| 摘要 |
<p>The medium has a melt blown layer made of thermoplastic polymer that is selected from a group of thermoplastic elastomers, polybuthylene terephtalate, PET, polypropylene or polyamide. A filter layer is made of a thermoplastic staple fiber non-woven fabric, where the melt blown layer is interconnected with the filter layer at defined punching areas by pressure and heat. The defined punching areas form a portion of minimum 4 percent and maximally 30 percent of the total area of the medium.</p> |
