| 摘要 |
A meltblowing die for forming nonwoven webs comprises a die body, a die tip mounted thereon and having a triangular nosepiece terminating in an apex, a row of polymer orifices formed in the apex and a polymer flow passage extending through the die body, the die tip and the nosepiece for conducting a polymer melt to the orifices, air plates mounted in flanking relationship to the nosepiece and defining converging air slits therewith, and a filament drawing device positioned below the row of orifices, and comprising a pair of air conduits extending parallel to the row of orifices and being spaced apart to form a drawing zone, each air conduit having a flow slit directed to discharge air downwardly into contact with filaments passing through the drawing zone, the angle of contact being from 1 DEG to 80 DEG with respect to the vertical plane. |
