KR101378577B1 - Liqiud film-forming compositions for mulching vinyl and manufacturing method thereof - Google Patents

Abstract

The present invention provides a liquid film forming composition for mulching vinyl and a method for producing the same, and an object thereof is to provide a liquid film forming composition for mulching vinyl having a biodegradability, warmth, and plant growth control function.
The present invention is 8-15 wt% of wood nitrogen, 7-15 wt% of humic acid, 25-43 wt% of water, 2-7 wt% of surfactant, 8-15 wt% of stabilizer, film -former) 3 ~ 8wt%, soil water protection agent 8 ~ 13wt%, collagen 10 ~ 15wt%, powder activated carbon 8 ~ 12wt% to form a liquid film forming composition for mulching vinyl Then, water is added to the film forming composition, and the film forming composition is diluted about 3 to 8 times, and then sprayed onto the soil surface.

Description

Liquid film-forming compositions for mulching vinyl and manufacturing method

The present invention provides a liquid film forming composition for mulching vinyl and a method for producing the same, and relates to a liquid film forming composition for mulching vinyl having a mulching function and biodegradation by spraying on soil.

Although transparent vinyl or black vinyl has been mainly used as an agricultural mulching material, the use of such a vinyl mulching membrane causes serious environmental pollution. Vinyl mulching membranes are hydrocarbon polymers made of polyethylene mixed with antioxidants and anti-UV modifiers.They have high molecular weight and stable characteristics, making them difficult to decompose under natural conditions. 400 years.

Currently, very thin mulching films (0.003 to 0.006 mm) of less than 0.012 mm are used. These mulching membranes have low strength, are easy to tear to smaller sizes, and cannot be recovered and recycled. If they are left or lost in nature and incorporated into the soil, they will cause serious environmental pollution to the soil and the environment for many years.

In addition, conventional vinyl mulching membranes need to be removed by hand after use, require labor and at the same time difficult to remove completely, and in the case of residual mulching vinyl, which is not properly collected, the soil growth and soil drainage of the cultivated crop are worsened. It is polluting the soil and leaving the waste plastics, the soil in rural areas is becoming more and more devastated.

In addition, the economic environment of productivity improvement over the last few decades has left the agricultural environment vulnerable to the abuse of chemicals. Moreover, the use of highly toxic pesticides and herbicides pollutes the soil, causing the destruction of natural ecosystems. In addition, the indiscriminate use of chemical fertilizers is causing problems such as acidification of soil, lowering of intelligence and water pollution, and further, consumer's distrust in the safety of agricultural products.

In addition, the vinyl mulching membrane is poorly breathable and permeable, and when it remains in the soil, it destroys the monolithic structure in the soil, hinders the penetration of capillary water and natural water, and affects the moisture absorption of the soil, impairing water movement. To slow down the flow of moisture. In addition, the gap between the soil is bad, the path of the roots are blocked, and the growth is prevented, and the air permeability is lowered, which makes the air circulation and exchange worse. It results in local excess or under water, leading to excessively high carbon dioxide content in the soil. Thus, it affects the activity of soil microorganisms and the formation of the normal structure of the soil, which also lowers the fertility of the soil and eventually leads to the reduction of crops. Residual mulching membranes adversely affect the physical properties of the soil, causing the crops to grow short and steadily, and reducing the performance of water and fertilizers, leading to subtraction of crops. In addition, it is scattered everywhere by the wind from the cultivated land, and hangs on crops, tree branches around the cultivated land, and buildings, and floats on waterways, rivers, and lakes, thereby damaging the natural scenery. Submersion in water affects the quality and quantity of irrigation and water supply, and can lead to contamination, which can have a significant impact on aquatic ecosystems. Residual flakes, if mixed with crop stalks or fodder, may damage the gastrointestinal function of livestock, adversely affect fattening and, in severe cases, death. Incineration of residual mulching membranes generates harmful gases such as dioxins, which pollute the atmosphere and cause secondary pollution. In addition, the plasticizer (o-Phthalaldehyde: OPA compound) in the mulching membrane component is low water-soluble and high fat-soluble, and has a significant bioaccumulation, which causes harm to the human body through soil, crops, and livestock. It is called white pollution.

Degradable mulching membranes have been developed and used as one of the methods to solve the above white silver pollution, and biodegradable mulching membranes are biodegradable vinyl mulching membranes mixed with biodegradable natural products such as starch in polyethylene, starch in water-soluble resins, etc. Solid mulching membranes made from a mixture of biodegradable natural products, fiber or paper mulching membranes.

However, the conventional mulching film is processed in the form of a film or sheet in most cases, it requires a separate process for laying, maintaining and dismantling it is disadvantageous in terms of economics, even in the case of containing a functional material due to poor adhesion to soil. There is a problem that the effect of the functional material is insignificant, difficult to adhere to the soil surface and is lost by strong winds and heavy rain.

In addition, the development of a liquid mulching agent has been made as an alternative to solve this problem, the liquid mulching agent is to form a mulching film on the soil surface by spraying a polymer resin emulsion. For example, Japanese Patent Laid-Open No. 2001-45879 discloses a liquid mulching method characterized by spraying a resin emulsion in which plant fibers are dispersed, and Japanese Patent Laid-Open No. 2001-145428 discloses a biodegradable polymer, a carbon-based material, and a colloidal solution. Liquid mulching agents containing silica are known.

However, the mulching membrane formed by the conventional liquid mulching agent is not good adhesion to the soil, the water resistance is low, the mulching membrane is easily lost by moisture, or when the water resistance of the film is high, the moisture permeability of the soil, such as rotting the roots of the crop to control the moisture of the soil, etc. There has been a problem with functionality. In addition, even in the method of manufacturing a liquid mulching agent, since other substances are mixed in the resin emulsion, it is difficult to uniformly mix the mixed constituents, and there is a problem that the uniformity of the mulching membrane formed may be lowered because it is sprayed onto the soil in such a state. .

Japanese Laid-Open Patent Publication No. 2000-0004687 (2000.01.11.) Japanese Laid-Open Patent Publication No. 2001-0045879 (2001.02.20.) Registered Patent Publication No. 10-1031365 (2011.04.19.) Japanese Laid-Open Patent Publication No. 2001-145428 (2001.05.29.)

It is an object of the present invention to provide a liquid film forming composition for mulching vinyl liquid having biodegradability, warmth, and plant growth control function and a method of manufacturing the same.

The present invention is 8-15 wt% of wood nitrogen, 7-15 wt% of humic acid, 25-43 wt% of water, 2-7 wt% of surfactant, 8-15 wt% of stabilizer, film -former) 3 ~ 8wt%, soil water protection agent 8 ~ 13wt%, collagen 10 ~ 15wt%, powder activated carbon 8 ~ 12wt% to form a liquid film forming composition for mulching vinyl Then, water is added to the film forming composition, and the film forming composition is diluted about 3 to 8 times, and then sprayed onto the soil surface.

The present invention is to include the natural fiber, collagen protein and humic acid, biodegradation is possible after a predetermined time, the soil moisture control is possible by the soil water protection agent is effective to achieve the water supply necessary for the growth of plants have.

In addition, the present invention is to mix the natural fiber, the collagen protein and the film forming agent, and to be sprayed, it is possible to improve the firmness of the resulting mulching film.

In addition, the present invention forms a water layer in the gel state when the soil water protection agent absorbs moisture, thereby protecting the roots of crops by breaking the capillary phenomenon such as the salinity rises from the basement or moves horizontally.

In addition, the present invention uses humic acid obtained from a high concentration of biological waste and is environmentally friendly as it is biodegradable, and the mulching membrane formed according to the present invention has improved soil adsorption capacity of the mulching membrane, and has moisture retention and moisture permeability suitable for crop growth. It also has the effect of promoting the growth of crops.

In addition, the mulching method using the film-forming composition according to the present invention is easier to install than the conventional vinyl mulching film because it is prepared by spraying the composition for mulching in the aqueous dispersion state, is hardly affected by the unevenness of the terrain, easy to install on the slope. It is not necessary to recover the remaining mulching film, and labor cost is saved. In addition, fertilizer application, insecticides, fungicides and herbicides can be applied together, which is economically advantageous.

In addition, the present invention is made to be biodegradable, there is no inconvenience to be removed after use, the pollution due to waste vinyl is prevented in advance, the strength and compactness is improved and the soil adhesion is improved to be lost in strong wind or heavy rain There are many effects.

1 is an exemplary block diagram showing a manufacturing method according to the present invention

The present invention is 8-15wt% lignin, 7-15wt% humic acid, 25-43wt% water, 2-7wt% surfactant, 8-15wt% stabilizer, film formation 3 to 8 wt% of film-former, 8 to 13 wt% of soil water protection agent, 10 to 15 wt% of collagen, and 8 to 12 wt% of powder activated carbon.

The wood nitrogen is activated by an increase in temperature, and has an adhesive function, thereby increasing the firmness of the mulching membrane, and adding to the mulching membrane to give a degradable function, such as stems, stems, leaves, etc. of crops. It is contained in a large amount.

That is, the present invention improves the cross-linking performance and soil adhesion of the mulching membrane by the addition of wood nitrogen, and can have a very excellent plant growth effect by having appropriate moisture permeability.

When the wood nitrogen is less than 8wt%, not only the effect of improving the crosslinking performance and soil adhesion of the mulching membrane is small, but also the biodegradability is lowered, and when the content is more than 15% by weight, the durability of the mulching membrane is lowered. .

In addition, the wood nitrogen can be replaced by adding waste crops. When the waste crops are added in this way, natural fiber is added in addition to the wood nitrogen, thereby further improving the firmness of the mulching membrane. However, the addition of such waste crops may cause a phenomenon that the content of wood nitrogen is less than that, it is preferable to add more than 10 to 20wt% than the amount of wood nitrogen added 8-15wt%. In the present invention, wood nitrogen and crops can be added together.

The humic acid typically refers to residues in which plants have been corroded for a long time in the ground. The humic acid may be a commercially available product or may be manufactured and used directly. Such a method of producing humic acid may be formed by fermentation and drying of brewing waste, seaweed waste, molasses waste, and other high concentration organic wastes using a conventional composting method.

When the humic acid is less than 7wt%, the effect on the water content of the mulching film, soil adsorption power and the film formation of the mulching film is insignificant, and when the content is more than 15wt%, the dispersibility and workability of the mulching composition is weakened.

The surface active agent is intended to have a uniform liquid phase, when added in less than 2wt%, difficult to use as a liquid phase, when added in excess of 7wt%, changes in the content of the other components, it is appropriate Add within the range. Such surfactants are known ones that are commercially available.

The stabilizer is to maintain the quality of each component by minimizing deformation when heated, phosphoric acid, monomethyl phosphate, triphenyl phosphate, trimethyl phosphate, tributyl phosphate, trioctyl phosphate, monophenyl phosphate , Triphenylphosphoric acid and derivatives thereof, or phosphorus (P) -based stabilizers, phosphorous acid, triphenylphosphoric acid, trimethylphosphoric acid and derivatives thereof and the like. When the stabilizer is added in less than 8wt%, there is a problem that the properties of each component is changed when mixing and heating the other components, when added in excess of 15wt%, the content of the other components is affected Not only does this affect the overall response, but it also adversely affects the overall response.

The film-former is used to impart a film-forming function, and a water-soluble polymer is used.

The water-soluble polymer may be an acrylic emulsion resin, a vinyl acetate resin, a polyurethane emulsion resin, polyvinyl alcohol or a mixture of one or more thereof, preferably polyvinyl alcohol.

Since the polyvinyl alcohol has adhesiveness, elasticity, flexibility and solubility, not only makes it easy to form a film, but also, the polyvinyl alcohol resin has a hot water resistance, and also has a function of preventing deformation of a molding by hot water. It is equipped with the propellant function, biodegradability, and microorganism degradability of the unit bridge.

When the film forming agent is added in less than 3wt%, miscibility and film forming functionality is lowered, and when added in excess of 8wt%, workability is lowered.

The soil water protection agent is a water-absorbent resin (water absorbent polymer) as a main component and the inorganic nutrients, growth promoters and electrolyte materials are mixed in the form of particles, it is attached to the mulching film by wood nitrogen and film-forming agent It is fixed.

The soil water protection agent can be retained by absorbing moisture of 10 to 100 times its own weight when it is converted into a gel state when absorbing moisture in the particulate state, and returns to the original grain state when the moisture is lost. Propeneamide propenoatecopolymer, crosslinked polyacrylamide, polyacrylonitrile polymer, crosslinked sulfonated polystyrenes, alginate alginate) using a selected one of the hydrogels.

Soil water protective agent having such a property, even when absorbing the moisture in the formation of the mulching film, does not cause cracks in the mulching film to absorb the moisture.

In addition, the mulching film made of the composition of the present invention is made of a natural material or biodegradable material, but after the formation of the mulching film, a certain time elapses after the natural decomposition, the soil water protection agent remains in its original installation position, and Soil water protection agents that remain together will continue to have a water supply function that is important for plant growth.

In addition, the mulching membrane made of the composition according to the present invention, when absorbing moisture by the soil water protection agent to form a water layer (moisture wall) in the gel state to protect the roots, and when the root absorbs moisture during drying, the soil moisturizer shrinkage Due to the change in the state of the small granules to form a gap between the soil moisturizer to improve the water permeability of the soil has the function to effectively wash the salt around the roots during rainfall or watering.

When the soil protection agent is added to less than 8wt%, when mixing and heating the other components, there is a problem that the properties of each component is changed, when added in excess of 13wt%, the content of the other components Not only does this affect the overall response, but it also adversely affects the overall response.

The collagen protein forms a firm film formation by mixing with a film forming agent, and the film formation thus formed has biodegradability. That is, the collagen protein can achieve a high viscosity increase by mixing with other constituents to form a film according to fiberization, and in particular, can increase the fiberization by mixing with a film forming agent, An increase in stability and physical properties is achieved.

When the collagen protein is added in less than 10wt%, it is difficult to form a firm film formation, and when it is added in excess of 15wt%, the viscosity is increased to make it difficult to spray liquid, it should be added within an appropriate range.

The powdered activated carbon is for suppressing weed generation by the light blocking effect by the mulching membrane, and absorbing sunlight to raise or control the geothermal heat. Activated carbon, carbon black, graphite, or a mixture thereof may be used. In view of the above, it is more preferable to use active carbon, Carbon Black or a mixture thereof.

When the powdered activated carbon is less than 8wt%, the light blocking effect and the geothermal heat insulating effect are insignificant, and when the content is more than 12wt%, it is not preferable because it may inhibit the film formation and water dispersibility of the film forming composition.

Hereinafter, the manufacturing method of the present invention will be described with reference to the accompanying drawings.

Figure 1 shows a block diagram showing a manufacturing method according to the present invention, the present invention is added to 25 to 43wt% of water to 8-15wt% of lignin in the first mixture by heating and stirring for 40-50 minutes First stirring step to form a;

After adding 7-15 wt% of humic acid, 8-13 wt% of soil water protection agent, 10-15 wt% of collagen and 8-12 wt% of powder activated carbon, A secondary stirring step of forming a secondary mixture by heating and stirring at a temperature of 85 to 100 ° C. for 20 to 40 minutes;

Adding a film-former 3 to 8 wt% to the secondary mixture, followed by heating and stirring for 15 to 25 minutes to form a tertiary mixture;

Lower the temperature of the tertiary mixture to 70 to 85 ° C., and then add 2 to 7 wt% of a surfactant and 8 to 15 wt% of a stabilizer to heat and stir for 12 to 18 minutes to form a fourth mixture. Second stirring step;

After the temperature of the fourth mixture is lowered to less than 40 ℃, it is to include a cooling step for natural cooling.

The manufacturing method of the present invention as described above is to improve the stability and uniformity of the film-forming composition through the steps of the first stirring, the second stirring, the third stirring and the fourth stirring, between the components by each step. Uniform mixing and reaction are carried out, and the physical properties of the film-forming composition are increased by such mixing and reaction. In particular, the temperature of the second stirring step (85 ~ 100 ℃) and the temperature of the fourth stirring step (70 ~ 85 ℃) through the function of stabilizing the cross-linking of collagen fibers through the adjustment of the temperature and to harden With functions.

The film-forming composition of the present invention prepared as described above is diluted about 3 to 8 times with water and sprayed onto the soil surface. That is, after diluting by adding 300 parts by weight to 800 parts by weight of water to 100 parts by weight of the film forming composition according to the present invention, it is sprayed onto the soil surface by a sprayer or the like to form a mulching film.

Hereinafter, the present invention will be described in detail by way of examples.

Example 1

Water was added to lignin and stirred for about 45 minutes to form a first mixture,

After adding humic acid, soil protectant, collagen and powder activated carbon, the mixture was heated and stirred at a temperature of about 90 ° C. for 30 minutes to form a secondary mixture solution.

A film-former was added to the secondary mixture, followed by heating and stirring for about 20 minutes to form a tertiary mixture.

After the temperature of the tertiary mixture was lowered to about 80 ° C., a fourth mixture was formed by heating and stirring for 15 minutes by adding a surfactant and a stabilizer,

After the temperature of the fourth mixture was lowered to less than 35 ° C, the mixture was naturally cooled to produce a liquid film forming composition for mulching. At this time, the unit of each component is g.

[Table 1]

Example 2

After adding and diluting 600 parts by weight of water to 100 parts by weight of the film forming composition for mulching liquid formed in Example 1, and spraying it on the area of 10 m × 10 m of soil with a sprayer, the presence or absence of the formation of a mulching film over 1 hour It was confirmed that the results are shown in [Table 2]. At this time, the formation of the mulching film was measured whether the film according to the touch, 3 is the perfect formation of the film formation, 2 is good formation of the film formation (having a mulching film function), 1 is incomplete formation (defect) of the film formation Indicates.

[Table 2]

As shown in the above [Table 2], No. 1 to No. 3 after the spraying, the mulching film is formed within about 30 minutes, it can be seen that after about 1 hour has a complete mulching film.

Example 3

For the mulching film according to No. 2 of Example 2, the degradability was measured through the remaining after 5 months, and as a result, it was confirmed that more than 80 to 90% of the resulting mulching film was removed.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

Claims (8)

Lignin 8-15wt%
Humic acid 7-15 wt%
25 to 43wt% of water
Surfactant 2-7 wt%
Stabilizer 8-15wt%
3-8 wt% film-former
8 ~ 13wt% soil water protection agent
10-15 wt% of collagen
Film-forming composition for liquid mulching vinyl, characterized in that containing 8 to 12wt% powder activated carbon.
The method of claim 1,
The film-former is a liquid film forming composition for mulching vinyl, characterized in that the water-soluble polymer.
The method of claim 2,
The water-soluble polymer is a liquid film for mulching vinyl film, characterized in that the polyvinyl alcohol.
The method of claim 1,
The soil protection agent is propenamide propenoatecopolymer, crosslinked polyacrylamide, polyacrylonitrile polymer, crosslinked sulfonated polystyrene, alginate (Alginate) A liquid film forming composition for mulching vinyl, characterized in that the selected one of the hydrogel.
The method of claim 4,
The soil water protection agent has a characteristic of absorbing moisture in the state of particles, and converting it into a gel state, absorbing and retaining moisture of 10 to 100 times its own weight, and returning to the original state of particles when water is lost. A film forming composition for liquid mulching vinyl, characterized in that.
The method of claim 1,
The powdered activated carbon is a liquid film forming composition for mulching vinyl, characterized in that used by selecting one of the activated carbon, carbon black, graphite or a mixture thereof.
The liquid film forming composition for mulching vinyl according to any one of claims 1 to 6 is added to 300 parts by weight to 800 parts by weight of water with respect to 100 parts by weight, and then diluted, and then sprayed for liquid mulching vinyl. Tabernacle composition.
A first stirring step of forming a first mixture by heating and stirring for 25 to 43 wt% of water to 8 to 15 wt% of lignin;
After adding 7-15 wt% of humic acid, 8-13 wt% of soil water protection agent, 10-15 wt% of collagen and 8-12 wt% of powder activated carbon, A secondary stirring step of forming a secondary mixture by heating and stirring at a temperature of 85 to 100 ° C. for 20 to 40 minutes;
Adding a film-former 3 to 8 wt% to the secondary mixture, followed by heating and stirring for 15 to 25 minutes to form a tertiary mixture;
Lower the temperature of the tertiary mixture to 70 to 85 ° C., and then add 2 to 7 wt% of a surfactant and 8 to 15 wt% of a stabilizer to heat and stir for 12 to 18 minutes to form a fourth mixture. Second stirring step;
Method for producing a liquid film forming composition for mulching vinyl, characterized in that it comprises a cooling step of lowering the temperature of the fourth mixture to less than 40 ℃, the natural cooling.

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