• Journal of the Korea Concrete Institute
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• v.17 no.4 s.88
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• pp.499-504
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• 2005

Polymer concrete shows excellent mechanical properties and chemical resistance compared with conventional normal cement concrete. The polymer concrete Is drawing a strong interest as high-performance materials in the construction industry Resins using recycled PET offer the possibility of a lower source cost of materials for making useful polymer concrete products. Also the recycling of PET in polymer concrete would help solve some of the solid waste problems Posed by plastics and save energy. An objective of this paper is to estimate the damage of sulfuric acid, through investigating recycled PET polymer concrete, immersed at sulfuric acid solution for 84 days. As a result of testing, recycled PET PC, used $CaCO_3$ as filler, makes a problem of appearance and strength if they are exposed for long term at corrosion environment. On the other hand, recycled PET PC, used fly-ash as filler, had less effect on decrease in weight and strength. Recycled PET PC is excellent chemical resistance, resulting in the role of unsaturated polyester resin which consists of polymer chain structure accomplishes bond of aggregates and filler strongly. Also, recycled PET PC, used fly-ash as filler, is stronger resistance of sulfuric acid corrosion than $CaCO_3$, because it is composed of $SiO_2$ and very strong glassy crystal structure. Therefore, recycled PET PC, used fly-ash as filler, is available under corrosion circumstances like sewer pipe or waste disposal plant.

• Resources Recycling
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• v.15 no.1 s.69
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• pp.28-36
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• 2006

The development of material separation technique for waste plastic recycling are the necessary situation restricted by law the reclamation and incineration of waste plastic after 2004, with enforcement of EPR (Extended Producer Responsibility) system. As the this study is the research on the development of electrostatic separation techniques for recycling of life circles waste plastic by development of charging material and charger, the separation efficiency can be improved. Therefore, we developed the charger and electrostatic separator to increase charging efficiency and material separation per object plastics, rising these equipments, we removed PVC up to $99\%$ from two kinds of mixed plastics. And in case of restricting PVC content such as PET, we developed the separation technique that can remove PVC up to $99.99\%$ from PET with PET recovery about $80\%$. Also, as we separated over $98\%$ for three kinds of mixed plastics, and then established material separation technique to increase recycling of plastic.

• Proceedings of the Korean Institute of Resources Recycling Conference
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• 2005.10a
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• pp.23-33
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• 2005

The development of material separation technique for waste plastic recycling are the necessary situation according to restrict by law the reclamation and incineration of waste plastic after 2004 year, pith enforcement of EPR (Extended Producer Responsibility) system. As the this study is the research on the development of electrostatic separation techniques for recycling of life circles waste plastic, it can improve separation efficiency according to development of charging material and charger. Therefore, we developed the charger and electrostatic separator to increase charging efficiency and material separation per object plastics, using these equipments, we removed PVC up to 99% from two kinds of mixed plastics. And in case of restricting PVC content such as PET, we developed the separation technique that can remove PVC up to 99.99% from PET with PET recovery about 80%. Also, as we separated over 98% for three kinds of mixed plastics, and then established material separation technique to increase recycling of plastic.

• The monthly packaging world
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• s.246
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• pp.95-99
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• 2013

• The monthly packaging world
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• s.102
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• pp.219-228
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• 2001

• The monthly packaging world
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• s.269
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• pp.52-57
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• 2015

• Resources Recycling
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• v.8 no.2
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• pp.12-16
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• 1999

• The monthly packaging world
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• s.329
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• pp.94-95
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• 2020

환경부는 지난 8월 18일 코로나19 영향으로 회수·재활용의무 이행 실태가 급격히 악화된 종이팩, PET 단일무색 등의 품목에 대한 재활용의무율을 조정하기 위해 '2020년도 제품·포장재별 재활용의무율(환경부고시, 제2019-266호, 2020. 1. 1)'을 일부개정하는 행정예고를 발표했다. 다음에 상세한 내용을 살펴보도록 한다.

• Resources Recycling
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• v.23 no.5
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• pp.68-79
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• 2014

Since 1990s, efforts to recycle the waste plastics by chemical methods have increased. And in accordance with this trend, attempts have become active to use the waste PET as raw materials of chemical industries. In this article, the patents and papers for development of commercial technology for feedstock recycling and high end products from PET wastes were collected and analyzed. The open patents of USA (US), European Union (EP), Japan (JP), and Korea (KR) and SCI journals from 1974 to 2013 were investigated. The patents and papers were collected using key-words and filtered by the definition of the technology. The patents and papers were analyzed by the years, countries, companies, and technologies and the technical trends were discussed in this paper.

• Proceedings of the Korea Multimedia Society Conference
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• 2003.05b
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• pp.347-350
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• 2003

최근 '생산자 책임 재활용제도'가 시행되면서 의무재활용 캔, PET 용기류 생산자들은 판매되 제품에 대한 수집·선별·재활용의 편의를 위해 재활용기계 등의 연구·제작이 필요하게 되었다. 본 논문에서는 부탄가스캔과 비슷한 모양의 일반 음료캔을 부탄가스캔으로 오인식하는 현재의 재활용 기계의 문제점을 분석하고, 비선시스템을 이용하여 부탄가스캔만이 가진 특징형상을 추출하여 선별방식의 문제점을 보완할 수 있는 방법을 제안한다.