diff --git a/notes/3D printing/Filament.md b/notes/3D printing/Filament.md
index 39ebf37..3eaddc6 100644
--- a/notes/3D printing/Filament.md	
+++ b/notes/3D printing/Filament.md	
@@ -248,4 +248,13 @@ Same building blocks as PEEK, in different levels
 - Worse than PEEK mechanically, still far beyond other filaments
 - Much easier to print compared to PEEK
 
-# PPS (Polyphenylene Sulphide)
\ No newline at end of file
+# PPS (Polyphenylene Sulphide)
+- Most chemically resilient filament
+- $200/kilo
+
+# PSU (Polysulphone)
+- Weakest superpolymer 
+- Mechanical properties similar to PA6 nylon
+- Very high glass transition temperature (187C)
+
+