A device for pneumatically conveying and guiding a multifilament thread has a closed conveying channel which has a thread inlet opening at one end and a thread outlet opening at the opposite end. An injector zone having at least one compressed air channel which opens into the conveying channel is formed between the thread inlet opening and the thread outlet opening, wherein the compressed air channel can be connected to a compressed air source. In order to avoid blowing air from flowing back from the injector zone at the thread inlet opening, a return flow channel is formed in a channel section of the conveying channel between the thread inlet opening and the opening of the compressed air channel, which return flow channel connects the conveying channel to ambient atmosphere.

The invention provides for a method of delaying and reducing texture reversion of a textured artificial turf yarn (145), characterized by using a stretched and textured monofilament yarn as the textured artificial turf yarn, the stretched and textured monofilament yarn comprising a polymer mixture (400, 500), wherein the polymer mixture is at least a three-phase system, wherein the polymer mixture comprises a first polymer (402), a second polymer (404), and a compatibilizer (406), wherein the first polymer and the second polymer are immiscible, wherein the first polymer forms polymer beads (408) surrounded by the compatibilizer within the second polymer.

A texturing device for producing crimped plastic filaments has a texturing nozzle with a hot compressed air supply port and a filament guide slot tube. A cooling mechanism in the form of a counter air flow mechanism is integrated in the texturing nozzle. A crimped plastic filament is formed by blowing a plastic filament through a nozzle insert in a conveying direction by hot compressed air and crimping in a filament guide slot tube. Then the crimped plastic filament is cooled by a counter air flow, which is cooler than the hot compressed air flow and which is directed onto the crimped plastic filament. A counter air flow slot tube is arranged between a cooling air supply port of the counter air flow mechanism and the filament guide slot tube. A pass-through nozzle is arranged between the counter air flow slot tube and the cooling air supply port.

Techniques produce a crimped composite thread, in which multiple individual threads are extruded in each case in the form of a plurality of strand-shaped filaments, cooled, drawn by means of a drawing device and together crimped by means of a crimping device to form the composite thread. Before the multifilament individual threads are crimped, they are entangled separately in each case by means of an entangling unit of an entangling device. A position and/or orientation of at least one of the entangling units relative to the drawing device, the crimping device and/or a further one of the entangling units is changed during the production of the crimped composite thread.