Abstract
In this study, micro-glass balloon reinforced composites which improve by interface reinforcement. The matrix resin of composites is epoxy resin and their filler is the micro glassy hollow particle materials of "Sirasu Balloon". Bending tests was performed by using coupon type specimens of composites. The mechanical properties of the composites were examined from the experimental results. By using scanning electron microscope, the observations for the interfaced bond of particle dispersion and for fracture surfaces were performed from the viewpoint of micro-mechanical study.