Compared to other technologies, Silane crosslinking technology allows higher extrusion speed.
As opposed to traditionnal crosslinking processes involving organic peroxide (eventually combined with a co-monomer), no crosslinking accurs inside the extruder even at high temperature. See crosslinking mechanism
For applications requiring high extrusion speed, Silane crosslinking technology is the perfect candidate
During a traditionnal peroxide crosslinking process, peroxide decomposition needs to be carried out after extrusion in order to avoid Scorch effect. Consequently, extrusion temperature needs to remain below the decomposition temperature of the peroxide. For this reason, this technology does not allow high extrusion temperatures. With a silane curing system, extrusion speed in mainly limited by the maximum die pressure and extrusion instability such as shark skin. (see figure 1)
