Open-end Spinning Definition
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Note: Open-end yarns are more coarse than ringspun yarns.

Open-end spinning is a technology for creating yarn without using a spindle.  It is also known as break spinning or rotor spinning.

 The principle behind open-end spinning is similar to that of a clothes dryer spinning full of sheets. If you could open the door and pull out a sheet, it would spin together as you pulled it out. Sliver from the card goes into the rotor, is spun into yarn and comes out, wrapped up on a bobbin, all ready to go to the next step. There is no roving stage or re-packaging on an auto-coner. This system is much less labor-intensive and faster than ring spinning with rotor speeds up to 140,000 rpm. The Rotor design is the key to the operation of the open-ended spinners. Each type of fiber may require a different rotor design for optimal product quality and processing speed.

It was invented and developed in Czechoslovakia in Výzkumný ústav bavlnářský / Cotton Research Institute in Ústí nad Orlicí in 1963.

One disadvantage of open-end spinning is that it is limited to coarser counts, another is the structure of the yarn itself with fibers less in parallel compared to ring-spun yarns, for example, consequently cloth made from open-end yarn has a "fuzzier" feel and poorer wear resistance.

You should also take some time to learn about ringspun yarns & fabrics.

The above article is licensed under the GNU Free Documentation License. From Wikipedia, the free encyclopedia (  5/11/05

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