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|Title:||Effect of process variables on the properties of air-jet textured yarns using response surface design|
Kothari, V K
|Keywords:||Air-jet texturing;Box-Behnken design;Physical bulk;Polyester yarn;Response surface design;Tenacity|
|Abstract:||The effect of the main process variables, namely overfeed, air pressure and texturing speed, on the properties of air-jet textured yarns produced from three different polyester POY yarns of 115/36, 115/48 and 115/72 deniers has been studied. The interaction between the process variables has been taken into cons ideration by using response surface methodology based on the Box-Behnken design without producing samples with all the possible combinations of process variables. The response surface graphs obtained by varying two variables at a time keeping the third variable at a constant level have been studied and some of the graphs for air-jet textured yarns produced from 2 ends of 115/48 denier yarns are presented and discussed. The physical bulk of air-jet textured yarns increases significantly with the increase in overfeed and air pressure whereas it slightly decreases with the increase in texturing speed. The instability increases with the increase in overfeed and texturing speed while it decreases with the increase in air pressure. The tenacity values show a decreasing trend with all the three process parameters, i.e. overfeed, air pressure and texturing speed. The overfeed is found to be the most dominant process parameter out of the three parameters studied. The interaction effect of overfeed and air pressure is maximum on the physical bulk while the interaction of texturing speed and overfeed has the least effect. The interaction effect of texturing speed and overfeed on instability is maximum while that of overfeed a nd air pressure is the least. The response surfaces of yarn tenacity indicate that there is a significant interaction between air pressure and texturing speed whereas the interaction effect is least in case of overfeed and texturing speed .|
|ISSN:||0975-1025 (Online); 0971-0426 (Print)|
|Appears in Collections:||IJFTR Vol.27(3) [September 2002]|
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