Method of making plural component fibers
US5162074A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 7, 1989 |
| Grant date | Nov 10, 1992 |
| Priority date | — |
| Expiry date | Aug 7, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/217
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for extruding a wide variety of plural-component fiber configurations in a spin pack utilizes one or more disposable distributor plates in which distributor flow paths are etched on one or both sides to distribute the polymer components to appropriate spinneret inlet hole locations. The etching process permits the distribution paths to be sufficiently small to facilitate issuing multiple discrete polymer component streams axially into each spinneret orifice inlet hole, whereby the resulting extruded fiber can be made up of at least one hundred side-by-side sub-fibers. If the adjacent sub-fibers are weakly bonded, they can be readily separated by agitation to significantly increase the effective yield from the spin pack and provide very fine and uniform fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.