| 摘要 |
PURPOSE:To easily produce a polybenzazole nonwoven fabric excellent in heat resistance, flame resistance and abrasion resistance at a low cost. CONSTITUTION:This method for producing a nonwoven fabric is to melt a spinning dope comprising polybenzazole and polyphosphoric acid, extrude the dope into a noncoagulating gas, pull the extruded fiber by a stress separating device or an aspirator run by using a liquid stream, collect the fiber on a net conveyor as a nonwoven fabric, wash and dry the fabric and obtain the objective nonwoven fabric. |
