KR20230031743A - Method of manufacturing mulching film - Google Patents
Method of manufacturing mulching film Download PDFInfo
- Publication number
- KR20230031743A KR20230031743A KR1020210114302A KR20210114302A KR20230031743A KR 20230031743 A KR20230031743 A KR 20230031743A KR 1020210114302 A KR1020210114302 A KR 1020210114302A KR 20210114302 A KR20210114302 A KR 20210114302A KR 20230031743 A KR20230031743 A KR 20230031743A
- Authority
- KR
- South Korea
- Prior art keywords
- polyvinyl alcohol
- powder
- mulching film
- film
- calcium carbonate
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 133
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 108
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 107
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 107
- 240000000797 Hibiscus cannabinus Species 0.000 claims abstract description 60
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 54
- 239000004698 Polyethylene Substances 0.000 claims abstract description 44
- 229920000573 polyethylene Polymers 0.000 claims abstract description 44
- -1 polyethylene Polymers 0.000 claims abstract description 43
- 239000007864 aqueous solution Substances 0.000 claims abstract description 35
- 150000001875 compounds Chemical class 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 230000003301 hydrolyzing effect Effects 0.000 claims abstract description 6
- 238000012545 processing Methods 0.000 claims abstract description 3
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- 238000000354 decomposition reaction Methods 0.000 abstract description 16
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- 238000000034 method Methods 0.000 description 27
- 230000000052 comparative effect Effects 0.000 description 22
- 230000008569 process Effects 0.000 description 14
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 9
- 229920002554 vinyl polymer Polymers 0.000 description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 238000006065 biodegradation reaction Methods 0.000 description 8
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- 241000193830 Bacillus <bacterium> Species 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 4
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000009264 composting Methods 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 239000002362 mulch Substances 0.000 description 3
- 239000004626 polylactic acid Substances 0.000 description 3
- 102000004190 Enzymes Human genes 0.000 description 2
- 108090000790 Enzymes Proteins 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
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- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
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- 229920000747 poly(lactic acid) Polymers 0.000 description 2
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- 239000007787 solid Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 235000013311 vegetables Nutrition 0.000 description 2
- 241001124076 Aphididae Species 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 241000223221 Fusarium oxysporum Species 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 206010053759 Growth retardation Diseases 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 239000008103 glucose Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
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- 229910001385 heavy metal Inorganic materials 0.000 description 1
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- 239000002985 plastic film Substances 0.000 description 1
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- 150000008442 polyphenolic compounds Chemical class 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- A01G13/0275—
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protection of plants
- A01G13/30—Ground coverings
- A01G13/32—Mats; Nets; Sheets or films
- A01G13/33—Sheets or films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K11/00—Use of ingredients of unknown constitution, e.g. undefined reaction products
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
- C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/28—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture specially adapted for farming
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Environmental Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Toxicology (AREA)
- General Health & Medical Sciences (AREA)
- Protection Of Plants (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
Description
본 발명은 멀칭 필름 제조 방법에 관한 것으로, 보다 구체적으로 수용성 물질인 폴리비닐알콜이 물에 빠르게 용해되어 필름의 분해를 촉진시킬 수 있도록 하는 멀칭 필름 제조 방법에 관한 것이다.The present invention relates to a method for manufacturing a mulching film, and more particularly, to a method for manufacturing a mulching film in which polyvinyl alcohol, which is a water-soluble substance, is quickly dissolved in water to promote film decomposition.
멀칭(mulching; 피복)이란 비닐이나 짚 등으로 작물이 자라는 땅을 덮어서 토양 침식방지·토양 수분유지·지온 조절·잡초억제·토양 전염성 병균방지·토양 오염방지 등의 목적으로 실시되는 일을 의미한다.Mulching refers to work performed for the purpose of preventing soil erosion, maintaining soil moisture, controlling geothermal temperature, suppressing weeds, preventing contagious soil germs, and preventing soil contamination by covering the land where crops grow with vinyl or straw. .
농업용 멀칭 필름이 개발된 이후부터 원시적인 농업 경작 방법에서 비닐하우스, 비닐터널, 비닐 캡, 잡초성장 억제 등에 활용하게 됨으로써 생산자인 농민들에게는 높은 소득과 인력난을 해소할 수 있었고 소비자들은 언제, 어디서나 싱싱한 과일과 채소류를 염가로 공급받을 수 있게 되어 일대 농업 혁명의 계기가 되었다고 볼 수 있으나, 그로 인한 농업용 필름은 해가 갈수록 각 농가에 널리 보급되어 사용량은 급증하고 있다.Since the development of agricultural mulching film, it has been used in vinyl greenhouses, vinyl tunnels, vinyl caps, and weed growth suppression in primitive agricultural cultivation methods, so that farmers who are producers can solve high income and labor shortages, and consumers can always get fresh food anytime, anywhere. Fruits and vegetables can be supplied at a low price, which can be seen as an opportunity for a major agricultural revolution, but the resulting agricultural film is widely distributed to each farmhouse year after year, and usage is rapidly increasing.
영농과정에서 발생한 폐비닐의 소각, 토양 중 매립으로 농경지 오염과 농촌경관 훼손이 유발되며, 농촌 인구의 고령화로 인해 폐비닐 수거 비율이 감소하여 농경지에 그대로 방지되고 있으며, 수거되지 않고 방치된 폐비닐들은 토양에 방치 및 매립되어 작물의 생장 방해, 오염 유발의 요인이 되기도 하고 미관상 좋지 않다.Incineration and landfill of waste vinyl generated in the farming process cause farmland pollution and damage to rural landscapes. Due to the aging of the rural population, the collection rate of waste plastic is reduced and prevented as it is in farmland, and waste vinyl left uncollected They are neglected and buried in the soil, which can hinder the growth of crops, cause pollution, and are not aesthetically pleasing.
또한, 수거된 폐비닐이라도 이물질 세척, 건조 등의 여러 공정을 거쳐야 재활용을 할 수 있으나, 재생 처리 비용이 재활용 제품보다 오히려 비싼 상황으로 재처리에 소극적인 상황이며, 농업용 멀칭 필름은 사용 후 수집하여 소각 또는 매립하는 방법으로 처리하게 됨으로써 분진 및 유독성 가스를 방출하게 되어 각종 2차 오염을 유발하게 되어 날로 그 심각성이 더해지고 있다.In addition, even collected waste vinyl can be recycled only after going through various processes such as washing and drying foreign substances, but the cost of recycling is rather high compared to recycled products, so reprocessing is passive. Agricultural mulching films are collected after use and incinerated. Or, by being treated in a landfill method, dust and toxic gases are released, causing various secondary pollution, and the severity is increasing day by day.
친환경 농업용 멀칭 필름은, 기존의 생분해가 되지 않는 플라스틱 필름(비닐 계열)을 사용하던 것을 생분해성이 뛰어난 고분자와 적절한 첨가제, 산화방지제를 혼합하여 제조함으로써 기존 제품에 비해 토양의 공기 투과가 효율적이고, 잡초 억제, 병충해 방지 효과 및 지열 보존 등의 장점을 가지며, 폐기시에는 생분해가 일어나는 장점을 가지고 있어 친환경 농업에 필요한 농자재로 반드시 상품화 개발이 요구된다.Eco-friendly agricultural mulching film is manufactured by mixing a polymer with excellent biodegradability, appropriate additives, and antioxidants instead of using conventional non-biodegradable plastic film (vinyl-based). It has advantages such as suppressing weeds, preventing pests and diseases, and preserving geothermal heat, and has the advantage that biodegradation occurs when discarded, so commercialization development is required as an agricultural material necessary for eco-friendly agriculture.
멀칭 필름 개발 시장의 목표는 환경 친화적이며 생분해성이 뛰어난 친환경 농업용 필름의 개발이지만, 현재 사용되는 농업용 멀칭 필름은 석유화학 제품인 저밀도 폴리에틸렌(LDPE: Low Density Polyethylene)을 근간으로 한, 폴리에틸렌(PE)으로 만든 필름이 대부분 사용되고 있으며, 수거되지 않는 난분해 멀칭 필름은 토양에 잔류하여 장기적으로 토양 오염의 원인과 지력의 하락을 불러일으키고 있고, 더 장기적으로는 생산량의 감소를 초래하는 원인이 되고 있다.The goal of the mulching film development market is to develop environmentally friendly and biodegradable agricultural films, but currently used agricultural mulching films are made of polyethylene (PE) based on low density polyethylene (LDPE), a petrochemical product. Most of the produced films are used, and the recalcitrant mulch films that are not collected remain in the soil, causing soil contamination and deterioration of land strength in the long term, and causing a decrease in production in the longer term.
또한 석유 매장량의 고갈 우려와 환경오염, 지구 온난화 예방 및 유가 상승의 우려 속에 위와 같은 친환경 플라스틱 소재를 찾기 위한 노력이 꾸준히 진행되어 오고 있다.In addition, efforts to find eco-friendly plastic materials as described above have been steadily progressing amidst concerns about depletion of oil reserves, environmental pollution, prevention of global warming, and rising oil prices.
대표적인 생분해성 플라스틱 소재로서, 폴리락티드산(PLA: Poly Lactic Aicd)은 통상 옥수수에서 녹말을 분리하여 포도당을 발효한 젖산을 응축하여 고분자로 생산이 되며, 미생물(박테리아, 곰팡이 및 조류 등)에 의해 물(H2O)과 이산화탄소(CO2)로 완전히 생분해되는 소재로서 미국 식품의약청(FDA) 및 한국 식약청, 캐나다, 일본, 독일 등 유럽 관련 기관에서 인체 및 환경에 무해한 생분해 원료로 승인을 받은 소재이다.As a representative biodegradable plastic material, polylactic acid (PLA: Poly Lactic Aicd) is usually produced as a polymer by condensing lactic acid obtained by fermenting glucose by separating starch from corn. It is a material that is completely biodegradable into water (H2O) and carbon dioxide (CO2) and has been approved as a biodegradable raw material that is harmless to the human body and environment by the U.S. Food and Drug Administration (FDA), Korea Food and Drug Administration, Canada, Japan, and Germany.
그럼에도 불구하고 폴리락티드산(PLA) 단독으로 얇은 필름 형태의 기재가 만들어질 경우 재료 본래의 물성이 제한되어 인장강도, 인열 및 신율의 특성이 불충분하여 필름으로서 사용범위도 제한될 수밖에 없었던 상황이다.Nevertheless, when a substrate in the form of a thin film is made with only polylactic acid (PLA), the inherent physical properties of the material are limited, and the properties of tensile strength, tear, and elongation are insufficient, so the range of use as a film is inevitably limited. .
따라서, 이러한 필름은 분해성 멀칭 필름이 아닌 생분해성 멀칭 필름이라 할 수 있어 지속적으로 사용 시 그 잔류물들이 토양에 남아 있어 농지의 2차 오염 및 지력의 저하로 농업 생산량의 저하의 원인이 될 수 있다.Therefore, this film can be referred to as a biodegradable mulching film rather than a degradable mulching film, and when continuously used, its residues remain in the soil, which can cause secondary pollution of farmland and decrease in agricultural production due to deterioration of land strength. .
최근 생분해성 소재를 이용한 멀칭 필름 분야에서는 토양의 온도와 습도, 작목의 종류, 토양의 비옥도에 따라 분해시기 조정이 어렵고 분해가 너무 빨리 이루어져 제초 효과와 보온 효과가 떨어지고, 작물의 생산량이 줄어드는 등의 또 다른 문제점이 지적되면서, 생분해 멀칭 필름에 내가수성을 높이기 위한 기술개발이 요구된다.Recently, in the field of mulching films using biodegradable materials, it is difficult to adjust the decomposition time according to the temperature and humidity of the soil, the type of crop, and the fertility of the soil. As another problem is pointed out, technology development for improving water resistance of the biodegradable mulching film is required.
본 발명은 수용성 물질인 폴리비닐알콜이 물에 빠르게 용해되어 필름의 분해를 촉진시킬 수 있도록 하는 멀칭 필름 제조 방법을 제공하는 것을 목적으로 한다.An object of the present invention is to provide a method for manufacturing a mulching film in which polyvinyl alcohol, which is a water-soluble material, is quickly dissolved in water to promote decomposition of the film.
또한, 본 발명은 케나프(kenaf)를 이용하여 수지의 사용을 줄이고 재활용이 가능하지만 농업용으로 사용 시 비료로 대체가 가능하도록 하는 멀칭 필름 제조 방법을 제공하는 것을 목적으로 한다.In addition, an object of the present invention is to provide a method for manufacturing a mulching film using kenaf, which can reduce the use of resin and can be recycled, but can be replaced with fertilizer when used for agricultural purposes.
또한, 본 발명은 탄산칼슘을 이용하여 친환경소재로서 필름의 분해를 촉진하고 필름이 토양에서 잘 덮여있도록 무게를 가지도록 하는 멀칭 필름 제조 방법을 제공하는 것을 목적으로 한다.In addition, an object of the present invention is to provide a method for manufacturing a mulching film using calcium carbonate as an eco-friendly material to promote decomposition of the film and to have a weight so that the film is well covered in soil.
발명의 목적들은 이상에서 언급한 목적으로 제한되지 않으며, 언급되지 않은 본 발명의 다른 목적 및 장점들은 하기의 설명에 의해서 이해될 수 있고, 본 발명의 실시예에 의해 보다 분명하게 이해될 것이다. 또한, 본 발명의 목적 및 장점들은 특허 청구 범위에 나타낸 수단 및 그 조합에 의해 실현될 수 있음을 쉽게 알 수 있을 것이다.The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned above can be understood by the following description and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by means of the instrumentalities and combinations indicated in the claims.
이러한 목적을 달성하기 위한 멀칭 필름 제조 방법은 케나프 분말, 탄산칼슘 분말, 폴리비닐알콜(PVA: poly vinyl alcohol) 및 폴리에틸렌 분말을 준비하는 단계, 상기 폴리비닐알콜을 가수 분해하여 폴리비닐알콜 수용액을 제조하는 단계, 상기 케나프 분말, 탄산칼슘 분말 및 폴리에틸렌 분말을 상기 폴리비닐알콜 수용액에 혼합하여 생분해성 화합물을 제조하는 단계 및 상기 생분해성 화합물을 가공한 후 압출하여 멀칭 필름을 제조하는 단계를 포함한다.A method for manufacturing a mulching film to achieve this purpose includes preparing kenaf powder, calcium carbonate powder, polyvinyl alcohol (PVA), and polyethylene powder, and hydrolyzing the polyvinyl alcohol to obtain a polyvinyl alcohol aqueous solution. preparing, preparing a biodegradable compound by mixing the kenaf powder, calcium carbonate powder, and polyethylene powder with the polyvinyl alcohol aqueous solution, and processing and extruding the biodegradable compound to prepare a mulching film. do.
일 실시예에서, 상기 폴리비닐알콜을 가수 분해하여 폴리비닐알콜 수용액을 제조하는 단계는 상기 폴리비닐알콜 15~25 중량%에 증류수 24~50 중량%를 혼합하여, 30~55℃로 가수 분해하여 폴리비닐알콜 수용액을 제조하는 단계를 포함할 수 있다.In one embodiment, the step of hydrolyzing the polyvinyl alcohol to prepare a polyvinyl alcohol aqueous solution is to mix 24 to 50% by weight of distilled water with 15 to 25% by weight of the polyvinyl alcohol, and hydrolyze at 30 to 55 ° C. A step of preparing a polyvinyl alcohol aqueous solution may be included.
일 실시예에서, 상기 케나프 분말, 탄산칼슘 분말 및 폴리에틸렌 분말을 상기 폴리비닐알콜 수용액에 혼합하여 생분해성 화합물을 제조하는 단계는 상기 케나프 분말 15 ~ 25 중량%, 탄산칼슘 분말 15 ~ 25 중량% 및 폴리에틸렌 분말 15 ~ 25 중량%를 상기 폴리비닐알콜 수용액에 혼합하여 생분해성 화합물을 제조할 수 있다.In one embodiment, the step of preparing a biodegradable compound by mixing the kenaf powder, calcium carbonate powder, and polyethylene powder with the polyvinyl alcohol aqueous solution comprises 15 to 25% by weight of the kenaf powder and 15 to 25% by weight of calcium carbonate powder. % and 15 to 25% by weight of polyethylene powder may be mixed with the polyvinyl alcohol aqueous solution to prepare a biodegradable compound.
도 1은 본 발명에 따른 멀칭 필름 제조 방법의 일 실시예를 설명하기 위한 흐름도이다.1 is a flowchart for explaining an embodiment of a method for manufacturing a mulching film according to the present invention.
도 2는 본 발명에 따른 멀칭 필름 제조 방법의 다른 일 실시예를 설명하기 위한 흐름도이다.2 is a flowchart for explaining another embodiment of a method for manufacturing a mulching film according to the present invention.
도 3 내지 도 7은 본 발명의 일 실시예에 따른 멀칭 필름의 폐기 시 분해되는 과정을 설명하기 위한 예시도이다.3 to 7 are exemplary diagrams for explaining a disassembly process upon disposal of a mulching film according to an embodiment of the present invention.
전술한 목적, 특징 및 장점은 첨부된 도면을 참조하여 상세하게 후술되며, 이에 따라 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 본 발명의 기술적 사상을 용이하게 실시할 수 있을 것이다. 본 발명을 설명함에 있어서 본 발명과 관련된 공지 기술에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우에는 상세한 설명을 생략한다. 이하, 첨부된 도면을 참조하여 본 발명에 따른 바람직한 실시예를 상세히 설명하기로 한다. 도면에서 동일한 참조부호는 동일 또는 유사한 구성요소를 가리키는 것으로 사용된다.The above objects, features and advantages will be described later in detail with reference to the accompanying drawings, and accordingly, those skilled in the art to which the present invention belongs will be able to easily implement the technical spirit of the present invention. In describing the present invention, if it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.
본 발명의 생분해성 고분자는 적어도 분해의 한 과정에서 생물의 대사가 관여하여 저분자량 화합물로 변하는 고분자 물질을 의미한다. 이상적인 생분해성 고분자는 사용하고 있는 동안에는 우수한 성능을 발휘하고 폐기 후에는 자연계의 미생물에 의해 신속하게 분해되는 것이 바람직하다.The biodegradable polymer of the present invention refers to a high molecular substance that is changed into a low molecular weight compound by being involved in the metabolism of organisms in at least one process of decomposition. An ideal biodegradable polymer preferably exhibits excellent performance while in use and is rapidly degraded by natural microorganisms after disposal.
일반적으로 미생물에 의한 고분자의 분해는 우선 미생물이 균체 외로 분비하는 분해효소가 고분자 재료 표면에 흡착하여 고분자의 에스테르 결합, 글리코사이드 결합, 펩타이드 결합 등의 화학결합을 가수 분해시켜 절단하여 고분자물질을 저분자화 한다. In general, in the decomposition of macromolecules by microorganisms, decomposition enzymes secreted by microorganisms to the outside of the cells adsorb on the surface of the polymer material to hydrolyze and cut chemical bonds such as ester bonds, glycosidic bonds, and peptide bonds of the polymers. get angry
고분자물질의 저분자화에 따라 재료는 붕괴하고 생성물은 효소분해에 의해 단위체나 이량체의 저분자량의 분해생성물로 된다. 이와 같이 미생물의 균체 외 분해효소에 의해 고분자의 주쇄가 절단되어 저분자화하는 과정을 1차분해(primary degradation)과정이라 한다. As the molecular weight of the high molecular substance is reduced, the material is disintegrated and the product becomes a low molecular weight decomposition product of the monomer or dimer by enzymatic degradation. In this way, a process in which the main chain of a polymer is cleaved by an extracellular degradation enzyme of a microorganism and reduced to a low molecular weight is referred to as a primary degradation process.
효소분해에 의해 분해된 저분자의 단위체나 이량체는 미생물의 체내로 흡수되어 여러 가지의 대사경로를 통해 각종 생체고분자를 합성하기 위해 사용되든지 또는 에너지 생산을 위해 사용되어 탄산가스(호기적 환경)나 메탄(혐기적 환경)으로 변환된다. 이 과정을 완전분해(ultimate degradation)과정이라 한다.The low-molecular unit or dimer decomposed by enzymatic degradation is absorbed into the body of microorganisms and used to synthesize various biopolymers through various metabolic pathways or used for energy production, such as carbon dioxide (in an aerobic environment) or converted to methane (anaerobic environment). This process is called the ultimate degradation process.
본 명세서에서 사용된 용어 중 “폴리비닐알콜(PVA: Polyvinyl Alcohol)”은 석유 자원이 아닌 석회석에서 그 원료를 얻을 수 있는, 환경 문제에 대처할 수 있는 미래 지향적인 소재이다. 상기의 투명 포장용 필름, 사무용 접착제, 카드 보드지, 세탁용 풀, 종이의 코팅제 및 강화제 등 넓은 분야에 걸쳐 사용되고 있다. Among the terms used in this specification, “Polyvinyl Alcohol (PVA)” is a future-oriented material that can cope with environmental problems and can be obtained from limestone rather than petroleum resources. It is used in a wide range of fields such as the transparent packaging film, office adhesive, card board paper, laundry glue, coating agent and reinforcing agent for paper.
상기의 폴리비닐알콜은 분해가 세포 외적 공격으로 물과 이산화탄소를 생성하는 식물성 병원성의 진균류인 Fusarium lini의 작용을 확인함으로 폴리비닐알콜은 결국 생분해된다는 것이 알려졌다. It is known that polyvinyl alcohol is eventually biodegraded by confirming the action of Fusarium lini, a phytopathogenic fungus, which decomposes and generates water and carbon dioxide through extracellular attack.
본 명세서에서 사용된 용어 중 “케나프(kenaf)”는 단백질과 섬유질 함량이 높고 칼슘, 칼륨, 마그네슘, 인, 철 등의 미생물의 성장에 도움이 되고 항산화제인 폴리페놀을 다량 함유하기 때문에 사육 가축의 생육에 도움이 되는 프리바이오틱스로서도 유용한 기능을 가지고 있다. Among the terms used in this specification, “kenaf” is used for breeding livestock because it is high in protein and fiber, helps in the growth of microorganisms such as calcium, potassium, magnesium, phosphorus, and iron, and contains a large amount of polyphenols, which are antioxidants. It also has a useful function as a prebiotic that helps the growth of
상기의 케나프(kenaf)는 다양한 미량 원소를 함유하고 있으며, 입도 크기 조절이 가능하여 고체 배양 시 산소가 필요한 미생물에 공극을 제공할 수 있고 광물질과는 달리 독성 및 세균의 생장을 저해하는 중금속 원소가 없고, 식물성 섬유질과 조직 구조를 가지고 있어 미생물이 부착, 생장할 수 있는 담체로 사용할 수 있고, 수분 조절이 용이한 이상적인 재료이다.The above-mentioned kenaf contains various trace elements and can be adjusted in particle size to provide air gaps for microorganisms that require oxygen during solid culture, and unlike minerals, heavy metal elements that inhibit toxicity and growth of bacteria. It has no vegetable fiber and tissue structure, so it can be used as a carrier for attaching and growing microorganisms, and it is an ideal material that can easily control moisture.
본 발명에서 사용하고자 하는 케나프(kenaf)는 고체 배양이 완료된 담체의 수분 함량이 17%이하, 입도가 최소크기 1mm ~ 2mm에서 최대 10mm ~ 30mm로 분쇄기로 분쇄한 파우더를 의미한다. Kenaf to be used in the present invention means a powder pulverized by a pulverizer with a water content of 17% or less and a particle size of a minimum size of 1 mm to 2 mm to a maximum of 10 mm to 30 mm in a solid cultured carrier.
본 명세서에서 사용된 용어 중 “멀칭 필름”은 지온 상승, 지온 안정, 토양 수분 유지, 토양 유실방지, 잡초 발생 억제 및 진딧물 비래 억제 등을 위해 사용하는 필름으로, 토양을 피복하기 위해 사용하는 필름을 의미한다.Among the terms used in this specification, “mulching film” is a film used for raising ground temperature, stabilizing ground temperature, maintaining soil moisture, preventing soil loss, suppressing weed growth, and suppressing aphid flight, and refers to a film used to cover soil. it means.
도 1은 본 발명에 따른 멀칭 필름 제조 방법의 일 실시예를 설명하기 위한 흐름도이다.1 is a flowchart for explaining an embodiment of a method for manufacturing a mulching film according to the present invention.
도 1을 참조하면, 멀칭 필름 제조 방법의 단계 S110에서는 케나프(kenaf) 분말, 탄산칼슘 분말 및 폴리비닐알콜(PVA: poly vinyl alcohol)을 준비한다. Referring to FIG. 1 , in step S110 of the method for manufacturing a mulching film, kenaf powder, calcium carbonate powder, and polyvinyl alcohol (PVA) are prepared.
단계 S120에서는 상기 폴리비닐알콜을 가수 분해하여 폴리비닐알콜 수용액을 제조한다. In step S120, the polyvinyl alcohol is hydrolyzed to prepare a polyvinyl alcohol aqueous solution.
단계 S120에 대한 일 실시예에서는 폴리비닐알콜 15 중량%에 증류수 24 중량 %를 혼합하여, 80~85℃에서 2시간 교반하여 폴리비닐알콜 수용액을 제조할 수 있다. In one embodiment for step S120, a polyvinyl alcohol aqueous solution may be prepared by mixing 24% by weight of distilled water with 15% by weight of polyvinyl alcohol and stirring at 80 to 85 ° C. for 2 hours.
상기의 폴리비닐알콜은 멀칭 필름의 폐기 시 멀칭 필름의 분해를 촉진시키는데 사용된다. 따라서, 본 발명은 멀칭 필름을 제조 시 폴리비닐알콜을 이용함으로써 멀칭 필름의 폐기 시 폴리비닐알콜의 성분으로 인해 멀칭 필름이 분해되도록 한다. The above polyvinyl alcohol is used to promote decomposition of the mulching film when discarding the mulching film. Therefore, the present invention uses polyvinyl alcohol when manufacturing the mulching film, so that the mulching film is decomposed due to the components of the polyvinyl alcohol when the mulching film is discarded.
도 1의 실시예는 폴리비닐알콜을 이용하여 폴리비닐알콜 수용액을 제조하는 실시예이지만, 폴리비닐알콜 수용액을 제조하지 않고 분말 형태로 폴리비닐알콜 분말을 상기 케나프 분말 및 탄산칼슘 분말을 함께 혼합하는 경우 단계 S120은 실행하지 않는다. The embodiment of FIG. 1 is an embodiment in which a polyvinyl alcohol aqueous solution is prepared using polyvinyl alcohol, but polyvinyl alcohol powder in powder form is mixed with the kenaf powder and calcium carbonate powder without preparing the polyvinyl alcohol aqueous solution. If so, step S120 is not executed.
단계 S130에서는 상기 케나프 분말 및 탄산칼슘 분말을 상기 단계 S120에서 제조된 폴리비닐알콜 수용액에 혼합하여 생분해성 화합물을 제조한다. In step S130, a biodegradable compound is prepared by mixing the kenaf powder and calcium carbonate powder with the polyvinyl alcohol aqueous solution prepared in step S120.
단계 S130에 대한 일 실시예에서는 케나프 분말 및 탄산칼슘 분말을 증류수와 혼합하여 70~80℃에서 1~2시간 가열한 후 단계 S120에서 제작된 폴리비닐알콜 수용액에 혼합하여 생분해성 화합물을 제조할 수 있다. In an embodiment of step S130, kenaf powder and calcium carbonate powder are mixed with distilled water, heated at 70 to 80 ° C. for 1 to 2 hours, and then mixed with the polyvinyl alcohol aqueous solution prepared in step S120 to prepare a biodegradable compound. can
이때, 상기 케나프 분말 15 ~ 25 중량%, 탄산칼슘 분말 15 ~ 25 중량% 및 폴리에틸렌 분말 15 ~ 25 중량%를 상기 단계 S120에서 제작된 폴리비닐알콜 수용액에 혼합하여 생분해성 화합물을 제조할 수 있다. At this time, a biodegradable compound can be prepared by mixing 15 to 25% by weight of the kenaf powder, 15 to 25% by weight of the calcium carbonate powder, and 15 to 25% by weight of the polyethylene powder in the polyvinyl alcohol aqueous solution prepared in step S120. .
도 1의 실시예에서, 단계 S120을 통해 폴리비닐알콜을 가수 분해하여 폴리비닐알콜 수용액으로 제조되는 경우 단계 S130에서는 케나프 분말 및 탄산칼슘 분말을 폴리비닐알콜 수용액에 혼합한다. In the embodiment of FIG. 1, when polyvinyl alcohol is hydrolyzed in step S120 to produce a polyvinyl alcohol aqueous solution, kenaf powder and calcium carbonate powder are mixed with the polyvinyl alcohol aqueous solution in step S130.
이에 반하여, 단계 S120을 실행하지 않아 폴리비닐알콜이 폴리비닐알콜 분말로 존재하는 경우 단계 S130에서는 폴리비닐알콜 분말, 케나프 분말 및 탄산칼슘 분말이 증류수와 혼합하여 70~80℃에서 1~2시간 가열한 후 단계 S120에서 제작된 폴리비닐알콜 수용액에 혼합하여 생분해성 화합물을 제조할 수 있다. In contrast, when step S120 is not performed and polyvinyl alcohol is present as polyvinyl alcohol powder, in step S130, polyvinyl alcohol powder, kenaf powder, and calcium carbonate powder are mixed with distilled water and stirred at 70 to 80 ° C for 1 to 2 hours. After heating, a biodegradable compound may be prepared by mixing with the polyvinyl alcohol aqueous solution prepared in step S120.
본 발명은 멀칭 필름을 제조 시 케나프 분말을 이용함으로써 멀칭 필름을 폐기하기 위해 토양에 매립하더라도 폴리비닐알콜에 의해 폴리에틸렌 필름이 녹아 멀칭 필름에 구멍이 생기거나 멀칭 필름이 약해서 케나프 분말이 멀칭 필름의 표면에 노출되면 케나프 분말의 바실러스 효모를 통해 폴리비닐알콜을 분해할 수 있는 것이다. 또한, 케나프 분말은 농업용으로 사용 시 비료로 대체가 가능하다.The present invention uses kenaf powder when manufacturing a mulching film, so even if the mulching film is buried in the soil to dispose of it, the polyethylene film is melted by polyvinyl alcohol, causing holes in the mulching film or the mulching film is weak, so that the kenaf powder is not removed from the mulching film. When exposed to the surface of kenaf powder, it can degrade polyvinyl alcohol through Bacillus yeast. In addition, kenaf powder can be substituted for fertilizer when used for agricultural purposes.
본 발명은 멀칭 필름을 제조 시 탄산칼슘 분말은 생분해성 화합물에 기계적, 열적 성질이나 혹은 작업성을 개선하기 위해 보강제로서 사용될 수 있으며, 멀칭 필름을 폐기하기 위해 토양에 매립하더라도 토양에서 잘 덮여있도록 무게를 가지게 하며, 멀칭 필름의 분해를 촉진다. In the present invention, when preparing a mulching film, calcium carbonate powder can be used as a reinforcing agent to improve the mechanical, thermal properties or workability of a biodegradable compound, and even if buried in the soil to discard the mulching film, it weighs so that it is well covered in the soil. and accelerate the decomposition of the mulching film.
단계 S140에서는 생분해성 화합물을 폴리에틸렌 필름에 코팅하여 멀칭 필름(실험예 1)을 제조한다.In step S140, a biodegradable compound is coated on a polyethylene film to prepare a mulching film (Experimental Example 1).
상기와 같은 과정을 통해 제조된 멀칭 필름은 케나프 분말, 탄산칼슘 분말 및 폴리비닐알콜을 포함하고 있다. 이러한 멀칭 필름은 탄산칼슘 분말을 포함하기 때문에 필름이 토양에서 잘 덮여있도록 무게를 가지게 된다. The mulching film prepared through the above process includes kenaf powder, calcium carbonate powder, and polyvinyl alcohol. Because these mulch films contain calcium carbonate powder, they have the weight to ensure that the film is well covered in the soil.
또한, 멀칭 필름을 폐기하기 위해 토양에 매립하더라도 폴리비닐알콜에 의해 멀칭 필름이 녹아서 구멍이 생기거나 케나프 분말 및 탄산칼슘 분말이 멀칭 필름의 표면에 노출된다. In addition, even if the mulching film is buried in the soil to dispose of it, the mulching film is melted by polyvinyl alcohol and holes are formed, or kenaf powder and calcium carbonate powder are exposed on the surface of the mulching film.
상기와 같이 케나프 분말 및 탄산칼슘 분말이 멀칭 필름의 표면에 노출되면 폴리비닐알콜은 케냐프 분말에 있는 바실러스 효모에 의해 분해된다. 또한, 멀칭 필름은 케나프 분말 및 탄산칼슘 분말에 의해 분해가 촉진될 수 있다.As described above, when the kenaf powder and calcium carbonate powder are exposed to the surface of the mulching film, polyvinyl alcohol is decomposed by Bacillus yeast in the kenaf powder. In addition, decomposition of the mulching film may be accelerated by kenaf powder and calcium carbonate powder.
도 2는 본 발명에 따른 멀칭 필름 제조 방법의 다른 일 실시예를 설명하기 위한 흐름도이다.2 is a flowchart for explaining another embodiment of a method for manufacturing a mulching film according to the present invention.
도 2를 참조하면, 멀칭 필름 제조 방법의 단계 S210에서는 케나프(kenaf) 분말, 탄산칼슘 분말, 폴리비닐알콜(PVA: poly vinyl alcohol) 및 폴리에틸렌 분말을 준비한다. Referring to FIG. 2 , in step S210 of the method for manufacturing a mulching film, kenaf powder, calcium carbonate powder, polyvinyl alcohol (PVA), and polyethylene powder are prepared.
단계 S220에서는 상기 폴리비닐알콜을 가수 분해하여 폴리비닐알콜 수용액을 제조한다. In step S220, the polyvinyl alcohol is hydrolyzed to prepare a polyvinyl alcohol aqueous solution.
단계 S220에 대한 일 실시예에서는 폴리비닐알콜 15 중량%에 증류수 24 중량 %를 혼합하여, 80~85℃에서 2시간 교반하여 폴리비닐알콜 수용액을 제조할 수 있다. In one embodiment for step S220, a polyvinyl alcohol aqueous solution may be prepared by mixing 24% by weight of distilled water with 15% by weight of polyvinyl alcohol and stirring at 80 to 85 ° C. for 2 hours.
상기의 폴리비닐알콜 수용액은 멀칭 필름의 폐기 시 멀칭 필름의 분해를 촉진시키는데 사용된다. 따라서, 본 발명은 멀칭 필름을 제조 시 폴리비닐알콜 수용액을 이용함으로써 멀칭 필름의 폐기 시 폴리비닐알콜의 성분으로 인해 멀칭 필름이 분해되도록 한다. The polyvinyl alcohol aqueous solution is used to promote decomposition of the mulching film when discarding the mulching film. Therefore, the present invention uses a polyvinyl alcohol aqueous solution when preparing a mulching film, so that the mulching film is decomposed due to the components of the polyvinyl alcohol when the mulching film is discarded.
도 2의 실시예는 폴리비닐알콜을 이용하여 폴리비닐알콜 수용액을 제조하는 실시예이지만, 폴리비닐알콜 수용액을 제조하지 않고 분말 형태로 폴리비닐알콜 분말을 상기 케나프 분말, 탄산칼슘 분말 및 폴리에틸렌 분말과 함께 혼합하는 경우 단계 S220은 실행하지 않는다. The embodiment of FIG. 2 is an embodiment in which a polyvinyl alcohol aqueous solution is prepared using polyvinyl alcohol, but the polyvinyl alcohol powder in powder form is prepared without preparing the polyvinyl alcohol aqueous solution, the kenaf powder, the calcium carbonate powder, and the polyethylene powder. When mixed with, step S220 is not executed.
단계 S230에서는 상기 케나프 분말, 탄산칼슘 분말 및 폴리에틸렌 분말을 상기 단계 S220에서 제조된 폴리비닐알콜 수용액에 혼합하여 생분해성 화합물을 제조한다. In step S230, a biodegradable compound is prepared by mixing the kenaf powder, calcium carbonate powder, and polyethylene powder with the polyvinyl alcohol aqueous solution prepared in step S220.
단계 S230에 대한 일 실시예에서는 케나프 분말 및 탄산칼슘 분말을 증류수와 혼합하여 70~80℃에서 1~2시간 가열한 후 단계 S120에서 제작된 폴리비닐알콜 수용액에 혼합하여 생분해성 화합물을 제조할 수 있다. In one embodiment of step S230, kenaf powder and calcium carbonate powder are mixed with distilled water, heated at 70 to 80 ° C. for 1 to 2 hours, and then mixed with the polyvinyl alcohol aqueous solution prepared in step S120 to prepare a biodegradable compound. can
이때, 상기 케나프 분말 15 ~ 25 중량%, 탄산칼슘 분말 15 ~ 25 중량% 및 폴리에틸렌 분말 15 ~ 25 중량%를 상기 단계 S120에서 제작된 폴리비닐알콜 수용액에 혼합하여 생분해성 화합물을 제조할 수 있다. At this time, a biodegradable compound can be prepared by mixing 15 to 25% by weight of the kenaf powder, 15 to 25% by weight of the calcium carbonate powder, and 15 to 25% by weight of the polyethylene powder in the polyvinyl alcohol aqueous solution prepared in step S120. .
도 2의 실시예에서, 단계 S220을 통해 폴리비닐알콜을 가수 분해하여 폴리비닐알콜 수용액으로 제조되는 경우 단계 S230에서는 케나프 분말, 탄산칼슘 분말 및 폴리에틸렌 분말을 폴리비닐알콜 수용액에 혼합한다. In the embodiment of FIG. 2 , when polyvinyl alcohol is hydrolyzed in step S220 to produce a polyvinyl alcohol aqueous solution, kenaf powder, calcium carbonate powder, and polyethylene powder are mixed with the polyvinyl alcohol aqueous solution in step S230.
이에 반하여, 단계 S220을 실행하지 않아 폴리비닐알콜이 폴리비닐알콜 분말로 존재하는 경우 단계 S230에서는 폴리비닐알콜 분말 15 ~ 25 중량%, 케나프 분말 15 ~ 25 중량%, 탄산칼슘 분말 15 ~ 25 중량% 및 폴리에틸렌 분말 15 ~ 25 중량%이 증류수와 혼합하여 70~80℃에서 1~2시간 가열한 후 단계 S120에서 제작된 폴리비닐알콜 수용액에 혼합하여 생분해성 화합물을 제조할 수 있다. In contrast, when step S220 is not performed and polyvinyl alcohol is present as polyvinyl alcohol powder, in step S230, 15 to 25% by weight of polyvinyl alcohol powder, 15 to 25% by weight of kenaf powder, and 15 to 25% by weight of calcium carbonate powder % and 15 to 25% by weight of polyethylene powder are mixed with distilled water, heated at 70 to 80 ° C. for 1 to 2 hours, and then mixed with the polyvinyl alcohol aqueous solution prepared in step S120 to prepare a biodegradable compound.
단계 S240에서는 생분해성 화합물을 필름 형상으로 성형하여 멀칭 필름(실험예 1)을 제조한다.In step S240, a mulching film (Experimental Example 1) is prepared by molding the biodegradable compound into a film shape.
상기와 같은 과정을 통해 제조된 멀칭 필름은 케나프 분말, 탄산칼슘 분말 및 폴리비닐알콜을 포함하고 있다. 이러한 멀칭 필름은 탄산칼슘 분말을 포함하기 때문에 필름이 토양에서 잘 덮여있도록 무게를 가지게 된다. The mulching film prepared through the above process includes kenaf powder, calcium carbonate powder, and polyvinyl alcohol. Because these mulch films contain calcium carbonate powder, they have the weight to ensure that the film is well covered in the soil.
또한, 멀칭 필름을 폐기를 위해 토양에 매립하더라도 폴리비닐알콜에 의해 멀칭 필름이 녹아서 구멍이 생기거나 케나프 분말 및 탄산칼슘 분말이 멀칭 필름의 표면에 노출된다. In addition, even if the mulching film is buried in the soil for disposal, the mulching film is melted by polyvinyl alcohol and holes are formed, or kenaf powder and calcium carbonate powder are exposed on the surface of the mulching film.
상기와 같이 케나프 분말 및 탄산칼슘 분말이 멀칭 필름의 표면에 노출되면 폴리비닐알콜은 케냐프 분말에 있는 바실러스 효모에 의해 분해된다. 또한, 멀칭 필름은 케나프 분말 및 탄산칼슘 분말에 의해 분해가 촉진될 수 있다.As described above, when the kenaf powder and calcium carbonate powder are exposed to the surface of the mulching film, polyvinyl alcohol is decomposed by Bacillus yeast in the kenaf powder. In addition, decomposition of the mulching film may be accelerated by kenaf powder and calcium carbonate powder.
이하에서는, 도 3 내지 도 7을 참조하여 본 발명의 일 실시예에 따른 멀칭 필름(실험예 1) 및 비교예(비교예 1 내지 비교예 4)를 비교하여 멀칭 필름의 폐기 시 분해되는 과정 및 효과를 설명하기로 한다.Hereinafter, the mulching film according to an embodiment of the present invention (Experimental Example 1) and Comparative Examples (Comparative Examples 1 to 4) are compared with reference to FIGS. effect will be explained.
비교예1Comparative Example 1
도 3의 참조번호(a)와 같이 케나프 분말(100) 및 폴리에틸렌 필름(400)을 이용하여 멀칭 필름을 제조하였다.As shown in reference numeral (a) of FIG. 3, a mulching film was prepared using the kenaf powder 100 and the polyethylene film 400.
본 발명은 도 4의 참조번호(b)와 같이 케나프 분말(100), 탄산칼슘 분말, 폴리비닐알콜(300) 및 폴리에틸렌 필름(400)을 이용하여 멀칭 필름을 제조하였지만, 상기의 비교예 1은 도 3의 참조번호(a)와 같이 케나프 분말(100) 및 폴리에틸렌 필름(400)을 이용하여 멀칭 필름을 제조하였다. In the present invention, a mulching film was prepared using kenaf powder 100, calcium carbonate powder, polyvinyl alcohol 300 and polyethylene film 400 as shown in reference number (b) of FIG. 4, but Comparative Example 1 As shown in reference numeral (a) of FIG. 3, a mulching film was prepared using the kenaf powder 100 and the polyethylene film 400.
비교예2Comparative Example 2
도 3의 참조번호(b)와 같이 탄산칼슘 분말(200) 및 폴리에틸렌 필름(400)을 이용하여 멀칭 필름을 제조하였다.As shown in reference number (b) of FIG. 3, a mulching film was prepared using the calcium carbonate powder 200 and the polyethylene film 400.
본 발명은 도 4의 참조번호(b)와 같이 케나프 분말(100), 탄산칼슘 분말(200), 폴리비닐알콜(300) 및 폴리에틸렌 필름(400)을 이용하여 멀칭 필름을 제조하였지만, 상기의 비교예 2는 탄산칼슘 분말(200) 및 폴리에틸렌 필름(400)을 이용하여 멀칭 필름을 제조하였다.In the present invention, a mulching film was prepared using kenaf powder 100, calcium carbonate powder 200, polyvinyl alcohol 300 and polyethylene film 400 as shown in reference number (b) of FIG. 4, but the above In Comparative Example 2, a mulching film was prepared using calcium carbonate powder (200) and a polyethylene film (400).
비교예 3Comparative Example 3
도 4의 참조번호(c)와 같이 폴리비닐알콜(300) 및 폴리에틸렌 필름(400)을 이용하여 멀칭 필름을 제조하였다.As shown in reference number (c) of FIG. 4, a mulching film was prepared using polyvinyl alcohol 300 and a polyethylene film 400.
본 발명은 도 4의 참조번호(b)와 같이 케나프 분말(100), 탄산칼슘 분말(200), 폴리비닐알콜(300) 및 폴리에틸렌 필름(400)을 이용하여 멀칭 필름을 제조하였지만, 상기의 비교예 3은 도 3의 참조번호(c)와 같이 폴리비닐알콜(300) 및 폴리에틸렌 필름(400)을 이용하여 멀칭 필름을 제조하였다.In the present invention, a mulching film was prepared using kenaf powder 100, calcium carbonate powder 200, polyvinyl alcohol 300 and polyethylene film 400 as shown in reference number (b) of FIG. 4, but the above In Comparative Example 3, a mulching film was prepared using polyvinyl alcohol 300 and a polyethylene film 400 as shown in reference number (c) in FIG.
비교예 4Comparative Example 4
도 4의 참조번호(a)와 같이 케나프 분말(100) 및 탄산칼슘 분말(200)을 이용하여 멀칭 필름을 제조하였다.As shown in reference number (a) of FIG. 4, a mulching film was prepared using kenaf powder 100 and calcium carbonate powder 200.
본 발명은 도 4의 참조번호(b)와 같이 케나프 분말(100), 탄산칼슘 분말(200), 폴리비닐알콜(300) 및 폴리에틸렌 필름(400)을 이용하여 멀칭 필름을 제조하였지만, 상기의 비교예 4는 도 4의 참조번호(a)와 같이 케나프 분말(100) 및 탄산칼슘 분말(200)을 이용하여 멀칭 필름을 제조하였다.In the present invention, a mulching film was prepared using kenaf powder 100, calcium carbonate powder 200, polyvinyl alcohol 300 and polyethylene film 400 as shown in reference number (b) of FIG. 4, but the above In Comparative Example 4, a mulching film was prepared using kenaf powder 100 and calcium carbonate powder 200 as shown in reference number (a) in FIG. 4 .
이하에서는, [표 1]을 참조하여 실험 예 1 및 비교예(비교예 1 내지 비교예 4)의 멀칭 필름을 호기성 퇴비화 조건에서 생분해도를 측정하기 위해서 퇴비화 과정 중 멀칭 필름의 중량을 측정한 후 중량에 따라 생분해 속도를 비교하여 설명하기로 한다. Hereinafter, in order to measure the biodegradability of the mulching films of Experimental Example 1 and Comparative Examples (Comparative Examples 1 to 4) with reference to [Table 1] under aerobic composting conditions, after measuring the weight of the mulching films during the composting process, It will be described by comparing the biodegradation rate according to the weight.
여기서, 퇴비는 생분해에 의해 얻어진 식물성 잔류물로 구성된 혼합물과 기타 유기물, 특정 무기 성분이 포함된 토양을 조절하는 유기물이다. 그리고 퇴비화는 퇴비생성을 위한 호기화 과정을 의미한다.Here, compost is a mixture composed of vegetable residues obtained by biodegradation, other organic matter, and soil conditioning organic matter containing certain inorganic components. And composting means an aerobic process for compost production.
하기의 [표 1]은 실험 예 1 및 비교예(비교예 1 내지 비교예 4)의 멀칭 필름의 생분해 후 남은 중량 비율의 변화를 나타낸다. [Table 1] below shows the change in weight ratio remaining after biodegradation of the mulching films of Experimental Example 1 and Comparative Examples (Comparative Examples 1 to 4).
[표 1][Table 1]
상기의 [표 1]과 같이, 본 발명의 일 실시예에 따른 멀칭 필름(실험 예1)은 케나프 분말(100), 탄산칼슘 분말(200), 폴리비닐알콜(300) 및 폴리에틸렌 필름(400)을 포함하고 있기 때문에 시간의 흐름에 따라 멀칭 필름의 생분해 후 남은 중량이 가장 낮았다.As shown in [Table 1], the mulching film according to an embodiment of the present invention (Experimental Example 1) is made of kenaf powder 100, calcium carbonate powder 200, polyvinyl alcohol 300 and polyethylene film 400. ), the remaining weight after biodegradation of the mulching film over time was the lowest.
이에 반하여, 비교예(비교예 1 내지 비교예 4)의 멀칭 필름의 경우 케나프 분말(100), 탄산칼슘 분말(200), 폴리비닐알콜(300) 및 폴리에틸렌 필름(400) 중 적어도 하나를 포함하고 있기 때문에 동일한 생분해 시간 후에 본 발명의 일 실시예에 따른 멀칭 필름(실험 예1)보다 남은 중량이 많았다.In contrast, in the case of the mulching films of Comparative Examples (Comparative Examples 1 to 4), at least one of kenaf powder 100, calcium carbonate powder 200, polyvinyl alcohol 300, and polyethylene film 400 was included. Because of this, the remaining weight was greater than that of the mulching film (Experimental Example 1) according to an embodiment of the present invention after the same biodegradation time.
상기와 같은 실험을 통해 본 발명의 일 실시예에 따른 멀칭 필름(실험 예1)의 생분해 속도가 가장 빠르다는 것을 확인할 수 있었다. Through the above experiments, it was confirmed that the biodegradation rate of the mulching film (Experimental Example 1) according to an embodiment of the present invention was the fastest.
또한, 하기의 [표 2]를 참조하여 실험 예 1 및 비교예(비교예 1 내지 비교예 4)의 멀칭 필름을 호기성 퇴비화 조건에서 생분해도를 측정하기 위해서 멀칭 비닐에 구멍이 생기는 속도를 비교하여 설명하기로 한다. In addition, in order to measure the biodegradability of the mulching films of Experimental Example 1 and Comparative Examples (Comparative Examples 1 to 4) with reference to [Table 2] below, the rate of hole formation in the mulching vinyl was compared to Let's explain.
하기의 [표 2]은 실험 예 1 및 비교예(비교예 1 내지 비교예 4)의 멀칭 필름에 구멍이 생성되기 시작한 기간을 나타내는 표이다.[Table 2] below is a table showing the period during which holes started to be formed in the mulching films of Experimental Example 1 and Comparative Examples (Comparative Examples 1 to 4).
[표 2][Table 2]
상기의 [표 2]과 같이, 본 발명의 일 실시예에 따른 멀칭 필름(실험 예1)은 케나프 분말(100), 탄산칼슘 분말(200), 폴리비닐알콜(300) 및 폴리에틸렌 필름(400)을 포함하고 있기 때문에 폴리비닐알콜(300)에 의해 폴리에틸렌 필름(400)이 녹아 멀칭 필름에 구멍이 생성되는 시간이 가장 빠르다는 사실을 확인할 수 있었다.As shown in [Table 2], the mulching film according to an embodiment of the present invention (Experimental Example 1) is made of kenaf powder 100, calcium carbonate powder 200, polyvinyl alcohol 300 and polyethylene film 400. ), it was confirmed that the time at which the polyethylene film 400 was melted by the polyvinyl alcohol 300 and holes were formed in the mulching film was the fastest.
이에 반하여, 비교예(비교예 1 내지 비교예 4)의 멀칭 필름의 경우 폴리비닐알콜(300)을 포함하고 있지 않기 때문에 폴리에틸렌 필름(400)을 녹이지 못해 멀칭 필름에 구멍이 생기는데 두 배 이상의 시간이 소요된다는 사실을 확인할 수 있었다.In contrast, in the case of the mulching films of Comparative Examples (Comparative Examples 1 to 4), since they do not contain polyvinyl alcohol 300, the polyethylene film 400 cannot be melted and holes are formed in the mulching film, which takes more than twice as long. It was confirmed that this was required.
이하에서는, 도 5 내지 도 7을 참조하여 본 발명의 일 실시예에 따른 멀칭 필름(실험 예1)의 생분해 과정을 설명하기로 한다. Hereinafter, the biodegradation process of the mulching film (Experimental Example 1) according to an embodiment of the present invention will be described with reference to FIGS. 5 to 7 .
먼저, 도 5의 참조번호(a)와 같이 멀칭 필름은 케나프 분말(100), 탄산칼슘 분말(200), 폴리비닐알콜(300) 및 폴리에틸렌 필름(400)을 포함하고 있으며, 멀칭 필름이 퇴비화되는 과정에서 도 5의 참조번호(b)와 같이 폴리비닐알콜(300)에 의해 폴리에틸렌 필름(400)이 녹아 멀칭 필름에 구멍(500)이 생기게 된다. First, as shown in reference number (a) of FIG. 5, the mulching film includes kenaf powder 100, calcium carbonate powder 200, polyvinyl alcohol 300, and polyethylene film 400, and the mulching film is compostable. In the process, as shown in reference numeral (b) of FIG. 5, the polyethylene film 400 is melted by the polyvinyl alcohol 300, and holes 500 are formed in the mulching film.
또한, 도 6의 참조번호(a)와 같이 멀칭 필름은 케나프 분말(100), 탄산칼슘 분말(200), 폴리비닐알콜(300) 및 폴리에틸렌 필름(400)을 포함하고 있으며, 멀칭 필름이 퇴비화되는 과정에서 도 6의 참조번호(a)와 같이 폴리비닐알콜(300)에 의해 폴리에틸렌 필름(400)이 녹아 멀칭 필름에 구멍(500)이 생기게 되며, 도 6의 참조번호 (c)와 같이 폴리비닐알콜(300)에 의해 폴리에틸렌 필름(400)이 약해져 케나프 분말(100) 및 탄산칼슘 분말(200)이 멀칭 필름의 표면에 노출된다.In addition, as shown in reference number (a) of FIG. 6, the mulching film includes kenaf powder 100, calcium carbonate powder 200, polyvinyl alcohol 300, and polyethylene film 400, and the mulching film is compostable. In the process, as shown in reference number (a) in FIG. 6, the polyethylene film 400 is melted by the polyvinyl alcohol 300, and holes 500 are formed in the mulching film, and as shown in reference number (c) in FIG. The polyethylene film 400 is weakened by the vinyl alcohol 300, so that the kenaf powder 100 and the calcium carbonate powder 200 are exposed on the surface of the mulching film.
그 후, 도 6의 참조번호 (d)와 같이 멀칭 필름의 표면에 노출된 케나프 분말(100)의 바실러스 효모를 통해 폴리비닐알콜(300)을 분해할 수 있고, 농업용으로 사용시 비료로 대체가 가능하다. 또한, 도 6의 참조번호 (d)와 같이 멀칭 필름의 표면에 노출된 탄산칼슘 분말(200)을 이용함으로써 멀칭 필름을 폐기를 위해 토양에 매립하더라도 토양에서 잘 덮여있도록 무게를 가지게하며, 멀칭 필름의 분해를 촉진시킬 수 있다.After that, as shown in reference number (d) of FIG. 6, the polyvinyl alcohol 300 can be decomposed through the Bacillus yeast of the kenaf powder 100 exposed on the surface of the mulching film, and can be replaced with fertilizer when used for agricultural purposes. possible. In addition, by using the calcium carbonate powder 200 exposed on the surface of the mulching film as shown in reference number (d) of FIG. 6, even if the mulching film is buried in the soil for disposal, it has weight so that it is well covered in the soil, and the mulching film can accelerate the decomposition of
또한, 도 7의 참조번호(a)와 같이 멀칭 필름은 케나프 분말(100), 탄산칼슘 분말(200), 폴리비닐알콜(300) 및 폴리에틸렌 필름(400)을 포함하고 있으며, 멀칭 필름이 퇴비화되는 과정에서 도 7의 참조번호(b)와 같이 폴리비닐알콜(300)에 의해 폴리에틸렌 필름(400)이 녹아 멀칭 필름에 구멍(500)이 생기게 된다. In addition, as shown in reference number (a) of FIG. 7, the mulching film includes kenaf powder 100, calcium carbonate powder 200, polyvinyl alcohol 300, and polyethylene film 400, and the mulching film is compostable. In the process, as shown in reference numeral (b) of FIG. 7, the polyethylene film 400 is melted by the polyvinyl alcohol 300, and holes 500 are formed in the mulching film.
한정된 실시예와 도면에 의해 설명되었으나, 본 발명은 상기의 실시예에 한정되는 것은 아니며, 이는 본 발명이 속하는 분야에서 통상의 지식을 가진 자라면 이러한 기재로부터 다양한 수정 및 변형이 가능하다. 따라서, 본 발명 사상은 아래에 기재된 특허청구범위에 의해서만 파악되어야 하고, 이의 균등 또는 등가적 변형 모두는 본 발명 사상의 범주에 속한다고 할 것이다.Although described by the limited embodiments and drawings, the present invention is not limited to the above embodiments, and those skilled in the art can make various modifications and variations from these descriptions. Therefore, the spirit of the present invention should be grasped only by the claims described below, and all equivalent or equivalent modifications thereof will be said to belong to the scope of the spirit of the present invention.
100: 케나프 분말
200: 탄산칼슘 분말
300: 폴리비닐알콜
400: 폴리에틸렌 필름
500: 폴리비닐알콜에 의해 생성된 구멍100: kenaf powder
200: calcium carbonate powder
300: polyvinyl alcohol
400: polyethylene film
500: hole created by polyvinyl alcohol
Claims (3)
상기 폴리비닐알콜을 가수 분해하여 폴리비닐알콜 수용액을 제조하는 단계;
상기 케나프 분말, 탄산칼슘 분말 및 폴리에틸렌 분말을 상기 폴리비닐알콜 수용액에 혼합하여 생분해성 화합물을 제조하는 단계; 및
상기 생분해성 화합물을 가공한 후 압출하여 멀칭 필름을 제조하는 단계를 포함하는 것을 특징으로 하는
멀칭 필름 제조 방법.
Preparing kenaf powder, calcium carbonate powder, polyvinyl alcohol (PVA), and polyethylene powder;
preparing a polyvinyl alcohol aqueous solution by hydrolyzing the polyvinyl alcohol;
preparing a biodegradable compound by mixing the kenaf powder, calcium carbonate powder, and polyethylene powder with the polyvinyl alcohol aqueous solution; and
Characterized in that it comprises the step of producing a mulching film by extruding after processing the biodegradable compound
Method of making mulching film.
상기 폴리비닐알콜을 가수 분해하여 폴리비닐알콜 수용액을 제조하는 단계는
상기 폴리비닐알콜 15~25 중량%에 증류수 24~50 중량%를 혼합하여, 30~55℃로 가수 분해하여 폴리비닐알콜 수용액을 제조하는 단계를 포함하는 것을 특징으로 하는
멀칭 필름 제조 방법.
According to claim 1,
The step of hydrolyzing the polyvinyl alcohol to prepare a polyvinyl alcohol aqueous solution
Mixing 24 to 50% by weight of distilled water with 15 to 25% by weight of polyvinyl alcohol and hydrolyzing at 30 to 55 ° C. to prepare an aqueous solution of polyvinyl alcohol
Method of making mulching film.
상기 케나프 분말, 탄산칼슘 분말 및 폴리에틸렌 분말을 상기 폴리비닐알콜 수용액에 혼합하여 생분해성 화합물을 제조하는 단계는
상기 케나프 분말 15 ~ 25 중량%, 탄산칼슘 분말 15 ~ 25 중량% 및 폴리에틸렌 분말 15 ~ 25 중량%를 상기 폴리비닐알콜 수용액에 혼합하여 생분해성 화합물을 제조하는 단계를 포함하는 것을 특징으로 하는
멀칭 필름 제조 방법.According to claim 1,
The step of preparing a biodegradable compound by mixing the kenaf powder, calcium carbonate powder, and polyethylene powder with the polyvinyl alcohol aqueous solution
Preparing a biodegradable compound by mixing 15 to 25% by weight of the kenaf powder, 15 to 25% by weight of calcium carbonate powder, and 15 to 25% by weight of polyethylene powder in the polyvinyl alcohol aqueous solution.
Method of making mulching film.
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