High loft low density nonwoven webs of crimped filaments and methods of making same
US7291239B2 · kind B2 · utility
57Cited by
66References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2004 |
| Grant date | Nov 6, 2007 |
| Priority date | — |
| Expiry date | Jul 8, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/681
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
High loft, low density nonwoven webs are produced by forming substantially continuous, spunbond, crimped, bicomponent fibers of A/B bilateral morphology in an unheated fiber draw unit. The fibers are then heated and cooled in the absence of impeding forces to achieve maximum crimp in the z-direction and produce a web of lofted material. The resultant material is particularly suitable for use as an insulator. Particulates may be added to the webs if desired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.