# US 4,396,366 A · Device for the production of a multicomponent yarn composed of at least two synthetic polymer components

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- Number: US 4,396,366 A
- Document ID: US4396366A
- Status: Granted
- Kind: A
- Application number: 06/419,890
- Filed: 1982-09-20
- Granted: 1983-08-02
- Earliest claimed: 1978-01-25
- Assignees: Akzona Incorporated
- Inventors: Erich Kessler; Peter Birken
- Web page: https://patentgrep.com/patent/US4396366A

## CPC

- D01F 8/14: with at least one polyester as constituent
- D01D 5/36: Matrix structure; Spinnerette packs therefor
- D01F: CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01D: MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS

## Abstract

A multi-component filament consisting of at least two polymer components and having a cross-section in which a matrix component separates several peripherally arranged segments of one or more segment components from each other, and a process for the production of such matrix/segment filaments, wherein the segment component is injected into the matrix component and fed to the spinneret opening in a combined stream with a plurality of segment components separated by the matrix. The multicomponent filament can be drawn to obtain individual microfilaments of less than 1 dtex after splitting, e.g. by false twist texturing.

## Claims

### Claim 1

Spinning apparatus for making a multi-component filament comprising a spinneret back plate having first transverse boreholes therein, a spinneret front plate having second transverse boreholes aligned with said first transverse boreholes in said back plate, a spinning orifice aligned with each of said second boreholes and adjacent thereto; a feed element for a matrix polymer component extending through each of said first and second boreholes, said feed elements each having a central duct, coaxial with said first and second boreholes, to supply said matrix polymer component to said spinning orifices, at least one feed channel and at least one distribution chamber for at least one other polymer component, each of said distribution chambers being connected to said central duct by a plurality of radial passages through the wall of said feed element, said feed elements having a zone intermediate the ends of said feed elements having a smaller diameter than the diameter of said first and second boreholes and having in said zone said radial passages for the said other polymer component and said radial passages lying in at least two planes perpendicular to the direction of the axis of said central duct.

### Claim 2 (depends on 1)

The apparatus of claim 1 wherein at least one of said passages consists of small tube through said feed elements having an outlet in the interior of said axial duct and spaced from the wall thereof.

### Claim 3 (depends on 2)

The apparatus of claim 2, wherein said outlets in the interior of said axial duct are at different distances from the axis of said axial hole.