Spunbond fabrics and laminates from ultra low viscosity resins
US7666805B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Feb 7, 2001 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | Jan 16, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/681
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to a new non-woven fabric or laminate produced in a spunbond process using ultra low polymeric resins above 100 MFR as the raw materials using filament speeds above 5,000 meters per minute. The new materials produced possess an excellent combination of the softness and the strength resulting from ultra fine filaments attained through high spinning speed and the favorable filament structure allowing for strong binding achieved. One spunbond process that can be used for producing the fabric using the ultra low polymeric resins as raw materials is the process described in U.S. Pat. No. 5,688,468 and U.S. Pat. No. 6,183,684 that provides for filament speeds above 5,000 meters per minute.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.