Difference between FKM and AFLAS®
AFLAS® is at an advantage of better chemical resistance, especially against alkalis, such as amines, ammonia, caustic soda, etc.
AFLAS® is at the similar level compared to the low outgass grade of FKM.
Plasma resistance
Depending on operating conditions, AFLAS® can be applicable like perfluoroelastomers.
Food-contact application
AFLAS® 100 S polymer conforms to USP class VI. The standard formulation of each grade has passed the examination based on the ordinance No. 85 of Japanese Ministry of Health, Labor and Welfare.
AFLAS® is used for automotive oil seals because of excellent base resistance.
AFLAS® is also used for mechanical seals as O-rings and gaskets.
AFLAS® 150 series is used for heat-resistant insulation of wire and cable, because the volume resistivity is higher than 10~15ohm-cm.
Bonding to other elastomers
AFLAS® can be bonded to silicon rubber and acrylic rubber.
Primer for metal bonding
Primer should be selected according to AFLAS® grade.
Followings are examples.

[ AFLAS® 100/150 Series ]
(1) Metaloc S-10A, from Toyo Kagaku Kenkyujo.
(2) Monicas MP-204, from Yokohama Kobunshi Kenkyujo.
(3) Monicas MP-205, from Yokohama Kobunshi Kenkyujo.

[ AFLAS® 200 Series ]
(1) Chemloc Y-4310, from Load.
(2) Chemloc 607, from Load.
(3) Monicas VT-200, from Yokohama Kobunshi Kenkyujo.
Is there a recommended formulation for AFLAS®?
A suitable peroxide chemical is required. We recommend 1,3-bis (t-butylperoxy)-diisopropylbenzene.
Can AFLAS® be used to make color compounds?
While it can be used for color compounds in the same way as general rubber, the color of the base polymer may affect certain bright color compounds during post-curing.
Heat resistant inorganic pigments are recommended because AFLAS® needs post cure at higher than 200 deg.C.
Processing aid
Sodium stearate is recommended for AFLAS® 100, 150 and 200 Series. ACPE is recommended for AFLAS® to improve its flow.
Molding method
AFLAS® is compounded with ingredients by using a kneader, 2-roll mill etc., and molded by compression, extrusion and other molding methods similar to other elastomers.
Sodium stearate should be dispersed well into compound, otherwise it may lead to foaming.
Shrinkage on compression molding
Depending on the formulation, the shrinkage is about the same as FKM and in the range from 2.5 to 3.0 %.
Mold release
External mold release agent Trasys 818 (from DuPont) is recommended for AFLAS® 100 and 150 Series.
Product form : compound / polymer
AFLAS® is available in both product forms of polymer and compound. Please contact us for the detailed information.