Fibers and non-wovens prepared with propylene-based elastomers
US7863206B2 · kind B2 · utility
4Cited by
3References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2007 |
| Grant date | Jan 4, 2011 |
| Priority date | — |
| Expiry date | Oct 19, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/681
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Nonwoven fabrics and methods for making the same are described, wherein the fabrics comprise two or more propylene-based elastomers in combination with one or more propylene-based thermoplastic polymers. Specifically, the first propylene-based elastomer comprises at least 7% by weight ethylene or non-propylene alpha-olefin units, the second propylene-based elastomer comprises less than 7% by weight ethylene or non-propylene alpha-olefin units, the first and second propylene-based elastomers each have a heat of fusion less than 80 J/g, and the propylene-based thermoplastic polymer has a heat of fusion greater than 80 J/g.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.