| 摘要 |
1,206,180. Fibrous fabrics; yarns. MONSANTO CHEMICALS Ltd. 4 Dec., 1968 [21 Dec., 1967], No. 58060/67. Headings DIF; D1R and D1W. A process for producing a textured fibre assembly comprises drawing an extruded foamed thermoplastic material and subjecting the drawn material to forcers e.g. rubbing, rolling, beating, twisting or shaking, to break down the foam walls and produce a threedimensional structure of fibre elements as described in Specification No. 1,114,151, the structure thus obtained is then treated so that a proportion of fibre elements adopt an inclined attitude, i.e. inclined to the direction of drawing when the assembly has been tensioned and allowed to relax on a horizontal surface. The treatment may comprise crimping, shrinking or swelling, the fibre elements preferably being composed of thermoplastic polymers which react differently to the treatment. The fibre assembly may be in the form of a non-woven fabric or preferably in the form of a yarn. In the case of the treatment being a crimping treatment, this may be effected by compression, false-twist, knit-de-knit, techniques or by means of knurled wheels. |
