Sliver (textiles)

A sliver (/ˈslaɪvər/) is a long bundle of fibre that is generally used to spin yarn. A sliver is created by carding or combing the fibre, which is then drawn into long strips where the fibre is parallel.[1] When sliver is drawn further and given a slight twist, it becomes roving.[2][3]

Worsted textiles differ from woolen textiles in that, after carding, they are subjected to gilling, a process to make sure the sliver has a more uniform linear weight, and add lubricants.[4][5][6]

Notes
  1. Yarn Production, National Cotton Council of America
  2. Freund, Kimberlie and Norton, Marjorie J.T., Broadwoven Fabrics, USITC Publication 3410: 4 ISBN 1-4289-5826-6
  3. Spinning Prep/Combing Lab, International Textile Center
  4. "gilling". Australian Wool Testing Authority. Retrieved 2019-06-11. Gilling is the blending together of card slivers with the direction of feed alternated to make a final sliver suitable for spinning.
  5. "Manufacturing of Worsted Yarns:". textile learner. Retrieved 2019-06-11. The preparative gilling is mainly to align the fibers in a parallel direction, further blend the wool through doubling and to add moisture and lubricants.
  6. "WORSTED - TOP-MAKING". Woolmark. Retrieved 2019-06-11. The latter is achieved by passing the wool at least once through a special gilling machine which has an auto-levelling device, which continuously detects the linear weight of the slivers being fed into the machine, and speeds up or slows down the machine accordingly.
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