US 11,655,566 B2
Method of delaying and reducing texture reversion of a textured artificial turf yarn
Stephan Sick, Willich-Neersen (DE); Dirk Sander, Kerken (DE); Bernd Jansen, Nettetal (DE); Ivo Lohr, Kempen (DE); and Kris Brown, Dalton, GA (US)
Assigned to Polytex Sportbelage Produktions-GmbH, Grefrath (DE)
Appl. No. 16/651,689
Filed by Polytex Sportbelage Produktions-GmbH, Grefrath (DE)
PCT Filed Oct. 5, 2018, PCT No. PCT/EP2018/077193
§ 371(c)(1), (2) Date Mar. 27, 2020,
PCT Pub. No. WO2019/068896, PCT Pub. Date Apr. 11, 2019.
Claims priority of provisional application 62/643,428, filed on Mar. 15, 2018.
Claims priority of application No. 17195136 (EP), filed on Oct. 6, 2017; application No. 17202272 (EP), filed on Nov. 17, 2017; and application No. 18185033 (EP), filed on Jul. 23, 2018.
Prior Publication US 2020/0291549 A1, Sep. 17, 2020
Int. Cl. B29C 33/02 (2006.01); B29C 33/04 (2006.01); B29C 33/06 (2006.01); C08J 3/22 (2006.01); D02G 1/16 (2006.01); D02J 1/22 (2006.01); D01F 8/06 (2006.01); D01F 8/12 (2006.01); D01F 8/14 (2006.01); D01F 8/16 (2006.01); D02G 1/12 (2006.01); E01C 13/08 (2006.01)
CPC D02G 1/165 (2013.01) [D01F 8/06 (2013.01); D01F 8/12 (2013.01); D01F 8/14 (2013.01); D01F 8/16 (2013.01); D02G 1/12 (2013.01); D02G 1/161 (2013.01); D02G 1/167 (2013.01); E01C 13/08 (2013.01); D10B 2505/18 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method of delaying and reducing texture reversion of a textured artificial turf yarn, the method comprising:
providing a monofilament yarn comprising a polymer mixture, wherein the polymer mixture is at least a three-phase system, wherein the polymer mixture comprises a first polymer, a second polymer, and a compatibilizer, wherein the first polymer and the second polymer are immiscible, wherein the first polymer forms polymer beads surrounded by the compatibilizer within the second polymer;
stretching the monofilament yarn to elongate the polymer beads to increase a volume of a crystalline fraction in the polymer mixture, and to form the monofilament yarn into a stretched monofilament yarn; and
texturing the stretched monofilament yarn to form the textured and stretched monofilament yarn,
wherein the elongating of the polymer beads and the increasing of the volume of a crystalline fraction delay and reduce the texture reversion of the textured artificial yarn, and wherein
the method further comprising:
receiving differential scanning calorimetry, DSC, data of a sample of the polymer mixture;
determining one or more melting temperatures of the monofilament yarn using the DSC data; and
determining a desired temperature of a gas-dynamic texturing process using the one or more melting temperatures,
wherein the texturing of the stretched monofilament yarn to form the textured and stretched monofilament yarn is performed in a gas-dynamic texturing process using a texturing apparatus and a controller being programmed to hold an actual temperature of the gas-dynamic texturing process in the texturing apparatus at the desired temperature.