Claims
- 1. A process for producing a polyester fiber, wherein a polyester comprising 90% or more by weight of a poly(trimethylene terephthalate) is melt spun, the process comprising rapidly cooling molten filaments extruded from a spinning nozzle to be changed into solid filaments, winding the solidified filaments round a first roll heated at 30 to 80° C. and having a peripheral speed of 300 to 3,500 m/min without winding thereon, winding the filaments round a second roll heated at 100 to 160° C., whereby the filaments are drawn at a draw ratio of 1.3 to 4 between the first and the second roll having a peripheral speed higher than that of the first one, and winding the filaments on a winder having a peripheral speed lower than that of the second roll.
- 2. A process for producing a polyester fiber, wherein a polyester comprising 90% or more by weight of a poly(trimethylene terephthalate) is melt spun, the process comprising passing molten filaments extruded from a spinning nozzle through a retarded cooling zone 2 to 80 cm long provided directly below the spinning nozzle and held at atmospheric temperatures of 30 to 200° C., whereby rapid cooling of the filaments is suppressed, rapidly cooling the molten filaments to be changed into solidified filaments, winding the solidified filaments round a first roll heated at 30 to 80° C. and having a peripheral speed of 300 to 3,500 m/min without winding thereon, winding the filaments round a second roll heated a 100 to 160° C., whereby the filaments are drawn at a draw ratio of 1.3 to 4 between the first and the second roll having a peripheral speed higher than that of the first one, and winding the filaments on a winder having a peripheral speed lower than that of the second roll.
- 3. A process for producing a polyester fiber, wherein a polyester comprising 90% or more by weight of a poly(trimethylene terephthalate) is melt spun, the process comprising rapidly cooling molten filaments extruded from a spinning nozzle to be changed into solidified filaments, winding the solid filaments round a first roll heated at 30 to 80° C. and having a peripheral speed of 300 to 3,500 m/min without winding thereon, winding the filaments round a second roll heated at 100 to 160° C., whereby the filaments are drawn at a draw ratio of 1.3 to 4 between the first and the second roll having a peripheral speed higher than that of the first one, cooling the fiber with a third roll, and winding the fiber on a winder having a peripheral speed lower than that of the second roll.
- 4. A process for producing a polyester fiber, wherein a polyester comprising 90% or more by weight of a poly(trimethylene terephthalate) is melt spun, the process comprising rapidly cooling molten filaments extruded from a spinning nozzle to be changed into solidified filaments, imparting a finishing agent to the fiber, whereby the lubricant amount becomes from 0.2 to 3% by weight, winding the solid filaments round a first roll heated at 30 to 80° C. and having a peripheral speed of 300 to 3,500 in/mm without winding thereon, winding the filaments round a second roll heated at 100 to 160° C., whereby the filaments are drawn at a draw ratio of 1.3 to 4 between the first and the second roll having a peripheral speed higher than that of the first one, and winding the filaments on a winder having a peripheral speed lower than that of the second roll.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9-339502 |
Nov 1997 |
JP |
|
Parent Case Info
This is a division of application Ser. No. 09/555,118, filed May 25, 2000, now U.S. Pat. No. 6,284,370, which is a 371 of PCT/JP98/05328 filed Nov. 26, 1998 incorporated herein by reference.
US Referenced Citations (5)
Number |
Name |
Date |
Kind |
3584108 |
Nelson et al. |
Jun 1971 |
A |
3681188 |
Harris et al. |
Aug 1972 |
A |
3984600 |
Kawase et al. |
Oct 1976 |
A |
4454196 |
Iohara et al. |
Jun 1984 |
A |
4475330 |
Kimura et al. |
Oct 1984 |
A |
Foreign Referenced Citations (18)
Number |
Date |
Country |
0 547 553 |
Jun 1993 |
EP |
0 745 711 |
Dec 1996 |
EP |
0 949 363 |
Oct 1999 |
EP |
52-5320 |
Jan 1977 |
JP |
52-8123 |
Jan 1977 |
JP |
52-8124 |
Jan 1977 |
JP |
58-31114 |
Feb 1983 |
JP |
58-104216 |
Jun 1983 |
JP |
59-211620 |
Nov 1984 |
JP |
5-262862 |
Dec 1993 |
JP |
0 8173244 |
Jul 1996 |
JP |
9-3724 |
Jan 1997 |
JP |
11100768 |
Apr 1999 |
JP |
11107036 |
Apr 1999 |
JP |
11107038 |
Apr 1999 |
JP |
11172526 |
Jun 1999 |
JP |
11302919 |
Nov 1999 |
JP |
9600808 |
Jan 1996 |
WO |
Non-Patent Literature Citations (3)
Entry |
The Mechanical Properties and Structure of Poly(m-methylene Terephthalate) Fibers, Journal of Polymer Science, Polymer Physics Edition, vol. 14, pp. 263-274 (1976). |
Texturing of textile filament yarns based on polytrimethylene terephthalate, Chemical Fibers International, vol. 47, Feb. 1997. |
Mechanical properties of fibers made of polytrimethylene terephthalate, Chemical Fibers International, vol. 45, Apr. 1995. |