Weavability of Lycra yarns as weft on Air-jet weaving machine “Negative” and Comparison with Rapier Weaving Machines “Positive”

While the Elastane yarns are widely used to produce stretch fabrics on knitting machines as well as rapier weaving machines. Its use in the air-jet weaving machine is so limit . so the objective of this paper is to study the availability of using the Lycra yarn on air-jet Machines. In the study we operate lycra yarn in three levels of air pressure of the main nozzle, and three levels of insertion and arrival timing to achieve suitable setting for operating. The experimental tests were conducted on the samples to have the highest quality factor in terms of a higher amount of actual production during the period of operation and with the best properties of the fabrics produced . The  Lycra yarns were also run on flexible weaving machines , in addition to make a comparison between the amounts of production achieved during the operating period of the air jet weaving and flexible rapier weaving machine , physical and mechanical properties of the fabric produced on air-jet  and  rapier weaving machine.

This study has demonstrated the need for the appropriate settings to compressed air of the main nozzle and three levels of insertion and arrival timing lycra yarn on the air-jet weaving machines. When we make comparison between the weaving machines with the negative air jet weaving machine and rapier weaving machine, we found a difference in the properties of fabrics produced and productivity.