| 摘要 |
<p>The invention relates to a hygiene filter (1) for a respiratory mask (2) comprising an oronasal face piece (3) adapted to be: connected to a respiratory gas source by means of a delivery channel (5), and held on the user's face. The hygiene filter (1) is supported by the oronasal face piece (3) and arranged between the user's face and the delivery channel (5). According to the invention, the filter (1) comprises at least one felt-type tribocharged nonwoven fabric layer made from at least two different types of fibres that can supply opposing electrical charges to the fabric, reinforcing the filtration. The filter has a surface area of between 12 and 28 cm2.</p> |
