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notes/3D printing/Filament.md

@@ -214,4 +214,19 @@ TPE enhanced with the same chemicals used to make ABS.
 - Horrible to print in every way
 - Useful for purging the nozzle when switching between high and low temp filaments
 
-# POM (Polyoxylmetn)
+# POM (Polyoxylmethylene)
+POM is most commonly used when CNCing plastic.
+- It's cheap and very easy to print, with a low coefficient of friction.
+- Zero bed adhesion
+- Very poor layer adhesion
+- When it overheats, it turns into formaldehyde
+
+# PVDF (Polyvinylidene Flouride)
+- A chemical cousin of teflon
+- As easy to print as PET-G
+- Extremely tough
+- High heat/friction resistance
+- Hydrophobic
+- Most important because of its chemical resistance.
+- Fairly expensive
+- When mildly overheated, turns into horribly toxic chemicals (carbon monoxide, )