| 摘要 |
An aqueous dispersion of long and short fibres is slurried by stripe-forming elements onto a moving endless wire. The long fibres have a minimum length of 12.7 mm. The short fibres are shorter than 12.7 mm. The stripe-forming elements extend in the direction of movement of the endless wire. They are either formed on the longitudinal wire itself by stripy liquid-impermeable coverings over the wire apertures or fixed in place as stripe-forming strips above the endless wire. The distance between the stripe-forming elements is less than the average length of the long fibres. The fibre web thus produced has successive alternating regions (11, 12) of higher and lower fibre density. The fibres in the regions (11) of higher fibre density are aligned in a parallel arrangement in the longitudinal direction of the fibre web. The fibres in the regions (12) of lower fibre density are aligned transversely to the longitudinal direction of the fibre web. The fibres in the stripe-structured fibre web are fixed, for example by applying an adhesive to the composite (10) or, if thermoplastifiable fibres are present, by heating the composite (10). <IMAGE> |
