US 11,788,237 B2
Artificial turf fiber with a non-circular cladding
Stephan Sick, Willich-Neersen (DE); Dirk Sander, Kerken (DE); and Ivo Lohr, Kempen (DE)
Assigned to Polytex Sportbelage Produktions—GMBH, Grefath (DE)
Appl. No. 16/754,283
Filed by Polytex Sportbelage Produktions-GmbH, Grefrath (DE)
PCT Filed Nov. 2, 2018, PCT No. PCT/EP2018/080047
§ 371(c)(1), (2) Date Apr. 7, 2020,
PCT Pub. No. WO2019/086624, PCT Pub. Date May 9, 2019.
Claims priority of application No. 17199888 (EP), filed on Nov. 3, 2017.
Prior Publication US 2020/0308777 A1, Oct. 1, 2020
Int. Cl. E01C 13/08 (2006.01); D01D 5/253 (2006.01); D01F 6/46 (2006.01); D01F 6/90 (2006.01); D01F 6/92 (2006.01); D06N 7/00 (2006.01)
CPC E01C 13/08 (2013.01) [D01D 5/253 (2013.01); D01F 6/46 (2013.01); D01F 6/90 (2013.01); D01F 6/92 (2013.01); D06N 7/0065 (2013.01); D10B 2505/202 (2013.01); Y10T 428/23957 (2015.04); Y10T 428/23993 (2015.04); Y10T 428/2929 (2015.01); Y10T 428/2973 (2015.01)] 19 Claims
OG exemplary drawing
 
1. An artificial turf fiber comprising at least one monofilament, each of the at least one monofilament comprising a cylindrical solid core and a cladding,
the solid core comprising a core polymer and thread regions formed by a thread polymer, the thread regions being embedded in the core polymer,
the cladding being formed by a cladding polymer, the cladding surrounding the solid core and having a non-circular profile, the cladding polymer being miscible with the core polymer,
the cladding forming two protrusions which extend from the solid core, wherein a profile of each protrusion includes a smooth side and an undulated side opposite the smooth side, wherein the undulated sides of the two protrusions enclose an angle between 100 degree and 180 degrees,
the cladding further forming two smooth circular sections on opposite sides of the solid core,
the smooth side profile of each protrusion being a concave smooth side, and
the concave smooth side of a first protrusion of the two protrusions connected to the concave smooth side of a second protrusion of the two protrusions via a smooth circular section of the two smooth circular sections of the cladding.