Spirality - How to prevent in knitted fabric

Reason for SPIRALITY-

• Yarn twist multiple play the big role on spirality- angle of spirality decrease only when the twist multiple decreases
• Tightness of knitting construction
• The number of feeder in a circular knitting machine also influence the angle of spirality.

To prevent the Spirality, following points should be followed up-

• Tight knitting is very important
• The tightness factor should be 14 to 16 for Jersey fabric
• Twist per inch (TPI) should be 19.2 at the spining stage itself
• The value of twist multiple of the yarn should not be more than 3.2 (formula- TM= TPI / square root of count of yarn)
• The loop shape factor should be 1.3 considerable
• Proper texture & guage must be maintained
• Grain lines must maintain straight
• During knitting, one to three needles should be dropped to get straightline of the fabric
• Relaxing of fabric should be made minimum of 12 hrs before cutting is started.
• Feeding S-twist & Z-twist yarns in alternate courses reduces the spirality
• Conditioning of Yarn before knitting in the steam....it reduces the snarling tendency of the yarn