Thick and thin fiber having grooves on its surface and process for producing the same
US4639397A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1984 |
| Grant date | Jan 27, 1987 |
| Priority date | — |
| Expiry date | Apr 12, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2978
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to an advanced silky thermoplastic polymer fiber being thick and thin along its axis and having two or more, preferably more than two axially-continuous grooves per filament with the entrance widths of 0.2 to 4.mu. and the depths of 0.1 to 1.8.mu.. The said fiber can be formed by dissolving out at least part of a easily-soluble polymer from a drawn composite fiber comprised of two differently-soluble thermoplastic polymer components, the easily-soluble one of said components having at least two locations with the areas of 0.2 to 4.mu. at the periphery of the transverse cross-section thereof and being thick and thin along its axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.