• Title/Summary/Keyword: 소재 재활용

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Case Study on the Target Products for Applicable Uni-materailization (적용 가능한 유니소재화 대상제품 발굴 및 사례 연구)

  • Ju, Hong-Shin;Yun, Hye-Ri;Yeon, Seong-Mo;Ko, Kwan-Tae
    • Clean Technology
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    • v.19 no.2
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    • pp.173-183
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    • 2013
  • A various methodologies like eco product design, recycling, remanufacturing have been proposed for the increase of resource recirculation and energy saving worldwide. Uni-materialization in this paper, one of measures is presented. Uni-materialization is defined as the unification or simplification of material that is easy resource recycling and reduce waste generation at source during product design, manufacturing, delivery, use and disposal. This study developed calculates the qualitative and quantitative of assessment index for evaluating target products applicable uni-materialization. There are 9 assessment articles considered economic performance, technological property and environmental property and a study on target product applied assessment indexes. As a result it is possible for 3 target products to apply uni-materialization product except for a window blind, and the concrete concept of uni-materialization for improving objectivity of assessment index and the consideration of industrial distinct character are needed.

Trends of Recycling of Indium-Tin-Oxide (ITO) Target Materials for Transparent Conductive Electrodes (TCEs) (투명전극용 인듐 주석 산화물 타겟 소재의 재자원화 동향)

  • Hong, Sung-Jei;Lee, Jae Yong
    • Clean Technology
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    • v.21 no.4
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    • pp.209-216
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    • 2015
  • Indium-Tin-Oxide (ITO) is a material that is widely used for transparent conductive electrodes (TCEs). Indium (In), chief element of the ITO, is expected to be depleted in the near future owing to its high cost and limited reserves. To overcome the issue, ITO has to be retained by recycling redundant ITO targets after manufacturing processes. In this article, we proposed an efficient recycling way of the redundant ITO targets with investigation of the current recycling tendencies in domestic and foreign countries. As a result, it was revealed that only In is recycled from the redundant targets in domestic and Japan. As well, fabrication of TCEs is being researched with ITO nanoparticles solutions. However, since the TCEs fabricated with ITO target is superior to those with other materials, it is thought that establishment of regeneration technology of ITO itself is demanded for an efficient recycling and fabrication of ITO target.

Current Status on the Domestic Recycling of Magnesium (국내(國內) 마그네슘 리싸이클링 현황(現況))

  • Park, Hyung-Kyu;Kang, Min-Cheol
    • Resources Recycling
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    • v.20 no.3
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    • pp.3-11
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    • 2011
  • Magnesium has been used as parts of vehicles, case materials of notebook PC and mobile phone, and its demand has been increasing recently. So until now, there has little magnesium scraps from the end of life vehicles or electronic parts, and most scraps has been generated from magnesium processing lines such as melting, die casting and machining. It is to review the present status of magnesium recycling. Here, domestic demand of magnesium, recycling amount and technologies used in domestic recycling companies were surveyed in recent years. In 2010, 8,840 tons of magnesium scraps were processed and used as raw materials for die casting products. The recycling ratio was estimated as 32.5%.

Analysis of Recycled Raw Materials and Evaluation of Characteristics by Mixing Ratio for Recycling of Waste Vinyl (폐비닐 재활용을 위한 재생원료 분석 및 배합비율에 따른 특성 평가)

  • Ahn, Nak-Kyoon;Lee, Chan gi;Kim, Jung-Hwan;Park, Pil Hwan;Kim, Seung-Hwan;Yoon, Jin-Ho
    • Resources Recycling
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    • v.30 no.1
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    • pp.53-59
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    • 2021
  • Waste vinyl generated from household waste has been used as a solid refuse fuel (SRF) due to the presence of impurities such as soil, metal, and glass; however, the amount of SRF used has been decreasing owing to recent environmental problems, thereby necessitating the need for recycling. In this study, the mixed recycled raw material produced from household waste vinyl and polyethylene (PE) single recycled raw material produced from agricultural waste vinyl were examined. Raw material analysis revealed that waste vinyl was mainly composed of polyethylene, and approximately 2% of ash remained in the mixed recycled raw material, whereas no ash was found in the PE single recycled raw material. In addition, the analysis of tensile strength according to the mixing ratio of the two recycled raw materials revealed that the highest tensile strength was approximately 16 MPa under the heat treatment temperature of 200 ℃, compression pressure of 30 MPa, and a mixing ratio of 3:7 (mixed:PE single). In addition, the highest bending strength was approximately 39 MPa under the heat treatment temperature of 200 ℃, compression pressure of 30 MPa, and a mixing ratio of 3:7 (mixed:PE single). Therefore, the possibility of recycling waste vinyl was suggested by investigating the change in strength characteristics according to the mixing ratio of the recycled raw materials.

Development of Metal-free Pump and Uni-material Packaging for Cosmetics to Improve Recycling (재활용성 향상을 위한 화장품용 메탈프리 펌프 및 유니소재 패키징 개발)

  • Sang Kyu, Ryu;Ho Sang, Kang;Jae Young, Oh
    • KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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    • v.28 no.3
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    • pp.171-174
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    • 2022
  • Cosmetic packing materials tend to be difficult to recycle when discarded due to the cosmetic industry's pursuit of aesthetics, functionality, and high value-added design. Pump packaging, which is widely used for the good preservation and discharge of cosmetics contents, is difficult to be separated and recycled because of a metal spring, which is in charge of pump resilience. In this study, a polypropylene spring was developed to replace the existing metal spring to improve the recyclability of the pump packaging for cosmetics, and was uni-materialized by applying to the cosmetic packing materials with 0.2 ml of discharge amount. In addition, performance test was conducted to verify the equivalence with the existing metal spring pumps as grounds for the commercialization of metal-free uni material pump packaging. The decompression leak test showed no leakage and displayed 14.8~17.5 N of pressing strength, 2.3~8.8 % of deviation in dispensing volume, and 4 occasions of pumping for initial discharge.

Current Effective Recycling and Application Methods in Construction Waterproofing Industries (건설방수산업분야에서의 유효자원 재활용 및 응용 기술 현황)

  • Park, Jin-Sang;Kim, Sun-Do;Park, Wan-Goo;Kim, Dong-Bum;Lee, Jong-Yong;Oh, Sang-Keun
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.4 no.1
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    • pp.31-37
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    • 2016
  • This paper intends to analyze the roles of regulations and certifications within the construction market that affect the effective recycling and application methods of construction waterproofing industries. Certifications, eco-labels, green certification patents, and new excellent technologies obtained in construction waterproofing industries are studied. In accordance to the study results, it was determined that, a total of 38 items obtained eco-labels with effective recycling as the theme, 10 items with green certifications, and 8 items with New Excellent Technologies. Regarding the types of effective recycled resources, most of them were concerned with composite-polymer(EVA, PVC, etc.) materials, waste tire powder, waste rubber, etc., which indicated that there is a clear limitation in the variety of the materials that are eligible for effective recycling in the construction waterproofing industries.

Overview and Recent Development of Recycling Waste Refrigerators (폐(廢) 냉장고(冷藏庫) 재활용(再活用) 현황(現況)과 기술(技術) 전망(展望))

  • Yang, Hyunseok;Kim, Geon-Hong;Kong, Man-Sik;Park, Kiejin;Lee, Gwang Weon;Kim, Bo Saeng
    • Resources Recycling
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    • v.22 no.4
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    • pp.70-80
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    • 2013
  • Waste refrigerator is the most large amount of item being recycled and the recycling process is the most complicated in WEEE (Waste Electrical and Electronic Equipment) because refrigerator is biggest product and consists of various parts and materials such as ferrous, non-ferrous, and plastics. Recently, recycling process of waste refrigerator has been being more complex since large capacity 2 door refrigerators and standing Kimchi refrigerators with various material are distributed on custom market. In addition, recycling of valuable resource from waste refrigerator is mandatory by WEEEs recycling legislation; therefore, high efficiency recycling enough for economic and environment-friendly recovery of valuable resource through present technical situation analysis and comparison of recycling technologies of waste refrigerator with advanced country.

Synthesis of LiDAR-reflective Hollow-structured Black Materials and Recycling of Their Etched Waste for Semiconductor Epoxy Molding Compound (라이다 반사형 중공구조 검은색 물질의 개발 및 코어 에칭 폐액 재활용을 통한 반도체용 에폭시 몰딩 컴파운드 응용)

  • Ha-Yeong Kim;Min Jeong Kim;Jiwon Kim;Suk Jekal;Seon-Young Park;Jong Moon Jung;Chang-Min Yoon
    • Journal of the Korea Organic Resources Recycling Association
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    • v.31 no.1
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    • pp.5-14
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    • 2023
  • In this study, LiDAR-reflective black hollow-structured silica/titania(B-HST) materials are successfully synthesized by employing the NaBH4 reduction and etching method on silica/titania core/shell(STCS) materials, which also effectively enhance near-infrared(NIR) reflectance. Moreover, core-etched supernatant solutions are collected and recycled for the synthesis of extracted silica(e-SiO2) process, which successfully applies as filler materials for semiconductor epoxy molding compound(EMC). In detail, B-HST materials, fabricated by the sequential experimental steps of sol-gel, reduction, and sonication-mediated etching method, manifest blackness(L*) of 13.2 similar to black paint and excellent NIR reflectance(31.1%). Consequently, B-HST materials are successfully prepared as LiDAR-reflective black materials. Additionally, core-etched supernatant solution with silanol precursors are employed for synthesis of homogeneous silica filler materials via sol-gel method. As-synthesized silica fillers are incorporated with epoxy resin and carbon black for the preparation of semiconductor EMC. Experimentally synthesized EMC exhibits comparable mechanical-chemical properties to commercial EMC. Conclusively, this study successfully proposes designing procedure and practical experimental method for simultaneously synthesizing the NIR-reflective black materials for self-driving vehicles and EMC materials for semiconductors, which are materials suitable for the industrial 4.0 era, and presented their applicability in future industries.

Disassembly and Compositional Analysis of Waste LCD Displays (폐(廢) 디스플레이의 해체(解體) 및 성분조사(成分調査))

  • Lee, Sungkyu;Kang, Leeseung;Lee, Chan Gi;Hong, Myung Hwan;Cho, Sung-Su;Hong, Hyun Seon
    • Resources Recycling
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    • v.22 no.2
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    • pp.29-36
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    • 2013
  • Although Korean domestic production of flat panel displays totalled more than 48 trillion KRW in 2007, most of the flat panel display wastes have been land-filled or incinerated, which greatly overshadows Korean national prestige as a world leading producer and developer of flat panel display devices. Countries such as Japan or EU possess quite limited land-fill capability and have sought ways to dispose of WEEEs from environment-friendly perspective rather than recovery of valuable materials from the wastes. Considering relatively short cycle of about 5 years for flat panel display devices, it is estimated that more than 5 million units will be accumulated as wastes by 2015. Urban mining is a most suitable countermeasures against China's monopoly of rare and rare earth metals, which are contained in flat panel display wastes. Therefore, materials recycling of waste LCD units has to be developed and commercialized soon enough for economic and environment-friendly recovery of valuable resources hidden in LCD wastes.

Eco-Packaging Technology (세미나 - 생분해성 에코 패키징 국내외 기술 및 산업화 동향)

  • (사)한국포장협회
    • The monthly packaging world
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    • s.201
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    • pp.118-128
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    • 2010
  • 전 세계적으로 녹색성장, 이산화탄소 절감, 지구온난화 문제 등이 보다 중요시되면서, 기존 규제 일변도 정책, 생분해 플라스틱 중심으로 빠르게 분해가 되는 소재로 진행되고 있던 에코패키징에 대한 패러다임이 변화되고 있다. PVC, 스티로폼 등 인체 무해성 관련 소재에 대한 강력한 규제가 시행되고 있으며, 생분해성 플라스틱 감량을 우선시하고 있다. 또한 강도, 생산성, 재활용 용이성 등 포장재의 기본 기능을 중시하면서 생분해 플라스틱을 이용한 일회용품에서 바이오 플라스틱을 중심으로 자동차, 화장품, 산업용 완충재, 멀칭필름, 문구 파일류 등 다양하고 포괄적인 분야로의 상품화 적용이 빠르게 되고 있다.

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