| 摘要 |
<p>The melt-blown fleece (3) is connected to the carded fleece (2) mainly in its non-compressed regions (7) using multi-microfilament strands (6). The filter material contains micropockets (4). The carded fleece staple fiber fineness is 0.9 - 12.0 dtex and its weight is 20-100 g/m2>. Its thickness is 0.2-1.5 mm. A hot-pressing roller forms the compressed regions (8) and uncompressed regions (7). A structured drum causes thermofusion to this end. A structured drum introduces the regions hydrodynamically. Air-permeability of the carded fleece is 1500-6000 l/m2> x sec. The fibers include an antimicrobial additive. The melt-blown fleece thickness is 0.4-2.5 mm and its weight is 50-120 g/m2>. Its air permeability is 300-1200 l/m2> x sec. An antimicrobial additive is included. The material of both fleeces comprises the same polymer.</p> |
