| 摘要 |
<p>Film with a determined permeability, said film comprising at least two strips (1A, 1B) attached together by means of a welding line or band (9) in which fibre(s) (8) extend, whereby at least one end or part(s) (13, 14) of fibre(s) are located outside the welding line (9) and whereby the fibre(s) (8) form channels (15) for the exchange of gases, but avoiding the passage of solid particles.</p> |
