KR20230104372A - Method for manufacturing a flexible conduit using a molded composition comprising de-crosslinked recycled polyethylene - Google Patents
Method for manufacturing a flexible conduit using a molded composition comprising de-crosslinked recycled polyethylene Download PDFInfo
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- KR20230104372A KR20230104372A KR1020210193145A KR20210193145A KR20230104372A KR 20230104372 A KR20230104372 A KR 20230104372A KR 1020210193145 A KR1020210193145 A KR 1020210193145A KR 20210193145 A KR20210193145 A KR 20210193145A KR 20230104372 A KR20230104372 A KR 20230104372A
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- bent conduit
- manufacturing
- decrosslinked
- polyethylene
- recycled polyethylene
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- 239000004698 Polyethylene Substances 0.000 title claims abstract description 80
- -1 polyethylene Polymers 0.000 title claims abstract description 79
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 79
- 239000000203 mixture Substances 0.000 title claims abstract description 68
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 26
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- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 12
- 238000004132 cross linking Methods 0.000 claims description 10
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- 238000000465 moulding Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 2
- 239000008116 calcium stearate Substances 0.000 claims description 2
- 235000013539 calcium stearate Nutrition 0.000 claims description 2
- 239000006229 carbon black Substances 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010445 mica Substances 0.000 claims description 2
- 229910052618 mica group Inorganic materials 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 239000000454 talc Substances 0.000 claims description 2
- 229910052623 talc Inorganic materials 0.000 claims description 2
- 239000002023 wood Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims 1
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- 238000002360 preparation method Methods 0.000 description 16
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- 229920001903 high density polyethylene Polymers 0.000 description 7
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- 229920000642 polymer Polymers 0.000 description 5
- 238000004064 recycling Methods 0.000 description 5
- 229920003020 cross-linked polyethylene Polymers 0.000 description 4
- 239000004703 cross-linked polyethylene Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
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- HMUNWXXNJPVALC-UHFFFAOYSA-N 1-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C(CN1CC2=C(CC1)NN=N2)=O HMUNWXXNJPVALC-UHFFFAOYSA-N 0.000 description 2
- LDXJRKWFNNFDSA-UHFFFAOYSA-N 2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]ethanone Chemical compound C1CN(CC2=NNN=C21)CC(=O)N3CCN(CC3)C4=CN=C(N=C4)NCC5=CC(=CC=C5)OC(F)(F)F LDXJRKWFNNFDSA-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 239000000987 azo dye Substances 0.000 description 2
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- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 2
- 239000000347 magnesium hydroxide Substances 0.000 description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- BZQKBFHEWDPQHD-UHFFFAOYSA-N 1,2,3,4,5-pentabromo-6-[2-(2,3,4,5,6-pentabromophenyl)ethyl]benzene Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1CCC1=C(Br)C(Br)=C(Br)C(Br)=C1Br BZQKBFHEWDPQHD-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229910019440 Mg(OH) Inorganic materials 0.000 description 1
- MXRIRQGCELJRSN-UHFFFAOYSA-N O.O.O.[Al] Chemical compound O.O.O.[Al] MXRIRQGCELJRSN-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000001000 anthraquinone dye Substances 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000007810 chemical reaction solvent Substances 0.000 description 1
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- 229920006037 cross link polymer Polymers 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
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- 239000012467 final product Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920001179 medium density polyethylene Polymers 0.000 description 1
- 239000004701 medium-density polyethylene Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 239000013502 plastic waste Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- IZMJMCDDWKSTTK-UHFFFAOYSA-N quinoline yellow Chemical compound C1=CC=CC2=NC(C3C(C4=CC=CC=C4C3=O)=O)=CC=C21 IZMJMCDDWKSTTK-UHFFFAOYSA-N 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 229920006305 unsaturated polyester Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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- 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
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
-
- 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
- B29C48/001—Combinations of extrusion moulding with other shaping operations
-
- 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
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
-
- 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/802—Heating
-
- 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
-
- 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
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
본 발명은 탈가교화 폴리에틸렌을 사용하여 재활용 휨 전선관 조성물을 제조하는 방법에 관한 것이다. 구체적으로, 휨 전선관에 사용되는 폴리에틸렌을 탈가교화 폴리에틸렌을 대체함으로써, 경제성이 뛰어난 재활용 휨 전선관의 조성물 및 이의 제조방법에 관한 것이다. The present invention relates to a method of making a recycled bent conduit composition using decrosslinked polyethylene. Specifically, it relates to a composition of a recycled bent conduit having excellent economic efficiency and a method for manufacturing the same by replacing polyethylene used in the bent conduit with decrosslinked polyethylene.
Description
본 발명은 탈가교된 재생 폴리에틸렌을 포함하는 성형체 조성물을 활용한 휨 (flexible) 전선관의 제조방법에 관한 것이다. The present invention relates to a method for manufacturing a flexible conduit using a molded article composition containing decrosslinked recycled polyethylene.
폴리에틸렌은 에틸렌의 중합으로 생기는 사슬 모양의 고분자 화합물로서, 압출성형(壓出成形), 중공성형(中空成型) 등의 방법으로 각종 용기, 포장용 필름, 섬유, 파이프, 패킹등으로 생산되고 있으며, 국내에서는 플라스틱으로 잘 알려져 있다.Polyethylene is a chain-shaped polymer compound produced by the polymerization of ethylene. It is produced as various containers, packaging films, fibers, pipes, packings, etc. by methods such as extrusion molding and hollow molding. is well known for its plastics.
이와 관련하여, 최근 코로나19로 인해 비대면 문화가 일상이 되면서 택배와 배달 포장이 크게 늘고 1회용품 사용이 급증하면서 폴리에틸렌을 포함하는 플라스틱 쓰레기가 폭증하고 있다. In this regard, as the non-face-to-face culture has recently become daily life due to Corona 19, courier and delivery packaging have greatly increased and the use of disposable products has soared, and plastic waste including polyethylene is exploding.
이런 상황에서, 최근 여러 국가 및 기업들은 탄소중립을 선언하면서, 자원순환형 사회를 구현하기 위해 폐플라스틱, 특히 폴리에틸렌, 우레탄, 페놀, 우레아, 에폭시, 멜라민, 불포화 폴리에스테르 등 폐 열경화성 수지인 폐 가교 고분자의 재활용을 위한 기술개발에 많은 투자를 하겠다고 선언하였으나, 아직은 배출되는 플라스틱의 일부만 재활용이 되고 있는 실정이다.In this situation, many countries and companies have recently declared carbon neutrality, and waste plastics, especially waste thermosetting resins such as polyethylene, urethane, phenol, urea, epoxy, melamine, and unsaturated polyester, are used to realize a resource recycling society. Although it has announced that it will invest heavily in the development of technology for recycling polymers, only a part of the plastics emitted are still being recycled.
한편, 합성 수지제로 이루어진 휨 (flexible) 전선관은 배선에서 전선을 보호하기 위해 사용하며, PF(Plastic flexible)관 및 CD관(Combine Duct)을 총칭하여 이르는 단어이다. On the other hand, a flexible conduit made of synthetic resin is used to protect electric wires in wiring, and is a generic term for PF (Plastic Flexible) pipe and CD pipe (Combine Duct).
휨 전선관은 파부형 전선관으로 가요성(flexibility)을 높여 기계적 강도와 복원력이 우수하고, 따라서 전선 보호 및 콘크리트 매설용으로 주로 사용된다. 휨 전선관은 대부분 폴리에틸렌을 주성분으로 사용하는데, 폴리에틸렌은 내식성과 내화학성이 우수하고 열에 안정적이며, 스틸관에 비해 결로현상이 적고 무게가 가벼워 전선 보호용 및 전기설비공사에 사용되고 있다. Bending conduit is a corrugated conduit that has excellent mechanical strength and resilience by increasing flexibility, and is therefore mainly used for wire protection and concrete burial. Most of the bent conduits use polyethylene as the main component. Polyethylene has excellent corrosion resistance and chemical resistance, is stable against heat, has less dew condensation compared to steel pipes, and is light in weight, so it is used for wire protection and electrical facility construction.
이 때, 휨 전선관에 사용되는 폴리에틸렌을 "재활용 또는 재생 폴리에틸렌"으로 대체하여 휨 전선관을 제조하는 시도가 있으나, 제품 가공 시 치수 안정성 (dimensional stability) 과 물성 저하로 인한 제품에 하자가 발생된다는 문제점이 있다. At this time, there is an attempt to manufacture a bent conduit by replacing the polyethylene used in the bent conduit with "recycled or recycled polyethylene", but there is a problem that defects occur in the product due to dimensional stability and deterioration of physical properties during product processing. there is.
위와 같이 버려지는 폴리에틸렌을 재활용한 재생 폴리에틸렌을 사용하더라도, 가공성이 좋고 장기간 우수한 내구성과 충격에 대한 복원력을 구현할 수 있으며, 물성이 저하되지 않는 휨 전선관을 제조할 수 있는 조성물이나 이를 활용하여 휨 조성물을 제조하는 방법에 대한 연구가 필요한 실정이다. Even if recycled polyethylene recycled from discarded polyethylene is used as described above, it is possible to realize excellent long-term durability and resilience against impact with good processability, and a composition capable of manufacturing a bent conduit without deterioration in physical properties, or a bending composition using the same There is a need for research on manufacturing methods.
본 발명은 상기한 문제점을 해결하기 위한 것으로, The present invention is to solve the above problems,
본 발명이 해결하고자 하는 제1 과제는, 탈가교된 재생 폴리에틸렌을 포함하는 성형체 조성물 및 이를 활용하여 휨 전선관을 제조하는 방법을 제공하는 것이다.A first problem to be solved by the present invention is to provide a molded article composition containing decrosslinked recycled polyethylene and a method for manufacturing a bent conduit using the same.
본 발명이 해결하고자 하는 제2 과제는 기존 휨 전선관에 사용되는 폴리에틸렌을 탈가교된 재생 폴리에틸렌으로 대체하여, 가교 고분자의 재활용성을 높일 수 있는 방법을 제공하는 것이다. A second problem to be solved by the present invention is to provide a method for increasing the recyclability of a crosslinked polymer by replacing polyethylene used in an existing bent conduit with recycled polyethylene that is decrosslinked.
본 발명이 해결하고자 하는 제3 과제는 기존 휨 전선관에 사용되는 폴리에틸렌을 탈가교된 재생 폴리에틸렌으로 대체하더라도, 압출강도, 인장강도 등의 물성을 향상시킬 수 있는 휨 전선관의 제조방법을 제공하는 것이다. A third problem to be solved by the present invention is to provide a method for manufacturing a bent conduit capable of improving physical properties such as extrusion strength and tensile strength, even if polyethylene used in existing bent conduits is replaced with decrosslinked recycled polyethylene.
본 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 청구범위에 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.
상기 과제를 해결하기 위한 본 발명의 일 실시예에 따른 탈가교된 재생 폴리에틸렌을 포함하는 성형체 조성물은 성형체 조성물 총 중량을 기준으로 탈가교된 재생 폴리에틸렌 수지 92 중량% 내지 98 중량%, 난연제 5 내지지 15 중량%, 착색제 0.5 중량% 내지 1 중량%를 포함하는 성형체 조성물을 제공한다. A molded article composition containing decrosslinked recycled polyethylene according to an embodiment of the present invention for solving the above problems includes 92% to 98% by weight of the decrosslinked recycled polyethylene resin based on the total weight of the molded article composition, and 5 to 5 flame retardants. Provided is a molded article composition comprising 15% by weight and 0.5% to 1% by weight of a colorant.
본 발명의 성형체 조성물을 사용하여 휨 전선관을 제조하는 방법은A method for manufacturing a bent conduit using the molded article composition of the present invention
(a) 탈가교된 재생 폴리에틸렌, 난연제, 착색제를 혼합하여 성형체 조성물을 제조하는 단계;(a) preparing a molded article composition by mixing decrosslinked recycled polyethylene, a flame retardant, and a colorant;
(b) 상기 (a) 단계의 성형체 조성물을 압출기를 통과시켜 압출하는 단계; (b) extruding the molded article composition of step (a) through an extruder;
(c) 상기 압출된 성형체 조성물을 금형 장치에 투입하여 휨 전선관 형태로 성형하는 단계; (c) injecting the extruded molded body composition into a mold device and molding it into a bent conduit shape;
(d) 성형된 휨 전선관을 냉각수에서 냉각시키는 단계; (d) cooling the formed bent conduit in cooling water;
(e) 상기 (d) 단계에서 냉각시킨 휨 전선관을 인취기를 사용하여 인취하는 단계; 및 (e) taking out the bent conduit cooled in step (d) using a take-up machine; and
(f) 인취된 휨 전선관을 포장하는 단계를 포함한다.(f) wrapping the drawn bent conduit.
상기 과제의 해결 수단은, 본 발명의 특징을 모두 열거한 것은 아니다. 본 발명의 다양한 특징과 그에 따른 장점과 효과는 아래의 구체적인 실시예를 참조하여 보다 상세하게 이해될 수 있을 것이다.The solution to the above problems does not enumerate all the features of the present invention. Various features of the present invention and the advantages and effects thereof will be understood in more detail with reference to the following specific examples.
본 발명은 탈가교된 재생 폴리에틸렌을 포함하는 성형체 조성물 및 이를 활용하여 휨 전선관을 제조하는 방법을 제공함으로써, 재활용되지 못하고 소각되는 가교 폴리에틸렌을 재활용할 수 있게 한다.The present invention provides a molded article composition comprising decrosslinked recycled polyethylene and a method for manufacturing a bent conduit using the same, thereby enabling recycling of crosslinked polyethylene that is incinerated and not recycled.
본 발명에 따른 성형체 조성물 및 이를 사용하여 제조된 휨 전선관은 재생 폴리에틸렌을 사용함에도 불구하고, 열적 안정성이 높고 압축강도 및 인장강도와 같은 물성이 향상된 조성물을 제공할 수 있다.The molded article composition according to the present invention and the bent conduit manufactured using the same can provide a composition having high thermal stability and improved physical properties such as compressive strength and tensile strength, despite the use of recycled polyethylene.
상술한 효과와 더불어 본 발명의 구체적인 효과는 이하 발명을 실시하기 위한 구체적인 내용을 설명하면서 함께 기술한다.In addition to the above effects, specific effects of the present invention will be described together while explaining specific details for carrying out the present invention.
도 1은 본 발명에 따른 탈가교된 재생 폴리에틸렌을 사용하여 휨 전선관을 제조하는 제조방법의 순서도를 나타낸 것이다. 1 is a flow chart of a manufacturing method for manufacturing a bent conduit using decrosslinked recycled polyethylene according to the present invention.
이하 첨부된 도면과 설명을 참조하여 본 발명의 바람직한 실시예에 대한 원리를 상세히 설명한다. 다만, 하기에 도시되는 도면과 후술되는 설명은 본 발명의 특징을 효과적으로 설명하기 위한 여러 가지 방법 중에서 바람직한 실시 방법에 대한 것이며, 본 발명이 하기의 도면과 설명만으로 한정되는 것은 아니다.Hereinafter, the principles of preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings and description. However, the drawings shown below and the description below relate to preferred implementation methods among various methods for effectively explaining the features of the present invention, and the present invention is not limited to only the drawings and description below.
한편, 제1 또는 제2 등의 용어를 다양한 구성요소들을 설명하는데 사용될 수 있지만, 이런 용어들은 하나의 구성요소를 다른 구성요소로부터 구별하는 목적으로만 해석되어야 한다. 예를 들어, 제1 구성요소는 제2 구성요소로 명명될 수 있고, 유사하게 제2 구성요소는 제1 구성요소로도 명명될 수 있다.Meanwhile, terms such as first or second may be used to describe various components, but these terms should be interpreted only for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element.
단수의 표현은 문맥상 명백하게 다르게 뜻하지 않는 한, 복수의 표현을 포함한다. 본 명세서에서, "포함하다" 또는 "가지다" 등의 용어는 설명된 특징, 숫자, 단계, 동작, 구성요소, 부분품 또는 이들을 조합한 것이 존재함으로 지정하려는 것이지, 하나 또는 그 이상의 다른 특징들이나 숫자, 단계, 동작, 구성요소, 부분품 또는 이들을 조합한 것들의 존재 또는 부가 가능성을 미리 배제하지 않는 것으로 이해되어야 한다.Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "comprise" or "have" are intended to designate that the described feature, number, step, operation, component, part, or combination thereof exists, but one or more other features or numbers, It should be understood that the presence or addition of steps, operations, components, parts, or combinations thereof is not precluded.
다르게 정의되지 않는 한, 기술적이거나 과학적인 용어를 포함해서 여기서 사용되는 모든 용어들은 해당 기술 분야에서 통상의 지식을 가진 자에 의해 일반적으로 이해되는 것과 동일한 의미를 가진다. 일반적으로 사용되는 사전에 정의되어 있는 것과 같은 용어들은 관련 기술의 문맥상 가지는 의미와 일치하는 의미를 갖는 것으로 해석되어야 하며, 본 명세서에서 명백하게 정의하지 않는 한, 이상적이거나 과도하게 형식적인 의미로 해석되지 않는다.Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in this specification, it should not be interpreted in an ideal or excessively formal meaning. don't
이하에서는 첨부한 도면을 참조로 하여 본 발명의 실시예에 따른 휨 전선관의 제조방법을 구체적으로 설명한다.Hereinafter, a method for manufacturing a bent conduit according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
본 발명은 탈가교된 재생 폴리에틸렌을 포함하는 성형체 조성물 및 이를 주원료로 하여 휨 전선관을 제조하는 방법에 관한 것이다. The present invention relates to a molded article composition comprising decrosslinked recycled polyethylene and a method for manufacturing a bent conduit using the same as a main raw material.
본 발명의 성형체 조성물은 탈가교된 재생 폴리에틸렌 수지, 난연제, 착색제를 포함할 수 있다. The molded article composition of the present invention may include a decrosslinked recycled polyethylene resin, a flame retardant, and a colorant.
일반적으로 고분자에 있어서 가교(crosslinked)란 탄화수소 고분자 사슬을 결합시키는 것을 의미하며, 탈가교(de-crosslinked)란 가교화된 탄화수소 고분자의 결합 사슬을 끊는 것을 의미한다. 본 발명에서 사용하는 성형체 조성물은 '탈가교된' 재생 폴리에틸렌을 사용한 것을 특징으로 한다. In general, in polymers, crosslinking means linking hydrocarbon polymer chains, and de-crosslinking means breaking the link chains of crosslinked hydrocarbon polymers. The molded article composition used in the present invention is characterized by using 'decrosslinked' recycled polyethylene.
본 발명에 따른 성형체 조성물의 주성분은 탈가교된 재생 폴리에틸렌이다. 폴리에틸렌이 아닌 재생 폴리에틸렌을 사용하여 원재료 비용을 절감함과 동시에 자원 재활용 측면에서 환경 친화적인 이점이 있다. 나아가 '탈가교된' 재생 폴리에틸렌을 사용하여 '가교된' 폴리에틸렌 수지보다 재활용성을 높일 수 있다.The main component of the molded body composition according to the invention is decrosslinked recycled polyethylene. By using recycled polyethylene rather than polyethylene, raw material costs are reduced and at the same time, there is an environmentally friendly advantage in terms of resource recycling. Furthermore, by using 'de-crosslinked' recycled polyethylene, recyclability can be increased compared to 'crosslinked' polyethylene resin.
본 발명에 따른 성형체 조성물의 탈가교된 재생 폴리에틸렌은 분자량이 80,000 내지 380,000인 재생 폴리에틸렌을 탈가교화시킨 것일 수 있다. The decrosslinked recycled polyethylene of the molded article composition according to the present invention may be decrosslinked recycled polyethylene having a molecular weight of 80,000 to 380,000.
구체적으로, 본 발명의 탈가교된 재생 폴리에틸렌은 폐가교 폴리에틸렌을 동방향 이축 압출기(CO-ROTATING TWIN SCREW EXTRUDER)를 통해 탈가교화시키는데, 초임계 또는 아임계 상태의 1 내지 20%(v/v) 알코올류를 포함하는 반응용매에 폐가교 폴리에틸렌을 침지시키고, 300 내지 360oC의 온도 및 30 내지 150bar 압력 조건 하에서 탈가교화되어 재생된 폴리올레핀 수지로 전환된다.Specifically, the decrosslinked recycled polyethylene of the present invention decrosslinks waste crosslinked polyethylene through a co-rotating twin screw extruder (CO-ROTATING TWIN SCREW EXTRUDER), supercritical or subcritical 1 to 20% (v / v) Waste cross-linked polyethylene is immersed in a reaction solvent containing alcohol, and decross-linked under conditions of a temperature of 300 to 360 ° C and a pressure of 30 to 150 bar to convert into a recycled polyolefin resin.
본 발명에 따른 성형체 조성물의 탈가교된 재생 폴리에틸렌의 가교도는 0 내지 20%일 수 있다. 특히, 상기 범위의 가교도 함량과 같이 탈가교화를 100% 진행하지 않고 일부 가교화된 사슬을 남겨둠으로써, 폴리에틸렌을 재활용할 때 물성 저감을 방지할 수 있다. The degree of crosslinking of the decrosslinked recycled polyethylene of the molded article composition according to the present invention may be 0 to 20%. In particular, by leaving some crosslinked chains without 100% decrosslinking, such as the crosslinking degree content in the above range, it is possible to prevent a decrease in physical properties when recycling polyethylene.
본 발명에 따른 성형체 조성물 중 탈가교된 재생 폴리에틸렌은 성형체 조성물 총 중량을 기준으로 85 중량% 내지 98 중량%, 바람직하게는 92 중량% 내지 98 중량%로 포함될 수 있다. The decrosslinked recycled polyethylene in the molded article composition according to the present invention may be included in an amount of 85% to 98% by weight, preferably 92% to 98% by weight based on the total weight of the molded article composition.
본 발명에 따른 성형체 조성물 중 탈가교된 재생 폴리에틸렌은 약 3 내지 6 mm의 평균 크기를 갖고, 좁은 크기 분포를 갖는 것을 특징으로 한다. 좁은 크기 분포는 표준편차로 설명할 수 있다. 좁은 크기 분포를 가지는 것은 매우 중요한데, 좁은 크기 분포를 가짐에 따라 안정적인 물성의 확보가 가능해진다. 좁은 크기 분포는 이하와 같이 정의될 수 있다. 탈가교된 재생 폴리에틸렌의 평균 크기를 D로 하고, 이 입자들을 모집단으로 해서 구한 표준편차를 S로 할 때, S≤0.004ХD를 충족시켜야 한다. 여기서, 0.004는 파라미터이며, 이 값이 작을수록 입자들 간 직경의 편차가 작다. The decrosslinked recycled polyethylene in the molded article composition according to the present invention is characterized by having an average size of about 3 to 6 mm and a narrow size distribution. A narrow size distribution can be explained by the standard deviation. It is very important to have a narrow size distribution, and stable physical properties can be secured by having a narrow size distribution. A narrow size distribution can be defined as follows. When the average size of decrosslinked recycled polyethylene is D and the standard deviation of these particles as a population is S, S≤0.004ХD must be satisfied. Here, 0.004 is a parameter, and the smaller the value, the smaller the deviation of the diameter between the particles.
여기서, 0.004는 파라미터이며, 이 값이 작을수록 입자들 간 직경의 편차가 작다.Here, 0.004 is a parameter, and the smaller the value, the smaller the deviation of the diameter between the particles.
본 발명에 따른 성형체 조성물 중 폴리에틸렌은 고밀도 폴리에틸렌, 저밀도 폴리에틸렌, 중밀도 폴리에틸렌에서 선택되는 어느 하나 또는 둘 이상이 혼합된 것을 사용할 수 있으며, 바람직하게는 고밀도 폴리에틸렌 및 저밀도 폴리에틸렌을 혼합하거나, 더 바람직하게는 고밀도 폴리에틸렌 만을 사용할 수 있다. 다만, 상술한 바와 같은 폴리에틸렌의 종류에 제한되는 것은 아니다.Among the molded article compositions according to the present invention, polyethylene may be any one selected from high-density polyethylene, low-density polyethylene, and medium-density polyethylene, or a mixture of two or more, preferably a mixture of high-density polyethylene and low-density polyethylene, or more preferably Only high-density polyethylene may be used. However, it is not limited to the type of polyethylene as described above.
본 발명에 따른 성형체 조성물 중 폴리에틸렌은 고밀도 폴리에틸렌 51 내지 99 중량부 및 저밀도 폴리에틸렌 수지 1 내지 49 중량부가 혼합된 것일 수 있으며, 바람직하게는 고밀도 폴리에틸렌 51 내지 70 중량부와 저밀도 폴리에틸렌 30 내지 49 중량부로 혼합된 것일 수 있고, 이 때 고밀도 폴리에틸렌 함량이 저밀도 폴리에틸린 함량보다 큰 것이 바람직하다. Polyethylene in the molded article composition according to the present invention may be a mixture of 51 to 99 parts by weight of high-density polyethylene and 1 to 49 parts by weight of low-density polyethylene resin, preferably 51 to 70 parts by weight of high-density polyethylene and 30 to 49 parts by weight of low-density polyethylene. In this case, it is preferable that the high-density polyethylene content is greater than the low-density polyethylene content.
본 발명에 따른 성형체 조성물 중 난연제는 성형체 조성물 총 중량을 기준으로 1 중량% 내지 20 중량%, 바람직하게는 3 중량% 내지 20 중량%, 더 바람직하게는 5 중량% 내지 15 중량%로 포함될 수 있다. 이 때 상기 난연제는 수산화마그네슘(Mg(OH)2), 수산화알루미늄(Al(OH)3), DBDPE (Decabromodiphenyl ethane) 및 이들의 혼합물로 이루어진 군에서 선택된 것일 수 있다. 본 발명의 성형체 조성물을 활용할 시, 난연제의 함량이 상기 하한치 미만일 경우에는 충분한 난연성을 확보하지 못할 우려가 있어 바람직하지 않고, 난연제의 함량이 상기 상한치를 초과할 경우에는 폴리에틸렌 대비 과도한 무기 난연제의 함량으로 인하여 불량이 발생할 가능성이 높음과 더불어 난연제의 응집현상이 빈번하게 발생하여 난연성을 부여하지 못할 우려가 있어 바람직하지 않다. 이 때, 탈가교된 재생 폴리에틸렌의 평균 크기가 D가 S≤0.004ХD를 만족시킬 경우, 난연제가 고르게 분산되도록 할 수 있다. 탈가교된 재생 폴리에틸렌의 입자 크기 균질해짐에 따라 난연제 역시 고르게 분산되는 것으로 생각된다.The flame retardant in the molded article composition according to the present invention may be included in an amount of 1% to 20% by weight, preferably 3% to 20% by weight, more preferably 5% to 15% by weight based on the total weight of the molded article composition. . In this case, the flame retardant may be selected from the group consisting of magnesium hydroxide (Mg(OH) 2 ), aluminum hydroxide (Al(OH) 3 ), DBDPE (Decabromodiphenyl ethane), and mixtures thereof. When using the molded article composition of the present invention, if the content of the flame retardant is less than the lower limit above, it is undesirable because there is a concern that sufficient flame retardancy may not be secured. In addition to the high possibility of occurrence of defects due to this, aggregation of the flame retardant frequently occurs, which is undesirable because there is a concern that flame retardancy may not be imparted. At this time, when the average size of the decrosslinked recycled polyethylene satisfies S≤0.004ХD, the flame retardant can be evenly dispersed. As the particle size of the decrosslinked recycled polyethylene becomes homogeneous, the flame retardant is also thought to be evenly dispersed.
본 발명에 따른 성형체 조성물 중 착색제는 0.1 중량% 내지 1.5 중량%, 바람직하게는 0.3 중량% 내지 1.5 중량%, 더 바람직하게는 0.5 중량% 내지 1 중량%로 포함될 수 있다.The colorant in the molded article composition according to the present invention may be included in an amount of 0.1 wt% to 1.5 wt%, preferably 0.3 wt% to 1.5 wt%, and more preferably 0.5 wt% to 1 wt%.
이 때 상기 착색제는 아조 염료, 퀴노프탈론 염료 및 안트라퀴논 염료 및 이들의 혼합물로 이루어진 군에서 선택된 것일 수 있다.In this case, the colorant may be selected from the group consisting of azo dyes, quinophthalone dyes, anthraquinone dyes, and mixtures thereof.
한편, 본 발명에 따른 성형체 조성물은 조성물의 물성에 크게 영향을 미치지 않는 범위 내에서 물성을 보완하기 위하여 첨가제를 더 포함할 수 있다. 예컨대 탈크, 마이카, 탄산칼슘, 카본블랙, 칼슘설페이트, 마그네슘옥사이드, 실리카 및 스테아르산 칼슘, 목분 중에서 선택된 어느 하나 이상의 성분을 더 포함할 수 있으며, 이에 제한되는 것은 아니다. Meanwhile, the molded article composition according to the present invention may further include additives to supplement physical properties within a range that does not significantly affect the physical properties of the composition. For example, it may further include one or more components selected from talc, mica, calcium carbonate, carbon black, calcium sulfate, magnesium oxide, silica, calcium stearate, and wood powder, but is not limited thereto.
한편, 본 발명에 따른 성형체 조성물은 물리적 특성이 양호하여 휨 (flexible) 전선관 제조에 활용될 수도 있다.On the other hand, the molded article composition according to the present invention has good physical properties and can be used for manufacturing flexible conduits.
도 1은 본 발명에 따른 탈가교된 재생 폴리에틸렌을 이용하여 휨 전선관을 제조하는 방법의 순서도를 나타낸다. 도 1을 참조하면 본 발명에 따른 성형체 조성물을 사용하여 휨 전선관을 제조하는 방법은 다음과 같다. 1 shows a flow chart of a method for manufacturing a bent conduit using decrosslinked recycled polyethylene according to the present invention. Referring to Figure 1, a method for manufacturing a bent conduit using the molded article composition according to the present invention is as follows.
(a) 탈가교된 재생 폴리에틸렌, 난연제, 착색제를 혼합하여 성형체 조성물을 제조하는 단계;(a) preparing a molded article composition by mixing decrosslinked recycled polyethylene, a flame retardant, and a colorant;
(b) 상기 (a) 단계의 성형체 조성물을 압출기를 통과시켜 압출하는 단계; (b) extruding the molded article composition of step (a) through an extruder;
(c) 상기 압출된 성형체 조성물을 금형 장치에 투입하여 휨 전선관 형태로 성형하는 단계; (c) injecting the extruded molded body composition into a mold device and molding it into a bent conduit shape;
(d) 성형된 휨 전선관을 냉각수에서 냉각시키는 단계; (d) cooling the formed bent conduit in cooling water;
(e) 상기 (d) 단계에서 냉각시킨 휨 전선관을 인취기를 사용하여 인취하는 단계; 및 (e) taking out the bent conduit cooled in step (d) using a take-up machine; and
(f) 인취된 휨 전선관을 포장하는 단계를 포함하는 휨 전선관을 제조하는 방법을 제공한다.(f) a method for manufacturing a bent conduit comprising the step of wrapping the drawn bent conduit.
이하에서는, 휨 전선관의 제조방법을 보다 상세히 설명한다.Hereinafter, the manufacturing method of the bent conduit will be described in more detail.
본 발명에 따른 탈가교된 재생 폴리에틸렌을 포함하는 성형체 조성물을 사용한 휨 전선관의 제조방법은 (a) 탈가교된 재생 폴리에틸렌, 난연제, 착색제를 혼합하여 성형체 조성물을 제조하는 단계를 포함한다.The method for manufacturing a bent electrical conduit using a molded article composition comprising decrosslinked recycled polyethylene according to the present invention includes (a) preparing a molded article composition by mixing decrosslinked recycled polyethylene, a flame retardant, and a colorant.
상술한 바와 같이, 휨 전선관의 제조방법에 사용되는 성형체 조성물에 포함된 탈가교된 재생 폴리에틸렌은 분자량이 80,000 내지 380,000인 재생 폴리에틸렌을 탈가교화시킨 것일 수 있고, 상기 탈가교된 재생 폴리에틸렌의 가교도는 0 내지 20%일 수 있다. As described above, the decrosslinked recycled polyethylene included in the molded article composition used in the manufacturing method of the bent conduit may be decrosslinked recycled polyethylene having a molecular weight of 80,000 to 380,000, and the degree of crosslinking of the decrosslinked recycled polyethylene is 0 to 20%.
본 발명에 따른 휨 전선관의 제조방법은 (b) 상기 (a) 단계의 성형체 조성물을 압출기를 통과시켜 압출하는 단계를 포함한다.The manufacturing method of the bent conduit according to the present invention includes (b) extruding the molded article composition of step (a) through an extruder.
본 발명에 따른 휨 전선관의 제조방법에 있어서, 상기 (b) 단계는 압출기 내부를 150 ℃ 내지 300 ℃ 바람직하게는 170 ℃ 내지 250 ℃ 로 유지시켜, 통과되는 성형체 조성물을 용융된 상태로 유지시킬 수 있다. 특히, 본 발명의 압출기 내 온도는 탈가교된 재생 폴리에틸렌의 가교도 (즉, 0 내지 20%)를 고려한 온도범위로, 상기 온도 범위를 만족할 경우, 탈가교된 폴리에틸렌의 성형에 유리하도록 점성이 맞추어질 수 있다.In the manufacturing method of the bent conduit according to the present invention, the step (b) maintains the inside of the extruder at 150 ° C to 300 ° C, preferably 170 ° C to 250 ° C, so that the molded article composition passing through can be maintained in a molten state. there is. In particular, the temperature in the extruder of the present invention is a temperature range considering the degree of crosslinking (ie, 0 to 20%) of the decrosslinked recycled polyethylene, and when the temperature range is satisfied, the viscosity is adjusted to be advantageous for molding the decrosslinked polyethylene. can lose
힌편, 본 발명에 따른 휨 전선관의 제조방법에 있어서, 상기 (b) 단계의 압출기는 내부의 스크류를 10 내지 70 rpm 바람직하게는 20 내지 50 rpm의 속도로 성형체 조성물을 이송시키면서 압출시킬 수 있다.On the other hand, in the manufacturing method of the bent conduit according to the present invention, the extruder in step (b) extrudes while conveying the molded article composition at a speed of 10 to 70 rpm, preferably 20 to 50 rpm.
본 발명에 따른 휨 전선관의 제조방법은 (c) 상기 압출된 성형체 조성물을 금형 장치에 투입하여 휨 전선관 형태로 성형하는 단계를 포함한다.The method for manufacturing a bent conduit according to the present invention includes the step of (c) putting the extruded molded article composition into a mold device and molding it into a bent conduit shape.
본 발명에 따른 휨 선관의 제조방법에 있어서, 상기 (c) 단계에서는 압출되어 나오는 압출된 성형체 조성물을 8 내지 15 m/min의 선속으로 성형장치를 통과하여 휨 전선관 형태로 배출된다. In the method for manufacturing a bent conduit according to the present invention, in step (c), the extruded molded body composition is extruded through a forming device at a speed of 8 to 15 m/min and discharged in the form of a bent conduit.
이 때, 상기 선속을 초과하여 성형될 경우, 최종 제품인 성형 품질이 양호하지 못할 수 있다. 특히, 탈가교화가 진행된 폴리에틸렌이기에 폴리에틸렌의 물성, 예컨대 인장강도, 압출강도 등이 가교도가 높은 폴리에틸렌보다는 약하기 때문에 상기 선속을 초과하여 성형될 경우, 성형품인 휨 전선관의 품질이 양호하지 못한 것으로 생각된다.At this time, if the molding is performed exceeding the above line speed, the molding quality of the final product may not be good. In particular, since polyethylene has undergone decrosslinking, the physical properties of polyethylene, such as tensile strength and extrusion strength, are weaker than those of polyethylene with a high degree of crosslinking.
한편, 상기 금형 장치는 공지된 금형 장치를 사용할 수 있으며, 예를 들어코르게이트를 사용할 수 있고, 이에 한정되는 것은 아니다. Meanwhile, the mold device may use a known mold device, for example, a corgate may be used, but is not limited thereto.
본 발명에 따른 휨 전선관의 제조방법은 (d) 성형된 휨 전선관을 냉각수에서 냉각시키는 단계를 포함한다.A method of manufacturing a bent conduit according to the present invention includes the step of (d) cooling the formed bent conduit in cooling water.
본 발명에 따른 휨 선관의 제조방법에 있어서 상기 (d) 단계는 휨 전선관으로 성형되어 금형 장치에 배출되는 되는 성형품을 0 내지 30℃, 바람직하게는 5 내지 20℃의 냉각수에서 냉각시키는 단계이다. 냉각수에 성형된 휨 전선관을 냉각시킴으로써, 휨 전선관의 형상을 유지시킬 수 있다.In the method of manufacturing a bent conduit according to the present invention, the step (d) is to cool the molded article molded into a bent conduit and discharged to the mold device in cooling water at 0 to 30 ° C, preferably 5 to 20 ° C. By cooling the molded bent conduit in cooling water, the shape of the bent conduit can be maintained.
본 발명에 따른 휨 전선관의 제조방법은 (e) 상기 (d) 단계에서 냉각시킨 휨 전선관을 인취기를 사용하여 인취하는 단계를 포함한다.The manufacturing method of the bent conduit according to the present invention includes (e) taking out the bent conduit cooled in step (d) using a take-up machine.
본 발명에 따른 휨 선관의 제조방법에 있어서, 상기 (e) 단계의 인취 단계는 냉각된 휨 전선관을 600 rpm 내지 800rpm 속도로 작동되는 인취기에서 인취될 수 있다.In the method for manufacturing a bent conduit according to the present invention, in the taking-out step of step (e), the cooled bent conduit may be taken in a take-up machine operated at a speed of 600 rpm to 800 rpm.
본 발명에 따른 휨 전선관의 제조방법은 (f) 인취된 휨 전선관의 내외면이 원형상태를 유지하도록 규격화된 휨 전선관 형상을 갖는 구조물에 상기 인취된 전선관을 통과시켜 권취기에 정해진 길이만큼 권취된 후 절단하여 포장하는 단계를 포함한다. In the manufacturing method of the bent conduit according to the present invention, (f) the drawn conduit is passed through a structure having a standardized bent conduit shape so that the inner and outer surfaces of the bent conduit maintain a circular state, and after being wound by a predetermined length on a winding machine It includes the step of cutting and packaging.
이하 실시예 및 비교예를 바탕으로 본 발명을 더욱 상세히 설명한다. 다만 하기 실시예 및 비교예는 본 발명을 더욱 상세히 설명하기 위한 하나의 예시일 뿐, 본 발명이 하기 실시예 및 비교예에 의해 제한되는 것은 아니다.The present invention will be described in more detail based on the following Examples and Comparative Examples. However, the following Examples and Comparative Examples are only one example for explaining the present invention in more detail, and the present invention is not limited by the following Examples and Comparative Examples.
실시예 - 탈가교된 재생 폴리에틸렌을 사용하는 휨 전선관의 제조EXAMPLES - Preparation of flexed conduit using decrosslinked recycled polyethylene
제조예 1 - 탈가교된 재생 폴리에틸렌 제조Preparation Example 1 - Preparation of decrosslinked recycled polyethylene
이하의 방법으로 탈가교된 재생 폴리에틸렌(Polyethylene, PE)을 제조하였다. 가교 고밀도 폴리에틸렌(Crosslinking Highdensity Polyethylene, PEX)을 4 mm 이하로 분쇄하고, 동방향 이축 압출기에 주입하여 혼련, 용융, 탈가교화 반응을 연속적으로 진행하여 가교도가 20% 미만 탈가교된 재생 폴리에틸렌을 제조하였다. 이 때 300 내지 360℃의 반응온도 및 30 내지 150bar의 반응압력 하의 동방향 이축 압출기 내에서 탈가교화 반응을 진행하였으며, 효과적으로 탈가교화 반응을 시키기 위해 에탄올을 주입하여 아임계/초임계 상태의 분위기에서 탈가교화를 진행하였다. 이후 펠렛타이즈를 이용해 탈가교된 재생 폴리에틸렌을 6 mm 미만으로 컷팅하여 펠렛 형태로 제조하였다.Recycled polyethylene (Polyethylene, PE) was prepared by the following method. Crosslinking High Density Polyethylene (PEX) was pulverized to a size of 4 mm or less, injected into a twin-screw extruder in the same direction, and kneading, melting, and decrosslinking reactions were continuously performed to produce recycled polyethylene with a crosslinking degree of less than 20%. . At this time, the decrosslinking reaction was carried out in a co-direction twin screw extruder at a reaction temperature of 300 to 360 ° C and a reaction pressure of 30 to 150 bar, and ethanol was injected to effectively decrosslink the reaction in a subcritical / supercritical atmosphere. Decrosslinking was performed. Thereafter, the decrosslinked recycled polyethylene was cut to less than 6 mm using pelletization to prepare a pellet form.
제조예 2 - 휨 전선관의 제조Manufacturing Example 2 - Manufacturing of Bend Conduit
본 제조예에서 제조되는 휨 전선관은 탈가교된 재생 폴리에틸렌을 포함하는 성형체 조성물로만 제조된 휨 전선관이다.The bent conduit produced in this manufacturing example is a bent conduit made only of a molded article composition containing decrosslinked recycled polyethylene.
구체적으로, 탈가교된 재생 폴리에틸렌 94 중량 %, 수산화마그네슘 5 중량 %, 아조 염료 1 중량 %의 함량으로 원료를 혼합하여 성형체 조성물을 제조하였다. 제조된 성형체 조성물을 [표 1]의 온도로 설정된 압출기에 투입시키고, 스크류의 회전속도를 50 rpm으로 회전시켜 혼련, 용융, 가공 과정을 거쳤다. 이후, 압출물을 다이로 배출시킨 후 코르케이트 장치를 사용하여 휨 전선관 형태로 성형시켰다. 이후, 성형된 휨 전선관을 5 ℃의 냉각수에서 냉각하였다. 구체적인 조건은 아래 [표 1]에 기재하였다. Specifically, a molded article composition was prepared by mixing raw materials in an amount of 94% by weight of decrosslinked recycled polyethylene, 5% by weight of magnesium hydroxide, and 1% by weight of an azo dye. The prepared molded composition was put into an extruder set at the temperature shown in [Table 1], and kneaded, melted, and processed by rotating the screw at a rotational speed of 50 rpm. Thereafter, the extrudate was discharged through a die and formed into a bent conduit shape using a corkate device. Thereafter, the formed bent conduit was cooled in cooling water at 5 °C. Specific conditions are described in [Table 1] below.
제조예 3 - 휨 전선관 블렌딩 조성물의 제조Preparation Example 3 - Preparation of bent conduit blending composition
본 제조예에서 제조되는 휨 전선관은 탈가교된 재생 폴리에틸렌과 폴리에틸렌을 혼합하여 제조된 휨 전선관이다.The bent conduit manufactured in this manufacturing example is a bent conduit manufactured by mixing decrosslinked recycled polyethylene and polyethylene.
탈가교된 재생 폴리에틸렌과 폴리에틸렌을 아래 [표 2]의 비율로 혼합하여 폴리에틸렌 혼합물을 제조하였다. 제조예 2에서 탈가교된 재생 폴리에틸렌을 함량을 상기 폴리에틸렌 혼합물로 대체한 것을 제외하고는 제조예 2와 동일한 방법으로 제조하였다. A polyethylene mixture was prepared by mixing decrosslinked recycled polyethylene and polyethylene in the ratio shown in Table 2 below. It was prepared in the same manner as in Preparation Example 2, except that the content of the recycled polyethylene decrosslinked in Preparation Example 2 was replaced with the polyethylene mixture.
실험예 - 휨 전선관의 물성 테스트EXPERIMENTAL EXAMPLE - Physical property test of bent conduit
(1) 굴곡탄성률(N/㎟)(1) Flexural modulus (N/㎟)
ASTM D790의 규정에 의거, 시험 속도 10㎜/min으로 측정하였다.According to the rules of ASTM D790, it was measured at a test speed of 10 mm/min.
(2) 인장강도(N/㎟)(2) Tensile strength (N/㎟)
ASTM D638의 규정에 의거, 시험 속도 10㎜/min으로 측정하였다.According to the rules of ASTM D638, it was measured at a test speed of 10 mm/min.
(3) 안정성(3) Stability
상온(20℃)에서 48시간 정치 후 50℃로 온도를 높이고 8시간 후에 2,500kgf/㎠의 압력을 가하여 콘크리트와 성형체 표면의 균열 여부를 파악하여, 균열이 발생하지 않은 경우를 ○, 1mm 이하의 일부 균열이 발생한 경우를 △, 균열이 발생한 경우를 ×로 표기하였다.After standing for 48 hours at room temperature (20℃), raise the temperature to 50℃ and apply a pressure of 2,500kgf/㎠ after 8 hours to determine whether there is a crack on the surface of the concrete and molded body. The case where some cracks occurred was indicated as △, and the case where cracks occurred was indicated as ×.
상기 실험 결과에서 알 수 있듯, 탈가교된 재생 폴리에틸렌을 사용하였음에도 불구하고, 본 발명의 성형체 조성물 및 이를 활용한 제조방법으로 휨 전선관을 제조할 경우, 인장 강도와 굴곡 탄성률이 일반 폴리에틸렌을 사용한 것과 비교하여 양호한 수치를 나타냄을 확인할 수 있고, 안정성 역시 양호함을 확인할 수 있었다. As can be seen from the above experimental results, despite the use of decrosslinked recycled polyethylene, when a bent conduit is manufactured by the molded article composition of the present invention and the manufacturing method using the same, the tensile strength and flexural modulus are comparable to those of ordinary polyethylene. It can be confirmed that it shows good numerical values, and it can be confirmed that the stability is also good.
이상과 같이 본 발명에서는 특정된 사항들과 한정된 실시예에 의해 설명되었으나 이는 본 발명의 보다 전반적인 이해를 돕기 위해서 제공된 것일 뿐, 본 발명은 상기의 실시예에 한정되는 것은 아니며, 본 발명이 속하는 분야에서 통상의 지식을 가진 자라면 이러한 기재로부터 다양한 수정 및 변형이 가능하다.As described above, the present invention has been described with specific details and limited examples, but this is only provided to help a more general understanding of the present invention, the present invention is not limited to the above examples, and the field to which the present invention belongs Those skilled in the art can make various modifications and variations from these descriptions.
따라서, 본 발명의 사상은 설명된 실시예에 국한되어 정해져서는 아니되며, 후술하는 특허청구범위뿐 아니라 이 특허청구범위와 균등하거나 등가적 변형이 있는 모든 것들은 본 발명 사상의 범주에 속한다고 할 것이다.Therefore, the spirit of the present invention should not be limited to the described embodiments, and it will be said that not only the claims to be described later, but also all modifications equivalent or equivalent to these claims belong to the scope of the present invention. .
Claims (10)
(b) 상기 (a) 단계의 성형체 조성물을 압출기를 통과시켜 압출하는 단계;
(c) 상기 압출된 성형체 조성물을 금형 장치에 투입하여 휨 전선관 형태로 성형하는 단계;
(d) 성형된 휨 전선관을 냉각수에서 냉각시키는 단계;
(e) 상기 (d) 단계에서 냉각시킨 휨 전선관을 인취기를 사용하여 인취하는 단계; 및
(f) 인취된 휨 전선관을 포장하는 단계를 포함하는.
휨 전선관 제조방법.
(a) preparing a molded article composition by mixing decrosslinked recycled polyethylene, a flame retardant, and a colorant;
(b) extruding the molded article composition of step (a) through an extruder;
(c) injecting the extruded molded body composition into a mold device and molding it into a bent conduit shape;
(d) cooling the formed bent conduit in cooling water;
(e) taking out the bent conduit cooled in step (d) using a take-up machine; and
(f) wrapping the drawn bent conduit.
A method for manufacturing bent conduit.
상기 탈가교된 재생 폴리에틸렌은 분자량이 80,000 내지 380,000인 재생 폴리에틸렌을 탈가교화시킨 것인,
휨 전선관 제조방법.
According to claim 1,
The decrosslinked recycled polyethylene is decrosslinked recycled polyethylene having a molecular weight of 80,000 to 380,000,
A method for manufacturing bent conduit.
상기 탈가교된 재생 폴리에틸렌의 가교도는 0 내지 20%인 것인, 휨 전선관 제조방법.
According to claim 1,
The degree of crosslinking of the decrosslinked recycled polyethylene is 0 to 20%, a method for producing a bent conduit.
상기 성형체 조성물은
성형체 조성물 총 중량을 기준으로 탈가교된 재생 폴리에틸렌 92 중량% 내지 98 중량%, 난연제 5 중량% 내지 15 중량%, 착색제 0.5 중량% 내지 1 중량%로 포함하는 것인,
휨 전선관 제조방법.
According to claim 1,
The molded body composition is
Based on the total weight of the molded article composition, 92% to 98% by weight of decrosslinked recycled polyethylene, 5% to 15% by weight of a flame retardant, and 0.5% to 1% by weight of a colorant,
A method for manufacturing bent conduit.
상기 성형체 조성물은 탈크, 마이카, 탄산칼슘, 카본블랙, 칼슘설페이트, 마그네슘옥사이드, 실리카 및 스테아르산 칼슘, 목분 중에서 선택된 어느 하나 이상의 첨가제를 포함하는 것인,
휨 전선관 제조방법.
According to claim 1,
The molded body composition includes at least one additive selected from talc, mica, calcium carbonate, carbon black, calcium sulfate, magnesium oxide, silica, calcium stearate, and wood flour,
A method for manufacturing bent conduit.
상기 (b) 단계의 성형체 조성물을 압출기를 통과시킴에 있어서,
상기 압출기 내부의 온도는 150 ℃ 내지 300 ℃로 설정되고,
압출기 내부의 스크류는 10 내지 70 rpm로 회전시키면서 성형체 조성물을 이송시키는 것인, 휨 전선관 제조방법.
According to claim 1,
In passing the molded body composition of step (b) through an extruder,
The temperature inside the extruder is set to 150 ° C to 300 ° C,
A method for manufacturing a bent conduit, wherein the screw inside the extruder transfers the molded body composition while rotating at 10 to 70 rpm.
상기 (c) 단계는 압출된 성형체 조성물을 8 내지 15 m/min의 선속으로 성형장치를 통과시키는 것인, 휨 전선관 제조방법.
According to claim 1,
Wherein step (c) is to pass the extruded molded body composition through a molding device at a speed of 8 to 15 m/min.
상기 (d) 단계의 냉각수는 5 내지 20℃ 온도의 냉각수인 것인, 휨 전선관 제조방법.
According to claim 1,
The cooling water in step (d) is a cooling water having a temperature of 5 to 20 ° C.
상기 (e) 단계는 600 rpm 내지 800rpm 속도로 작동되는 인취기를 사용하여 인취하는 것인, 휨 전선관 제조방법.
According to claim 1,
The step (e) is a method of manufacturing a bent conduit, wherein the method of manufacturing a bent conduit is taken using a take-up machine operated at a speed of 600 rpm to 800 rpm.
A bent conduit manufactured using the manufacturing method of any one of claims 1 to 9.
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| KR20120030833A (en) | 2010-09-20 | 2012-03-29 | 박재영 | Recycling method and apparatus of crosslinked polyethylene |
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