PLA/LDPE Blend Monofilament for 3D Printing
Vol. 55, No. 3, pp. 158-163,
Jun. 2018
10.12772/TSE.2018.55.158
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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.%.
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