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Salvage & its type.pptx

  1. Selvedge & its type
  2. Selvedge • The firm edge along the lengthwise direction of a woven fabric.
  3. • Types Of Selvedge Designs
  4. • Plain Selvedges These selvedges are constructed of the simple plain weave with the same size yarns as the rest of the fabric, but with the threads packed more closely together.
  5. • Tape Selvedges • The tape selvedges are sometimes constructed with the plain weave but often are made of the basket or twill weaves, which makes a flatter edge. • Tape selvedges are made of heavier yarns or ply yarns, which provide greater strength.
  6. • Split Selvedges • These are made by weaving a narrow width fabric twice its ordinary width with two selvedges in the center. • The fabric is then cut between the selvedges, and the cut edges are finished with a chain stitch or hemming. • Split selvedges are used when items such as towels are woven side by side and cut apart after weaving
  7. • Fused Selvedges • These selvedges are made on fabrics of thermoplastic fibers, such as polypropylene, nylon, etc., by pressing a hot mechanical element on the edges of the fabric. • The fibers melt and fuse together, sealing the edges.
  8. • Leno Selvedges • The leno selvedges are obtained by binding the wefts with strong additional threads working in leno or gauze weave and by eliminating through cutting the protruding weft ends. • Half cross leno weave fabrics have excellent shear resistance. They are made with special leno weaving harnesses. The leno selvedge is used on some shuttle less looms.
  9. Tucked-In Selvedges The tucked selvedge is a technique used on some shuttle less looms. A device is used to tuck and hold the cut ends into the fabric edge. In tucked-in selvedge, the fringed edges of the weft yarns are woven back into the body of the fabric using a special tuck-in mechanism. As a result, the weft density is doubled in the selvedge area. The tucked-in selvedge was being only used for projectile weaving machines in the past; however, it is now also applied to other shuttle less weaving machines.