Novel assembly of composite fibers
US4414276A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1981 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | Jul 29, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/298
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An assembly of fibers composed of at least two dissimilar fiber-forming polymers, characterized by the fact that PA1 (1) it consists of numerous fibers, PA1 (2) at least 90% of said fibers have a non-circular cross-sectional shape, PA1 (3) the cross sections of at least 50% of said fibers differ from each other in at least one of shape and size, and PA1 (4) at least 50% of said fibers each have in their cross section taken at right angles to the fiber axis at least two side-by-side coalesced blocks of at least two dissimilar fiber-forming polymer phases with at least a part thereof being exposed to the peripheral surface of the fiber, at least one of the number, shape and size of the blocks varying from fiber to fiber. The assembly of fibers can be produced by extruding a molten macroblend composed of many molten phases of at least two dissimilar fiber-forming polymers through a mesh spinneret having many small openings; and taking up the extrudates from the small openings while cooling them by supplying a cooling fluid to the extrusion surface of said spinneret or to its neighborhood, whereby said extrudates are converted into numerous separated fine fibrous streams and solidified…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.