Abstract
Introduction: In China, respirator is widely used to protect the public from air pollution. The design of respirator is based on anthropometric date obtained from groups of people in RFTPs (respirator fit test panels). Meanwhile the respirator-user fit is not satisfied as unsatisfactory seal exist. Methods: To solve the respirator-user fit problem in China, this study was divided into four parts: The public head-face measurement and analysis of head data clustering; reverse establishment of head model can be based on the clustering results; using the model, forward design of mask structure can be conducted. Results: Combined with Rotation component matrix counting and the relative index, 3 out of 7 representative facial indexes can be used as clustering variables. They are nose length, bitragion breadth and face height. The optimal number of clusters was 5 determined by Mix-F statistics. According to the methods of mathematical statistics, it shows that the main kind is short and narrow which is the fifth in this article. By using the plaster replica method based on the 3D print of the facial model, the chart pattern of optimized small-face mask was achieved.
Highlights
In China, respirator is widely used to protect the public from air pollution
The results of facial width dimensions measured in this study were generally wider than RFTPs and LANL
A mean face model was done by selection from the 5th group which is the main part in the samples and this study provided an optimized chart pattern of small-face mask
Summary
In the context of environmental complexity, the use of masks is increasing, and the research on the dust filtration performance of scholars has increased, which tends to be saturated. There are gaps in the solution for the fit of face and mask. In Adri Spies’s study, only 13.8% of the volunteers demonstrated a successful fit with the medium sized mask through the Quantitative respirator fit test. He pointed out that the large percentage of failed fit tests indicates that reliance on off-the-shelf respirators could be problematic [1]. Zhang Xueyan et al used off-the-shelf masks to find
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