| 摘要 |
<p>To produce a bonded nonwoven material (V), of thermoplastic filaments and/or fibers with a thermoplastic film cladding on one side, after leaving the thermal bonding roller (3) the material is drawn biaxially in the longitudinal and lateral directions before cooling to room temp. Before reaching the thermal bonding roller (3), the material is heated to a temp. below its melting point. The plastics film cladding has a temp. of 180-240 degrees C on leaving the bonding roller. The bonded material is drawn biaxially by 100-400%, while at a temp. of 80-150 degrees C. The biaxially drawn nonwoven is fixed thermally, using hot air at a temp. of 180-200 degrees C. An Independent claim is included for an assembly (2) fitted with a thermal bonding roller (3) with a wide slit jet (4) and at least one electron spray electrode (5) to give the fabric an electrostatic charge. A drawing unit (6,9,10) follows the assembly, to give a biaxial drawing action to the nonwoven (V).</p> |
