| 摘要 |
The invention relates to an extrusion device (1) for extruding a tubular film in a transport direction (z). Said extrusion device (1) comprises a die head with an annular gap, from which the melted material is discharged, said material solidifying at the frost line during transport, thus forming the tubular film. The device also comprises a distribution unit for distributing the melted material to the annular gap, a take-off unit, which is used to transport the tubular film and at least one guide element, which is located between the die head and the take-off unit and which guides components of the tubular film along a path. The novel aspect of the invention is that at least one guide element contains at least one porous, preferably microporous material and that the guide element(s) in the transport direction (z) of the tubular film is or are situated between the distribution device and the frost line. |
