Ems Inventa Ag

Gunter Goossens

Manfred Stein

Ulrich Kemp

Christian Baumann

A device and a method are disclosed, by means of which microfilament yarns made of synthetic polymers can be produced with increased uniformity of the titer, dye absorption and improved physical yarn properties at increased production speeds by means of a spinning process with spinnerets of high hole density and a central cooling unit.

Device and method for producing microfilament yarns with high titer uniformity from thermoplastic polymers

A pack for spinning core/sheath fibers from a plurality of fiber-forming materials including a distributor, a spinneret plate, and a separating plate therebetween. The distributor has a first conduit adapted to convey one of the first materials in a stream in a downstream direction, and a second conduit adapted to convey another material in a second stream in the same direction. The separating plate includes a core cavity, an annulus surrounding it, a sheath channel fluidly connecting the first conduit and the annulus, and a core channel fluidly connecting the second conduit and the cavity. The spinneret plate includes an exit channel with a die capillary at its downstream end fluidly connected to the annulus and the core cavity at its upstream end. The exit channel has an entry with diameter at least equal to the annular diameter, the entry being located at or adjacent the upstream end. As a result, the first stream surounds the second stream and both are extruded through the die capillary to form the fiber.

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Trin, Switzerland

Gunter Goossens