NON-PFAS FKM Precompound – EU Regulation Compliant
Fluoroelastomer FKM PFAS-FREE compound designed for O-ring applications, providing excellent resistance to chemical degradation and thermal aging for extended service life.
Product Overview
FD-401NFS is a fluoroelastomer precompound containing copolymer of hexafluoropropylene and vinylidene fluoride with curatives. Specifically designed for O-rings, seals, gaskets, and other complex shapes.
Basic Characteristics
| Property |
Value |
| Fluorine Content |
66% |
| Specific Gravity |
1.81 |
| Physical Form |
Slab |
| Color |
Off-white |
| Solubility |
Ketones and Esters |
| Mooney Viscosity ML 1+10@ 121ºC |
39 |
Key Features
- Excellent mold release
- Low compression set
- Increased cure rate
- Less mold fouling
- Increased mold flow
Processing Procedures
FD-401NFS can be compounded with internal mixers or two-roll mills using standard fillers and ingredients typical for fluoroelastomer formulations. All dry ingredients should be blended before adding to the rubbery solid. Full cooling should be maintained during compounding, and the compound should be cooled as quickly as possible after mixing.
Packing Information
FD-401NFS is packed with PE film in cartons. Net weight: 20kg per carton.
Safety and Handling
- Store in well-ventilated place
- Smoking strictly forbidden in working areas
- Avoid eye contact
- Wash thoroughly any contacted skin and clothing after handling
- Refer to product's Material Safety Data Sheet or consult Dowhon personnel for complete safety guidelines
Typical Properties
Compound Formulation
| Component |
Parts |
| FD-401NFS |
100 |
| MT Black (N990) |
30 |
| MgO |
3 |
| Ca(OH)2 |
6 |
| Carnauba Wax |
1 |
Rheological Properties
ALPHA PREMIER MDR, 100 cpm 0.5 Arc 177℃@ 6min
| Property |
Value |
Test Method |
| ML, lb.in |
1.42 |
ASTM D6601 |
| MH, lb.in |
20.54 |
ASTM D6601 |
| Ts2, min |
1:16 |
ASTM D6601 |
| T10, min |
1:16 |
ASTM D6601 |
| T90, min |
2:29 |
ASTM D6601 |
Physical Properties
Press Cure 180℃@5min, Post Cure 230℃@24hour
| Property |
Value |
Test Method |
| Tensile Strength, MPa |
16.6 |
ASTM D412 |
| Elongation at Break, % |
191 |
ASTM D412 |
| Hardness, Shore A |
74 |
ASTM D2240 |
| Compression Set % 200℃@70h |
16 |
ASTM D395, method B |
| Low Temperature Resistance Tr10, ℃ |
-17 |
ASTM 1329 |
