Cotton Contamination Grades That Still Reach the Blowroom
Inline blowroom optical sensors fail when poor opening leaves inclusions hidden inside dense cotton tufts, allowing synthetic polymer fibers to reach spinning frames.
Saw-Tooth Wire Shredding
Mechanical Damage
A physical destruction of textile fibers occurs when they are subjected to excessive shear forces from worn or improperly set carding wires. This saw-tooth wire shredding occurs when the metallic clothing on the carding cylinder breaks and tears the fibers instead of straightening them. This action reduces the average fiber length and increases the amount of short fiber waste in the mill.
Shredding Mechanism
As fiber tufts are fed into the carding machine, the metallic saw-tooth wires grab and combed them to separate the individual fibers. If the wire teeth are damaged, burred or set too close to the flats, they tear the delicate fiber structures. This mechanical failure produces a high volume of fiber fragments and weakens the resulting card sliver.
Production Cost
Shortened fibers reduce the strength of the spun yarn and increase the frequency of yarn breakages during spinning and weaving. The high concentration of short fibers also leads to uneven yarn appearance and increased hairiness in the finished fabric. Consequently, mills must discard a larger volume of waste material, which raises the overall cost of production while decreasing the commercial value of the final yarn shipment.
Preventive Action
Carding technicians must perform regular inspections of the wire clothing to check for wear and damage. Periodic grinding of the saw-tooth wires restores their sharp edges and correct geometry, ensuring gentle fiber handling. Implementing a scheduled wire replacement program keeps the carding machinery operating at peak efficiency and maintains fiber length consistency.