Non-Asbestos Fibre materials are so-called because they fill the gap in the range of gasket materials previously occupied by asbestos. Asbestos, although considered to be a dangerous material, had excellent heat resistance properties, which is why it was utilised so widely in high temperature applications. When asbestos was outlawed, replacement materials were needed; so these asbestos-free, or non-asbestos, materials were developed to perform the same function, but without the corresponding problems.
These materials are now commonly comprised of aramid fibre (Kevlar), carbon and other non-organic fibres, which are in turn blended with different polymers to meet different applications: most commonly nitrile rubber, for fuel and oil resistance. These materials can also be graphite coated for non-stick and steam resistance, mixed with PTFE for excellent chemical resistance or with EPDM for potable water applications.
If you are unsure as to which material is best for your application then you can contact us.
