The New Silicone N99 Half-Piece Respirator

As required by Occupational Safety and Health Administration OSHA)\[7\], the halfpiece respirators need to pass the fittestto identify those individuals who do not achieve the good fit necessary for adequate protection. The performance of this respirator was also determined by measuring percent leakage under constant airflow\[8\]. The purposes of this study was to evaluate the fitting characteristicof our newly invented silicone N99 respirator and the performance against 30 µm particles using NaCL aerosols. The study was conducted to achieve two specific research objectives 1. To investigate the fit characteristic of the novel silicone mask and whether the strap adjustment can help reduce the face-seal leakage 2. To determine the level of performance by measure the inward leakage of the generated aerosolswith the new filter and used filter for up to 24 hours.