KR102090431B1 - Recycling method for scrap of poly lactic acid resin - Google Patents

Recycling method for scrap of poly lactic acid resin Download PDF

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KR102090431B1
KR102090431B1 KR1020190156459A KR20190156459A KR102090431B1 KR 102090431 B1 KR102090431 B1 KR 102090431B1 KR 1020190156459 A KR1020190156459 A KR 1020190156459A KR 20190156459 A KR20190156459 A KR 20190156459A KR 102090431 B1 KR102090431 B1 KR 102090431B1
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temperature
degrees celsius
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pla resin
pla
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KR1020190156459A
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Korean (ko)
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이정호
곽호성
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이정호
곽호성
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/04—Disintegrating plastics, e.g. by milling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/82—Heating or cooling
    • B29B7/823—Temperature control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/10—Making granules by moulding the material, i.e. treating it in the molten state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/16—Auxiliary treatment of granules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/04—Disintegrating plastics, e.g. by milling
    • B29B2017/0424—Specific disintegrating techniques; devices therefor
    • B29B2017/0476—Cutting or tearing members, e.g. spiked or toothed cylinders or intermeshing rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/04—Disintegrating plastics, e.g. by milling
    • B29B2017/0424—Specific disintegrating techniques; devices therefor
    • B29B2017/0496—Pyrolysing the materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B29K2067/04—Polyesters derived from hydroxycarboxylic acids
    • B29K2067/046—PLA, i.e. polylactic acid or polylactide
    • 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
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
    • 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
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

The present invention relates to a manufacturing method which enables recycling of scrap and waste of an eco-friendly poly lactic acid (PLA) resin and, more specifically, to a manufacturing method which can be converted into various colors as needed by crushing and thermally decomposing the PLA resin waste and be manufactured, and recycles and uses the PLA resin waste, thereby effectively saving resources, preventing the waste consumed in processing the PLA resin waste of eco-friendly materials, and preventing serious environmental pollution from waste disposal.

Description

친환경 PLA 수지 폐기물의 재활용 제조방법 { Recycling method for scrap of poly lactic acid resin }Recycling method for scrap of poly lactic acid resin}

본 발명은 친환경 소재인 PLA 수지의 폐기물을 재활용품으로 제조하도록 한 방법에 관한 것으로, 특히 PLA 수지 폐기물을 파쇄하고 열분해하여 필요에 따라 다양한 색상으로 변환되도록 형성함으로써, 폐기물을 재생하여 사용할 수 있어 자원을 절약할 수 있을 뿐만 아니라, 친환경 소재의 PLA 수지를 재활용하기 때문에, 수지재의 폐기물 처리에 소모되는 심각한 환경오염을 예방할 수 있도록 한 것이다.The present invention relates to a method for manufacturing wastes of PLA resin, which is an eco-friendly material, as recycled products. In particular, by crushing and thermally decomposing PLA resin wastes, they are formed to be converted into various colors as needed, so that wastes can be recycled and used. Not only can it be saved, but because it recycles PLA resin made of eco-friendly materials, it is possible to prevent serious environmental pollution that is consumed in waste treatment of resin materials.

일반적으로 플라스틱, 합성수지는 비교적 가볍고 내구성도 우수하며, 전기가 통하지 않는 비전도체이고, 산과 염기에도 강한 소재로서, 근래에 와서 다양한 분야에서 광범위하게 사용되고 있다.In general, plastics and synthetic resins are relatively light, durable, non-conductive, and resistant to acids and bases, and have been widely used in various fields in recent years.

그러나, 이러한 합성수지는 썩거나 분해되지 않기 때문에, 토질오염과 수질오염, 대기오염과 해양오염 등의 심각한 환경오염 문제가 대두되고 있다.However, since these synthetic resins do not decay or decompose, serious environmental pollution problems such as soil pollution, water pollution, air pollution and marine pollution have emerged.

근래에 와서는 PLA 수지 등의 생분해성 수지의 소재가 개발되고 있는추세이고, 이러한 생분해성 수지는 식물 유래의 유산으로부터 생성되고 있는 플라스틱 소재로서, 석유 유래와는 달리, 생성 중에 이산화탄소의 배출량이 적은 것이나, 땅에 묻어 분해할 수 있는 것부터도 환경에 좋은 소재로서 주목받고 있다.In recent years, biodegradable resin materials such as PLA resins have been developed, and these biodegradable resins are plastic materials generated from plant-derived lactic acid. It is attracting attention as a material that is good for the environment, even from things that can be decomposed on the ground.

이와 같은 종래의 PLA 수지의 제조와 재활용에 관련한 종래의 선행기술문헌으로는, 대한민국 등록특허공보 제10-1373413호의 발명의 명칭 ‘PLA 생분해성 수지 조성물, 이를 이용한 생분해성 시트 및 그 제조방법 ’이 있다.As the prior art documents related to the production and recycling of such conventional PLA resins, the name of the invention of Korean Patent Registration No. 10-1373413, 'PLA biodegradable resin composition, biodegradable sheet using the same and method for manufacturing the same' have.

상기한 종래의 발명은 자연 상태에서 생분해가 가능하여 환경 친화적이면서 기계적 물성은 물론, 내열성 및 내구성 등이 우수한 생분해성 수지 조성물, 및 이를 이용한 생분해성 시트, 그리고 상기 생분해성 수지의 제조방법을 제공하도록 한 것이다.The above-described conventional invention is to provide a biodegradable resin composition that is biodegradable in a natural state, environmentally friendly, excellent in mechanical properties, heat resistance and durability, and a biodegradable sheet using the same, and a method for manufacturing the biodegradable resin It is done.

그리고 다른 종래의 선행기술문헌으로, 대한민국 등록특허공보 제10-1715968호의 발명의 명칭 ‘PLA 계 중합체 혼합물의 입체특이적 재활용 방법 ’은, 단량체 또는 이의 유도체 중 하나를 개질하기 위해, 단순하고, 효과적이고 품질을 떨어뜨리지 않는 PLA 의 입체특이적 재활용 방법을 제공하고, 전통적인 락테이트 시장에 진입하거나 PLA 의 합성을 위한 원료 물질로서 다시 제공하도록 한 것이다.And as another conventional prior art document, the title of the invention of the Republic of Korea Patent Registration No. 10-1715968 'stereospecific recycling method of the PLA-based polymer mixture,' is simple, effective to modify one of the monomers or derivatives thereof It is to provide a stereospecific recycling method of PLA that does not degrade the quality and to enter the traditional lactate market or to provide it again as a raw material for the synthesis of PLA.

그러나 상기한 종래의 PLA 수지의 제조 및 재활용 방법은, 다양한 산업 및 제조현장에서 제조 및 소비를 통해 사용하고 남은 PLA 수지의 폐기물을 다시 재활용할 수 있도록 한 방법이 거의 전무한 상황이기 때문에, 자원을 절감하고 환경을 보존하는 차원에서 PLA 수지의 효율적인 재활용 방법에 대한 연구와 개발이 절실히 요구되는 실정이었다.However, the above-mentioned conventional PLA resin manufacturing and recycling method is used in various industries and manufacturing sites through manufacturing and consumption, and there is almost no way to recycle the remaining PLA resin waste, thus saving resources. In order to preserve the environment, research and development of efficient recycling methods of PLA resins were urgently required.

상기한 문제점을 해결하기 위해 본 발명은, PLA 수지 폐기물을 파쇄하고 열분해하여 필요에 따라 다양한 색상으로 변환하여 제조할 수 있도록 함으로써, PLA 폐기물을 재생하여 사용할 수 있기 때문에, 자원을 효과적으로 절약할 수 있을 뿐만 아니라, 친환경 소재의 PLA 수지 폐기물 처리에 소모되는 낭비를 방지하고, 폐기물 처리에서 발생하는 심각한 환경오염을 예방할 수 있도록 한 것이다.In order to solve the above problems, the present invention, by crushing and thermal decomposition of PLA resin waste so that it can be produced by converting it into various colors as needed, PLA waste can be recycled and used, thereby effectively saving resources. In addition, it is to prevent waste consumed in the processing of PLA resin wastes made of eco-friendly materials, and to prevent serious environmental pollution caused by waste treatment.

본 발명은 수집된 PLA 수지의 스크랩을 색상 별로 분류하고, 각각 크기의 폐기물을 파쇄기를 이용하여 5 ~ 20 cm의 크기로 절단, 파쇄하도록 하는 분류 및 파쇄단계와; The present invention sorts and shreds to sort the scraps of the collected PLA resin by color, and to cut and shred wastes of each size to a size of 5 to 20 cm using a crusher;

동종의 색상으로 분류되어 파쇄된 PLA 수지 폐기물을 분쇄기를 통해 10mm의 크기로 분쇄시키도록 하는 분쇄단계와;A crushing step of pulverizing PLA resin wastes classified by the same color and shredding to a size of 10 mm through a grinder;

분쇄된 같은 색상의 PLA 수지 분쇄물 중 변색이 가능한 분쇄물은 조합하여 색상을 변환시키도록 열분해장치에서 열분해시키도록 하고, PLA 수지 분쇄물 중에 변색이 어려운 분쇄물에는 변환하고자 하는 색상의 칩을 투입시켜 열분해장치에서 열분해시키도록 하는 색상 안정화 및 열분해단계와;Among the crushed PLA resin pulverized products of the same color, crushed products that can be discolored are thermally decomposed by a pyrolysis apparatus to convert colors, and chips of the color to be converted are put into crushed products that are difficult to discolor among the PLA resin crushed products. A color stabilization and pyrolysis step to thermally decompose in a pyrolysis apparatus;

PLA 수지 분쇄물 76중량%에 생분해성 PLA 10중량%, 백색컬러안료 10중량%, 백색 탈크(talc) 1중량%, 저밀도 폴리에틸렌(LDPE) 1중량%, 고밀도 폴리에틸렌(HDPE) 1중량%, 무독의 가소제 0.5중량%, 녹색컬러안료 0.5 중량%의 원료를 조성하여 혼합장치에 투입시키도록 하는 배합단계와;PLA resin pulverized product, 76% by weight, 10% by weight of biodegradable PLA, 10% by weight of white color pigment, 1% by weight of white talc, 1% by weight of low density polyethylene (LDPE), 1% by weight of high density polyethylene (HDPE), non-toxic The plasticizer of 0.5% by weight, green color pigment 0.5% by weight of the raw material composition step to be added to the mixing device;

원료가 배합된 고온의 혼합물을 압착성형장치에서 판형, 봉형의 일정 형태로 압착, 성형시키도록 하는 압착 성형단계와;A compression molding step of compressing and molding a mixture of raw materials at a high temperature in a compression molding apparatus in a predetermined shape of a plate shape or a rod shape;

압착 성형된 성형물을 수냉식으로 4 ~ 5초 동안 냉각시키도록 한 후, 공냉으로 10 ~ 13초 동안 냉각시키도록 하는 냉각단계와;A cooling step of allowing the compression-molded article to be cooled by water cooling for 4 to 5 seconds, and then cooled by air for 10 to 13 seconds;

냉각된 성형물을 일정 크기로 절단하도록 하는 절단단계;A cutting step of cutting the cooled molding into a certain size;

로 구성되는 것을 특징으로 한다. It is characterized by consisting of.

이상에서 설명한 바와 같이, 본 발명은 PLA 수지 폐기물을 파쇄하고 열분해하여 필요에 따라 다양한 색상으로 변환하여 제조할 수 있도록 함으로써, PLA 폐기물을 재생하여 사용할 수 있기 때문에, 자원을 효과적으로 절약할 수 있을 뿐만 아니라, 친환경 소재의 PLA 수지 폐기물 처리에 소모되는 낭비를 방지하고, 폐기물 처리에서 발생하는 심각한 환경오염을 예방할 수 있도록 한 유익한 발명인 것이다.As described above, the present invention allows PLA resin wastes to be crushed and thermally decomposed to be converted into various colors as necessary to be manufactured, so that PLA wastes can be recycled and used, thereby effectively saving resources. , It is an advantageous invention that prevents waste consumed in the processing of PLA resin wastes made of eco-friendly materials and prevents serious environmental pollution caused by waste treatment.

도 1은 본 발명의 친환경 PLA 수지 폐기물의 재활용 제조방법의 실시예를 나타낸 블록도이다.
우선 각 도면의 구성요소들에 참조부호를 부가함에 있어서, 동일한 구성요소들에 대해서는 비록 다른 도면상에 표시되더라도 가능한 한 동일한 부호를 가지도록 하고 있음에 유의해야 한다.
또한, 본 발명을 설명함에 있어서, 관련된 공지 구성 또는 기능에 대한 구체적인 설명이 본 발명의 요지를 흐릴 수 있다고 판단되는 경우에는 그 상세한 설명은 생략한다.1 is a block diagram showing an embodiment of a method for recycling recycling of eco-friendly PLA resin waste of the present invention.
First, it should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible even though they are displayed on different drawings.
In addition, in describing the present invention, when it is determined that detailed descriptions of related well-known structures or functions may obscure the subject matter of the present invention, detailed descriptions thereof will be omitted.

이하, 본 발명의 실시예를 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

분류 및 파쇄단계 (S1)Classification and shredding step (S1)

수집된 PLA 수지의 스크랩(scrap), 폐기물을 색상 별로 분류하고, 각각의 크기의 폐기물을 파쇄기를 이용하여 약 5 ~ 20 cm의 크기로 절단, 파쇄하도록 한다. Scrap and waste of the collected PLA resin are classified by color, and each size of waste is cut and shredded to a size of about 5 to 20 cm using a crusher.

분쇄단계 (S2)Grinding step (S2)

동종의 색상으로 분류되어 파쇄된 PLA 수지 폐기물을 분쇄기를 통해 약 10mm의 크기로 분쇄시키도록 한다.The crushed PLA resin waste classified by the same color is crushed to a size of about 10 mm through a grinder.

색상 안정화 및 열분해단계 (S3)Color stabilization and pyrolysis step (S3)

분쇄된 같은 색상의 PLA 수지 분쇄물 중 변색이 가능한 분쇄물은 조합하여 색상을 변환시키도록 열분해장치에서 열분해시키도록 한다.Among the crushed PLA resin pulverized products of the same color, crushed crushed products are combined to be thermally decomposed in a pyrolysis apparatus to convert colors.

그리고, PLA 수지 분쇄물 중에 자체적으로 변색이 어려운 분쇄물에는 변환하고자 하는 색상의 칩을 투입시켜 열분해장치에서 열분해시키도록 한다.In addition, chips of a color to be converted are introduced into a pulverized material that is difficult to discolor itself among the pulverized PLA resin to be thermally decomposed in a pyrolysis device.

배합단계 (S4)Mixing step (S4)

PLA 수지 분쇄물 76중량%에 생분해성 PLA 10중량%, 백색컬러안료 10중량%, 백색 탈크(talc) 1중량%, 저밀도 폴리에틸렌(LDPE) 1중량%, 고밀도 폴리에틸렌(HDPE) 1중량%, 무독의 가소제 0.5중량%, 녹색컬러안료 0.5 중량%의 원료를 조성하여 혼합장치에 투입시키도록 한다.PLA resin pulverized product, 76% by weight, 10% by weight of biodegradable PLA, 10% by weight of white color pigment, 1% by weight of white talc, 1% by weight of low density polyethylene (LDPE), 1% by weight of high density polyethylene (HDPE), non-toxic The composition of 0.5% by weight of plasticizer and 0.5% by weight of green color pigment is added to the mixing device.

이때, 혼합장치는 섭씨 100 ~ 120도의 온도를 유지시키고, 200 RPM의 회전속도로 3분간 회전시키도록 하여, 투입된 원료를 배합시키도록 한다.At this time, the mixing device maintains a temperature of 100 to 120 degrees Celsius, and rotates at a rotation speed of 200 RPM for 3 minutes to mix the input raw materials.

압착 성형단계 (S5)Compression molding step (S5)

배합단계(S4)에서 원료가 배합된 고온의 혼합물을 압착성형장치에서 판형이나 봉형 등의 일정 형태로 압착, 성형시키도록 한다.In the compounding step (S4), the high-temperature mixture in which the raw materials are blended is compressed and molded into a certain shape such as a plate shape or a rod shape in a compression molding apparatus.

이때, 압착성형장치는 8단계의 구간으로 온도조절을 구분하여 압착성형이 진행되도록 하되, 1번 압착온도는 섭씨 70도, 2번 압착온도는 섭씨 70도, 3번 압착온도는 섭씨 100도, 4번 압착온도는 섭씨 60도, 5번 압착온도는 섭씨 60도, 6번 압착온도는 섭씨 50도, 7번 압착온도는 섭씨 50도, 8번 압착온도는 섭씨 80도의 온도를 유지시켜 압착, 성형되도록 한다.At this time, the compression molding device is divided into 8 stages to separate the temperature control so that the compression molding proceeds, but the first compression temperature is 70 degrees Celsius, the second compression temperature is 70 degrees Celsius, and the third compression temperature is 100 degrees Celsius, Pressing temperature 4 is 60 degrees Celsius, pressing 5 is 60 degrees Celsius, pressing 6 is 50 degrees Celsius, pressing 7 is 50 degrees Celsius, pressing 8 is 80 degrees Celsius, To be molded.

냉각단계 (S6)Cooling stage (S6)

압착 성형된 성형물을 수냉식으로 약 4 ~ 5초 동안 냉각시키도록 한 후, 공냉으로 약 10 ~ 13초 동안 냉각시키도록 한다.The compression molded article is cooled by water cooling for about 4 to 5 seconds, and then cooled by air for about 10 to 13 seconds.

절단단계 (S7)Cutting step (S7)

냉각된 성형물을 일정 크기로 절단하도록 한다.Cut the cooled molding into a certain size.

이때, 성형물의 절단 크기는 지름 약 3.5 ~ 4 mm, 길이 약 5 ~ 6mm의 크기로 절단하는 것이 바람직하나, 그 절단 크기를 반드시 한정하는 것은 아니다.At this time, the cut size of the molding is preferably cut to a size of about 3.5 to 4 mm in diameter and about 5 to 6 mm in length, but the cut size is not necessarily limited.

이상의 설명은 본 발명의 기술 사상을 예시적으로 설명한 것에 불과한 것으로서, 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자라면 본 발명의 본질적인 특성에서 벗어나지 않는 범위에서 다양한 수정 및 변형이 가능할 것이다.The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and variations without departing from the essential characteristics of the present invention.

따라서, 본 발명에 개시된 실시예들은 본 발명의 기술 사상을 한정하기 위한 것이 아니라 설명하기 위한 것이고, 이러한 실시예에 의하여 본 발명의 기술 사상의 범위가 한정되는 것은 아니다.Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments.

본 발명의 보호 범위는 아래 청구범위에 의하여 해석되어야 하며, 그와 동등한 범위 내에 있는 모든 기술 사상은 본 발명의 권리범위에 포함되는 것으로 해석되어야 할 것이다.The scope of protection of the present invention should be interpreted by the claims below, and all technical spirits within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

도면 주요 부분에 대한 부호의 설명
S1 : 분류 및 파쇄단계 S2 : 분쇄단계
S3 : 색상 안정화 및 열분해단계 S4 : 배합단계
S5 : 압착단계 S6 : 냉각단계
S7 : 절단단계 Explanation of reference numerals for main parts of the drawing
S1: Sorting and shredding step S2: Grinding step
S3: Color stabilization and pyrolysis step S4: Mixing step
S5: Crimping step S6: Cooling step
S7: cutting step

Claims (3)

수집된 PLA 수지의 스크랩을 색상 별로 분류하고, 각각 크기의 폐기물을 파쇄기를 이용하여 5 ~ 20 cm의 크기로 절단, 파쇄하도록 하는 분류 및 파쇄단계(S1)와;
동종의 색상으로 분류되어 파쇄된 PLA 수지 폐기물을 분쇄기를 통해 10mm의 크기로 분쇄시키도록 하는 분쇄단계(S2)와;
분쇄된 같은 색상의 PLA 수지 분쇄물 중 변색이 가능한 분쇄물은 조합하여 색상을 변환시키도록 열분해장치에서 열분해시키도록 하고, PLA 수지 분쇄물 중에 변색이 어려운 분쇄물에는 변환하고자 하는 색상의 칩을 투입시켜 열분해장치에서 열분해시키도록 하는 색상 안정화 및 열분해단계(S3)와;
PLA 수지 분쇄물 76중량%에 생분해성 PLA 10중량%, 백색컬러안료 10중량%, 백색 탈크(talc) 1중량%, 저밀도 폴리에틸렌(LDPE) 1중량%, 고밀도 폴리에틸렌(HDPE) 1중량%, 무독의 가소제 0.5중량%, 녹색컬러안료 0.5 중량%의 원료를 조성하여 혼합장치에 투입시키도록 하는 배합단계(S4)와;
원료가 배합된 고온의 혼합물을 압착성형장치에서 판형, 봉형의 일정 형태로 압착, 성형시키도록 하는 압착 성형단계(S5)와;
압착 성형된 성형물을 수냉식으로 4 ~ 5초 동안 냉각시키도록 한 후, 공냉으로 10 ~ 13초 동안 냉각시키도록 하는 냉각단계(S6)와;
냉각된 성형물을 일정 크기로 절단하도록 하는 절단단계(S7);
로 형성하도록 구성되는 것을 특징으로 하는 친환경 PLA 수지 폐기물의 재활용 제조방법.
A sorting and crushing step (S1) for sorting scraps of the collected PLA resins by color, and cutting and shredding wastes of each size to a size of 5 to 20 cm using a crusher;
A crushing step (S2) of pulverizing PLA resin wastes classified into the same color and pulverized to a size of 10 mm;
Among the PLA resin grinds of the same color that are discolored, the grindables that can be discolored are thermally decomposed by a pyrolysis apparatus to convert colors, and chips of the color to be converted are put into the grinds that are difficult to discolor among the PLA resin grinds. Color stabilization and thermal decomposition step (S3) to the thermal decomposition by the pyrolysis apparatus;
PLA resin pulverized product, 76% by weight of biodegradable PLA, 10% by weight of white color pigment, 1% by weight of white talc, 1% by weight of low density polyethylene (LDPE), 1% by weight of high density polyethylene (HDPE), non-toxic And a plasticizer of 0.5% by weight, green color pigment 0.5% by weight of the raw material composition step (S4) to be introduced into the mixing device;
A compression molding step (S5) in which a high-temperature mixture in which the raw materials are blended is compressed and formed into a predetermined shape of a plate shape or a rod shape in a compression molding apparatus;
A cooling step (S6) for cooling the compression-molded article by water cooling for 4 to 5 seconds, and then cooling for 10 to 13 seconds by air cooling;
Cutting step (S7) to cut the cooled molding to a certain size;
Recycling manufacturing method of environmentally friendly PLA resin waste, characterized in that it is configured to form.
제 1항에 있어서,
배합단계(S4)에서 혼합장치를 섭씨 100 ~ 120도의 온도를 유지시키고, 200 RPM의 회전속도로 3분간 회전시키도록 하여, 투입된 원료를 배합시키도록 형성하여 구성되는 것을 특징으로 하는 친환경 PLA 수지 폐기물의 재활용 제조방법.
According to claim 1,
Eco-friendly PLA resin waste, characterized in that the mixing device is formed by maintaining the temperature of 100 ~ 120 degrees Celsius in the mixing step (S4), and rotating it for 3 minutes at a rotation speed of 200 RPM to mix the input raw materials. Recycling manufacturing method.
제 1항에 있어서,
압착 성형단계(S5)에서 압착성형장치를 8단계의 구간으로 온도조절을 구분하여 압착성형이 진행되도록 하되, 1번 압착온도는 섭씨 70도, 2번 압착온도는 섭씨 70도, 3번 압착온도는 섭씨 100도, 4번 압착온도는 섭씨 60도, 5번 압착온도는 섭씨 60도, 6번 압착온도는 섭씨 50도, 7번 압착온도는 섭씨 50도, 8번 압착온도는 섭씨 80도의 온도를 유지시켜 압착, 성형되도록 형성하여 구성되는 것을 특징으로 하는 친환경 PLA 수지 폐기물의 재활용 제조방법.
According to claim 1,
In the compression molding step (S5), the compression molding device is divided into 8 sections to allow temperature compression to proceed, but the first compression temperature is 70 degrees Celsius, the second compression temperature is 70 degrees Celsius, and the third compression temperature is Is 100 degrees Celsius, the fourth crimp temperature is 60 degrees Celsius, the fifth crimp temperature is 60 degrees Celsius, the sixth crimp temperature is 50 degrees Celsius, the seventh crimp temperature is 50 degrees Celsius, and the eight crimp temperature is 80 degrees Celsius. Recycling manufacturing method of environmentally friendly PLA resin waste, characterized in that it is configured to be formed to be compressed, molded to maintain.
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