Polyphenylene sulfide spunbond fiber
View Patent ↗The present invention is directed to a spunbond fiber comprising polyphenylene sulfide polymer having a zero shear viscosity at 300° C. of about 21,500 to about 28,000 Pa·s.
1. A spunbond fiber, consisting of polyphenylene sulfide polymer having a zero shear viscosity at 300° C. of about 21,500 to about 28,000 Pa·s.
2. The fiber of claim 1 , wherein said polyphenylene sulfide polymer has a zero shear viscosity at 300° C. of about 22,500 to about 27,000 Pa·s.
3. The fiber of claim 2 , wherein said polyphenylene sulfide polymer has a zero shear viscosity at 300° C. of about 23,500 to about 26,000 Pa·s.
4. The fiber of claim 1 , wherein said fiber has an average fiber diameter of less than about 50 micrometers.
5. The fiber of claim 4 , wherein said fiber has an average fiber diameter of less than about 20 micrometers.
6. The fiber of claim 1 , wherein said fiber has a circular cross section.
7. The fiber of claim 1 , wherein said fiber has a multi-lobal cross section.
8. A web comprising the fiber of claim 1 .