PLA/LDPE Blend Monofilament for 3D Printing

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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PLA/LDPE Blend Monofilament for 3D Printing

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