Claims
- 1. A polypropylene fiber possessing at most 5,000 denier per filament and exhibiting a heat-shrinkage in at least 150° C. hot air of at most 11%, wherein said fiber further comprises at least one noncoloring nucleating agent, and wherein said fiber further exhibits a long period of at least 18.4 nm as measured by small-angle x-ray scattering.
- 2. The polypropylene fiber of claim 1 wherein said nucleating agent is selected from the group consisting of p-MDBS, 3,4-DMDBS, 2,4,5-TMDBS, Liquid 3,4-DMDBS, DBS, sodium benzoate, NA-11, NA-21, and any mixtures thereof.
- 3. The polypropylene fiber of claim 5 wherein said nucleating agent is p-MDBS.
- 4. A polypropylene fiber possessing at most 5,000 denier per filament and comprising at least one noncoloring nucleating agent, and wherein said fiber further exhibits a long period of at least 18.4 nm as measured by small-angle x-ray scattering.
- 5. The polypropylene fiber of claim 4 wherein said nucleating agent is selected from the group consisting of p-MDBS, 3,4-DMDBS, 2,4,5-TMDBS, Liquid 3,4-DMDBS, DBS, sodium benzoate, NA-11, NA-21, and any mixtures thereof.
- 6. The polypropylene fiber of claim 5 wherein said nucleating agent is p-MDBS.
- 7. A noncolored polypropylene fiber possessing at most 5,000 denier per filament and exhibiting a fiber peak crystallization temperature measurement of at least 115° C. as measured by differential scanning calorimetry in accordance with ASTM Test Method D3417-99 at a cooling rate of 20° C./min, and wherein said fiber further exhibits a long period of at least 18.4 nm as measured by small-angle x-ray scattering.
- 8. The polypropylene fiber of claim 7 wherein said fiber further comprises at least one noncoloring nucleating agent.
- 9. The polypropylene fiber of claim 8 wherein said at least one noncoloring nucleating agent is present in an amount of at least 100 ppm.
- 10. The polypropylene fiber of claim 9 wherein said nucleating agent is selected from the group consisting of p-MDBS, 3,4-DMDBS, 2,4,5-TMDBS, Liquid 3,4-DMDBS, DBS, sodium benzoate, NA-11, NA-21, and any mixtures thereof.
- 11. The propylene fiber of claim 10 wherein said nucleating agent is p-MDBS.
- 12. A yarn comprising at least one fiber as defined in claim 1.
- 13. A yarn comprising at least one fiber as defined in claim 4.
- 14. A yarn comprising at least one fiber as defined in claim 7.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of co-pending application 10/268,329, filed on Oct. 10, 2002, which is a continuation of application Ser. No. 09/860,005, filed on May 17, 2001, now U.S. Pat. No. 6,541,554. This parent application is herein entirely incorporated by reference.
Continuations (2)
|
Number |
Date |
Country |
Parent |
10268329 |
Oct 2002 |
US |
Child |
10422187 |
Apr 2003 |
US |
Parent |
09860005 |
May 2001 |
US |
Child |
10268329 |
Oct 2002 |
US |