Package Density And Winding Angle

  • The yarn winding angle  [b]  mainly affects the package density [r] & the unwinding performance of the package .
  • It therefore has to be matched to the requirements with the utmost precision by adjusting the traverse per unit time of the thread guide.
  • The angle can usually be varied between 30-50  {33-46}degrees. The larger the angle , the lower the density & hence the greater the softness of the package.
  • In very general terms , the following operating ranges can be assumed:
  • 33-36 degrees for cylindrical packages;
  • About 40 degrees for cones;
  • 40-45 degrees for packages intended for package dyeing.
  • Where the latest generation of high-pressure dyeing equipment is available , dyeing can also be carried out with harder packages.
  •  However , the density r of the package depends not only upon the winding angle but also on :
    •  The winding tension
    •  The contact pressure of the package on the winding roll &      
    •  The yarn fineness . {finer yarn always give higher density}
  • Schlofhorst cites the following package densities {cotton yarns & yarns of fibres comparable with cotton  
    • Packages for package dyeing : r = 0.38 - 0. 42 g / cubic cm                
    • Hard packages : r=0.33 - 0.37 g/cubic cm

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