- 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.