Method for producing nonwoven web using pulsed electrostatic charge
US5762857A · kind A · utility
14Cited by
12References
12Claims
0Family size
Inventors
Key dates
| Filing date | Jan 31, 1997 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Jan 31, 2017 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD04H3/03
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus is provided to cause deflection or oscillation of a bundle of spun thermoplastic filaments. A pulsing electrostatic charge and optionally an additional constant charge is applied to attenuated filaments prior to deposit of the filaments on a conveyor in the form of a web. Adjacent sections of filaments may be charged with different phases, and multiple pulsed charges may be applied. The pulsed charges cause movement or oscillation of the filaments resulting in better web uniformity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.