Process of preparing continuous filament composed of nanofibers
US7807094B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Nov 12, 2004 |
| Grant date | Oct 5, 2010 |
| Priority date | — |
| Expiry date | Feb 15, 2027 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01D5/0076
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for producing a continuous filament made up of nanofibers is disclosed. A ribbon-shaped nanofiber web is prepared by electrospinning a polymer spinning solution onto a collector 7 applied with a high voltage, the collector 7 consisting of (I) an endless belt type nonconductive plate 7a with grooves having a predetermined width (u) and depth (h) formed at regular intervals along a lengthwise direction and a conductive plate 7b inserted into the grooves of the nonconductive plate, and then the nanofiber web is isolated (separated) from the collector 7, focused, drawn and wound. A continuous filament (yarn) made up of nanofibers can be produced by a simple and continuous process by providing a method for continuously producing a filament (yarn) by an electrospinning technique without a spinning process. The focusability and the drawability can be greatly improved by orienting nanofibers well in the fiber axis direction. Due to this, a continuous filament of nanofibers more excellent in mechanical properties can be produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.