Posts

Why is PP difficult to extrude ?

PP is a difficult material to extrude because it tends to shrink ovally.

Why is HDPE difficult to extrude ?

HDPE is a difficult material to extrude because it tends to shrink ovally.

Oval or flat filament

A very common problem during filament extrusion is that the filament produced with your filament maker is oval or flat shaped. Filament ovalness (or flatness) can cause 3D-printing problems. This deformation of the filament can have two different causes, which will both be discussed here, as well as potential fixes.