| 摘要 |
The method comprises melt-spinning filaments by a spinning device and subsequently cooling, stretching and/or removing from a deposition area for fleece web (11), which is pre-strengthened through mechanical stretching. A hydrophilic fluid medium is subjected in the fleece web after deposition of the filament and before the mechanical stretching of the fleece web, which is end-strengthened subsequently through hydrodynamic and/or hydraulic solidification. The end-strengthened fleece web comprises a specific weight per area of greater than 100 g/m 2>. The method comprises melt-spinning filaments by a spinning device and subsequently cooling, stretching and/or removing from a deposition area for fleece web (11), which is pre-strengthened through mechanical stretching. A hydrophilic fluid medium is subjected in the fleece web after deposition of the filament and before the mechanical stretching of the fleece web, which is end-strengthened subsequently through hydrodynamic and/or hydraulic solidification. The end-strengthened fleece web comprises a specific weight per area of greater than 100 g/m 2>. The fluid medium is subjected in a quantity of 0.4-15% on the weight of the dried fleece web and/or the weight of the dried surface section of the fleece web in the fleece web. The mechanical stretching of the fleece web is carried out with a stretching density of below 70 E/cm 2>. The fleece web is pre-moistened after deposition of the filament and before the mechanical stretching of the fleece web. The water jet treatment is carried out during the hydraulic strengthening and/or final strengthening with a high-pressure water-jet beam (20, 21) over the top of the fleece web and with high-pressure water-jet beam below the bottom side of the fleece web. The high-pressure water-jet beams are processed during the hydraulic strengthening and/or final strengthening. The high-pressure water-jet beam with highest hydraulic strengthening has a portion of 40% of the total hydraulic strengthening. The total hydraulic strengthening is below 0.8 kWh/kg. The hydraulic strengthening is carried out with a high pressure water jet beam that has a hole thickness of smaller than 30 hpi. The hydraulic strengthening and/or final strengthening by a water jet device (17) is processed with high pressure water jet beam that has a hole thickness of 0.10-0.16 mm. The water jet device is operated with a water pressure of 220 bar and the high pressure water jet beam is processed with a water pressure of 130-220 bar. The final strengthened fleece web has a specific weight per area of greater than 150 g/m 2>. An independent claim is included for a device for producing spunbonded fabrics made of filaments of thermoplastic plastic. |
