Tyres are highly engineered composite systems. A single tyre contains multiple rubber compounds, each located in a specific zone and each performing a distinct mechanical, thermal, and fatigue-related function. Carbon black selection therefore cannot be generic — it must be zone-specific and application-specific.
At iSTAR, we design three complementary carbon black platforms for tyre applications
PROPELON®
engineered for dynamic performance and heat control
VULCROX®
engineered for structural durability and load endurance
Together, these platforms replace conventional ASTM grades with engineered, zoneoptimized solutions.
Functional Rubber Zones and Their Material Demands
Before discussing tyre segments, it is essential to understand where carbon black is used inside a tyre and why each zone demands different properties.
