Mechanical rubber goods run in hard conditions: load, heat, vibration, chemicals, pressure, repetitive strain.
They fail when reinforcement, hysteresis, dispersion or conductivity are not engineered correctly.
Anti-Vibration & Engine Mounts
Used in
Engine mounts
Subframe mounts
Bushings and vibration isolators
Chassis and suspension rubber components
Conventional Carbon Blacks & Application
Industry typically uses reinforcing furnace blacks in the N220/N330 family here because they:
deliver high tensile and tear strength
build modulus for stiffness and support
give decent durability in NR/SBR and blends
Industry Problems with Conventional Grades
High hysteresis / heat build-up at dynamic strain → mounts run hot and fatigue earlier.
Crack initiation at poorly dispersed agglomerates.
Over-stiffening when more black is added for strength.
Batch-to-batch inconsistency in modulus and dynamic properties.
ISTAR Solution – SPIREXA® Reinforcing Furnace Black
SPIREXA® is ISTAR’s reinforcing furnace black series, designed as a drop-in but upgraded alternative to N220/N330-type usage:
Morphology-engineered aggregates for strong reinforcement with lower hysteresis, so mounts run cooler.
Optimised structure density to build modulus without over-stiffening the compound.
Controlled porosity & surface activity for improved filler–polymer interaction and fatigue life.
High cleanliness and dispersion behavior to reduce crack initiation sites.
Result: Mounts and bushings with N330-level strength, but cooler running, longer fatigue life and more stable dynamic modulus.
Product Name
Product Description
Datasheet
SDS
SPIREXA®
A reinforcing furnace carbon black series engineered for high-strength applications with controlled dynamic behavior. It delivers strong reinforcement with reduced hysteresis and improved fatigue life compared to conventional high-reinforcing blacks.
TDS
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SDS
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