Method for the production of nonwoven web materials
US8333918B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2003 |
| Grant date | Dec 18, 2012 |
| Priority date | — |
| Expiry date | Jan 16, 2030 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD04H3/14
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a method of making a nonwoven web, the method including the steps of providing plurality of fibers and subjecting the fibers to a pneumatic attenuation force which imparts a velocity to the fibers, reducing the velocity of the fibers in a diffusion chamber which is formed substantially between opposed diverging sidewalls, subjecting the fibers to an applied electrostatic charge, and thereafter collecting the fibers into a web on a moving forming surface. The invention also provides an apparatus for forming nonwoven webs, the apparatus comprising a source of fibers, a fiber attenuation chamber, a diffusion chamber formed substantially between opposed diverging sidewalls, the diffusion chamber located below the fiber attenuation chamber, and a forming surface for collecting the fibers as a nonwoven web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.