Halogen Free Flame Retardant ( HFFR) Cable Compounds

The use of silanes in filled polypropylene HFFR compounds affords the same advantages as in other HFFR compounds:

• Increased loading levels
• Effective flame retardation
• Significantly reduced water uptake into the polymer
• Much improved electrical properties
• Improved processability of the highly filled polymers
• Increased throughput during cable production
• Improved mechanical properties

Special Multifunctional Silane Systems™ such as Dynasylan^® SILFIN 70 and SILFIN 71 achieve a simultaneous crosslinking of the polyethylene and coupling between the filler and the resin.

There’s Only One Thing, More Important than Safety: More Safety.

HFFR (Halogen Free Flame Retardant) cables help to prevent cable fires from occurring, and even if fire does break out, there is considerably less accompanying smoke. Therefore, they are especially important in protecting the lives of people and animals, thereby bringing even more security to a world flooded with technology. Nevertheless, no manufacturer today can afford to forsake functionality for security. For HFFR cables too, top priority is mechanical and electrical product properties and the best possible melt processability. This can only be achieved through the optimum adhesion of fillers and polymers and through good crosslinking of the polyethylenes. Dynasylan^® from Evonik helps cable manufacturers to guarantee that these requirements for HFFR cables are met. For this, Dynasylan^® can offer various vinylsilanes, vinyloligomers or aminosilanes. Dynasylan^® SIVO 210 is especially well suited to simplifying the production process in EVA polyethylene compounds and enabling the cost-effective production of HFFR cables.

How to Find the Suitable Dynasylan^® Grade

For safety reasons, the use of low flame and low smoke cables is becoming more and more important. These cables are usually based on polymers, such as polyethylene and EVA, and are filled with mineral fillers that release water upon exposure to elevated temperatures. The result is a cable that, in the case of a fire, produces significantly less smoke, chars instead of melts and thus dramatically reduces fire propagation. Common fillers are aluminum trihydroxide and magnesium dihydroxide. Which is the right silane to choose depends on the polymer matrix.