Faults in the Knitted Fabrics (part4)

Snarls
Definition:
Snarls appear on the fabric surface in the form of big loops of yarn getting twisted due to the high twist in the yarn.
Causes:

• High twist in the yarn.

Remedies:

• Twist in the yarn should be in required TPM.

Contaminations
Definition:
Contaminations appear in the form of foreign matter such as; dyed fibers, husk, dead fibers etc. in the staple spun yarn or embedded in the knitted fabric structure.
Causes:

• Presence of dead fibers & other foreign materials, such as; dyed fibers, husk & synthetic fibers etc.
• Dyed & other types of fibers flying from the adjacent Knitting machines cling to the yarn being used for knitting & get embedded in the Grey Fabric.

Remedies:

• Use rich fiber mixing for the yarns to be used for Knitting in order to have less dead fibers appearing in the fabric.
• Rigid control measures in the Blow Room to prevent the mixing of foreign matters in the Cotton mixing.
• Segregate the Spinning & Knitting Machines, with Plastic Curtains or Mosquito Nets, to prevent the fibers flying from the neighboring machines, from getting embedded in the yarn / fabric.

Spirality
Definition:
Spirality appears in the form of a twisted garment after washing.The seams on both the sides of the garment displace from their position & appear on the front & back of the garment.

Causes:

• High T.P.I. of the Hosiery Yarn
• Uneven Fabric tension on the Knitting machine.
• Unequal rate of Fabric feed on the Stenter, Calender & Compactor machines.

Remedies:

• Use the Hosiery yarns of the recommended TPM level for Knitting.
• Ensure uniform rate of feed of the dyed fabric on both the edges while feeding the fabric to the Calender, Compactor or Stenter machines.