KR102515426B1 - Biodegradable Mulching Film Composition - Google Patents
Biodegradable Mulching Film Composition Download PDFInfo
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- KR102515426B1 KR102515426B1 KR1020220072443A KR20220072443A KR102515426B1 KR 102515426 B1 KR102515426 B1 KR 102515426B1 KR 1020220072443 A KR1020220072443 A KR 1020220072443A KR 20220072443 A KR20220072443 A KR 20220072443A KR 102515426 B1 KR102515426 B1 KR 102515426B1
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- fatty acid
- ester compound
- chain fatty
- molecular weight
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- 239000000203 mixture Substances 0.000 title claims abstract description 31
- -1 ester compounds Chemical class 0.000 claims abstract description 49
- 229920002988 biodegradable polymer Polymers 0.000 claims abstract description 29
- 239000004621 biodegradable polymer Substances 0.000 claims abstract description 29
- 229920008262 Thermoplastic starch Polymers 0.000 claims abstract description 24
- 239000004628 starch-based polymer Substances 0.000 claims abstract description 24
- 239000000654 additive Substances 0.000 claims abstract description 19
- 230000000996 additive effect Effects 0.000 claims abstract description 14
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 11
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 11
- 125000004432 carbon atom Chemical group C* 0.000 claims description 14
- 239000005014 poly(hydroxyalkanoate) Substances 0.000 claims description 12
- 229920000903 polyhydroxyalkanoate Polymers 0.000 claims description 12
- 150000004668 long chain fatty acids Chemical class 0.000 claims description 10
- 150000004666 short chain fatty acids Chemical class 0.000 claims description 10
- 229920001896 polybutyrate Polymers 0.000 claims description 7
- 239000004626 polylactic acid Substances 0.000 claims description 6
- JQYSLXZRCMVWSR-UHFFFAOYSA-N 1,6-dioxacyclododecane-7,12-dione;terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1.O=C1CCCCC(=O)OCCCCO1 JQYSLXZRCMVWSR-UHFFFAOYSA-N 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 239000004629 polybutylene adipate terephthalate Substances 0.000 claims description 4
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 2
- KDYFGRWQOYBRFD-UHFFFAOYSA-L succinate(2-) Chemical compound [O-]C(=O)CCC([O-])=O KDYFGRWQOYBRFD-UHFFFAOYSA-L 0.000 claims 1
- 235000014113 dietary fatty acids Nutrition 0.000 abstract description 5
- 229930195729 fatty acid Natural products 0.000 abstract description 5
- 239000000194 fatty acid Substances 0.000 abstract description 5
- 150000004665 fatty acids Chemical class 0.000 abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 13
- 208000037534 Progressive hemifacial atrophy Diseases 0.000 description 5
- UQLDLKMNUJERMK-UHFFFAOYSA-L di(octadecanoyloxy)lead Chemical compound [Pb+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O UQLDLKMNUJERMK-UHFFFAOYSA-L 0.000 description 5
- 238000012017 passive hemagglutination assay Methods 0.000 description 5
- 239000002689 soil Substances 0.000 description 5
- NQZRDXDTNFGVMK-UHFFFAOYSA-N 1,6-dioxecane-2,5-dione;terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1.O=C1CCC(=O)OCCCCO1 NQZRDXDTNFGVMK-UHFFFAOYSA-N 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 239000004631 polybutylene succinate Substances 0.000 description 3
- 229920002961 polybutylene succinate Polymers 0.000 description 3
- ZMKVBUOZONDYBW-UHFFFAOYSA-N 1,6-dioxecane-2,5-dione Chemical compound O=C1CCC(=O)OCCCCO1 ZMKVBUOZONDYBW-UHFFFAOYSA-N 0.000 description 2
- DEXFNLNNUZKHNO-UHFFFAOYSA-N 6-[3-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperidin-1-yl]-3-oxopropyl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1CCN(CC1)C(CCC1=CC2=C(NC(O2)=O)C=C1)=O DEXFNLNNUZKHNO-UHFFFAOYSA-N 0.000 description 2
- VCUFZILGIRCDQQ-KRWDZBQOSA-N N-[[(5S)-2-oxo-3-(2-oxo-3H-1,3-benzoxazol-6-yl)-1,3-oxazolidin-5-yl]methyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C1O[C@H](CN1C1=CC2=C(NC(O2)=O)C=C1)CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F VCUFZILGIRCDQQ-KRWDZBQOSA-N 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 208000034530 PLAA-associated neurodevelopmental disease Diseases 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 244000037666 field crops Species 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000003244 pro-oxidative effect Effects 0.000 description 1
- 238000004162 soil erosion Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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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
- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
- C08L3/02—Starch; Degradation products thereof, e.g. dextrin
-
- 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—Protecting plants
- A01G13/02—Protective coverings for plants; Coverings for the ground; Devices for laying-out or removing coverings
- A01G13/0256—Ground coverings
- A01G13/0268—Mats or sheets, e.g. nets or fabrics
- A01G13/0275—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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/16—Compositions of unspecified macromolecular compounds the macromolecular compounds being biodegradable
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Biological Depolymerization Polymers (AREA)
Abstract
Description
본 발명은 생분해성 멀칭필름 조성물에 관한 것으로, 더욱 상세하게는 인강강도 및 연신율이 우수하면서 우수한 생분해성을 갖는 멀칭필름을 형성하기 위한 생분해성 멀칭필름 조성물의 조합에 관한 것이다.The present invention relates to a biodegradable mulching film composition, and more particularly, to a combination of biodegradable mulching film compositions for forming a mulching film having excellent biodegradability and excellent tensile strength and elongation.
여기서는, 본 개시에 관한 배경기술이 제공되며, 이들이 반드시 공지기술을 의미하는 것은 아니다.BACKGROUND OF THE INVENTION Here, background art related to the present disclosure is provided, and they are not necessarily meant to be prior art.
농업용 멀칭(mulching) 필름은 농작물을 재배할 때 밭고랑과 같은 농작물 재배지의 표면을 덮어주는 필름으로서, 일반적으로 폴리에틸렌 또는 폴리염화비닐 등과 같은 재질로 이루어진다. 이러한 농업용 멀칭 필름은 농작물 재배지의 잡초 발생을 억제하거나, 토양의 수분 유지 또는 지온 조절을 위하여 사용되며, 또한 우천시 빗물에 의해 토양이 침식되는 것을 방지하거나, 농작물의 생장에 알맞은 최적 환경을 조성해주기 위한 목적으로 사용된다.A mulching film for agriculture is a film that covers the surface of crop fields such as furrows when crops are grown, and is generally made of a material such as polyethylene or polyvinyl chloride. This agricultural mulching film is used to suppress the occurrence of weeds in crop fields, to maintain moisture in the soil or to control the geothermal temperature, and to prevent soil erosion by rainwater in case of rain or to create an optimal environment suitable for the growth of crops. used for a purpose
농업용 멀칭 필름은 효율적인 밭작물 재배에 꼭 필요하지만 작물이 어느 정도 성장하면 땅에 피복되어있는 필름을 제거해야 하는 번거로움이 있다. 또한, 고령화된 농촌사회에서 땅에 묻혀 있는 필름을 제거하기가 힘들고 필름 제거 작업을 할 수 있는 농기계도 없어 필름이 방치되어 미관상 좋지 않을 뿐만 아니라 환경오염을 일으키고 다음해 작물 재배 시 큰 걸림돌이 되고 있다. 이와 같은 문제점을 해결하기 위해 전 세계적으로 흙속에서 생분해되어 없어지는 생분해성 멀칭 필름의 개발이 활발히 진행되고 있다.Agricultural mulching film is essential for efficient cultivation of field crops, but it is cumbersome to remove the film covering the ground when the crop grows to a certain extent. In addition, it is difficult to remove the film buried in the ground in an aging rural society and there is no agricultural machine capable of removing the film, so the film is left unattended and not only aesthetically pleasing, but also causes environmental pollution and becomes a major obstacle to crop cultivation the following year. . In order to solve this problem, the development of biodegradable mulching films that are biodegradable and disappear in the soil is being actively conducted all over the world.
본 발명은 인강강도 및 연신율이 우수하면서 우수한 생분해성을 갖는 멀칭필름을 형성하기 위한 생분해성 멀칭필름 조성물의 조합을 제공하고자 한다. An object of the present invention is to provide a combination of biodegradable mulching film compositions for forming a mulching film having excellent tensile strength and elongation and excellent biodegradability.
그러나 본 발명의 목적들은 상기에 언급된 목적으로 제한되지 않으며, 언급되지 않은 또 다른 목적들은 아래의 기재로부터 당업자에게 명확하게 이해될 수 있을 것이다.However, the objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned will be clearly understood by those skilled in the art from the description below.
본 발명은 생분해성 고분자 60 내지 70 wt%; 열가소성 전분(Thermoplastic starch; TPS) 15 내지 25 wt%; 산화방지제 3 내지 8 wt%; 및 첨가제 5 내지 15 wt%;를 포함하고, 상기 생분해성 고분자는 수평균분자량(Mn)이 상이한 2종 이상을 혼합하여 포함하며, 상기 열가소성 전분은 수분함량이 4~7wt% 이고, 상기 첨가제는 탄소수가 상이한 지방산의 에스테르 화합물 2종 이상을 혼합하여 포함하는 생분해성 멀칭필름 제1 조성물을 제공한다.The present invention is a biodegradable polymer 60 to 70 wt%; 15 to 25 wt% of thermoplastic starch (TPS); 3 to 8 wt% of an antioxidant; and 5 to 15 wt% of an additive, wherein the biodegradable polymer includes a mixture of two or more types having different number average molecular weights (Mn), and the thermoplastic starch has a moisture content of 4 to 7 wt%, and the additive comprises Provided is a first biodegradable mulching film composition comprising a mixture of two or more kinds of ester compounds of fatty acids having different carbon numbers.
또한 본 발명은 생분해성 고분자 30 내지 40 wt%; 열가소성 전분(Thermoplastic starch; TPS) 50 내지 60 wt%; 산화촉진제 3 내지 8 wt%; 및 첨가제 3 내지 8 wt%;를 포함하고, 상기 생분해성 고분자는 수평균분자량(Mn)이 상이한 2종 이상을 혼합하여 포함하며, 상기 열가소성 전분은 수분함량이 1~3wt% 이고, 상기 첨가제는 탄소수가 상이한 지방산의 에스테르 화합물 2종 이상을 혼합하여 포함하는 생분해성 멀칭필름 제2 조성물을 제공한다. In addition, the present invention is a biodegradable polymer 30 to 40 wt%; 50 to 60 wt% of thermoplastic starch (TPS); 3 to 8 wt% of an oxidation promoter; and 3 to 8 wt% of an additive, wherein the biodegradable polymer includes a mixture of two or more types having different number average molecular weights (Mn), the thermoplastic starch has a moisture content of 1 to 3 wt%, and the additive comprises Provided is a second biodegradable mulching film composition comprising a mixture of two or more kinds of ester compounds of fatty acids having different carbon numbers.
또한 상기 생분해성 고분자는 수평균분자량(Mn)이 10,000~50,000 g/mol 인 저분자량 생분해성 고분자 및 80,000~200,000 g/mol 인 고분자량 생분해성 고분자를 혼합하여 포함한다.In addition, the biodegradable polymer includes a mixture of a low molecular weight biodegradable polymer having a number average molecular weight (Mn) of 10,000 to 50,000 g/mol and a high molecular weight biodegradable polymer having 80,000 to 200,000 g/mol.
또한 상기 첨가제는 탄소수 12개 초과인 긴사슬지방산의 에스테르 화합물 및 탄소수 6개 미만인 짧은사슬지방산의 에스테르 화합물을 포함한다.In addition, the additive includes an ester compound of a long chain fatty acid having more than 12 carbon atoms and an ester compound of a short chain fatty acid having less than 6 carbon atoms.
본 발명은 인강강도 및 연신율이 우수하면서 우수한 생분해성을 갖는 생분해성 멀칭필름 조성물의 조합을 제공한다. The present invention provides a combination of a biodegradable mulching film composition having excellent strength and elongation and excellent biodegradability.
본 명세서에 사용되는 모든 기술용어 및 과학용어는 다른 언급이 없는 한은 기술적으로 통상의 기술을 가진 자에게 일반적으로 이해되는 것과 동일한 의미를 가진다. 또한 본 명세서 및 청구범위의 전반에 걸쳐, 다른 언급이 없는 한 포함(comprise, comprises, comprising)이라는 용어는 언급된 물건, 단계 또는 일군의 물건, 및 단계를 포함하는 것을 의미하고, 임의의 어떤 다른 물건, 단계 또는 일군의 물건 또는 일군의 단계를 배제하는 의미로 사용된 것은 아니다.All technical and scientific terms used herein have the same meaning as commonly understood by a person of ordinary skill in the art unless otherwise specified. Also throughout this specification and claims, the terms "comprise", "comprising", and "comprising", unless stated otherwise, are meant to include a stated object, step or group of objects, and steps, and any other It is not intended to exclude an object, step or group of objects or steps.
이하에 본 발명을 상세하게 설명하기에 앞서, 본 명세서에 사용된 용어는 특정의 실시예를 기술하기 위한 것일 뿐 첨부하는 특허청구의 범위에 의해서만 한정되는 본 발명의 범위를 한정하려는 것은 아님을 이해하여야 한다.Prior to describing the present invention in detail below, it is understood that the terms used herein are intended to describe specific embodiments and are not intended to limit the scope of the present invention, which is limited only by the appended claims. shall.
한편, 본 발명의 여러 가지 실시예들은 명확한 반대의 지적이 없는 한 그 외의 어떤 다른 실시예들과 결합될 수 있다. 특히 바람직하거나 유리하다고 지시하는 어떤 특징도 바람직하거나 유리하다고 지시한 그 외의 어떤 특징 및 특징들과 결합될 수 있다. 이하, 첨부된 도면을 참조하여 본 발명의 실시예 및 이에 따른 효과를 설명하기로 한다.On the other hand, various embodiments of the present invention can be combined with any other embodiments unless clearly indicated to the contrary. Any feature indicated as being particularly desirable or advantageous may be combined with any other features and characteristics indicated as being particularly desirable or advantageous. Hereinafter, embodiments of the present invention and effects thereof will be described with reference to the accompanying drawings.
본 발명의 일실시예에 따른 생분해성 멀칭필름은 제1 필름 및 제2 필름을 포함하는 이중필름으로 구성되며, 제1 필름은 제1 조성물로 형성되고, 제2 필름은 제2 조성물로 형성된다. 상기 생분해성 멀칭필름은 토양을 피복할 때 제1 필름이 토양에 맞닿는 아랫방향으로 향하고, 제2 필름이 외부에 맞닿는 윗방향으로 향하도록 피복된다. 상기 제1 필름 및 제2 필름의 두께는 각각 5 내지 10μm 로 형성된다. The biodegradable mulching film according to an embodiment of the present invention is composed of a double film including a first film and a second film, the first film is formed of a first composition, and the second film is formed of a second composition. . The biodegradable mulching film is coated so that when covering the soil, the first film faces downward to contact the soil, and the second film faces upward to contact the outside. The first film and the second film each have a thickness of 5 to 10 μm.
본 발명의 일실시예에 따른 생분해성 멀칭필름용 제1 조성물은 생분해성 고분자 60 내지 70 wt%, 열가소성 전분(Thermoplastic starch; TPS) 15 내지 25 wt%, 산화방지제 3 내지 8 wt% 및 첨가제 5 내지 15 wt%를 포함하며, 이 때 생분해성 고분자는 수평균분자량(Mn)이 상이한 2종 이상을 혼합하여 포함하며, 상기 열가소성 전분은 수분함량이 4~7wt% 이고, 상기 첨가제는 탄소수가 상이한 지방산의 에스테르 화합물 2종 이상을 혼합하여 포함한다.The first composition for a biodegradable mulching film according to an embodiment of the present invention includes 60 to 70 wt% of a biodegradable polymer, 15 to 25 wt% of thermoplastic starch (TPS), 3 to 8 wt% of an antioxidant, and 5 additives. to 15 wt%, wherein the biodegradable polymer includes a mixture of two or more types having different number average molecular weights (Mn), the thermoplastic starch has a moisture content of 4 to 7 wt%, and the additive has a different number of carbon atoms Two or more kinds of ester compounds of fatty acids are mixed and included.
상기 생분해성 고분자는 폴리락틱산(Polylactic acid, PLA), 폴리하이드록시 알카노에이트[Poly(hydroxy alkanoate), PHA], 폴리부틸렌 아디페이트 테레프탈레이트[Poly(butylene adipate terephthalate), PBAT], 폴리부틸렌 숙시네이트[Poly(butylene succinate), PBS], 폴리부틸렌에틸렌 아디페이트 숙시네이트-코-테레프탈레이트[Poly(butylene ethylene adipate succinate-co-terephthalate), PBEAST] 및 폴리부틸렌숙시네이트 테레프탈레이트[Poly(butylene succinate terephthalate), PBST]로 이루어진 군에서 선택된 1종 이상을 포함한다. The biodegradable polymer is polylactic acid (PLA), polyhydroxy alkanoate [Poly (hydroxy alkanoate), PHA], polybutylene adipate terephthalate [Poly (butylene adipate terephthalate), PBAT], poly Butylene succinate [Poly(butylene succinate), PBS], polybutylene ethylene adipate succinate-co-terephthalate [Poly(butylene ethylene adipate succinate-co-terephthalate), PBEAST] and polybutylene succinate terephthalate It includes at least one selected from the group consisting of [Poly (butylene succinate terephthalate), PBST].
상기 생분해성 고분자는 수평균분자량(Mn)이 상이한 2종 이상을 혼합하여 사용하는데, 더욱 구체적으로 수평균분자량(Mn)이 10,000~50,000 g/mol 인 저분자량 생분해성 고분자 및 80,000~200,000 g/mol 인 고분자량 생분해성 고분자를 혼합한다. 이 때 저분자량 생분해성 고분자 및 고분자량 생분해성 고분자의 혼합 비율은 1:0.5~0.8 이다. The biodegradable polymer is used by mixing two or more species having different number average molecular weight (Mn), more specifically, a low molecular weight biodegradable polymer having a number average molecular weight (Mn) of 10,000 to 50,000 g/mol and 80,000 to 200,000 g/mol. mol high molecular weight biodegradable polymer is mixed. At this time, the mixing ratio of the low molecular weight biodegradable polymer and the high molecular weight biodegradable polymer is 1:0.5 to 0.8.
바람직하게는 수평균분자량(Mn)이 10,000~50,000 g/mol 인 폴리락틱산(Polylactic acid, PLA) 및 폴리하이드록시 알카노에이트[Poly(hydroxy alkanoate), PHA] 중 1종 이상과 수평균분자량(Mn)이 80,000~200,000 g/mol 인 폴리부틸렌 아디페이트 테레프탈레이트[Poly(butylene adipate terephthalate), PBAT], 폴리부틸렌 숙시네이트[Poly(butylene succinate), PBS], 폴리부틸렌에틸렌 아디페이트 숙시네이트-코-테레프탈레이트[Poly(butylene ethylene adipate succinate-co-terephthalate), PBEAST] 및 폴리부틸렌숙시네이트 테레프탈레이트[Poly(butylene succinate terephthalate), PBST] 중 1종 이상을 혼합하는 것이 좋다. Preferably, at least one of polylactic acid (PLA) and polyhydroxy alkanoate [Poly(hydroxy alkanoate), PHA] having a number average molecular weight (Mn) of 10,000 to 50,000 g/mol and a number average molecular weight (Mn) 80,000 ~ 200,000 g / mol polybutylene adipate terephthalate [Poly (butylene adipate terephthalate), PBAT], polybutylene succinate [Poly (butylene succinate), PBS], polybutylene ethylene adipate It is preferable to mix at least one of succinate-co-terephthalate [Poly (butylene ethylene adipate succinate-co-terephthalate), PBEAST] and polybutylene succinate terephthalate [Poly (butylene succinate terephthalate), PBST].
상기 열가소성 전분은 수분함량이 4~7wt% 인 것을 사용하여 제2 필름에 비하여 상대적으로 높은 수분함량을 가짐으로써 제2 필름에 비하여 상대적으로 높은 수분통기성 및 생분해성을 가지며 이중필름 전체로서 적절한 수분통기성 및 생분해성을 가진다. The thermoplastic starch has a relatively high moisture content compared to the second film by using a moisture content of 4 to 7 wt%, so that it has relatively high moisture permeability and biodegradability compared to the second film. Adequate moisture permeability as a whole double film and biodegradable.
상기 산화방지제는 페놀계 산화방지제 및 인계 산화방지제 중 1종 이상을 포함한다. The antioxidant includes at least one of a phenol-based antioxidant and a phosphorus-based antioxidant.
상기 첨가제는 탄소수 12개 초과인 긴사슬지방산의 에스테르 화합물 및 탄소수 6개 미만인 짧은사슬지방산의 에스테르 화합물을 포함하며, 이 때 긴사슬지방산의 에스테르 화합물 및 짧은사슬지방산의 에스테르 화합물의 혼합 비율은 1:0.5~0.8이다. The additive includes an ester compound of a long chain fatty acid having more than 12 carbon atoms and an ester compound of a short chain fatty acid having less than 6 carbon atoms, wherein the mixing ratio of the ester compound of the long chain fatty acid and the ester compound of the short chain fatty acid is 1: It is 0.5-0.8.
본 발명의 일실시예에 따른 생분해성 멀칭필름용 제2 조성물은 생분해성 고분자 30 내지 40 wt%, 열가소성 전분(Thermoplastic starch; TPS) 50 내지 60 wt%, 산화촉진제 3 내지 8 wt% 및 첨가제 3 내지 8 wt%를 포함하며, 이 때 생분해성 고분자는 수평균분자량(Mn)이 상이한 2종 이상을 혼합하여 포함하며, 상기 열가소성 전분은 수분함량이 1~3wt% 이고, 상기 첨가제는 탄소수가 상이한 지방산의 에스테르 화합물 2종 이상을 혼합하여 포함한다.The second composition for a biodegradable mulching film according to an embodiment of the present invention includes 30 to 40 wt% of a biodegradable polymer, 50 to 60 wt% of thermoplastic starch (TPS), 3 to 8 wt% of an oxidation promoter, and 3 additives. to 8 wt%, wherein the biodegradable polymer includes a mixture of two or more types having different number average molecular weights (Mn), the thermoplastic starch has a moisture content of 1 to 3 wt%, and the additive has a different number of carbon atoms Two or more kinds of ester compounds of fatty acids are mixed and included.
상기 생분해성 고분자는 수평균분자량(Mn)이 상이한 2종 이상을 혼합하여 사용하는데, 더욱 구체적으로 수평균분자량(Mn)이 10,000~50,000 g/mol 인 저분자량 생분해성 고분자 및 80,000~200,000 g/mol 인 고분자량 생분해성 고분자를 혼합한다. 이 때 저분자량 생분해성 고분자 및 고분자량 생분해성 고분자의 혼합 비율은 1:1.2~1.5 이다. The biodegradable polymer is used by mixing two or more species having different number average molecular weight (Mn), more specifically, a low molecular weight biodegradable polymer having a number average molecular weight (Mn) of 10,000 to 50,000 g/mol and 80,000 to 200,000 g/mol. mol high molecular weight biodegradable polymer is mixed. At this time, the mixing ratio of the low molecular weight biodegradable polymer and the high molecular weight biodegradable polymer is 1:1.2 to 1.5.
바람직하게는 수평균분자량(Mn)이 10,000~50,000 g/mol 인 폴리락틱산(Polylactic acid, PLA) 및 폴리하이드록시 알카노에이트[Poly(hydroxy alkanoate), PHA] 중 1종 이상과 수평균분자량(Mn)이 80,000~200,000 g/mol 인 폴리부틸렌 아디페이트 테레프탈레이트[Poly(butylene adipate terephthalate), PBAT], 폴리부틸렌 숙시네이트[Poly(butylene succinate), PBS], 폴리부틸렌에틸렌 아디페이트 숙시네이트-코-테레프탈레이트[Poly(butylene ethylene adipate succinate-co-terephthalate), PBEAST] 및 폴리부틸렌숙시네이트 테레프탈레이트[Poly(butylene succinate terephthalate), PBST] 중 1종 이상을 혼합하는 것이 좋다. Preferably, at least one of polylactic acid (PLA) and polyhydroxy alkanoate [Poly(hydroxy alkanoate), PHA] having a number average molecular weight (Mn) of 10,000 to 50,000 g/mol and a number average molecular weight (Mn) 80,000 ~ 200,000 g / mol polybutylene adipate terephthalate [Poly (butylene adipate terephthalate), PBAT], polybutylene succinate [Poly (butylene succinate), PBS], polybutylene ethylene adipate It is preferable to mix at least one of succinate-co-terephthalate [Poly (butylene ethylene adipate succinate-co-terephthalate), PBEAST] and polybutylene succinate terephthalate [Poly (butylene succinate terephthalate), PBST].
상기 열가소성 전분은 수분함량이 1~3wt% 인 것을 사용하여 제1 필름에 비하여 상대적으로 낮은 수분함량을 가짐으로써 제1 필름에 비하여 상대적으로 낮은 수분통기성 및 생분해성을 가진다. The thermoplastic starch has a relatively low moisture content compared to the first film by using a moisture content of 1 to 3 wt% and has relatively low moisture permeability and biodegradability compared to the first film.
상기 산화촉진제는 2가 전이금속 양이온을 함유하는 화합물을 포함한다. 상기 전이금속 양이온은 예를 들어 Fe2+, Co2+, Ni2+, Cu2+ 등을 포함한다.The oxidation promoter includes a compound containing a divalent transition metal cation. The transition metal cation includes, for example, Fe 2+ , Co 2+ , Ni 2+ , Cu 2+ , and the like.
상기 첨가제는 탄소수 12개 초과인 긴사슬지방산의 에스테르 화합물 및 탄소수 6개 미만인 짧은사슬지방산의 에스테르 화합물을 포함하며, 이 때 긴사슬지방산의 에스테르 화합물 및 짧은사슬지방산의 에스테르 화합물의 혼합 비율은 1:1.5~1.8이다. The additive includes an ester compound of a long chain fatty acid having more than 12 carbon atoms and an ester compound of a short chain fatty acid having less than 6 carbon atoms, wherein the mixing ratio of the ester compound of the long chain fatty acid and the ester compound of the short chain fatty acid is 1: It is 1.5 to 1.8.
본 발명에 따른 생분해성 멀칭필름은 제1 필름 및 제2 필름을 각각 압출 성형한 후 부분 열압착을 통해 제1 필름과 제2 필름을 합지하여 이중필름으로 구성된다. 더욱 구체적으로 생분해성 멀칭필름용 제1 조성물 및 제2 조성물을 각각 제조하고, 각 조성물을 이용하여 100 내지 270 ℃의 온도에서 압출 성형하여 제1 필름 및 제2 필름을 제조한 후, 부분적으로 열 압착을 가하여 제1 필름과 제2 필름을 합지하면서 권취하여 이중필름을 제조한다. The biodegradable mulching film according to the present invention is composed of a double film by extruding the first film and the second film, respectively, and then bonding the first film and the second film through partial thermal compression. More specifically, a first composition and a second composition for a biodegradable mulching film are prepared, respectively, and extrusion molding is performed at a temperature of 100 to 270 ° C using each composition to prepare a first film and a second film, and then partially heated. A double film is prepared by applying compression and winding while laminating the first film and the second film.
실시예 및 비교예Examples and Comparative Examples
하기 표 1에 조성으로 생분해성 멀칭필름용 조성물을 제조하였다. 이 때, PLA 및 PHA는 수평균분자량 10,000~50,000 g/mol인 것을 사용하였으며, PBAT, PBS 및 PBST 는 수평균분자량 80,000~200,000 g/mol인 것을 사용하였다. 열가소성 전분은 함수율이 각각 5wt%, 2wt%인 것을 사용하였다. 산화방지제는 페놀계 산화방지제를 사용하였으며, 산화촉진제는 Fe2+를 함유하는 스테아레이트를 사용하였다. 첨가제는 탄소수 14개의 긴사슬지방산의 에스테르 화합물 및 탄소수 4개의 짧은사슬지방산의 에스테르 화합물을 사용하였다. A composition for a biodegradable mulching film was prepared according to the composition shown in Table 1 below. At this time, PLA and PHA were used with a number average molecular weight of 10,000 to 50,000 g / mol, and PBAT, PBS and PBST were used with a number average molecular weight of 80,000 to 200,000 g / mol. As the thermoplastic starch, those having moisture content of 5wt% and 2wt%, respectively, were used. A phenolic antioxidant was used as the antioxidant, and stearate containing Fe 2+ was used as the antioxidant. As the additive, an ester compound of a long chain fatty acid having 14 carbon atoms and an ester compound of a short chain fatty acid having 4 carbon atoms were used.
고분자biodegradable
polymer
전분thermoplastic
starch
실험예Experimental example
(1) 생분해도 측정(1) Measurement of biodegradability
상기 실시예 및 비교예의 조성물을 이용하여 동일한 조건으로 5~10μm 두께의 필름을 1m*1m 크기로 각각 제조 및 합지하였고, ISO 14855의 생분해성 측정방법에 준하여 필름을 퇴비가 혼합된 흙에 투입하고 습도 60%, 온도 58±2℃ PH 8.0±1.0 으로 유지하여 관측 결과 완전분해에 소요되는 기간을 측정하여 하기 표 2에 나타내었다.Films having a thickness of 5 to 10 μm were prepared and laminated in a size of 1 m * 1 m under the same conditions using the compositions of Examples and Comparative Examples, respectively, and in accordance with the biodegradability measurement method of ISO 14855, the film was put into soil mixed with compost, Humidity 60%, temperature 58 ± 2 ℃ PH 8.0 ± 1.0 was maintained, and as a result of observation, the period required for complete decomposition was measured and shown in Table 2 below.
(2) 인장강도 및 연신율(2) Tensile strength and elongation
상기 실시예 및 비교예의 조성물을 이용하여 동일한 조건으로 5~10μm 두께의 필름을 1m*1m 크기로 각각 제조 및 합지하였고, KS M 3503의 7.6 인장강도 및 연신율 시험방법에 준하여 필름의 파단 시 멀칭필름의 종방향(MD) 및 횡방향(TD)에서의 인장강도(Kgf/cm2) 및 연신율(%)을 측정하여 하기 표 3에 나타내었다.Films with a thickness of 5 to 10 μm were prepared and laminated in a size of 1 m * 1 m under the same conditions using the compositions of the above examples and comparative examples, respectively, and mulching film when the film is broken according to 7.6 tensile strength and elongation test method of KS M 3503 Tensile strength (Kgf / cm 2 ) and elongation (%) in the machine direction (MD) and transverse direction (TD) of were measured and shown in Table 3 below.
(Kgf/cm2)tensile strength
(Kgf/cm 2 )
(%)elongation rate
(%)
전술한 각 실시예에서 예시된 특징, 구조, 효과 등은 실시예들이 속하는 분야의 통상의 지식을 가지는 자에 의하여 다른 실시예들에 대해서도 조합 또는 변형되어 실시 가능하다. 따라서 이러한 조합과 변형에 관계된 내용들은 본 발명의 범위에 포함되는 것으로 해석되어야 할 것이다.The features, structures, effects, etc. illustrated in each of the above-described embodiments can be combined or modified with respect to other embodiments by those skilled in the art in the field to which the embodiments belong. Therefore, contents related to these combinations and variations should be construed as being included in the scope of the present invention.
Claims (4)
열가소성 전분(Thermoplastic starch; TPS) 15 내지 25 wt%;
산화방지제 3 내지 8 wt%; 및
첨가제 5 내지 15 wt%;를 포함하고,
상기 생분해성 고분자는 수평균분자량 10,000~50,000 g/mol인 폴리락틱산(Polylactic acid, PLA) 및 수평균분자량 80,000~200,000 g/mol인 폴리부틸렌 아디페이트 테레프탈레이트(Poly(butylene adipate terephthalate), PBAT)를 포함하며, 이 때 PLA에 대한 PBAT의 혼합 중량 비율은 1:0.5~0.8 이고,
상기 열가소성 전분은 수분함량이 4~7 wt% 이고,
상기 첨가제는 탄소수 12개 초과인 긴사슬지방산의 에스테르 화합물 및 탄소수 6개 미만인 짧은사슬지방산의 에스테르 화합물을 포함하며, 긴사슬지방산의 에스테르 화합물에 대한 짧은사슬지방산의 에스테르 화합물의 혼합 중량 비율은 1:0.5~0.8 인 생분해성 멀칭필름 조성물.
60 to 70 wt% of a biodegradable polymer;
15 to 25 wt% of thermoplastic starch (TPS);
3 to 8 wt% of an antioxidant; and
5 to 15 wt% of additives;
The biodegradable polymer is polylactic acid (PLA) having a number average molecular weight of 10,000 to 50,000 g/mol and polybutylene adipate terephthalate having a number average molecular weight of 80,000 to 200,000 g/mol (Poly (butylene adipate terephthalate), PBAT), wherein the mixing weight ratio of PBAT to PLA is 1:0.5 to 0.8,
The thermoplastic starch has a moisture content of 4 to 7 wt%,
The additive includes an ester compound of a long chain fatty acid having more than 12 carbon atoms and an ester compound of a short chain fatty acid having less than 6 carbon atoms, and the mixing weight ratio of the ester compound of the short chain fatty acid to the ester compound of the long chain fatty acid is 1: 0.5 ~ 0.8 biodegradable mulching film composition.
열가소성 전분(Thermoplastic starch; TPS) 50 내지 60 wt%;
산화촉진제 3 내지 8 wt%; 및
첨가제 3 내지 8 wt%;를 포함하고,
상기 생분해성 고분자는 수평균분자량 10,000~50,000 g/mol인 폴리하이드록시 알카노에이트(Poly(hydroxy alkanoate), PHA), 수평균분자량 80,000~200,000 g/mol인 폴리부틸렌 숙시네이트(Poly(butylene succinate), PBS) 및 수평균분자량 80,000~200,000 g/mol인 폴리부틸렌숙시네이트 테레프탈레이트(Poly(butylene succinate terephthalate), PBST)를 포함하며, 이 때 PHA에 대한 PBS 및 PBST의 혼합 중량 비율은 1:1.2~1.5 이고,
상기 열가소성 전분은 수분함량이 1~3 wt% 이고,
상기 첨가제는 탄소수 12개 초과인 긴사슬지방산의 에스테르 화합물 및 탄소수 6개 미만인 짧은사슬지방산의 에스테르 화합물을 포함하며, 긴사슬지방산의 에스테르 화합물에 대한 짧은사슬지방산의 에스테르 화합물의 혼합 중량 비율은 1:1.5~1.8 인 생분해성 멀칭필름 조성물.30 to 40 wt% of a biodegradable polymer;
50 to 60 wt% of thermoplastic starch (TPS);
3 to 8 wt% of an oxidation promoter; and
3 to 8 wt% of additives;
The biodegradable polymer is poly(hydroxy alkanoate) (PHA) having a number average molecular weight of 10,000 to 50,000 g/mol and poly(butylene succinate) having a number average molecular weight of 80,000 to 200,000 g/mol. succinate), PBS) and polybutylene succinate terephthalate (PBST) having a number average molecular weight of 80,000 to 200,000 g/mol, wherein the mixing weight ratio of PBS and PBST to PHA is 1:1.2 to 1.5,
The thermoplastic starch has a moisture content of 1 to 3 wt%,
The additive includes an ester compound of a long chain fatty acid having more than 12 carbon atoms and an ester compound of a short chain fatty acid having less than 6 carbon atoms, and the mixing weight ratio of the ester compound of the short chain fatty acid to the ester compound of the long chain fatty acid is 1: 1.5 ~ 1.8 biodegradable mulching film composition.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100288054B1 (en) * | 1993-05-10 | 2001-09-17 | 유현식 | Degrading polyolefin resin composition and preparation method thereof |
| KR20160071524A (en) * | 2014-12-11 | 2016-06-22 | 롯데정밀화학 주식회사 | Method for controlling degradation rate of biodegradable resin composition and biodegradable mulching film |
| KR20210111186A (en) * | 2021-07-30 | 2021-09-10 | 씨제이제일제당 (주) | Biodegradable resin composition, biodegradable film and biodegradable articles using same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100288054B1 (en) * | 1993-05-10 | 2001-09-17 | 유현식 | Degrading polyolefin resin composition and preparation method thereof |
| KR20160071524A (en) * | 2014-12-11 | 2016-06-22 | 롯데정밀화학 주식회사 | Method for controlling degradation rate of biodegradable resin composition and biodegradable mulching film |
| KR20210111186A (en) * | 2021-07-30 | 2021-09-10 | 씨제이제일제당 (주) | Biodegradable resin composition, biodegradable film and biodegradable articles using same |
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