ISTAR Solution – SPIREXA® + DURONIX® Belt Architecture
SPIREXA® reinforces high-stress belt sections (tension zones) with optimized
dynamic properties.
DURONIX® semi-reinforcing grades adjust modulus and flow in compression or
neutral zones.
By combining SPIREXA® and DURONIX®, iSTAR allows belt makers to:
Controlled porosity & surface activity for improved filler–polymer interaction and fatigue life.
High cleanliness and dispersion behavior to reduce crack initiation sites.
Morphology-engineered aggregates for strong reinforcement with lower hysteresis, so mounts run cooler.
Optimised structure density to build modulus without over-stiffening the compound.