| 摘要 |
The continuous multilayer fabric (100) is formed by the simultaneous unwinding of a hydrophilic cotton gauze (10) and a nonwoven (20) from their rolls (1,2). At least one automatic tension control (3) acts on the unwinding actions. The materials (10,20) pass together through a powered takeoff station (4) before reaching the workstations (5,8,17,18) where they are bonded together into the separate disposable fabric sections. Continuous nonwoven ribbons or bias bindings (6) are unwound (9) and placed along the longitudinal edges of the multilayer fabric, and are folded over the edges to be welded (17) in place by ultrasonic welding seams. At a cutting station (18), the fabric is cut laterally into separate lengths (200), and any dust is extracted by suction. The cut fabric is taken off by a drive (16), on a line at right angles to the cutting line, and the cut edges are sealed by folded ribbons or bias bindings with ultrasonic welding together with a thread in at least one of the four edges which gives radio detection. Before the material is cut into lengths (200), and preferably before the edge bindings are laid, a number of longitudinal ultrasonic welds are formed along the material at intervals across the fabric width. The tension of the cotton gauze material is set by the powered takeoff and a bobbin roll (1) brake. The tension of the nonwoven material is set after it has been unwound from its roll (2) by an automatic tension control, between the wound roll and the takeoff with a friction grip on the nonwoven by the flanking cotton gauze layers. An automatic tension control is applied to the multilayer material between the ribbon laying station (8) and/or the welding station and the cutting station. |
