METHOD AND DEVICE FOR FORMING A LONGITUDINAL FIBRE WEB

摘要

The invention describes a method and a device (101) for producing a longitudinal fibre web (100), in which fibres (2) are continuously applied, in the longitudinal direction, to a substrate web (6). In a pretreatment section, a relatively high tensile force (F) has to be exerted on the fibres, resulting in a relatively great strain ( epsilon ). Before the fibres (2) are applied to the substrate web (6), the stress in the fibres is reduced. The drive for the fibres in the pretreatment section is separate from the drive for the substrate web, the transport velocity of the fibres in the pretreatment section being controlled separately as a function of the transport velocity of the substrate web, in such a manner that the transport velocity of the fibres in the relaxed state is substantially equal to the transport velocity of the substrate web in the relaxed state. The result is a longitudinal fibre web (100) which is substantially free of length differences and stress differences between the fibres (2) and the substrate web (6).