Bull Chemicals, a key supplier of brake pads friction materials additives, regards calcium sulfate whisker as a core component optimizing brake pad performance. This one-dimensional, needle-like reinforcing material solves critical performance challenges, relying on its superior properties to boost stability, durability and reliability. Brake pads and brake pads mixture are balanced composites of binders, friction modifiers and reinforcing agents—brake pads Calcium Sulfate Whisker stands out as the latter.
Table of Contents
First, excellent reinforcement and anti-cracking.
With an aspect ratio of 20-50 (length 50-200 μm, diameter 2-10 μm) and tensile strength ≥2000 MPa (surpassing steel/glass fibers), adding 5-8 wt% creates an interlocking network. It raises flexural strength by 45% and cuts cracks by 60% vs. non-whisker pads, preventing early damage.
Second, stable friction control.
The whisker’s smooth, uniform structure stabilizes friction coefficient (μ). Pads with 6 wt% whisker keep μ 0.35-0.40 over 15,000 cycles (100-450°C), while traditional mineral fibers cause ±0.06 fluctuations, ensuring consistent braking.
Third, strong wear resistance.
Bull Chemicals’ tests show whisker-reinforced pads have a wear rate of 0.05-0.09 mm/1000 cycles—35% lower than wollastonite pads. With Mohs hardness 3.5 and chemical inertness, it extends service life by 25%.
Fourth, noise and vibration reduction.
The whisker fills matrix voids by 45%, lowering braking noise by 10-15 dB (50-200 Hz) and minimizing vibration.
Bull Chemicals provides ≥98% pure whiskers, customizable in aspect ratio, length and surface treatment. Our proprietary modification boosts whisker-binder adhesion by 30%.
In short, calcium sulfate whisker is a core reinforcing component. Bull Chemicals’ solutions help make safer, more durable brake pads—partner with us to advance your technology.
