| 摘要 |
PCT No. PCT/CH97/00463 Sec. 371 Date Apr. 7, 1999 Sec. 102(e) Date Apr. 7, 1999 PCT Filed Dec. 11, 1997 PCT Pub. No. WO98/28473 PCT Pub. Date Jul. 2, 1998The method of producing an industrial yarn at a production speed of from 3000 to 6000 m/min includes melt-spinning a plurality of polyester filaments; stretching a thread made from the filaments by means of a delivery assembly (1) and a drawing roller system (2); providing at least one thread-braking device (3) including at least one deflecting roller (31, 32) between the delivery assembly (1) and the drawing roller system (2); deflecting and decelerating the thread between the delivery assembly and the drawing roller system by means of the at least one thread-braking device (3) and looping the thread only once around the at least one deflecting roller (31,32) of the at least one thread-braking device (3). The at least one deflecting roller (31, 32) is braked to a circumferential speed (v3) given by the following formula v3=v1+(v2-v1)* F, wherein 0.5</=F<1, v1=the delivery assembly speed and v2=the drawing roller system speed. |
