Fluorosilicone rubber, which is often abbreviated to FVMQ or MFQ, differs from Silicone (VMQ) rubber in that some of the methyl groups are replaced by fluoroalkyl groups, consequently Fluorosilicone usually contains 23 to 28 percent fluorine.
FVMQ has almost the same mechanical and physical properties as conventional Silicone rubber and its low-temperature flexibility is just as good. In addition, because of its fluorine content it has better resistance to many liquids such as oils and fuels, essentially combining the inherently good resistance to swelling of Fluorocarbon Rubber (FPM) with the low temperature flexibility of VMQ. However, the operating temperature range is slightly reduced: -50 to +250°C for Fluorosilicone rubber when compared with -100 to +280°C on standard VMQ’s, or up to 300°C for special grades of VMQ.
The two materials also differ significantly in electrical insulating capability, which is very good in the case of silicone rubber but can only be brought up to a similar level in Fluorosilicone by means of modifying the formulation.
Characteristics of Fluorosilicone Rubber
Useful characteristics of Fluorosilicone:
Not so useful characteristics of Fluorosilicone:
Common Uses of Fluorosilicone Rubber
Whilst Fluorosilicone materials have been used in the automotive and aerospace industries for some time, they are gaining an increasing acceptance in the medical and pharmaceutical sectors where FVMQ’s inherent resistance to bacterial growth, suitability for contact with the body and ease of sterilization make it ideal for many applications including:
· For more information on our high performance Fluorosilicone Rubber and Sponge, Fluorocarbon Rubber, and Silicone Rubber and Sponge materials and their applications please contact your account manager or phone our sales team.