화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.14, No.5, 622-628, August, 2003
Export Citation
폐폴리우레탄 폼의 재활용에 대한 연구(I)
A Study on the Recycling of Waste Polyurethane Foams
이현구†, 김형순
  • 서남대학교 화학공학과, 전북 590-701
Hyun-Koo Lee†, and Hyung-Soon Kim
  • Department of Chemical Engineering, Seonam University, Jeonbuk 590-701, Korea
E-mail:
초록
폐 우레탄 폼을 재이용한 PUF (new/recycled)의 제조에서 폐폼의 크기, 형태 및 함량에 따른 영향을 고찰하였다. 경질 샌드위치 패널의 생산 공정에서 발생한 스크랩을 powder와 cube, bar형태로 가공하여 신재폼과 동일한 처방으로 몰딩하였다. 제조된 PUF (new/recycled)의 기계적, 물리적 특성들은 굽힘강도, 연소성, 흡수성에 대한 시험과 측정을 통해 고찰했으며, 경계면(new/recycled)에서 형성된 cell의 미세 구조는 주사 전자 현미경(SEM)을 이용하여 관찰하였다. Powder형 폐폼으로 제조된 PUF (new/recycled)는 슬러리(폐폼/원료용액)의 점성에 의한 원료용액의 반응성 저하와 폐폼에 의해 유입된 air의 영향으로 미충진과 특성 저하가 발생하였다. 한편 cube와 bar형의 경우는 폐폼간의 간섭과 폐폼에 대한 원료용액의 접촉면적 증가로 미충진 현상이 발생하였고, 경계면(new/recycled)에서 성장한 cell의 낮은 밀집도, 불균일한 형태 및 크기, 그리고 원료용액의 접착력 저하로 인하여 특성저하가 발생하였다. 폼(new)의 충진성과 PUF (new/recycled)의 특성을 고려할 때 폐폼의 최대 재활용 함량은 powder의 경우 20 wt% 미만이었으며, cube와 bar형은 40 wt% 이상이었다.
The effects of shape, size, and contents of waste polyurethane foam on recycled foam was studied. The waste foam was treated in shape of powder, cube and bar type generated from rigid sandwich panel process. The tests for flexural strength, combustibility, and water absorptivity were carried out to investigate the mechanical and physical properties of the recycled foams. And the cell microstructure was evaluated through Scanning Electron Micrograph (SEM). The recycled foam containing powder-shaped underfilled and showed poor properties that was generated through reactivity of the resins and increasing of slurry viscosity. For the recycled foam with the cube and bar-shaped, the underfilling was caused by interference between the waste PUFs and increasing surface areas of PUF. Low cell density, non-uniformity of cell shape and size, and low adhesion of the boundary surface (new/recycled) was showed as a result of the poor properties. Considering underfilling and the properties of PUF (new/recycled), maximum recycle contents were less than 20 wt% for the powder and above 40 wt% for the cube and bar.
Keywords:waste foam;polyurethane;recycling;remolding
  1. 한국자원재생공사, 폐폴리우레탄 발생실태 및 최적 처리기술에 관한 연구 (1997)
  2. Park CR, Kim SI, Kim YC, Park NC, Seo G, J. Korean Ind. Eng. Chem., 8(6), 920 (1997)
  3. Stone H, Villwock R, Martel B, Recent Technical Advances in Recycling of Scrap Polyurethane Foam as Finely Ground Powder in Flexible Foam, Proc. of the Polyurethanes Conf. (2000)
  4. Clean Washington Center, Recycling Advanced Composites (2000)
  5. Wu CH, Chang CY, Li JK, Polym. Degrad. Stabil., 75, 413 (2001)
  6. Modesti M, Simioni F, Munari R, Baldoin N, React. Funct. Polym., 26(1), 157 (1995) 
  7. Becker D, Roeder J, Oliveira RVB, Soldi V, Pires ATN, Polym. Testing, 22, 225 (2002) 
  8. Murakami O, Technology for Recycling Plastic Materials, Mitsubishi Electric (2001)
  9. Farrissey WJ, Plastic Recycling, ed. R.J. Ehrig, 233, Hanser Publishers, New York (1992)
  10. Hensen F, REcycling and Recovery of Plastics, ed. J. Brandrup, 291, Hanser Publisher, New York (1996)
  11. Eling B, Phanopolous C, Polyurethane Adhesives and Binders, Reactive Adhesives and Sealants Seminar, Loughborough in UK, November (2000)
  12. BASF Company, Polyurethane Handbook (2001)
  13. Weiss A, Dingenouts N, Ballauff M, Senff H, Richtering W, Langmuir, 14(18), 5083 (1998) 
  14. 금호미쓰이화학, 폴리우레탄 TS handbook (2001)
  15. Lay DG, Cranley P, Polyurethane Adhesives, Chapter 24, In: Handbook of Adhesive Technology, A. Pizzi and K.L. Mittal, 405, Marcel Dekker, New York (1994)
  16. Vick CB, Okkonen EA, Forest Products J., 48, 71 (1998)