KR102318436B1 - Biodegradable functional coating compositions for mulching and it's mulching sites - Google Patents

Abstract

The present invention relates to a biodegradable functional coating composition for mulching paper and mulching paper coated thereby. The biodegradable functional coating composition for mulching paper includes, based on 100 parts by weight of water, 15-20 parts by weight of biotite, 5-15 parts by weight of activated carbon, 5-10 parts by weight of ascophyllum nodosum extract, 2-5 parts by weight of animal amino acids, 5-10 parts by weight of calcium, and 5-15 parts by weight of starch. According to the present invention, it is possible to solve the problem of soil contamination caused by general vinyl mulching through biodegradable composite materials, increase the growth of crops by controlling the temperature and humidity of the soil and having excellent light-shielding properties and air permeability, decompose naturally after 3 to 6 months and save labor since there is no need for a separate collection operation, and change acidified soil to slightly alkaline. In addition, the nutrients necessary for the growth of crops are sufficiently included in the biodegradation process, so the biodegradable functional coating composition helps growing the crops without a separate fertilization operation. In particular, the nutrients such as biotite, activated carbon, ascophyllum nodosum extract, and animal amino acids can prevent nutrient deficiency in the soil.

Description

Biodegradable functional coating composition for mulching paper and mulching paper coated thereby

The present invention relates to a biodegradable functional coating composition for mulching paper and a mulching paper coated therewith, and more particularly, it is possible to solve the soil contamination problem through a biodegradable composite material, suppresses the growth of weeds, and the temperature and humidity of the soil Mulching that not only saves labor, but also changes the acidified soil to weak alkalinity, as it is naturally decomposed after 3 to 6 months and does not require a separate collection operation It relates to a biodegradable functional coating composition for oil and mulching paper coated therewith.

Mulching refers to covering the surface of arable land when cultivating crops. It is performed for the purpose of preventing soil erosion, maintaining soil moisture, controlling the temperature, controlling weeds, preventing soil-borne pathogens, and preventing soil contamination.

In other words, mulching is a method of covering the soil surface of cultivated crops that are taking root, and has an erosion prevention effect that prevents the loss of the furrows in which the cultivated crops are rooted due to water damage, and reduces evaporation of moisture essential for growth to a certain extent. It plays a role of controlling moisture for cultivated crops within a certain range by suppressing it. In addition, mulching physically blocks the sunlight necessary for growth to other plants except for cultivated crops, thereby performing a weed suppression function along with a geothermal control function, and by maximally obstructing the growth of plants unnecessary for cultivation, weed removal. It suppresses the use of herbicides for the purpose of preventing soil contamination.

Mulching materials used for such mulching include eco-friendly materials such as rice straw, barley straw, grass, etc., but recently, synthetic resin materials such as polyethylene and polyvinyl chloride, which are easy to work and secure, are used. However, unlike vinyl for vinyl houses that are exposed to the road surface, the vinyl materials must be collected after burying them in the soil when the cultivation of crops is finished. It is difficult to remove, and there is a problem that the mulching material of the vinyl material that has not been removed is permanently left in some soil, causing environmental pollution. In other words, the recently used vinyl mulching material uses a lot of low-cost and easy-to-use vinyl resin, which makes it easy to maintain the moisture or heat retention of the soil. There is a problem that could not be done, and there is a inconvenience of having to remove the vinyl mulching material used in order to grow other crops after harvesting the crop, and it is difficult to completely remove it, so residues remain in the soil, which intensifies soil contamination, and the next crop Not only does it hinder the root development of the plant, but the vinyl mulching material that is not removed increases every year, causing serious problems.

In order to solve this problem, research on mulching materials that can be decomposed naturally in a natural state is being conducted. , ethyl acetate, methacrylate, powdered milk, isobutyl alcohol, is formed by mixing and processing a plastic resin into a biodegradable compound mixed with benzene and LMPE, and extruding the biodegradable compound, wherein the biodegradable compound is stearic acid 1-4 wt%, Heavy calcium carbonate 30-55 wt%, vinyl ketone-based copolymer 4-12 wt%, polyethylene wax 3-8 wt%, lactose 7-15 wt%, ethyl acetate 1-5 wt%, methyl methacrylate 1-7 wt% An eco-friendly biodegradable agricultural mulching film composed of wt%, 10-20 wt% powdered milk, 1-5 wt% isobutyl alcohol, 1-4 wt% benzene, and 2-7 wt% LMPE is presented. The prior art is an eco-friendly mulching farming method because biodegradable compounds and base polymers can be biodegraded by microbes in the soil even when exposed to the outside by UV irradiation or buried in soil by mixing a predetermined amount of a biodegradable compound and a base polymer. Although it provides an effect that can be widely used, etc., there is a problem that natural decomposition by soil microorganisms is not satisfactory by using a plastic resin, which is basically a polymer.

As another prior art, according to Korean Patent Laid-Open Publication No. 2009-0012918, it is formed by bonding expanded rice hull, sawdust, or a mixture thereof to natural cotton and pressing it, and mixing the natural cotton with expanded rice husk, sawdust or a mixture thereof. A natural mulching material having a ratio of 50 to 80% by weight of natural cotton, 20 to 50% by weight of expanded rice husk, sawdust, or a mixture thereof is presented. Since the prior art is made of only natural materials such as natural cotton, expanded rice husk (sawdust), and natural adhesive, it is possible to breathe the soil even if it is covered with the root of the crop, so that the root of the crop can grow strongly, thereby increasing the productivity of the crop. In addition, it is possible to suppress the occurrence of weeds, and as it is naturally decomposed by soil microorganisms, it provides an effect that does not require a separate removal measure, but there is a problem in that insect repellency and maintenance stability are lowered.

Therefore, it is a biodegradable, nature-friendly material that can prevent soil contamination, contains nutrients necessary for crop growth, helps crops in the biodegradation process, and contains functional ingredients with a control effect. There is a need to develop a biodegradable functional coating composition for mulching paper.

KR 10-0545271 B1 (2006.01.16.) KR 10-2009-0012918 A (2009.02.04.)

The present invention has been devised to solve the problems of the prior art, and the problem to be solved in the present invention is to be a biodegradable, nature-friendly material to prevent soil contamination, and to provide nutrients necessary for the growth of crops. To provide a biodegradable coating composition for mulching paper that contains functional ingredients that help crops in the biodegradation process and have a control effect.

Another object is to provide a mulching paper coated with the biodegradable coating composition for the mulching paper.

The biodegradable functional coating composition for mulching paper according to the present invention for achieving the above object is 15 to 20 parts by weight of biotite, 5 to 15 parts by weight of activated carbon, 5 to 10 parts by weight of ascophyllum nodosum extract with respect to 100 parts by weight of water. , 2 to 5 parts by weight of animal amino acids, 5 to 10 parts by weight of calcium, and 5 to 15 parts by weight of starch.

In addition, based on 100 parts by weight of the water, 5 to 10 parts by weight of additives are further included, and as additives, 30 to 50 parts by weight of a plasticizer, 10 to 30 parts by weight of a dispersant, 10 to 30 parts by weight of caustic soda, based on 100 parts by weight of the viscosity modifier. It is characterized in that it contains parts by weight.

In addition, based on 100 parts by weight of the water, 1 to 2 parts by weight of complex trace elements are further included, but the complex trace elements are ZnSO _{4 ·} 7H ₂ O, FeSO _{4 ·} 7H ₂ O, CuSO _{4 ·} 5H ₂ O, MnSO _{4 ·} It is characterized by mixing one or two or more of _{4H 2} O, Na ₂ MO _{4 ·} 2H _{2 O.}

According to another object of the present invention, it is possible to provide a mulching paper coated on one or both sides of the biodegradable functional coating composition for the mulching paper.

According to the present invention, it is possible to solve the soil contamination problem caused by general vinyl mulching through a biodegradable composite material, and it is excellent in inhibiting the growth of weeds, controlling the temperature and humidity of the soil, light-shielding and ventilation, and thus promoting the growth of crops. Since it is naturally decomposed after 3 to 6 months and does not require a separate collection operation, it not only saves labor, but also has the effect of changing the acidified soil to slightly alkaline.

In addition, the nutrients necessary for the growth of crops are sufficiently contained in the biodegradation process, so it helps the crops without a separate fertilization operation. can prevent nutritional deficiencies.

1 is a photograph of observing the biodegradation process over time after mulching in soil using mulching paper coated on both sides of the biodegradable functional coating composition for mulching paper according to the present invention.

Hereinafter, the present invention will be described in detail.

The present invention can solve the soil contamination problem through a biodegradable composite material, and can increase the growth of crops by inhibiting the growth of weeds, controlling the temperature and humidity of the soil, light-shielding properties and air permeability, 3~6 It relates to a biodegradable functional coating composition for mulching paper that not only saves labor because it is decomposed after a month and does not require a separate collection operation, but also changes acidified soil to weak alkalinity, and mulching paper coated thereby.

First, the biodegradable functional coating composition for mulching paper according to the present invention comprises water, biotite, activated carbon, ascophyllum nodosum extract, animal amino acids, calcium and starch.

More specifically, with respect to 100 parts by weight of water, 15-20 parts by weight of biotite, 5-15 parts by weight of activated carbon, 5-10 parts by weight of Ascophyllum nodosum extract, 2-5 parts by weight of animal amino acids, 5-10 parts by weight of calcium parts and 5 to 15 parts by weight of starch.

The water is for the compositions constituting the biodegradable functional coating composition for mulching paper according to the present invention to be diluted in the water and mixed evenly at the same time, and it is preferable to use water at 80 to 90°C.

If water of less than 80°C is used, the compositions may not be easily diluted in water and may not be mixed evenly, and if water exceeds 90°C, effective components of the compositions are destroyed, which is not preferable.

And, when the content of water is less than 100 parts by weight, the viscosity becomes too thick, so it may not be easy to coat the mulching paper, and when it exceeds 100 parts by weight, the viscosity is too thin and the adhesive strength is lowered.

Biotite purifies water and soil, facilitates the supply of oxygen through ion exchange, activates crop growth, prevents soil contamination by adsorbing harmful gases, improves acidic soil, and reduces damage to continuous cropping. It is a mineral that has the effect of reducing the aging of crops as a mineral component contained in

If the particle size distribution of biotite is less than the size mentioned above, the minerals contained in biotite may not be sufficiently diluted in water. , the work efficiency is also reduced.

If, with respect to 100 parts by weight of water, less than 15 parts by weight of biotite is included, it is difficult to sufficiently have the effect through the purification action of biotite, activation of crop growth, and the contained mineral components, and when it contains more than 20 parts by weight, It is undesirable because it can inhale and kill even fungi that are beneficial to crops or soil.

Activated carbon is made of carbon material through the combustion method by high heat treatment of leaves and stems of plants and cultivated plants living in nature, plant bark, plant roots, and fruits, It is processed into powder to have the particle size distribution of the mesh and then subjected to high heat treatment again. It emits far-infrared rays with a wavelength of 10 to 100 μm, blocks sunlight and sterilizes harmful bacteria, and various antibacterial and purification , performs a deodorizing function.

If, with respect to 100 parts by weight of water, less than 5 parts by weight of activated carbon is included, it is difficult to sufficiently have sun protection, antibacterial, purification and deodorization effects, and when it contains more than 15 parts by weight, the mulching paper There is a problem that the adhesive strength is lowered.

Ascophyllum nodosum extract is prepared by drying and pulverizing the washed Ascophyllum nodosum, mixing the dried and pulverized Ascophyllum nodosum with water and heating.

More specifically, the washed Ascophyllum nodosum is dried at 60 to 80° C. for 4 to 6 hours so that the moisture content is 7 to 10%, and then pulverized to a size of 200 to 300 mesh, and then dried and pulverized It is prepared by mixing water in the ascophyllum nodo island in a ratio of 1: 10 to 15 by weight, and heating it at 80 to 90° C. for 5 to 10 hours.

Ascophyllum nodosum is a brown seaweed. Among seaweeds, it contains growth regulators such as auxin, cytokinin, and gibberellin, as well as abundant trace elements and essential amino acids. , it has the effect of improving quality, extending shelf life and improving growth.

If, with respect to 100 parts by weight of water, when the ascophyllum nodosum extract is included in less than 5 parts by weight, it is difficult to sufficiently provide the effective nutrients of the ascophyllum nodosum to the crop, and when it contains more than 10 parts by weight, the crop In order to provide effective nutritional components of Ascophyllum nodo Island, it is uneconomical due to the content exceeding necessary, and the problem of lowering the adhesive strength of the mulching paper occurs.

Animal amino acids are produced by fermenting animal by-products including livestock or fish flesh, bones, hair, skin, muscle, blood, intestines and placenta with enzymes.

More specifically, pulverize animal by-products including flesh, bone, hair, skin, muscle, blood, intestines and placenta of livestock or fish, and purified water 300 to 500 parts by weight with alkaline substances added to 100 parts by weight of the pulverized animal by-products After breaking the cell membrane of the animal by-product by mixing parts by weight and adjusting the pH to 5 to 6.5, an enzyme is mixed with the animal by-product in which the cell membrane is disrupted and stirred at 50 to 100 rpm to maintain 55 to 65 ° C. .

Here, as the purified water to which the alkaline substance is added, a mixture of 10 to 15 parts by weight of NaOH or KOH may be used in 100 parts by weight of purified water.

In addition, as the enzyme, pepsin, renin, erepsin, aminopeptidase, prolinase, prolidase, enterokinase, peptide peptidase, carboxypeptidase, dipeptidase, papain, bromelin, ficin, actinidin, elastase, pan Creatine (pancreatin), nattokinase (nattokinase), arazyme (arazyme), collagenase (collagenase), keratinase (keratinase), gelatinase (gelatinase) and selected from the group comprising savinase (savinase) One or a mixture of both may be used.

The animal amino acid is a basic structural unit of protein constituting the body of an organism, and serves to help the absorption of the nitrogenous component, which is the most important component of the plant.

In particular, since plants synthesize amino acids by themselves or absorb them from the outside and store them in protein form or convert them into metabolic energy, and use them for various purposes, such as physiological activities, animal amino acids are coated on mulching paper to provide soil and plants. By doing this, the direct action of amino acids on the plant and the active growth of microorganisms to act as a nutrient source for soil microorganisms, and the process of converting absorbed nitrogen sources into amino acids in the plant body are omitted, thereby reducing energy consumption and strengthening the growth activity. can In addition, amino acids are quick to absorb nutrients into plants and have strong resistance to pests and diseases at low temperature and lack of sunlight, so they can quickly improve nutritional deficiencies and improve fruiting, improve plant root vitality and soil erosion, improve water holding capacity, and various It has the effect of increasing the productivity of the soil by fixing the nutrient source.

If, with respect to 100 parts by weight of water, less than 2 parts by weight of animal amino acids can not help the absorption of nitrogenous components, and when it contains more than 5 parts by weight, it is uneconomical due to the content exceeding necessary, as well as mulching There is a problem that the adhesive strength is lowered to the paper.

The calcium is used to improve acidic soil and to supply calcium nutrients to plants or fruits, and may be used in powder form having a particle size distribution of 400 to 700 mesh.

Calcium used in the present invention is calcium citrate (calcium salts of citric acid), calcium gluconate (calcium gluconate), calcium glycerophosphate (calcium glycerophosphate), calcium oxide (calcium oxide), calcium hydroxide (calcium hydroxide), calcium chloride ( calcium chloride), calcium lactate, calcium phosphate tribasic, calcium phosphate dibasic, calcium phosphate monobasic, calcium carbonate and calcium sulfate ) can be used by mixing one or two selected from the group containing.

If, with respect to 100 parts by weight of water, less than 5 parts by weight of calcium is included, it is difficult to provide sufficient calcium to crops. There is a problem that the adhesive strength is lowered.

The starch is a component that accelerates biodegradability, and its type or form is not significantly limited. For example, in the present invention, the starch may be unmodified starch, modified starch obtained by physical or chemical modification thereof, or a mixture thereof. Among them, unmodified starch includes corn starch, waxy corn starch, potato starch, sweet potato starch, wheat starch, tapioca starch, rice starch, etc. depending on the type of grain from which the starch is derived. .

In addition, the modified starch includes acid-treated starch, oxidized starch, esterified starch, oxidized esterified starch, etherified starch, oxidized etherified starch, crosslinked starch, and the like. There are starch nylsuccinate, starch phosphate, monostarch phosphate, starch phosphate phosphate, starch acetate, hydroxypropyl starch phosphate, and hydroxypropyl starch, and one or more of them can be selected.

If, with respect to 100 parts by weight of water, less than 5 parts by weight of starch is included, the biodegradability acceleration effect may be insignificant, and when it contains more than 15 parts by weight of starch, the tensile strength, elongation at break, weather resistance, etc. It is not preferable because there is a possibility that the physical properties may be deteriorated.

In the present invention, it is possible to control the viscosity by further including an additive, and prevent agglomeration of the starch.

More specifically, based on 100 parts by weight of water, 5 to 10 parts by weight of additives are further included, wherein the additives include 30 to 50 parts by weight of a plasticizer, 10 to 30 parts by weight of a dispersant, and caustic soda, based on 100 parts by weight of the viscosity modifier. 10 to 30 parts by weight.

Viscosity modifiers include hydroxypropyl methylcellulose, sodium carboxymethylcellulose, chitosan, polyethylene glycol (PEG), polylactic glycolamide (PLGA), polyvinyl alcohol (PVA). ), dextran, hyaluronic acid, or cross-linked hyaluronic acid, and one or a mixture of two or more thereof may be used.

The dispersing agent functions to modify physical properties, and one or a mixture of two or more of ammonium salts, active amines, organic acids, and inorganic acids may be used.

If, with respect to 100 parts by weight of water, less than 5 parts by weight of the additive is included, it is difficult to easily control the viscosity, and when it contains more than 10 parts by weight, there is a possibility that the physical properties may be deteriorated due to the content exceeding necessary, so it is preferable. can't

In addition, the present invention may further include complex trace elements.

More specifically, based on 100 parts by weight of water, 1 to 2 parts by weight of complex trace elements are further included, wherein the complex trace elements are ZnSO _{4 ·} 7H ₂ O, FeSO _{4 ·} 7H ₂ O, CuSO _{4 ·} 5H ₂ O, One or a mixture of two or more of MnSO _{4 ·} 4H ₂ O and Na ₂ MO _{4 ·} 2H _{2 O may be used.}

Complex trace elements act as components of enzymes in plants, even in small amounts, and are indispensable for plant growth. will play a role

And, the biodegradable functional coating composition for mulching paper may be coated on one or both sides of the mulching paper.

The biodegradable functional coating composition for mulching paper may be applied by adjusting the viscosity of the biodegradable functional coating composition for mulching paper to 100 to 500 cps depending on the type of crop when coating the mulching paper. That is, when the growth rate of the crop is fast, the decomposition rate can be increased by lowering the viscosity, and when the growth rate is slow, the decomposition rate can be slowed by increasing the viscosity.

As a coating method, a liquid biodegradable functional coating composition for mulching paper is coated on one or both sides of the mulching paper on one side or both sides by a coating nozzle while unwinding the mulching paper wound in a roll shape, and it is passed through a dryer to solidify and then rewind in a rewinder. have.

In the present invention, unbleached graft pulp may be used as mulching paper. This is because it is possible to increase the tearing phenomenon during mulching operation and the wet strength when wet in the rain by increasing the tensile and tearing strength by maintaining the paper quality and reducing the paper weight by lowering the basis weight of the paper.

According to the present invention, it is possible to solve the problem of soil contamination caused by the use of general vinyl mulching through a biodegradable composite material, and it is excellent in controlling the growth of weeds, controlling the temperature and humidity of the soil, light-shielding properties and breathability. It can increase the growth, and it is decomposed naturally after 3 to 6 months, so there is no need for a separate collection operation, so it not only saves labor but also has the effect of changing the acidified soil to slightly alkaline.

In addition, the nutrients necessary for the growth of crops are sufficiently contained in the biodegradation process, so it helps the crops without a separate fertilization operation. can prevent nutritional deficiencies.

Hereinafter, the present invention will be described in more detail through examples. However, it is clear to those skilled in the art that the following examples are only for specifically illustrating the present invention, and do not limit the scope of the present invention. That is, simple modifications or changes of the present invention can be easily made by those skilled in the art, and all such modifications or changes can be considered to be included in the scope of the present invention.

Experiment: Physical property evaluation

1. Tensile strength

In accordance with the 76 tensile strength test method of KS M 3503, the strength at break (kg/cm2) of the sample was measured, and the running direction (MD) and the width direction (TD) perpendicular to the running direction (MD) were measured respectively. The lowest value was taken.

2. Biodegradability

KS M 3100-1 The amount of carbon dioxide generated in the standard sample (cellulose) and the test sample was measured by the aerobic biodegradability measurement method of plastics under composting conditions (biodegradability (%) = (amount of carbon dioxide generated / Theoretical amount of carbon dioxide) × 100).

The content of the biodegradable functional coating composition for mulching paper of the present invention is shown in Table 1.

division Example 1 Example 2 Example 3 water 100 100 100 biotite 15 15 15 activated carbon 10 10 10 Ascophyllum nodo island extract 7 7 7 animal amino acids 5 5 5 calcium 7 7 7 starch 10 10 10 additive
(Viscosity regulator, plasticizer, dispersant, caustic soda)
0
7
7 complex trace elements 0 0 2

The evaluation of physical properties according to Examples 1 to 3 of the present invention is shown in Table 2.

division Example 1 Example 2 Example 3 Tensile strength (kg/㎠) 15.7 17.4 17.5 Biodegradability (25 days, %) 84 87 89

As can be seen from Table 2, Examples 1 to 3 according to the present invention have good mechanical properties with a tensile strength of 15.7 to 17.5 kg/cm 2 , and an excellent 25-day biodegradability of 84 to 89%. could check

1 is a photograph of observing the biodegradation process over time after mulching in soil using mulching paper coated on both sides of the biodegradable functional coating composition for mulching paper according to the present invention.

As shown in FIG. 1, the biodegradable functional coating composition for mulching paper according to the present invention (Example 3) was coated on both sides of the mulching paper, and the coated mulching paper was mulched in the soil, then the seedlings were planted and observed over 5 months. , It was confirmed that most of the mulching paper coated with the biodegradable functional coating composition for mulching paper according to the present invention on both sides was biodegradable.

Claims (4)

With respect to 100 parts by weight of water,
15-20 parts by weight of biotite,
5 to 15 parts by weight of activated carbon,
5-10 parts by weight of ascophyllum nodosum extract,
2-5 parts by weight of animal amino acids,
5 to 10 parts by weight of calcium and
A biodegradable functional coating composition for mulching paper, comprising 5 to 15 parts by weight of starch.
According to claim 1,
With respect to 100 parts by weight of the water, further comprising 5 to 10 parts by weight of an additive,
The additive is a biodegradable functional coating composition for mulching paper, characterized in that it contains 30 to 50 parts by weight of a plasticizer, 10 to 30 parts by weight of a dispersant, and 10 to 30 parts by weight of caustic soda, based on 100 parts by weight of the viscosity modifier.
According to claim 1,
Based on 100 parts by weight of the water, it further comprises 1 to 2 parts by weight of complex trace elements,
The complex trace element is ZnSO _{4 ·} 7H ₂ O, FeSO _{4 ·} 7H ₂ O, CuSO _{4 ·} 5H ₂ O, MnSO _{4 ·} 4H ₂ O, Na ₂ MO _{4 ·} Mixing one or more of 2H _{2 O} A biodegradable functional coating composition for mulching paper.
The mulching paper coated with the biodegradable functional coating composition for mulching paper of any one of claims 1 to 3 on one or both sides.

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