Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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PLA/LDPE Blend Monofilament for 3D Printing

3D 프린터 용 PLA/LDPE 고분자 블렌드 모노필라멘트

  • 김유진 (영남대학교 대학원 유기신소재공학과) ;
  • 최혜미 (영남대학교 대학원 유기신소재공학과) ;
  • 신동수 (클래비스) ;
  • 김규식 (클래비스) ;
  • 장순호 (한국섬유개발연구원) ;
  • 오태환 (영남대학교 대학원 유기신소재공학과)
  • Received : 20180431
  • Accepted : 2018.05.21
  • Published : 2018.06.30
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Abstract

In this study, the effects of a compatibilizer and the blend ratio of low-density polyethylene (LDPE) on the 3D printability of polylactic acid (PLA)/LDPE monofilaments were investigated. Two kinds of PLA and LDPE with different melt indices (MI) were selected for the PLA/LDPE blend monofilaments. An ethylene/butyl acrylate/glycidyl methacrylate terpolymer, having affinities for both PLA and LDPE, was used as a compatibilizer. The tensile strength of the PLA/LDPE monofilaments decreased with increasing amounts of LDPE. PLA with a lower MI of 6 showed better printability than PLA with higher MIs of 15-30, due to its higher viscosity. When the compatibilizer was added, the compatibility and 3D printability increased. The printability increased when the compatibilizer was added up to 20 wt.%, but decreased when LDPE was added at over 30 wt.%.

Keywords

References

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