KR20150069402A - Paper vessel used polylactic acid coating and manufacturing method thereof - Google Patents

Paper vessel used polylactic acid coating and manufacturing method thereof Download PDF

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KR20150069402A
KR20150069402A KR1020130155758A KR20130155758A KR20150069402A KR 20150069402 A KR20150069402 A KR 20150069402A KR 1020130155758 A KR1020130155758 A KR 1020130155758A KR 20130155758 A KR20130155758 A KR 20130155758A KR 20150069402 A KR20150069402 A KR 20150069402A
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paper
coating
biodegradable
paper container
container
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KR1020130155758A
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Korean (ko)
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김수창
조남섭
김진호
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김수창
김진호
조남섭
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
    • B65D25/14—Linings or internal coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
    • B65D3/28—Other details of walls
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • C09D167/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Biological Depolymerization Polymers (AREA)

Abstract

The present invention relates to a biodegradable paper container and a manufacturing method thereof. As a paper container using biodegradable PLA, isolated from cornstarch, as a costing material is suggested, according to the present invention, the container is good for human body without endocrine disruptors and is easily decomposed by microorganism so an eco-friendly paper container, not polluting the environment, is obtained. Therefore, environmental problems, caused by paper containers, are able to be clearly solved while the container is not harmful for human body and is able to be used for a wide range of purposes as the container does not emit toxic materials even when exposed to a high temperature environment such as an oven or microwave.

Description

생분해성 ＰＬＡ 코팅 종이용기 및 그 제조방법{Paper vessel used polylactic acid coating and manufacturing method thereof}Technical Field [0001] The present invention relates to a biodegradable PLA coated paper container and a method of manufacturing the same,

본 발명은 종이용기 및 그 제조방법에 관한 것으로서, 특히 옥수수전분에서 추출된 생분해성 플라스틱이 코팅되어 친환경적이면서도 인체에 해가 없는 생분해성 PLA 코팅 종이용기 및 그 제조방법에 관한 것이다.
The present invention relates to a paper container and a method of manufacturing the same, and more particularly, to a biodegradable PLA coated paper container coated with a biodegradable plastic extracted from cornstarch and having no environmental impact, and a method of manufacturing the same.

일반적으로 각종 플라스틱 제품의 원료가 되는 합성플라스틱은 가공성, 내구성, 기계적 물성, 대량 생산성이 우수하여 천연소재의 단점을 극복할 수 있는 재질로 각광을 받았다. 상기 플라스틱을 응용한 고분자물질이 개발되어 일상생활에서 없어서는 안 되는 중요한 물품의 소재로 사용되고 있는 것이다. Synthetic plastics, which are generally used as raw materials for various plastic products, have been spotlighted as materials that can overcome the shortcomings of natural materials because of their excellent processability, durability, mechanical properties and mass productivity. A polymer material using the plastic has been developed and is used as a material of an important article which is indispensable in daily life.

그런데, 수많은 플라스틱제품으로 인한 플라스틱 폐기물 등이 전세계환경오염의 주원인으로 밝혀짐에 따라, 플라스틱을 비롯한 각종 고형 폐기물에 의한 환경오염 문제를 해결하기 위하여 매립, 소각, 재생 등의 방법을 강구하기는 하였으나, 그러함에도 마구 버려지는 플라스틱으로 인한 환경문제 자체를 해결할 수는 없는 것이었다.However, since plastic waste caused by many plastic products has been found to be the main cause of environmental pollution around the world, methods of landfilling, incineration and regeneration have been devised in order to solve environmental pollution problems caused by various solid waste including plastics However, it was not able to solve the environmental problems caused by plastic that was thrown away.

따라서 상기와 같은 합성플라스틱으로 인한 환경문제를 해결하기 위하여 플라스틱 폐기물 자체가 미생물에 의해 분해될 수 있는 이른바 분해성 플라스틱 제조에 관한 연구가 활발히 진행 중이다. 분해성 플라스틱의 관련기술로는 생분해성 기술, 광분해성 기술, 상기 두 가지 기술을 조합한 생/광분해 기술로 분류된다. Therefore, in order to solve the environmental problem caused by the synthetic plastic, research on the production of so-called degradable plastics in which the plastic waste itself can be decomposed by microorganisms is actively under way. Related technologies of decomposable plastics are classified into biodegradable technology, photolytic technology, and biological / photolysis technology in which the above two technologies are combined.

생분해성 기술로는 미생물이 가진 고분자화합물 생합성의 기능을 이용하여 만드는 고분자로 폴리 베타 하이드록시부틸레이트(Poly-β-hydroxybutylate : PHB) 및 그 유도체를 합성하는 미생물 합성형, 천연에 존재하는 식물이나 동물을 원료로 제조하는 천연고분자화합물로 전분성형물을 합성하는 광합성, 생분해를 받기 쉬운 고분자화합물을 화학합성으로 만든 고분자로 지방족 에스테르, 지방족 에스테르와 범용 플라스틱 배합체를 합성하는 화학합성형, 상기의 원료나 무기물을 조합시켜 배합기술에 의하여 성능을 향상시키는 것으로 전분과 지방족 에스테르의 배합체, 폴리 베타 하이드록시부틸레이트(Poly-β-hydroxybutylate : PHB)와 지방족 에스테르의 배합체를 합성하는 복합형 등이 있다.Biodegradable technologies include microbial synthesis of poly-β-hydroxybutylate (PHB) and its derivatives as a polymer made by using the function of biosynthesis of polymeric compounds possessed by microorganisms, A chemical synthesis type that synthesizes aliphatic esters, aliphatic esters and general plastic blends with polymers made by chemical synthesis of photosynthetic and biodegradable polymer compounds that synthesize starch moldings with natural polymer compounds made from animal raw materials. Or a combination of starch and aliphatic ester or a combination of poly-beta-hydroxybutylate (PHB) and an aliphatic ester to improve the performance of the composition by combining the two or more inorganic compounds have.

근래에는 주로 옥수수에서 추출된 물질을 통해 생분해성 플라스틱을 형성하고 있는바, PLA(Polylactic acid)가 그것이다. 예를 들면 특허공개 제10-2001-0072123호(2001. 7. 31.) "생분해성 플라스틱 성형용 조성물, 이로부터 얻어진 생분해성 플라스틱, 그 성형방법 및 생분해성 플라스틱의 용도"가 있고, 특허공개 제10-2012-01031858호(2012. 9. 19.) "생분해성 플라스틱 조성물 및 이 조성물로 제조된 생분해성 플라스틱 제품" 등이 있다.In recent years, biodegradable plastics have been formed mainly from materials extracted from corn, such as PLA (polylactic acid). For example, Japanese Patent Application Laid-Open No. 10-2001-0072123 (July 31, 2001) entitled "Composition for Biodegradable Plastic Molding, Biodegradable Plastic Obtained Therefrom, Molding Method and Use of Biodegradable Plastic" 10-12-01031858 (September 19, 2012) "Biodegradable plastic composition and biodegradable plastic product made of this composition".

한편, 종이컵으로 대표되는 종이용기의 경우 내구성을 향상시키기 위해 폴리에틸렌(PE)으로 코팅을 하고 있다. 이외에도 PP, PVC, URETAN 등으로 코팅을 하고도 있는데, 이러한 코팅을 통해 수분의 침투를 막아줌으로써 내부에 담긴 액체가 새거나 또는 수분이 종이에 침투하여 찢어지는 것을 방지하고자 하는 목적으로 코팅을 하고 있었다. On the other hand, in the case of paper containers represented by paper cups, polyethylene (PE) is coated to improve durability. In addition, coatings such as PP, PVC, and URETAN are also used. In order to prevent penetration of moisture through such coating, it is coated to prevent the liquid contained in the inside from leaking or water from penetrating into the paper and tearing it.

그런데, 종래에 코팅재료로 사용되던 폴리에틸렌은 쉽게 썩지 않아 환경을 해친다는 문제가 있었다. 사용된 종이컵은 소각과 매립 외에는 마땅한 처리 방법이 없는데, 매립된 종이컵에서 코팅재료로 사용된 물질이 썩지않음에 따른 문제가 발생하였던 것이다. 뿐만 아니라 오븐이나 전자렌지 등의 고온환경에 노출될 경우 치명적인 독성 환경호르몬이 발생하여 인체에도 이롭지 못하다는 문제가 있었다. 따라서 이러한 문제들을 해결하여야 할 필요가 있었다.
However, polyethylene used conventionally as a coating material has not been easily decayed and has a problem of deteriorating the environment. The used paper cups have no proper treatment methods other than incineration and landfill, but the problems caused by the decay of the materials used as coating materials in the recycled paper cups have arisen. In addition, when exposed to a high temperature environment such as an oven or a microwave oven, toxic environmental hormones are generated, which is not harmful to the human body. Therefore, it was necessary to solve these problems.

본 발명은 시간이 지나면 쉽게 썩어 환경을 해치지 않으면서도 인체에 해로운 성분의 함유가 제한되고 환경호르몬이 발생이 억제되어 인체에 무해한 종이용기를 얻는 것에 그 목적이 있다.
It is an object of the present invention to obtain a paper container which is harmless to the human body by restricting the content of harmful components to the human body and preventing the generation of environmental hormones without deteriorating the environment easily after a long time.

본 발명에서는 코팅재로 생분해성 PLA를 사용하여 종이용기를 코팅함으로써 미생물에 의한 분해가 가능하여 환경을 해치지 않으면서도 인체에 무해한 종이용기를 제안하여 상기의 목적을 달성한다.
According to the present invention, a biodegradable PLA is used as a coating material to coat a paper container to enable degradation by a microorganism. Thus, a paper container which is harmless to the human body without harming the environment is proposed.

본 발명에 따르면 환경호르몬이 발생되지 않아 인체에 이로우면서도 미생물에 의해 쉽게 분해됨으로써 쉽게 썩어 환경을 오염시키지 않게 되는 친환경적인 종이용기를 얻을 수 있게 되어, 종이용기로 인해 발생 되는 환경적인 문제를 확실하게 해소할 수 있게 된다. 더불어 오븐이나 전자렌지 등의 고온환경에 노출되더라도 독성물질이 배출되지 않음으로써 인체에 무해한 효과가 있으며, 넓은 범위의 사용용도가 제공되는 장점이 있다.
According to the present invention, it is possible to obtain an eco-friendly paper container that does not generate an environmental hormone and is easily degraded by a microorganism even though it is easily degraded by a human body, so that the environment is not contaminated, . In addition, even when exposed to a high temperature environment such as an oven or a microwave oven, toxic substances are not discharged, which is harmless to the human body and provides a wide range of applications.

도 1은 본 발명에 의해 생분해서 PLA가 코팅된 종이용기를 제조하는 과정을 개략적으로 보여주는 공정도.BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a process of producing a paper container coated with PLA according to the present invention. FIG.

본 발명은 시간이 지나면 쉽게 썩어 환경을 해치지 않으면서도 인체에 해로운 성분의 함유가 제한되고 환경호르몬이 발생이 억제되어 인체에 무해한 종이용기를 얻기 위해, 생분해성 PLA가 코팅되어 미생물의 의한 분해가 가능하고 환경호르몬이 생성이 억제되는 것을 특징으로 하는 생분해성 PLA 코팅 종이용기 및 그것을 제조하는 방법을 제안한다.The present invention is able to decompose biodegradable PLA coated with biodegradable PLA in order to obtain a paper container which does not deteriorate the environment easily and deteriorates the environment but is harmful to the human body and inhibits the generation of environmental hormones and is harmless to human body over time And the production of environmental hormones is inhibited, and a biodegradable PLA coated paper container and a method of manufacturing the same are proposed.

이하, 본 발명을 첨부된 도면 도 1을 참고로 하여 상세하게 설명한다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 의해 생분해성 PLA 가 코팅된 종이용기를 제조하는 과정을 개략적으로 보여주는 공정도이다.BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a process of producing a paper container coated with biodegradable PLA according to the present invention. FIG.

본 발명에 의한 종이용기는 생분해성 플라스틱으로 되는 코팅층이 형성된다. 종래 폴리에틸렌 등으로 된 코팅층을 대체하여 형성되는 것이다. The paper container according to the present invention is formed with a coating layer made of biodegradable plastic. And is formed by replacing a coating layer made of polyethylene or the like.

상기 종이용기는 대표적으로 종이컵이 있다. 종이컵은 주로 1회용으로 사용되고 있는데, 폴리에틸렌으로 코팅된 종래의 종이컵은 땅속에 묻히게 되면 종이는 분해되지만 폴리에틸렌과 같은 종래 코팅재료는 분해되지 않는다. 그런데 상기와 같이 생분해성 플라스틱으로 코팅된 본 발명에 의한 종이컵은 미생물에 의해 쉽게 분해되므로 환경을 훼손하지 않게 되는 것이다. 이외에 본 발명에 따른 종이용기의 적용예로는 컵라면 등의 종이용기는 물론, 따뜻한 음식에 접촉하여 고온환경에 노출되어지는 종이도시락, 종이접시, 종이로 된 음식상자, 종이트레이 등으로 다양하게 적용 가능하다.The paper container is typically a paper cup. Paper cups are mainly used as disposable ones. Conventional paper cups coated with polyethylene are decomposed when they are buried in the ground, but conventional coating materials such as polyethylene are not decomposed. However, since the paper cup according to the present invention coated with the biodegradable plastic is easily decomposed by the microorganisms, the environment is not damaged. In addition, examples of the application of the paper container according to the present invention include a paper container such as cup noodle, a paper container made of paper, a paper tray, a paper tray, etc. exposed to a high temperature environment in contact with warm food Applicable.

상기 생분해성 플라스틱은 옥수수에서 추출한 것일 수 있다. 옥수수전분에서 추출하게 되는데, 옥수수전분을 분해해서 포도당을 만들고, 이것을 발효법으로 젖산균으로 변환시켜 화학중합법으로 생분해성 플라스틱을 제조하는 것이며, PLA(Polylactic acid, 이하 동일)가 그것이다.The biodegradable plastic may be extracted from corn. It is extracted from corn starch. It is made by decomposing corn starch to make glucose, converting it into lactic acid bacteria by fermentation method, and producing biodegradable plastic by chemical polymerization, and it is PLA (Polylactic acid, hereinafter the same).

한편, 상기 코팅층은 생분해성 플라스틱이 다수 층을 이루게 코팅된 것일 수 있다. 한꺼번에 소망하는 두께로 코팅하게 되면 두께가 균일하지 못하고 강도 또한 소망하는 정도에 이르지 못할 수 있으므로, 다수 층이 적층되게 함으로써 균일한 두께로 코팅층이 형성되게 함과 아울러 강도를 증가시킬 수 있는 것이다. 이로써 종이용기의 내구성 향상을 기대할 수 있게 된다.On the other hand, the coating layer may be formed by coating a plurality of biodegradable plastics. If the desired thickness is coated all at once, the thickness may not be uniform and the strength may not reach a desired level. Therefore, by stacking a plurality of layers, the coating layer can be formed with uniform thickness and the strength can be increased. As a result, the durability of the paper container can be expected to be improved.

이하, 이상과 같은 본 발명에 의한 생분해성 플라스틱 코팅 종이용기 제조방법을 설명한다.Hereinafter, a method of manufacturing a biodegradable plastic-coated paper container according to the present invention will be described.

우선 옥수수전분을 준비하여 생분해성 플라스틱 PLA를 형성한다. 옥수수전분을 분해해서 포도당을 만들고, 이것을 발효법으로 젖산균으로 변환시켜 화학중합법으로 PLA를 제조하는 것이다.First, corn starch is prepared to form a biodegradable plastic PLA. Corn starch is decomposed to make glucose, and it is converted into lactic acid bacteria by fermentation method to produce PLA by chemical polymerization.

이와 같이 제조된 PLA를 액상으로 형성하여 도포액을 준비한다. 일정한 온도를 가해서 액상으로 형성하게 되는데, 이때 저온하에서 오랜 시간 열을 가하여 멜팅(melting) 함으로써 환경호르몬이 발생하지 않도록 하는 환경에서 도포액을 형성하게 된다.The PLA thus prepared is formed into a liquid phase to prepare a coating liquid. The liquid is formed at a constant temperature by applying heat at a low temperature for a long period of time and melting to form an application liquid in an environment where the environment hormone is not generated.

도포액의 형성이 완료되면 상기 도포액을 원지에 분사하고 건조하여 원지에 코팅층을 형성한다. 원지는 원지롤에서 차례로 공급되는 것으로서, 원지가 원지롤에서 공급되면 노즐을 통해 상기 도포액이 원지의 한쪽 면에 분사되면서 도포되게 되는 것이다. When the formation of the coating liquid is completed, the coating liquid is sprayed onto the raw paper and dried to form a coating layer on the raw paper. The raw paper is fed sequentially from the paper roll, and when the paper is fed from the paper roll, the coating liquid is sprayed on one side of the paper through the nozzle.

도포액의 도포가 완료되면 건조과정을 거치게 된다. 건조는 건조로를 통해 이루어 질 수 있다. 도포액이 도포된 원지가 건조로에 진입하여 건조로를 통과하면서 도포액이 자연스럽게 건조되어 코팅층을 형성하게 되는 것이다. When the application of the coating liquid is completed, the drying process is performed. Drying can be done through a drying oven. The raw paper coated with the coating liquid enters the drying furnace and passes through the drying furnace to naturally dry the coating liquid to form a coating layer.

한편, 도포액의 도포와 건조는 다수 회 반복될 수 있다. 즉, 상기 건조로를 통과하여 코팅층이 형성된 원지에 다시 도포액이 도포된 다음 건조로를 거치게 형성될 수 있는 것이다. 분사기와 건조기가 각각 다수 개 마련되어 반복적으로 공정이 진행됨으로써 달성될 수 있다. 이를 통해 얇게 여러 번 도포액을 도포하여 다수 층을 이루는 코팅층을 형성할 수 있게 된다. 이로써 비교적 균일한 도포가 가능해지게 되고 코팅층의 강도도 향상된다.On the other hand, application and drying of the coating liquid can be repeated many times. That is, the coating liquid may be applied to the raw paper on which the coating layer is formed after passing through the drying furnace, and then may be formed to pass through the drying furnace. A plurality of sprayers and a plurality of dryers may be provided and the process may be repeatedly performed. The coating liquid can be applied thinly several times to form a coating layer having a plurality of layers. As a result, relatively uniform coating is possible and the strength of the coating layer is improved.

이상이 과정을 통해 코팅층이 형성된 원지가 구비되면, 이를 재단하여 종이용기를 형성하게 된다. 다양한 용도의 종이용기를 형성할 수 있는바, 대표적으로 종이컵이 있고, 종이용기, 종이도시락, 종이접시, 종이로 된 음식상자, 종이트레이 등 소망하는 형태로 재단하고 가공하여서 종이용기를 형성할 수 있는 것이다. When the raw paper on which the coating layer is formed is provided through the above process, it is cut to form a paper container. A paper container, a paper lunch box, a paper tray, a food box made of paper, a paper tray, and the like can be cut and processed to form a paper container. It is.

상기에 따라 형성된 종이용기는 생분해성 플라스틱으로 코팅됨에 따라 미생물에 의한 분해가 가능하여 땅에 묻히면 쉽게 썩어 분해됨으로써 환경을 해치지 않게 되고, 천연 물질로부터 유래된 재질임에 따라 인체에도 무해하여 안전하게 사용할 수 있게 되는 것이다.
Since the paper container formed according to the above is coated with biodegradable plastic, it can be decomposed by microorganisms. When it is buried in the ground, it is easily decomposed and decomposed to prevent harm to the environment. It will be.

Claims (6)

생분해성 PLA(Polylactic acid)가 코팅재료로 사용되어 미생물의 의한 분해가 가능하고 환경호르몬이 생성이 억제되는 것을 특징으로 하는 생분해성 PLA 코팅 종이용기.
A biodegradable PLA coated paper container characterized in that biodegradable PLA (polylactic acid) is used as a coating material to decompose by microorganisms and inhibits the production of environmental hormones.
제1 항에 있어서,
상기 생분해성 PLA는 옥수수전분에서 추출한 것을 특징으로 하는 생분해성 PLA 코팅 종이용기.
The method according to claim 1,
Wherein the biodegradable PLA is extracted from corn starch.
제1 항에 있어서,
상기 생분해성 PLA 는 다수 층을 이루게 코팅된 것임을 특징으로 하는 생분해성 PLA 코팅 종이용기.
The method according to claim 1,
Wherein the biodegradable PLA is coated with a plurality of biodegradable PLA coated paper containers.
옥수수전분에서 추출된 생분해성 PLA 를 액상으로 형성하여 도포액을 형성하는 단계;
상기 도포액을 원지에 분사하고 건조하여 코팅하는 코팅단계;
상기 코팅단계에서 생분해성 PLA 가 코팅된 원지를 재단하여 종이용기를 형성하는 단계;를 포함하는 생분해성 PLA 코팅 종이용기 제조방법.
Forming biodegradable PLA extracted from corn starch into a liquid phase to form a coating liquid;
A coating step of spraying the coating liquid onto a raw paper, drying and coating the coating liquid;
Wherein the biodegradable PLA-coated paper container is formed by cutting a biodegradable PLA-coated paper in the coating step.
제4 항에 있어서,
상기 도포액은 저온에서 멜팅(melting)되어 환경호르몬이 생성되지 않게 되는 것을 특징으로 하는 생분해성 PLA 코팅 종이용기 제조방법.
5. The method of claim 4,
Wherein the coating liquid is melted at a low temperature and no organic hormone is produced.
제4 항에 있어서,
상기 코팅단계는 다수회 반복되어 고른 두께로 코팅층이 형성됨과 아울러 강도가 강화되는 것을 특징으로 하는 생분해성 PLA 코팅 종이용기 제조방법.
5. The method of claim 4,
Wherein the coating step is repeated a plurality of times to form a coating layer having a uniform thickness and to strengthen the biodegradable PLA coated paper container.
KR1020130155758A 2013-12-13 2013-12-13 Paper vessel used polylactic acid coating and manufacturing method thereof KR20150069402A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210115654A (en) * 2020-03-16 2021-09-27 한국조폐공사 molding base paper and molded paper vessel produced from it
KR102564243B1 (en) * 2022-06-29 2023-08-07 주식회사 엔피코리아 Eco-friendly packaging container manufacturing method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210115654A (en) * 2020-03-16 2021-09-27 한국조폐공사 molding base paper and molded paper vessel produced from it
KR102564243B1 (en) * 2022-06-29 2023-08-07 주식회사 엔피코리아 Eco-friendly packaging container manufacturing method

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