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US 2026/0185268 A1Published application
Extrusion apparatus for turf fiber monofilament
AssigneePolytex Sportbelage Produktions-GmbH
InventorsStephan SICK, Sven HAMANN, Dario GROCHLA, Dirk SANDER
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Abstract
An extrusion apparatus suitable for manufacturing artificial turf polymer fiber, in particular from LLDPE that is free of fiber splitting, wherein the extrusion apparatus is characterized in that a ratio of an equivalent diameter of the nozzle outlet over an axial length of the inner channel of the nozzle is from 0.90 to 1.10, or from 0.95 to 1.05.
Claims15
A coextrusion apparatus for manufacturing a bicomponent polymer fiber, the coextrusion apparatus comprising:
- a coextrusion head comprising a first inlet for receiving a core polymer component, a second inlet for receiving a cladding polymer component, a dual-channel nozzle having a nozzle outlet, and a coextrusion path connecting fluidly the nozzle outlet with a coextrusion head opening,
- the dual-channel nozzle including:
- an inner channel and an outer channel encompassing the inner channel, the inner channel being in hydraulic connection with the first inlet, the outer channel being in hydraulic connection with the second inlet, and
- a joining path establishing a hydraulic connection between the inner channel, the outer channel, and the nozzle outlet of the dual-channel nozzle,
- wherein a ratio of an equivalent diameter of the nozzle outlet over an axial length of the inner channel of the dual-channel nozzle is from 0.90 to 1.10, and
- wherein the equivalent diameter is a diameter of a circle-shape cross-section nozzle outlet having a same area as an area of an actual cross-section of the nozzle outlet.
3 more elements
Dependencies are inferred from the claim text.