Yarn tension device
Certain amount of tension is necessary to be
imparted to the yarn to produce a compact to enable the weak places to break. There
are four types of Yarn tensioning devices.
(a) Lever type tension
(b) Gate type tension
(c) Disk type tension
(d) Fixed post tension package
and
Importance of tensioning device
Too high tension
(a) Can damage the yarn
(b) Breakage rate may greater
(c) Elongation properties may change.
Too low tension:
(1.)
Can lead to unstable or loose packages which will not unwind cleanly.
(2.)
Variation in yarn tension in different parts of a wound package can cause
undesirable effects.
For MMF:
Too
high tension
(1.)
Can cause molecular change which effects dye ability
(2.)
Random variation in colour shading
For Staple or Spun yarn:
Too high tension
(1.)
May breakage at thin place.
