WEBVTT

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Air jet spinning first appeared for production use in the early '80s.

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It has continued to grow in popularity,

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especially for cotton and polyester blend yarns.

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The largest end use market up to this point has been for sheeting and print cloth.

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Recent advancements in the latest generation

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of machines have made this high production

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system more forgiving to shorter fiber length and thus to cotton use.

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This has broadened the technology's versatility and

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appeal to more end-use possibilities.

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This spinning system uses sliver as its input,

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thereby taking advantage of the cost-savings afforded by

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deleting the roving step required by ring spinning.

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Much like rotor spinning,

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it also produces a wound package that is

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ready for subsequent use in weaving or knitting.

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This negates the need for a separate winding step.

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The air jet machine uses roller drafting as the

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means for reducing linear mass in the fed sliver.

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The drafting system is not unlike the drafting

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configuration found on the ring spinning system.

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After exiting the front pair of drafting rolls,

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the fiber is pulled into an orifice by a suction airflow

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created by the vortex that will perform the twist insertion.

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As the fiber enters the vortex zone,

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it is literally spun into a yarn structure by the whirling air currents.

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Like rotor spinning,

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there is some degree of random fiber entanglement that is also involved.

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This is the main reason for the somewhat lower yarn strengths

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of air jet yarns when compared to their ring-spun counterparts.

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Just as in rotor spinning,

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this process is highly automated with automatic piecing of broken

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ends and automatic doffing, or removal, of full yarn packages.