Titanate is used as a friction modifier, for noise reduction, fade resistance, stability of friction co-efficient, and wear resistance. In our previous study, we focused on the chemical reaction on the friction surface. We reported that the reaction between titanate and phenolic resin affects the friction property. In this study, we focused on the effect of titanate on the brake wear emission. Our friction tester is a scale inertia dynamometer with a blower using clean air through a HEPA filter. We use the 1/7 area size of the full-size pad. In the case of testing by the same slide speed condition, absorbed energy per unit area is almost same. We can reproduce the phenomenon of the frictional surface of the real size in a small specimen. By analysis of the frictional surface, we can also clarify the mechanisms of titanate. In addition, by using both a CPC (Condensed Particle Counter) and a MCI (Multi-Nozzle Cascade Impactor) sampler, it has become possible to count the number of particles and measure the mass of the particles. In our test results, titanate reduced both particle number and particle mass (both PM2.5 and PM10). This study suggests that frictional behaviour and wear particle amounts differ depending on the presence or absence of titanate, and reports on the mechanisms of those differences. We assume that these mechanisms are related in our previous studies of the chemical reaction between phenolic resin and titanate.

Otsuka Chemical Co. Ltd: Mrs. Emiko Daimon