Hydroentangled flash spun webs having controllable bulk and permeability
US5290628A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1993 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Apr 21, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/689
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A process for hydraulically needling a web of staple fibers into an unbonded flash spun web made of continuous plexifilaments to form a spunlaced nonwoven fabric. The web of staple fibers is positioned against the unbonded flash spun web and then hydraulically needled such that the staple fibers are embedded into and entangled with the unbonded flash spun web to form a spunlaced nonwoven fabric. Optionally, the spunlaced nonwoven fabric can be thermally bonded to maintain or increase the permeability of the fabric. Thermal bonding can be used to control the level of permeability depending on the end-use desired. Spunlaced nonwoven fabrics made by the inventive process are particularly useful in filtration applications (e.g., vacuum cleaner bags) when thermal bonding is employed and as bulky, downproof and featherproof barrier liners for garments, sleeping bags, pillows, comforters and the like when thermal bonding is not employed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.