Glass fibre is the most widely used filler. It improves the creep resistance of PTFE both at low and high temperature. It is chemically stable (except to strong alkalis and hydrofluoric acid-HF). It has little effect on the electrical properties of PTFE and improves its wear and friction behaviour. An often cited problem with glass-filled PTFE is discoloration of the finished parts, in particular on the inside of large billets.
Sheet, Rod, Moulded Cylinder
Milled fibres, nominal diameter 13 um
Nominal length 0.8 mm
Aspect ratio: min. 10