Method and apparatus for extruding easily-splittable plural-component fibers for woven and nonwoven fabrics
US6627025B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 2001 |
| Grant date | Sep 30, 2003 |
| Priority date | — |
| Expiry date | Dec 21, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/0845
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A spinneret 20 for producing easily splittable plural-component fibers includes two passages 22 and 26 for respectively delivering two incompatible polymers (A and B) to two sets of inclined capillaries 34-39, 46-51. The two sets of capillaries converge toward each other in a downstream direction and direct molten polymer streams to two respective rows of orifices 40-45, 52-57. The centerlines of the polymer A capillaries lie along axes that, when extended beyond the spinneret, are offset and non-intersecting with axes along which the centerlines of the polymer B capillaries lie, such that the centerlines of the extruded polymer streams are directed along non-intersecting axes. The capillary angles and orifice arrangement cause the extruded polymer streams to extend toward each other in an interleaved fashion, with the polymer streams contacting each other in a generally tangential manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.