Claims
- 1. A method for making a nonwoven web from staple fibers of polytrimethylene terephthalate which comprises:(a) making polytrimethylene terephthalate fibers having a cut length of from 10 to 200 millimeters and a fiber weight of 0.1 to 20 deniers per filament; (b) carding the staple fibers at a belt speed of up to 1000 meters per minute, a cross lap of web of from 1 to 50 layers and a web weight of 5 to 500 g/m2 in a carding machine selected from the group consisting of roller-top, flat-top, and layering types to produce a nonwoven web; and (c) mechanically bonding the web by hydroentanglement at a belt speed of up to 500 meters per minute with from 1 to 10 multiple passes and water jet hydraulic pressure of 1 bar to 500 bar (100 to 50000 kPa).
- 2. The method of claim 1 wherein the cut length in (a) is 25 to 80 mm and the fiber weight is 0.5 to 10 deniers per filament.
- 3. The method of claim 1 wherein the belt speed in (b) is from 10 to 1000 meters per minute.
- 4. The method of claim 2 wherein the belt speed in (b) is from 100 to 300 meters per minute, the cross lap is 3 to 10 layers, and the web weight is from 10 to 100 g/m2.
- 5. The method of claim 1 wherein the belt speed is from 5 to 500 meters per minute.
- 6. The method of claim 2 wherein the belt speed is from 50 to 200 meters per minute with from 1 to 10 multiple passes and a water jet hydraulic pressure of 5 bar to 250 bar (500 to 25000 kPa).
Parent Case Info
This application claims the benefit of U.S. Provisional Application No. 60/25,047 filed Sep. 25, 2000, and 60/287,357 filed Apr. 30, 2001, the entire disclosure of which is hereby incorporated by reference.
US Referenced Citations (9)
Foreign Referenced Citations (5)
Number |
Date |
Country |
1254826 |
Nov 1971 |
GB |
11158733 |
Jun 1999 |
JP |
11189938 |
Jul 1999 |
JP |
2000220067 |
Aug 2000 |
JP |
WO 0107693 |
Feb 2001 |
WO |
Non-Patent Literature Citations (1)
Entry |
International Search Report of Jun. 24, 2002. |
Provisional Applications (2)
|
Number |
Date |
Country |
|
60/235047 |
Sep 2000 |
US |
|
60/287357 |
Apr 2001 |
US |