섬유

Index of Blend Irregularity -- Concept and Application.

  • 출판일2000.11
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 234
Blending is a vital stage in cotton fiber processing and yarn manufacturing. Coplan and Klein developed an index of blend irregularity (IBI) equation to measure the variation in blend proportion against the theoretically expected value for random mixing. Blend composition, number of fibers in the yarn cross section, and fiber fineness affect blend homogeneity in a blended yarn. When the index is equal to unity, the fibers are said to be random. More than one indicates overall excess of inhomogeneity beyond randomness. The IBI is generally higher for 80/20 polyester/cotton blends than for 50/50 or 20/80 blends. IBI values are also higher for coarser denier fibers. Higher drafting speeds result in higher IBI values. Blending on a drawing machine results in an IBI value of 1.92. Blowroom blending results in an IBI of 1.18. 6 refs.
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