Methods for producing through-fluid bonded nonwoven webs
US11236448B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2019 |
| Grant date | Feb 1, 2022 |
| Priority date | — |
| Expiry date | Aug 15, 2040 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD10B2331/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of creating a soft and lofty continuous fiber nonwoven web is provided. The method includes providing a first molten polymer and a second, different molten polymer to a spinneret defining a plurality of orifices and flowing a fluid intermediate the spinneret and a moving porous member. The method includes using the fluid to draw the first and second molten polymer components, in a direction toward the moving porous member, through at least some of the plurality of orifices to form a plurality of individual continuous fiber strands. The method includes depositing the continuous fiber strands onto the moving porous member at a first location to produce an intermediate continuous fiber nonwoven web, and intermittently varying a vacuum force applied to the moving porous member and to the intermediate web downstream of the first location and without the addition of more continuous fibers and without any heat applied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.