Process for producing fibers for high strength non-woven materials
US5882562A · kind A · utility
8Cited by
101References
63Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 29, 1997 |
| Grant date | Mar 16, 1999 |
| Priority date | — |
| Expiry date | Dec 29, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Process of producing a polypropylene containing fiber and the resulting fiber and non-woven articles. The process involves the extruding of polypropylene containing material having a broad molecular weight distribution to form a hot extrudate having a surface, and quenching the hot extrudate in an oxidative atmosphere so as to effect oxidative chain scission degradation of the surface to obtain a fiber having a higher average melt flow rate as compared to an average melt flow rate of an inner, non-degraded portion thereof, and containing at least 7 percent of molecules having a molecular weight greater than 5.times.10.sup.5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.