Crosslinking of Cables at Ambient Conditions

The crosslinking speed of silane modified polyethylene is affected by:

• Silane grade
• Number of water molecules present
• Temperature
• Pressure
• Grafting efficiency
• Amount of catalyst
• Dimensions of part to crosslink

For crosslinking at ambient conditions, the challenge is that the amount of water available is limited and the temperature is significantly reduced to standard crosslinking methods. Nevertheless, crosslinking must take place. Thus, the challenge is to find a system which increases the crosslinking speed at low temperatures and low humidity, but without pre-scorch during the extrusion step.

Compared to standard systems, Dynasylan® SILFIN 63 signifi cantly increases the crosslinking speed of PEX cable insulations at ambient conditions.

Dynasylan® SILFIN 63 achieves minimal requirement for hot set test significantly faster