Publication No. 2000-42841 and Republic of Korea Patent Publication No. 10 Agricultural films containing ultraviolet absorbers are known by -0458015, and in the case of the above patents, the UV absorbers effectively exhibit the effect of blocking near ultraviolet rays, thereby increasing the effect of suppressing pests and promoting crop yield and growth. Although there is an advantage that there is no deterioration of transparency even in long-term use, but the infrared region passes through the agricultural film, the plant grows by the heat wavelength, and there is a problem that the fruit mathematics quantity of the plant is reduced due to the heat stress, and the Republic of Korea Patent Application Bulletin 1996 Agricultural films containing infrared absorbers are known from -14286 and 2002-32386, and in the case of the above patents, although infrared absorbers are used in agricultural films, heat is absorbed by absorbing wavelengths in the near infrared region of 800 to 1,100 nm. Since there is a limit in absorbing wavelengths, there is a possibility that the growth promoting action of plants may be reduced by heat in the daytime when sunlight is sufficiently irradiated.

Therefore, the inventors of the present invention, since the infrared wavelength is a thermal wavelength, the plant grows under a lot of stress due to heat, and the fruit mathematical quantity of the plant is reduced, and in order to prevent the growth of the plant, an infrared absorber is used to selectively absorb light transmission, The present invention has been completed by converting and absorbing harmful light using a converting fluorescent material to strengthen the growth of plants or increase the growth and yield of fruits.

The present invention to improve the photosynthesis of plants by simultaneously using the infrared absorbing pigment and the light conversion fluorescent dye in the agricultural film to solve the problems as described above to promote the growth rate of the plant, selective light useful for the plant to grow It is an object of the present invention to provide a functional agricultural film having a light selective transmission, characterized in that it has a function to transmit and absorb to the plant to increase the growth and yield of fruit.

Conventional agricultural film has a function of preventing fog and blocking ultraviolet rays, and a part of using a windscreen of plants and a near infrared absorber, but absorbing wavelengths in the near infrared region of 800 to 1,100 nm, whereas there is a limit to absorbing thermal wavelengths. The present invention absorbs the near-infrared wavelength range of 750 nm to 1,200 nm to increase the heat absorption capacity of the plant compared to the conventional agricultural film by inhibiting the growth of the heat, and the light-converting fluorescent material has a UV range of 200-400 nm. It absorbs light strongly and absorbs the blue wavelength of 450nm-500nm in the visible region and converts the light in the wavelength range of 620nm ~ 650nm, which is the wavelength band to increase the photosynthesis of the sunlight with the red wavelength, thereby increasing the photosynthesis of the plant It is characterized by strong growth rate and increased fruit yield.

The present invention for achieving the above object in the agricultural film made of a synthetic resin substrate and additives,

A near-infrared absorbing pigment with respect to 100 parts by weight of a synthetic resin substrate, 0.5-1.0 parts by weight of light, the fluorescent pigment for light conversion, characterized in that it comprises a functional agricultural film having a light selective transmittance, the near infrared region having a wavelength of 750nm to 1,200nm. Transmittance is 40 ~ 60%, absorbs light in the UV region between 200-400nm strongly, and it is 620nm ~ 650nm region, which is a wavelength band that increases the photosynthesis of the UV region and the visible region in the blue wavelength range of 450nm-500nm in the visible region. The functional agricultural film which has light selective transmittance characterized by light switching is made into the solution means of a subject.

The present invention by the above problem solving means has the effect of increasing the growth and fruit growth and yield when growing various kinds of crops, and apartments in which humans live by using the functional film for energy saving in the high oil price era, It has the advantage of reducing energy by applying and developing it as a film that can reduce energy consumption by heat of residential and living spaces such as automobiles.

According to a feature of the present invention for achieving the above effect, the functional agricultural film according to the present invention by using a near-infrared absorbing dye and a light conversion fluorescent dye at the same time, to increase the photosynthetic action of the crop, and to promote the growth rate In addition, it selectively transmits and absorbs light, which is very useful for growing plants.

Hereinafter, the configuration of a functional agricultural film having light selective transmission according to the present invention will be described in detail.

In the agricultural film consisting of a synthetic resin substrate and additives,

It is related with 100-weight part of synthetic resin base materials, It is related with the functional agricultural film which has light selective transmittance characterized by including 0.5-1.0 weight part of near-infrared absorption pigments, and 0.01-0.2 weight part of fluorescent dyes for light conversion.

Synthetic resin substrate used in the present invention is a synthetic resin generally used for agricultural films, it is preferable to use one selected from the group consisting of polyethylene resin, polypropylene resin, ethylene vinyl acetate copolymer resin, polyvinyl chloride resin. .

In addition, the polyethylene film is classified into low density polyethylene (LDPE), high density polyethylene (HDPE) and linear low density polyethylene (LLDPE).

In the functional agricultural film according to the present invention, it is preferable that the near infrared film transmittance in the wavelength range of 750 nm to 1,200 nm is 40 to 60% using a near infrared absorbing dye. Near-infrared rays are heat rays that have a thermal effect, and when they are delivered inside the agricultural film as they are, the crops are stressed by heat, which hinders growth.

Therefore, in order to prevent 100% penetration of the near-infrared ray, which is a hot ray, a portion of the near-infrared ray must be absorbed into the film by using a near-infrared absorbing dye in the agricultural film. If the film transmittance of near infrared rays is less than 40%, near infrared rays are hardly transmitted inside the agricultural film, and in winter, crops may be damaged by cold, and if the film transmittance of near infrared rays exceeds 60%, the near infrared rays Due to the excessive permeation, the crops are stressed by heat, and there is a fear that the growth promotion is lowered.

In the present invention, the amount of the near infrared absorbing pigment is preferably 0.5 to 1.0 parts by weight of the near infrared absorbing pigment based on 100 parts by weight of the synthetic resin substrate. When the amount of the near infrared absorbing pigment is less than 0.5 parts by weight, the heat rays with heat action are transferred to the inside of the agricultural film as it is, and the crops are stressed by heat, which may interfere with the growth promotion, and the amount of the near infrared absorbing pigment is used. If the amount exceeds 1.0 parts by weight, the crops may be damaged in winter due to the lack of permeation of the near infrared rays transmitted into the agricultural film due to the excessive absorption of the near infrared rays from the agricultural film.

The near-infrared absorbing pigments usable in the present invention are phthalocyanine pigments, naphthoquinone pigments, naphthalocyanine pigments, pyrrole pigments, polymer condensed azo pigments, anthraquinone pigments, anthraquinone pigments, cyanines, and inorganic absorbers (antimony It is preferable to select at least 1 type from the group which consists of an oxide, a flow path complex, and a metal oxide type (rare earth type).

In addition, the functional agricultural film according to the present invention strongly absorbs light in the UV region between 200-400 nm using a fluorescent dye for light conversion, and 620 nm ~, which is visible light in the blue wavelength region of 450 nm-500 nm in the visible region. It is preferable to convert the light into the 650 nm region.

Therefore, by using fluorescent dye for light conversion in agricultural film, it strongly absorbs light in the UV region between 200-400nm among UV wavelength and visible light, and 620nm which is visible wavelength in the blue wavelength range of 450nm-500nm in the visible region. By converting light to the region of 650 nm, the photosynthesis of crops can be maximized. At this time, when the light conversion wavelength band is out of the above-defined range, there is a fear that the photosynthetic activity of the crop is reduced.

In the present invention, the amount of the fluorescent dye for light conversion is preferably 0.01 to 0.2 parts by weight of the fluorescent dye for light conversion based on 100 parts by weight of the synthetic resin substrate. When the amount of the fluorescent dye for light conversion is less than 0.01 part by weight, the visible light in the green wavelength band may not be sufficiently converted to the area of the red wavelength band, and the amount of the fluorescent dye for light conversion may exceed 0.2 parts by weight. In this case, the visible light in the green wavelength range is converted to and may be out of the wavelength range defined above.

Fluorescent dye for light conversion that can be used in the present invention is a fluorescent red pigment, it is preferable to select at least one from the group of europium compound, 1,10-phenanthrone, and perylene-based compound (perylene).

In addition, the functional agricultural film of the present invention is also used to prevent longevity of the agricultural film (weathering agent) and to block the ultraviolet ray (UV agent) is also used, such additives are commonly added to agricultural films As an additive, it is not a feature of the present invention.

In the present invention, the amount of the longevity agent and the UV stabilizer is preferably 0.2 to 0.7 parts by weight based on 100 parts by weight of the synthetic resin substrate. If the amount of the above additives is less than the range defined above, there is a concern that the prevention of aging of the film or the sunscreen effect may not be proper, and if the amount of the above additives exceeds the range defined above, There exists a possibility that the other functionality of a film may fall.

As described above, the functional agricultural film according to the present invention increases the photosynthetic action of crops, promotes the growth rate, and selectively transmits and absorbs light by using a near infrared absorbing dye and a light converting fluorescent dye at the same time. This film has the advantage of transmitting light which is very useful for growing, and it can reduce the energy consumption by heat of residential and living spaces such as apartments, automobiles, etc. by using it as the energy-saving functional film in the high oil price era. Application development has the advantage of reducing energy.

Hereinafter, the configuration of the present invention will be described in detail with reference to the following examples, but the configuration of the present invention is not necessarily limited only to the following examples.

1. Preparation of Functional Agricultural Film with Light Selective Transmittance

According to the composition ratio of Table 1 below, a functional agricultural film having light selective transmittance was prepared according to a conventional film production method.

(Unit: parts by weight) ingredient Example Comparative example One 2 3 4 One 2 3 LDPE Resin 100 100 100 100 100 100 100 NIR absorbing pigments ^{1 )} 0.5 One 0.5 0.5 0.5 0.1 - Photoconversion Pigment ^{2 )} 0.01 0.02 0.1 0.2 - - - LD colorless 0.2 0.4 0.5 0.7 0.5 0.5 0.5 Sunscreen 0.2 0.4 0.5 0.7 0.5 0.5 0.5

Note 1) Dithiol dyes (Uksung Chemical Co., Ltd., PANAX NIR-840)

   2) Europium compound (organic) pigment (Uksung Chemical, PANAX RED PKS-225)

2. Measurement of temperature change in the plastic house

Measurement data on the temperature change in the vinyl house from June 20 to August 14, 2007 using a functional agricultural film having a light selective transmittance prepared according to the content of [Table 1] is shown in [Table 2] Is the same as

division Example Comparative example One 2 3 4 One 2 3 Near-infrared cut off (%) ^{1 )} 40 60 40 40 15 40 0 Temperature
(℃) Best 49.3 48.9 49.0 49.2 52.2 49.3 55.8 lowest 14.8 14.6 14.6 15.0 15.5 15.2 16.2

Note 1) Using the spectrophotometer (Best-570, manufactured by Nippon Bunko KK), find the average value T of near-infrared absorptivity using the spectrophotometer (Best-570, manufactured by Nippon Bunko KK). ).

According to the contents of [Table 2], the internal temperature of Examples 1 to 4, which is a film using a near-infrared absorber and a light conversion fluorescent dye, was measured. It can be seen that there is no difference in the room temperature, whereas in Comparative Examples 1 and 2 using only the near-infrared absorber, the internal temperature was measured and the difference between the maximum temperature was 2.9 ° C and the minimum temperature was 0.3 ° C. You can see a lot of difference.

In the case of Comparative Example 3, which does not use the near-infrared absorber and the light-converting fluorescent dye at all, the maximum temperature is 55.8 ° C., which is higher than those of Examples 1 to 4 and Comparative Examples 1 and 2, and thus the crop may be stressed by heat. I could see that.

As a result of the measurement of the indoor temperature of the vinyl house, it was confirmed that the use of the near infrared dye and the light conversion dye at the same time has a high effect of lowering the temperature, and the near infrared dye content is not good in the temperature and the amount of sunshine compared to using only 0.5 parts by weight.

3. Measurement of roughness in the plastic house

Examples 1 to 4 and near-infrared absorbing pigments of the film to which the photosynthetic fluorescent dye and the near-infrared absorbing pigment are added to increase the photosynthesis using the functional agricultural film having light selective transmittance prepared according to the contents of Table 1 above are added. The roughness measurement result of the comparative examples 1 and 2 which are one film, and the comparative example 3 which is a general film is as follows. The measurement date is the result of illuminance measurement at 11 o'clock on August 15, 2007.

(Unit: Lux) division Example Comparative example One 2 3 4 One 2 3 Roughness 78,000 63,600 82,300 78,300 70,600 78,200 68,000

According to the contents of [Table 3], the fluorescent dye content for light conversion was measured as illuminance by adding 0.01 to 0.2 parts by weight as in Examples 1 to 4, and the illuminance was added when 0.1 parts by weight of the fluorescent dye for light conversion was added. It was confirmed to be the highest.

4. Fruit Growth and Yield of Melon

As a result of the melon cultivation using the agricultural film prepared according to the contents of [Table 1], the average overweight, average exaggeration and yield of the melon are as shown in the following [Table 4].

division Example Comparative example One 2 3 4 One 2 3 Overweight (g) 573.4 589.8 569.6 571.2 560.7 573.4 572.6 Exaggeration (cm) 14.0 14.7 14.8 14.6 14.2 14.5 14.1 Yield () 984 1,083 1,052 1,012 523 578 273

According to the contents of Table 4, in Examples 1 to 4 using the near-infrared absorbing dye and the fluorescent dye for light conversion, the overweight and the exaggeration were maintained at almost the same level as compared to the comparative examples 1 to 3. Could see much more.

As can be seen from Table 4, by differentiating the heat absorption of the near-infrared rays according to the amount of the near-infrared absorbing pigments, the overweight and exaggeration have almost the same quality level as the crops without using the near-infrared absorbing pigments. While maintaining, the fruit yields were much higher.

Particularly, in Examples 1 to 4, the overweight and exaggeration were almost similar to those of Comparative Examples 1 to 3 by converting visible light in the blue wavelength region of 450 nm to 500 nm in the visible region to the red wavelength in the 620 nm to 650 nm region, which is a wavelength band for increasing photosynthesis. It was estimated that fruit yields were much higher while maintaining equal quality levels.

And even though the spinach is a vegetable in winter, despite the temperature is not cultivated in the summer when the temperature is high, the results of cultivating spinach in the summer using the functional agricultural film according to the present invention was confirmed that the yield of spinach increased twice.

 Therefore, in the present invention, as confirmed by the above embodiment, when the near-infrared absorbing dye and the fluorescent dye for converting light are used at the same time, the vegetable grows in the summer because of the high light selective transmittance, and thus it is possible to cultivate vegetables in the summer, vegetables and fruits. Increasing the yield of, the FTA worries the farmers of a big wrestling, and when harvesting crops can be seen that the crop yield is more than doubled compared to the general film.

The present invention described above is not necessarily limited only to the above configuration, and various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention.

Claims (6)

In the agricultural film consisting of a synthetic resin substrate and additives, 0.5 to 1.0 parts by weight of near infrared absorbing pigments and 0.01 to 0.2 parts by weight of fluorescent dyes for light conversion, based on 100 parts by weight of the synthetic resin substrate, The near-infrared region transmittance of wavelength 750nm-1,200nm is 40 to 60%, The functional agricultural film which has light selective transmittance characterized by the above-mentioned. delete The method of claim 1, The functional agricultural film has a light selective transmissive functional agricultural film, characterized in that for converting the visible light in the blue wavelength range of 450nm-500nm of the visible region to 620nm ~ 650nm region of the red wavelength range. The method of claim 1, The synthetic resin substrate is selected from the group consisting of polyethylene resin, polypropylene resin, ethylene vinyl acetate copolymer resin, polyvinyl chloride resin, functional agricultural film having a light selective transmittance, characterized in that. The method of claim 1, The near-infrared absorbing pigment is a phthalocyanine pigment, a naphthoquinone pigment, a naphthalocyanine pigment, a pyrrole pigment, a polymer condensed azo pigment, an anthraquinone pigment, an anthraquinone pigment, a cyanine, or an inorganic absorbent. The functional agricultural film which has light selective transmissivity characterized by selecting the above. The method of claim 1, The fluorescent dye for the light conversion is a red pigment having a fluorescent, light selective transmissive, characterized in that at least one selected from the group of europium compounds, 1,10-phenanthrone, and perylene compounds (perylene) material (perylene) Having a functional agricultural film.